https://jpralves.net/2024-05-30T00:00:00+01:00Joao Alves personal site with information related to electronics, science, technology and computers2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/3d-printeed-mars-rover-using-esp12e.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_3DPrinteedMarsRoverUsingEsp12E_t.jpg" /></p><p>“Lets build a 3D-printed rocker-bogie MARS rover using esp12e A Mars rover is a remote-controlled robot designed to travel on the surface of Mars. we have seen several Mars rovers like Spirit, Opportunity, Curiosity and Perseverance. these rovers are highly …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/a-calliope-mini-3-clock-with-timer.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_ACalliopeMini3ClockWithTimer_t.jpg" /></p><p>“A simple clock with a countdown timer function implemented with the Calliope mini 3 and some Grove modules. A simple clock with a countdown timer function for the Calliope mini 3. I made this to experiment with the new Calliope …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/a-linear-led-clock-for-your-desktop.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_ALinearLedClockForYourDesktop_t.jpg" /></p><p>“One of my favorite types of projects to work on are clocks. Many people are fascinated, and sometimes even obsessed, with the passage of time, and I’m no exception. I love creating new projects and finding interesting ways to …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/advanced-smart-parking-system-v-20.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_AdvancedSmartParkingSystemV20_t.jpg" /></p><p>“About Advanced & Smart Parking System: - An Advanced and smart Parking System utilizing Arduino Mega, ultrasonic sensors, and ESP8266 has been developed to efficiently manage a parking lot with 10 spaces. The Arduino Mega serves as the central control unit, orchestrating …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/all-about-ic-uln2003.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_AllAboutIcUln2003_t.jpg" /></p><p>“Let’s deep-dive and check out the internals of the ULN2003 IC and how it can be used in our projects. The UNL2003 IC contains 7 High Voltage, High Current NPN Darlington Transistor Arrays each rated at 50V, 500mA in …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/analog-toolkit.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_AnalogToolkit_t.jpg" /></p><p>“A small and simple STM32G431 based dev board, that doubles as analog-to-USB acquisition tool. Next to 6 single ended or 2 differential ADC inputs (upt to 16bit), there are 3 PGA connected ADC inputs (up to 16bits), 3 general …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/animatronic-fox-head-companion-bot.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_AnimatronicFoxHeadCompanionBot_t.jpg" /></p><p>“This animatronic fox can wiggle its ears, tilt its head and has animated eyes. All movement and animations play autonomously and at random. I’m making a companion bot (think a tiny animatronic friend who can travel to conventions and …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/arduino-cnc-thermocol-cutter.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_ArduinoCncThermocolCutter_t.jpg" /></p><p>“In this project, I’d like to share how to build a 2-axis thermocol/ polystyrene cutting CNC machine with its frame and supports made of electrical wire casing/duct and 3D printed parts. Basically it is a thermocol cutting tool …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/arduino-display-matrix-32-x-8-dots.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_ArduinoDisplayMatrix32X8Dots_t.jpg" /></p><p>“Looking to learn how to build a compact size LED matrix for Arduino? then this article is what you are looking for. Today, I’m thrilled to guide you through the steps to create your very own 32x8 compact LED …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/augmented-reality-tic-tac-toe.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_AugmentedRealityTicTacToe_t.jpg" /></p><p>“Using Python, OpenCV a projector and a webcam, our students created a tic tac toe game you can play on a video wall. The Motive One of the major set-backs of learning to code in a young age is the …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/automating-a-mushroom-house.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_AutomatingAMushroomHouse_t.jpg" /></p><p>“This is a collaboration with a local High School to create a project with real-world applications, as well as teach the students new skills. A short while ago, the local high school in my area and myself decided to collaborate …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/breadboard-implementation-of-the-wilson-current-mirror.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_BreadboardImplementationOfTheW_t.jpg" /></p><p>“Exciting project alert! I’ve implemented a Wilson Current Mirror on a breadboard, showcasing precision current mirroring in analog circuits. Current mirrors are fascinating analog circuits that can replicate or mirror currents in 2 different parts of an electrical system …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/breadboardbot.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_Breadboardbot_t.jpg" /></p><p>“A tiny, versatile and fun toy robotics platform made from a mini-breadboard, two servo-motors with wheels, a battery box and some hot glue. What is the best way to learn (or teach) introductory robotics? What could be the “hello world …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/breadboardos.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_Breadboardos_t.jpg" /></p><p>“BreadboardOS (BBOS, if you like) - as its namesake implies - is a firmware platform aimed at quick prototyping. BBOS was built around the following principles: - Every project should start with a CLI. A command line interface makes prototyping, debugging, and testing …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/build-your-own-youtube-channel-statistics-meter-with-c3-mini.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_BuildYourOwnYoutubeChannelStat_t.jpg" /></p><p>“Monitor your YouTube channel’s growth in real time with our compact OLED display powered by ESP32-C3 Mini. See stats at a glance! Are you curious about your YouTube channel’s performance and want to see real-time statistics at …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/building-your-own-environmental-sensor-using-bme680-with-esp.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_BuildingYourOwnEnvironmentalSe_t.jpg" /></p><p>“Design and Implementation of an Environmental Sensor with Integrated BME680 for Multi-Parameter Measurements. In this project, we will create a Environmental sensor using BME680 which can measure Temperature, Humidity, Altitude, Pressure & Gas resistance value. We use ESP 8266 D1 Mini …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/can-fd-interface-for-raspberry-pico.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_CanFdInterfaceForRaspberryPico_t.jpg" /></p><p>“MCP2518FD-on-Raspberry-Pico Simple implementation of CAN BUS logger with Raspberry Pico and MCP2518FD. Introducing the Raspberry Pico CAN FD Logger – a compact yet powerful tool for logging Controller Area Network (CAN) data with Flexible Data Rate (FD) support. This logger …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/cartoon-digital-clock-with-switchable-style.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_CartoonDigitalClockWithSwitcha_t.jpg" /></p><p>“Hey everyone! You know we already have a 1.28 inch screen, and now, we have an upgraded new product, MaTouch ESP32 S3 Rotary IPS Display 1.2 Do you find that the style of your digital clock doesn’t …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/ch32v003-fm-radio-receiver-with-rds.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_Ch32V003FmRadioReceiverWithRds_t.jpg" /></p><p>“With the portable Li-Ion battery powered FM radio receiver you can listen to your favourite radio station. This device is equipped with cost-effective components, including a CH32V003J4M6 32-bit RISC-V microcontroller, a RDA5807MP FM radio tuner IC, an audio amplifier …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/chiming-clock-2.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_ChimingClock_t.jpg" /></p><p>“An update of a previous big ben digital chiming clock, with an Android bluetooth app to adjust the time and set the date on boot up. This is a variation of a previous Chiming Clock project. By using an ESP32 …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/circuitpython-neopixel-maze-game.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_CircuitpythonNeopixelMazeGame_t.jpg" /></p><p>“Creating a maze game for Neopixel screens. Move the pixel through the maze and reach the exit. This is another experiment we are doing at the Sesc São Paulo Workshop. I adapted the Orestis Zekai maze generator code to run …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/contactless-temperature-measure.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_ContactlessTemperatureMeasure_t.jpg" /></p><p>“Contactless temperature measure with arduino and Blynk.io Embark on a modern approach to temperature monitoring with our project on ‘Contactless Temperature Measurement using Arduino and Blynk.’ Utilizing infrared sensors, Arduino technology, and the Blynk app, this project enables you …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/control-ac-fan-speed-using-arduino-generated-pwm.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_ControlAcFanSpeedUsingArduinoG_t.jpg" /></p><p>“In this project we will demonstrate AC fan speed control with Arduino using TRIAC. Here the phase control method of AC signal is used to control the speed of AC fan using PWM signal generated by Arduino. In the previous …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/cyber-clock-an-iot-oled-desk-clock-with-hygro-thermometer.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_CyberClockAnIotOledDeskClockWi_t.jpg" /></p><p>“As a tech enthusiast, I love seeing new technology and inventions. That’s why I’m a big fan of Tesla, especially the Cybertruck. I think its design is cool and futuristic. I always wanted to 3D print a small …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/designing-a-high-performance-stepper-motor-driver-with-tmc22.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_DesigningAHighPerformanceStepp_t.jpg" /></p><p>“In this project, we’ll explore how to create a high-performance stepper motor driver circuit using the TMC2209. Circuit Connection Connect the TMC2209 as follows: 1. Power Supply Connections: - Connect the VBB/VCC pin to the positive terminal of the …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/developing-a-line-following-robot-with-ai-enabled-tasks.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_DevelopingALineFollowingRobotW_t.jpg" /></p><p>“Line-following robot with AI smarts—Wameedh Scientific Club’s Arduino and Raspberry Pi combo redefines robotics. Join the revolution! The Line Following Robot project aimed to create an intelligent robot using infrared sensors, empowered with AI capabilities like human detection …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/diy-200w-smart-mini-inverter-pcb.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_Diy200WSmartMiniInverterPcb_t.jpg" /></p><p>“Revolutionize your power solutions with our DIY 200W Smart Mini Inverter PCB featured on Hackster. io! Elevate your electronics projects. Story In a world fueled by innovation, imagine having the power to create your own smart mini inverter, capable of …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/diy-arduino-ultrasonic-sonar-radar-on-tft-display.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_DiyArduinoUltrasonicSonarRadar_t.jpg" /></p><p>“This is a very simple, easy to make, visually effective, and self-contained device intended for both beginners and more advanced DIYers. Ultrasonic sonar is devices that use sound waves with frequencies higher than the upper audible limit of human hearing …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/diy-audio-amplifier-board.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_DiyAudioAmplifierBoard_t.jpg" /></p><p>“PAM8403 based Custom Audio Board for a Future Pi-Gaming Related Project. Greetings everyone, and welcome back. Here’s a small audio-based project I prepared for an upcoming Game Boy project. The PAM8403 Audio Amplifier IC Setup, in addition to a …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/diy-fm-radio-station.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_DiyFmRadioStation_t.jpg" /></p><p>“A small, cheap, low-powered FM Radio Transmitter to create your own Radio Station at home. A Project For Signals & Systems course Being enrolled in the Mechatronics Engineering program, we were assigned an open-ended project for our Signals and Systems course …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/diy-precise-arduino-miliohmmeter.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_DiyPreciseArduinoMiliohmmeter_t.jpg" /></p><p>“Simple and inexpensive way to make such an instrument, with which we can measure resistances with a resolution of 1 milliohm. In practice, we very often need to measure low resistances. Measuring low-value resistances, especially those less than 1 ohm …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/diy-simplest-small-crt-oscilloscope.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_DiySimplestSmallCrtOscilloscop_t.jpg" /></p><p>“Simplest possible way to make a compact retro-style analog oscilloscope with a cathode ray tube (CRT), which is powered by 12V. An oscilloscope is a measuring instrument used to visualize and analyze electronic signals. It is commonly used in various …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/diy-smart-home-using-unihiker-and-nodemcu.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_DiySmartHomeUsingUnihikerAndNo_t.jpg" /></p><p>“In this project, we’ll be harnessing the power of the new Unihiker Single Board Computer (SBC) to create a smart home setup. Welcome to the world of DIY smart homes! In this project, we’ll be harnessing the power …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/diy-ultrasonic-range-finder-with-esp32.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_DiyUltrasonicRangeFinderWithEs_t.jpg" /></p><p>“In this Article, we learn about how to make DIY Ultrasonic Range Finder with ESP32. Components required: 1. ESP32 board 2. Sonar sensor 3. Power supply 4. Jumper wires Working Overview: An ultrasonic range finder can be connected to an …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/dual-spiral-marble-clock.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_DualSpiralMarbleClock_t.jpg" /></p><p>“This is another one of my clock projects this time inspired by marble clocks. However, not wanting to replicate an existing design I created my own. Where most marble clocks contain a large number of marbles, this design is minimalist …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/electromagnetic-field-meter-emf-meter.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_ElectromagneticFieldMeterEmfMe_t.jpg" /></p><p>“A small portable EMF meter to detect and measure magnetic fields This portable Electromagnetic Field Meter (EMF meter) is a rebuild of Marco Zonca’s Magnetic Field Meter range +- 200mT (milliTesla). The hardware has been redesigned to run from a …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/esp32-based-intruder-detection-system.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_Esp32BasedIntruderDetectionSys_t.jpg" /></p><p>“Cyclops Eye is a camera-mobile app duo which is used for realtime surveillance and intruder detection. Cyclops Eye is a surveillance camera with an inbuilt AI system. this camera has following features,1. face detection 2. face recognition 3. face …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/esp8266-esp32-microphone-camera-package.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_Esp8266Esp32MicrophoneCameraPa_t.jpg" /></p><p>“The ESP8266,ESP32 Microphone Camera Package includes ESP8266 WiFi Microphone,ESP32 WiFi Microphone,ESP32 IP Camera and ESP32 Camera Microphone projects firmware, Arduino.ino files, Schematics and PCB files. ESP8266, ESP32 Microphone Camera This package is called “WiCard Security System …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/experience-ethernet-on-the-pico-with-just-one-usb-c-type.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_ExperienceEthernetOnThePicoWit_t.jpg" /></p><p>“One USB C-Type, endless possibilities! Check out my latest project, enabling Ethernet on the Pico using just a single USB C-Type connect Hello. I’ve come up with a groundbreaking idea. It’s a USB C-Type Connector that can handle …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/fix-belt-cnc-plotter.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_FixBeltCncPlotter_t.jpg" /></p><p>“Today, I’d like to share how to build a fixed belt CNC plotterthat has a very different construction from the others, in that both axes XY are made from fixed timing belts and their stepper motors are hidden inside …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/gesture-controlled-lighting-using-bolt-iot.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_GestureControlledLightingUsing_t.jpg" /></p><p>“A project that incorporates Computer Vision in tandem with Bolt IoT. Get ready to control LEDs using just your fingers! Ever since the advent of the computers in the late 1990s, technology has been moving forward at an unprecedented rate …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/gesture-controlled-smart-wifi-clock.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_GestureControlledSmartWifiCloc_t.jpg" /></p><p>“Build a Smart WiFi Clock using Seeed Studio’s Grove Smart IR Gesture Sensor and XIAO ESP32S3 This project shows how to build a Gesture Controlled Smart WiFi Clock using Seeed Studio’s XIAO ESP32S3 and Grove Smart IR Gesture …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/gpioviewer.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_Gpioviewer_t.jpg" /></p><p>“Arduino Library to see live GPIO Pins on ESP32 boards Installation Arduino IDE (Version 2) ℹMake sure you have the latest ESP32 boards by Espressif Systems in your Board Manager Install the GPIOViewer Library with the Arduino IDE Library Manager …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/ground-station-monitor-control.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_GroundStationMonitorControl_t.jpg" /></p><p>“QO-100 ground station monitor and control shield using the new Arduino UNO R4 WiFi board. Customisable for generic IOT use also. I finally found time to address a pending project which had been relegated to the back burner. The …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/hack-the-chip.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_HackTheChip_t.jpg" /></p><p>“Use a General Purpose Microcontroller to replace your Custom Chip Are you being squeezed by Supply Chain Shortages? Is your chip no longer being made? Is there a firmware bug in your Chip? Can’t get the chip you need …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/hackbat.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_Hackbat_t.jpg" /></p><p>“An open-source hacking hardware platform based on the RP2040 with RF, NFC, USB, and SD card ready for pen testing research. In the cybersecurity field, engineers are always looking for vulnerabilities in order to fix them and prevent other actors …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/half-dial-wall-clock.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_HalfDialWallClock_t.jpg" /></p><p>“This is wall LED clock. Despite to have only twenty LEDs it is full day clock showing time with 15 seconds precision. Is it really possible? May by these LEDs packs the time in so cryptic code that no ordinary …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/home-assistant-esp32-wireless-sump-pit-level-monitoring-iot.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_HomeAssistantEsp32WirelessSump_t.jpg" /></p><p>“Monitor the level of a basement sump-pit and trigger notifications/alarms if the level becomes too high Background In a previous project, I had configured a raspberry-pi 5 to host Apache which served up the temperature of the Pi’s …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/how-to-build-simple-cheap-hulda-clark-syncrometer.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_HowToBuildSimpleCheapHuldaClar_t.jpg" /></p><p>“Hulda Clark’s Syncrometer was a device she claimed could detect the presence of various substances in the body, such as parasites, toxins, and pathogens. Hulda Clark was a controversial figure in the alternative medicine community, and her ideas and …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/how-to-build-web-socket-on-raspberry-pi-pico-w-and-make-live.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_HowToBuildWebSocketOnRaspberry_t.jpg" /></p><p>“By the end of this tutorial, you’ll have a dashboard displaying the temperature readings from your Raspberry Pi Pico W using Web Socket. In this step by step guide, I’ll dive into how to create a live temperature …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/how-to-create-esp8266-web-server-to-make-your-own-smart-home.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_HowToCreateEsp8266WebServerToM_t.jpg" /></p><p>“Transform your home into a smart home with our step-by-step guide on How to Create ESP8266 Web Server to Make Your Own Smart Home. Getting started with the ESP8266 Node MCU, from setting up the hardware to installing drivers on …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/how-to-make-a-diy-cnc-laser-engraver-at-home.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_HowToMakeADiyCncLaserEngraverA_t.jpg" /></p><p>“Hi, In this project I will show you how to Make a DIY CNC Laser Engraver, Are you a fan of engraving? Yes most of us are, How cool is it to have a picture of something on your favorite …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/how-to-make-diy-music-reactive-rgb-led-ring-ws2812b.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_HowToMakeDiyMusicReactiveRgbLe_t.jpg" /></p><p>“In this tutorial we are going to make music reactive lights with Arduino Nano ESP32 board with Neopixels LED ring & microphone using Visuino Every time the sound is detected the LEDs will move and randomly change colors. In case you …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/how-to-make-simplest-possible-autorange-capacitance-meter.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_HowToMakeSimplestPossibleAutor_t.jpg" /></p><p>“This is the stand-alone capacitance meter that you can make using only two electronic components. The capacity measurement option is usually only available in more expensive multimeters, so it is desirable to make such an instrument ourselves, especially if it …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/how-to-stream-encrypted-images-over-udp.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_HowToStreamEncryptedImagesOver_t.jpg" /></p><p>“Learn How to Use the UDP Image Uploader Software with Serpent Encryption Algorithm in CBC Mode In this tutorial, I will demonstrate how to transfer an encrypted image from your PC to the display connected to the microcontroller via Wi-Fi …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/iaq-monitoring-using-digital-art-w-rpi-processing-cloud.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_IaqMonitoringUsingDigitalArtWR_t.jpg" /></p><p>“Indoor Air Quality monitoring via soothing digital art to control your air quality aesthetically without over-stressing about it. What is it and motivation behind the idea Indoor Air quality (IAQ) depends on numerous factors which includes the following: - Temperature: if …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/jetcar-the-mini-self-driving-car-project.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_JetcarTheMiniSelfDrivingCarPro_t.jpg" /></p><p>“The JetCar is a mini self-driving car based on the Jetson Nano. It navigates on a street map and obeys stop text and direction arrows. Overview The JetCar is a 3D printed car around the Jetson Nano development board from …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/led-tester-calculator.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_LedTesterCalculator_t.jpg" /></p><p>“A hand held LED tester and calculator that can measure the forward voltage drop and determine the value of the current limiting resistor. Around a month ago, fellow Hackster Mirko Pavleski published his Arduino LED Tester + Resistor Calculator project. This …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/lightning-detector-arduino-nano-shield-with-ta7642.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_LightningDetectorArduinoNanoSh_t.jpg" /></p><p>“Blitz-O-shield: Arduino Nano shield for thunderstorms and the (usually) associated lightning detection I’ve always been fascinated by thunderstorms and the (usually) associated lightning. So it would be good to know in advance whether a thunderstorm is approaching, wouldn’t …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/lithophane-rgb-lamp-rechargeable.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_LithophaneRgbLampRechargeable_t.jpg" /></p><p>“A base for a lithophane light but could be used with any type of shade. 5 modes; white, red, green, blue and colour changing. The base was designed to fit lithopane 3d printed shades. The shades were created using Voxelab …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/max7219-8x8-led-matrix-module-arduino-interfacing.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_Max72198X8LedMatrixModuleArdui_t.jpg" /></p><p>“The article provides an in-depth exploration of the MAX7219 8x8 LED Matrix Module, and how to interface it with an Arduino. The MAX7219 8x8 LED matrix module is a compact, versatile display unit favoured by electronics hobbyists and developers working …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/meshtastic-diy-how-to-build-your-own-meshtastic-node-esp32.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_MeshtasticDiyHowToBuildYourOwn_t.jpg" /></p><p>“Create your own Meshtastic LoRa Node with our easy DIY guide. A complete step-by-step for building your customized mesh communication system In this guide, we’ll walk you through building your very own Meshtastic LoRa Node. Sure, you could easily …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/mini-tesla-coil-from-aliexpress-into-a-real-powerful-sstc.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_MiniTeslaCoilFromAliexpressInt_t.jpg" /></p><p>“Turn this small, cheap, and almost non-functional device into a real Tesla coil that generates a sparks with a length of several centimeter Some time ago I bought a mini tesla coil kit from an online store that cost less …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/modular-macro-keyboard-system-ocreeb-mk2.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_ModularMacroKeyboardSystemOcre_t.jpg" /></p><p>“The Ocreeb MK2 is a modular macro keyboard system with a custom magnetic connector and some problems still. The Ocreeb MK2 is the second iteration of the original 12-key macropad. After collecting feedback over the past few months, I decided …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/morse-code-decode.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_MorseCodeDecode_t.jpg" /></p><p>“Ever wanted to learn Morse Code but never knew how to start? Try out this fun game as a catalyst for your cryptographical adventure! Think back to when you were a child…to the days of when you had the …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/multi-channel-autorange-oled-voltmeter.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_MultiChannelAutorangeOledVoltm_t.jpg" /></p><p>“A 4-channel 0 to 27V voltmeter with tiny OLED display. Uses ATTINY1614 MPU (could be 1604) and 72x40 0.42in I2C OLED module. Also shows inputs as TTL levels: 0, 1 or indeterminate. Notable design features - Size 18x21x11mm - Autoranges six …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/multi-functional-clock-system-with-two-pico-2040-based-units.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_MultiFunctionalClockSystemWith_t.jpg" /></p><p>“Dual Clock System consisting of two Pico-2040 micro controller-based clocks connected via I2C The Multi-functional Clock System is composed of two distinct clocks, each based on the Pico-2040 micro controller. These clocks are interconnected via an I2C Bus, facilitating communication …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/non-split-flap-digital-clock.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_NonSplitFlapDigitalClock_t.jpg" /></p><p>“I developed a new clock mechanism to address the issues present in existing mechanical clocks. Famous split-flap displays exhibit undesirable parting lines in the text, and their display surfaces cannot be tilted as they rely on gravity. Numechron-type clocks feature …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/pan-tilt-assembly-for-mg90s-servos.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_PanTiltAssemblyForMg90SServos_t.jpg" /></p><p>“A 3D printed pan and tilt assembly for your MG90S servos. This 3D print turns your MG90S servos into a pan and tilt assembly that can be used for all sorts of things including cameras, animatronics, and whatever else you …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/pid-temperature-control-of-a-miniature-thermal-chamber.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_PidTemperatureControlOfAMiniat_t.jpg" /></p><p>“The PID Temperature Control of a miniature thermal chamber is a system designed for teaching the fundamentals of Process Control. Story The PID Temperature Control of a miniature thermal chamber is a system designed for educational purposes. It can be …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/pip-watch-project.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_PipWatchProject_t.jpg" /></p><p>“Pipboy inspired watch from the Fallout game series. Meet PipWatch, a PipBoy-inspired wrist watch powered by a FireBeetle ESP32 board along with a round GC9A01 display. For those who are not familiar, a pipboy is a wrist-mounted computer device that …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/power-brick-kitchen-timer-alarm-clock.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_PowerBrickKitchenTimerAlarmClo_t.jpg" /></p><p>“A simple Kitchen timer with an Internet Alarm Clock built inside a power brick. A few years back, fellow Hackster Juraj published a Kitchen timer and clock which he built into a power brick. I liked this concept so I …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/projet-openrucheg2.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_ProjetOpenrucheg2_t.jpg" /></p><p>“Hive monitoring using sensors and LoraWan network. Bee colony are threatened by predators, pesticides and lack of food, thus limiting the pollinisation of plants and reducing our harvest in honey. The focus of this project is to monitor the health …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/quadrupling-the-sample-rate-of-an-rp2040-oscilloscope.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_QuadruplingTheSampleRateOfAnRp_t.jpg" /></p><p>“With a few lines of code we were able to quadruple the sample rate and bandwidth of our RP2040 based oscilloscope. We show you how. Any oscilloscope that uses the RP2040 ADC will be limited by its modest maximum sample …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/rp2040-eth-dvi-zero-anyview-hdmi-mode.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_Rp2040EthDviZeroAnyviewHdmiMod_t.jpg" /></p><p>“Continuously screenshot the image of a specific window on the PC and send it to another monitor by network, this monitor receive and display I developed a new application AnyView based on RP2040-ETH-DVI-ZERO. This application can transmit …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/rp2040-zx-spectrum-emulator.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_Rp2040ZxSpectrumEmulator_t.jpg" /></p><p>“The ZX2040 is a port of Andre Weissflog ZX Spectrum emulator to the Raspberry Pico RP2040, packed with a simple UI for game selection and key mapping to make it usable without a keyboard. This project is specifically designed for …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/simple-esp32-internet-radio-on-vfd-display.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_SimpleEsp32InternetRadioOnVfdD_t.jpg" /></p><p>“The simplest way to make an Internet radio with a minimum number of components Internet radio, also known as online radio or streaming radio, refers to the broadcasting of audio content over the internet. Unlike traditional radio stations that transmit …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/simulate-an-analog-voltmeter.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_SimulateAnAnalogVoltmeter_t.jpg" /></p><p>“Analog meters are very nice to look at and easy to read but they are expensive and require much space. So why not replace it by a TFT? When it comes to build a case for your project it turns …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/smart-christmas-tree.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_SmartChristmasTree_t.jpg" /></p><p>“Phone and Alexa Controlled RGB Christmas Tree Lights with WS2811 LEDs and ESP32 Greetings, DIY enthusiasts and tech aficionados! Get ready to embark on a thrilling hackster project that will revolutionize your holiday season. Imagine the enchantment of controlling vibrant …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/smart-coaster-with-arduino-nano-33-iot.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_SmartCoasterWithArduinoNano33I_t.jpg" /></p><p>“Introducing the Smart Coaster: Where Elegance Meets Innovation! Control LEDs seamlessly through Arduino Cloud for a cool DIY experience Greetings, DIY enthusiasts and tech aficionados! Today, I’m thrilled to present a project that seamlessly blends elegance and innovation – a …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/smart-door-lock.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_SmartDoorLock_t.jpg" /></p><p>“Smart Dooor Lock System with Arduino, Using 4x4 keypad and solenoid lock Elevate your home security with our ‘Smart Door Lock’ project, integrating Arduino, a keypad, and a solenoid lock. Transform a traditional door into a modern, keyless entry system …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/smart-door-lock-with-esp32-and-blues-notecard.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_SmartDoorLockWithEsp32AndBlues_t.jpg" /></p><p>“Create a smart door lock that utilises BLE for local unlocking and a mobile app integrated with Blues Notecards for remote unlocking. Building a smart door lock has been on my to-do list for the longest time. Many DIY smart …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/smart-solar-plant.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_SmartSolarPlant_t.jpg" /></p><p>“Artificial plant with environmental monitoring India faces significant challenges related to air pollution, with several cities consistently ranking among the most polluted in the world. Among these, a few stand out as particularly affected by high levels of air pollutants …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/solar-e-ink-weather-station-2.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_SolarEInkWeatherStation_t.jpg" /></p><p>“A little solar-powered E-Ink weather station that fits in a window frame. A new project is up and running! During the last couple of months, I have been working on a power-efficient and small form factor weather station. I designed …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/son-of-anything-to-clock-lm311-lower-parts-count.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_SonOfAnythingToClockLm311Lower_t.jpg" /></p><p>“Last post I described a subcircuit that would take an audio signal from maybe 50K to below audible frequencies and turn it into a square wave—useful for turning audio into a clock signal for an MPU. It worked, but …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/soundweaver.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_Soundweaver_t.jpg" /></p><p>“The intertwining of a human’s senses is a beautiful art. Film, cinema, and theater mix sight and sound in ways that affect how we feel emotionally in a significant way. The music we hear during a scene drastically affects …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/spatial-desktop-clock.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_SpatialDesktopClock_t.jpg" /></p><p>“Perception of time is really an amazing and fascinating topic. Often we see analog clocks and get a feeling “Are we stuck in a loop going round and round”?, though in reality time is flowing continuously. Inspired from this, I …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/square.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_Square_t.jpg" /></p><p>“Real time control of a many solenoids. As I designed an self-designed PCB(MCP23017 IO Expander for 16 solenoids on 1 board) to control a large number of solenoids and built an enclosure to house 100(10x10) solenoids. Then I …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/ssd1306-cat-eyes-gif.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_Ssd1306CatEyesGif_t.jpg" /></p><p>“A simple tutorial on how to use SSD1306 for displaying moving GIFs, in this case, cat eyes. For those of you who are experiencing issues with the animation on the SSD1306 OLED display, here is a short tutorial. Two SSD1306 …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/t3rminal-3d-printed-cyberdeckmobile-pc.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_T3Rminal3DPrintedCyberdeckMobi_t.jpg" /></p><p>“The T3rminal is a CyberDeck that I’ve been working on for the past couple of months and wanted to make it open source. I took inspiration from different devices such as the Decktility, YARH, and other projects. you can …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/talking-to-memory-inside-the-intel-8088-processors-bus-interface-state-machine.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_TalkingToMemoryInsideTheIntel8_t.jpg" /></p><p>“In 1979, Intel introduced the 8088 microprocessor, a variant of the 16-bit 8086 processor. IBM’s decision to use the 8088 processor in the IBM PC (1981) was a critical point in computer history, leading to the success of the …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/tcp-tunnel-over-can-bus-fd-with-raspberry-pi.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_TcpTunnelOverCanBusFdWithRaspb_t.jpg" /></p><p>“A TCP tunnel over CAN bus FD (Flexible Data-rate) involves encapsulating TCP/IP packets within CAN FD frames to enable communication between TCP/IP networks using the CAN FD physical layer. Implementing a TCP tunnel over CAN bus FD can …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/the-oracle-9000-fountain.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_TheOracle9000Fountain_t.jpg" /></p><p>“The Oracle 9000 Fountain Environment System is a smart Home Device that creates Tranquil environment with Water, Soundscapes & Lighting. The Oracle 9k Fountain was designed to fulfill a need in home wellness. As modern humans, our lives get increasingly more …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/the-simplest-way-to-determine-the-quality-of-lighting.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_TheSimplestWayToDetermineTheQu_t.jpg" /></p><p>“This way of checking the quality of lighting in our home, or anywhere else, is extremely simple, cheap, and mobile Light flickering can be a common issue and may occur with various types of bulbs, including incandescent, fluorescent, and LED …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/ultra-compact-lidar-distance-meterrange-finder.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_UltraCompactLidarDistanceMeter_t.jpg" /></p><p>““tiny LiDAR laser range finder ” anUltra Compact LiDAR Distance Meter/Range Finder Story I am a big fan of OLED displays. If you look at my recent projects, you can see that most of them feature OLED displays. While researching …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/upcycled-atx-build-your-own-lab-bench-power-supply.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_UpcycledAtxBuildYourOwnLabBenc_t.jpg" /></p><p>“Welcome to this comprehensive DIY guide where we transform a standard ATX power supply unit (PSU) into a versatile and customizable lab bench power supply. This project is perfect for electronics enthusiasts, hobbyists, and students who need a reliable and …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/vhs-cassette-video-recorder.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_VhsCassetteVideoRecorder_t.jpg" /></p><p>“A fun mini-project to cram a Raspberry Pi-based composite video player/recorder inside a VHS cassette. The VHS cassette was a popular video recording medium for decades but is rarely used today. When I needed a simple composite video player …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/voice-controlled-dht11-with-dfrobot.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_VoiceControlledDht11WithDfrobo_t.jpg" /></p><p>“Will guide you to visualize the DHT11 data via voice commands. In this tutorial, I will guide you on how to create a temperature and humidity monitoring system that can be controlled by voice using a FireBeetle and a DHT11 …</p>

2024-05-30T00:00:00+01:002024-05-30T00:00:00+01:00João Alvestag:jpralves.net,2024-05-30:post/2024/05/30/wireless-microphone-with-esp8266-and-esp32-arduino.html

<p><img alt="" src="https://jpralves.net/imgt/2024/05/PM447_WirelessMicrophoneWithEsp8266A_t.jpg" /></p><p>“This article is about how Wireless Microphone works. This is a firmware project Arduino source code (.ino files) for ESP8266 and ESP32 WiFi modules. With this firmware, you can have online audio stream and optionally the modules will be able …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/arduino-fft-audio-spectrum-analyzer-on-8x32-color-matrix-ws2.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_ArduinoFftAudioSpectrumAnalyze_t.jpg" /></p><p>“This is an extremely simple, but still visually very effective project, and can serve as a gadget on your desktop The spectrum analyzer displays the amplitude of signals as a function of frequency, allowing engineers and technicians to visualize and …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/arduino-nano-personal-computer-squeezing-water-from-a-stone.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_ArduinoNanoPersonalComputerSqu_t.jpg" /></p><p>“I am pushing the limits of how much compute you can get out of an Arduino Nano: - 320x200 pixels of monochrome VGA output (optional: 16 row colors) - PS/2 keyboard readout - requires only 1(!) logic IC 74HC166”</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/arduino-uno-gear-indicator-for-manual-transmission-using-hall-sensors.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_ArduinoUnoGearIndicatorForManu_t.jpg" /></p><p>“Learn how to create a simple gear indicator for the manual transmission of the car. For that, we will use Arduino UNO with SSD1306 128x64px IIC OLED screen and 4 Hall Sensors to measure the magnetic field of the magnet …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/avr-iot-bird-watch.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_AvrIotBirdWatch_t.jpg" /></p><p>“A bird feeder with bird classification machine learning elements for alerting in the event of unique bird visits. Story I started this project with an intent to create a machine learning device to alert when dogs entered the dog park …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/build-a-one-handed-soldering-tool-20-effortless-soldering-with-only-one-hand.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_BuildAOneHandedSolderingTool20_t.jpg" /></p><p>“This is the long-awaited Solder Sustainer v2, the predecessor of the well-known Solder Sustainer that I built and designed back in July 2023. This device will allow you to solder with precision while only utilizing one hand, freeing up your …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/build-your-own-wi-fi-signal-strength-meter.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_BuildYourOwnWiFiSignalStrength_t.jpg" /></p><p>“Boost IoT Connectivity with a C3mini-based Signal strength meter! Enhancing IoT Connectivity monitoring by building a Wi-Fi Signal Strength checker with C3mini Introduction: In today’s interconnected world, a strong Wi-Fi signal is the backbone of seamless communication and connectivity …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/building-a-usb-snes-controller.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_BuildingAUsbSnesController_t.jpg" /></p><p>“A few years ago on a trip to Tokyo, we took a day to explore Akihabara. We found a shop that was selling retro gaming stuff and when I saw an old SNES controller for sale I had to buy …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/classic-style-arduino-weather-station-with-three-oled-disp.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_ClassicStyleArduinoWeatherStat_t.jpg" /></p><p>“This is a very simple, visually effective, but also very useful device that accurately displays the three basic meteorological parameters. So far I have made several weather stations that display local values as well as internet data, which you can …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/cohart-12-silent-alarm.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_Cohart12SilentAlarm_t.jpg" /></p><p>“In a world where anything can take place, Now you can safeguard any part of your home and be notified by text or email. This is a basic way to provide a sense of security to your mind. If you …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/create-a-star-wars-game-using-esp8266-a-beginners-guide.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_CreateAStarWarsGameUsingEsp826_t.jpg" /></p><p>“This guide demonstrates how to craft a Star Wars game with the ESP8266, OLED Display, and Joystick Module. Delving into the realm of classic gaming, this guide demonstrates how to craft a Star Wars game with the ESP8266,OLED Display …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/creating-a-low-cost-ev-charging-station-with-arduino.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_CreatingALowCostEvChargingStat_t.jpg" /></p><p>“The high cost of EV (electric vehicle) chargers may lead you to believe that they’re complex systems. But with the exception of Tesla’s Supercharger, that isn’t true. They’re actually quite simple — basically just glorified switches. All …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/dc-motor-position-control-with-potentiometer-for-robotic-arm.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_DcMotorPositionControlWithPote_t.jpg" /></p><p>“Replacing servos with DC motors + potentiometers for precise, cost-effective robotic arm control. Circuit Connections - Connect the potentiometers to analog input pins of the L293D Shield or Arduino board. The pins are A0, A1, A2, and A3, with the positive and …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/digital-hourglass.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_DigitalHourglass_t.jpg" /></p><p>“To be honest: If you’re not working, you don’t really need an exact time: it’s about afternoon, I’m hungry, I’m tired, it’s time to go to bed. And in the morning, the alarm clock …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/diy-pocket-pong.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_DiyPocketPong_t.jpg" /></p><p>“Hi, I am Athul, studying 9th grade and about to enter 10 grade. I have always been a fan of retro gaming. Also, kids like me are now tired of boring mobile games. there is a trend of people being …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/door-closing-robot-for-zoom-meetings.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_DoorClosingRobotForZoomMeeting_t.jpg" /></p><p>“Working from home can be full of noise and distractions. Now, when I join a Zoom meeting, this robot closes my office door! Why I built it Working from home can be full of noise and distractions. If I remember …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/explore-simple-3d-dog-robot-and-multiple-servo-motor-control.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_ExploreSimple3DDogRobotAndMult_t.jpg" /></p><p>“In this project, you will find 3D part assembly, source code, and Android application of a simple dog model robot. Hi there! In this project, you will find 3D part assembly, source code, and Android application of a simple dog …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/filmolino-slidescanner.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_FilmolinoSlidescanner_t.jpg" /></p><p>“The Filmolino SlideScanner is a device that makes it easy to scan slides in magazines fully automated using a modified slide projector and a digital camera. It controls the slide projector and a digital camera using a cable release or …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/grow-the-opensource-soil-meter-project.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_GrowTheOpensourceSoilMeterProj_t.jpg" /></p><p>“Made a custom Handy soil meter that we can carry around for measuring soil moisture level. This is GROW, an open-source, easy-to-build soil monitor setup that comprises an XIAO expansion board paired with a soil moisture sensor. The values obtained …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/hexaclock-led-hexagon-wall-clock.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_HexaclockLedHexagonWallClock_t.jpg" /></p><p>“The HexaClock is a hexagon-shaped LED matrix with each pixel also in the shape of a hexagon! This clock will pour colors onto your wall. There are only 5 parts to be printed. You need a printer with at least …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/hid-numpad-with-xiao-samd21.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_HidNumpadWithXiaoSamd21_t.jpg" /></p><p>“Made a compact NUMPAD project using the XIAO SAMD21 and XIAO Expansion Board. Here’s something fun and useful: an HID Numpad projectmade completely from scratch using an XIAO expansion board and 3D-printed parts. The heart of this project is …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/how-to-make-simple-portable-pemf-magnetic-pulser.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_HowToMakeSimplePortablePemfMag_t.jpg" /></p><p>“This is a miniature, cheap and easy to make portable PEMF Therapy device that you can make yourself for just a few dollars. Story PEMF (Pulsed Electromagnetic Field Therapy), which is also known as magnetic pulse therapy uses electromagnetic fields …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/inside-an-unusual-7400-series-chip-implemented-with-a-gate-array.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_InsideAnUnusual7400SeriesChipI_t.jpg" /></p><p>“When I look inside a chip from the popular 7400 series, I know what to expect: a fairly simple die, implemented in a straightforward, cost-effective way. However, when I looked inside a military-grade chip built by Integrated Device Technology (IDT …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/intel-8051-as-arduino-uno.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_Intel8051AsArduinoUno_t.jpg" /></p><p>“I made this really amazing PCB for INTEL 8051 microcontroller in the form factor of an Arduino UNO. See how to build your own one. Hello Guys, Once again I have made a microcontroller Development board but this time we …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/led-vu-meter-music-reactive-light.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_LedVuMeterMusicReactiveLight_t.jpg" /></p><p>“VU- meter using Arduino and sound sensor Hey folks, we are making a sound reactive light using arduino and sound sensor. which is also known as the LED VU meter. to make this project we need a analog Sound sensor …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/make-a-simple-3d-hollow-clock-arduino-nano-and-5v-stepper.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_MakeASimple3DHollowClockArduin_t.jpg" /></p><p>“Hi, in this project I will show you how I made this great-looking 3D-printed Hollow clock. Hi, in this project I will show you how I made this great-looking 3D-printed Hollow clock. I saw this project on Thingiverse a few …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/one-handed-chording-keyboard.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_OneHandedChordingKeyboard_t.jpg" /></p><p>“Two hands are required to type on a regular keyboard. A mouse needs one hand to operate. This results in needing to move a hand between the mouse and keyboard often, which gets tiring. To solve this problem, I designed …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/pulse-oximeter-with-max30105-nodemcu-and-an-ssd1306-oled-screen.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_PulseOximeterWithMax30105Nodem_t.jpg" /></p><p>“In today’s project, I tried to build my own pulse monitor that measures my heart rate in beats per minute (bpm) but also monitors the oxygen saturation levels in my blood, using an MAX30105 oximeter sensor coupled with an …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/secret-maze-2.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_SecretMaze2_t.jpg" /></p><p>“This simple project, based on an ATtiny85, gives you a maze that you have to solve by navigating it with four push buttons. The available paths in each direction are shown by four LEDs: a lit LED means that your …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/sen6-pdu-a-smart-power-distribution-unit.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_Sen6PduASmartPowerDistribution_t.jpg" /></p><p>“In most cases, when we talk about a PDU we generally mean a box that can power multiple devices at the same time from a single power source. A sort of “multi-socket” with the only advantage of concentrating the cables …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/set-a-ds3231-rtc-over-bluetooth.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_SetADs3231RtcOverBluetooth_t.jpg" /></p><p>“An easy way to set a DS3231 RTC module connected to a device with BLE (esp32 perhaps) using an app on an Android phone. Story It can be difficult to set the time and date on a DS3231 RTC there …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/sign-language-translator-spectacle.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_SignLanguageTranslatorSpectacl_t.jpg" /></p><p>“A wearable Sign Language Translator powered by the VIAM and Raspberry Pi. Story In a world where communication barriers persist for individuals unable to speak, sign language stands as a vital means of expression. However, the necessity of a third-party …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/simulation-steering-wheel-controller.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_SimulationSteeringWheelControl_t.jpg" /></p><p>“I grew up playing Mario Kart Wii and fell in love with racing games when I was a kid. When I graduated to playing the arcade version I wanted a steering wheel to use at home that included all the …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/single-axis-joystick-controller-with-arduino.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_SingleAxisJoystickControllerWi_t.jpg" /></p><p>“I created a DIY controller box using single-axis joystick modules and Arduino Nano to control an RGB LED, servo motor, and stepper motor! In this project, I demonstrate three different use cases for single-axis joysticks with an Arduino Nano microcontroller …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/soundbox.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_Soundbox_t.jpg" /></p><p>“SoundBox is a 3D Printed Portable Bluetooth Speaker system, It also contains an RGB Board powered by Pico for aesthetics. The goal was to put together a powerful Bluetooth sound system for my desk to replace the sound speaker project …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/stirling-engine-for-every-one.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_StirlingEngineForEveryOne_t.jpg" /></p><p>“Instructions for building a simple Stirling engine. Suitable for everyone! A few ordinary objects are enough. A little skill, patience and a little time. Supplies Materials: - Tin Can 98 x 38 mm - 3d printed parts - Thin latex glove - Steel wire …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/synesthetic-clock.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_SynestheticClock_t.jpg" /></p><p>“A person with synesthesia may associate certain letters and numbers with certain colors. The principle of an Arduino RTC clock is old and has been described many times. But this display is new. The hours and minutes are shown on …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/temperature-card.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_TemperatureCard_t.jpg" /></p><p>“The Temperature Card is a wearable XIAO and SSD1306-based device that displays the current temperature using an SHT40 sensor. Story Here’s something cool: The TEMPERATURE CARD The project is a wearable ID card-like device that has an OLED …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/testing-2500w-large-induction-heater.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_Testing2500WLargeInductionHeat_t.jpg" /></p><p>“This induction heater can be used with graphite crucible for smelting gold, silver, copper, aluminum and other metals. An induction heater is a device that uses electromagnetic induction to heat objects. It consists of a coil of wire through which …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/the-intel-8088-processors-instruction-prefetch-circuitry-a-look-inside.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_TheIntel8088ProcessorSInstruct_t.jpg" /></p><p>“In 1979, Intel introduced the 8088 microprocessor, a variant of the 16-bit 8086 processor. IBM’s decision to use the 8088 processor in the IBM PC (1981) was a critical point in computer history, leading to the dominance of the …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/the-smart-jalapeno.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_TheSmartJalapeno_t.jpg" /></p><p>“The Smart Jalapeno: Your urban oasis, bringing fresh produce and companionship together in one smart, sustainable package. Ladies and gentlemen, investors and enthusiasts, let me take you on a journey—a journey fueled by a passion for biophilic design, a …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/tiny-internet-clock.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_TinyInternetClock_t.jpg" /></p><p>“In this project, we will build a tiny internet clock connected to your wifi to get time from NTP servers. Supplies: - Seeed Studio XIAO ESP32C3 - 0.91 Inch 128x32 OLED LCD Display - USB C cable - Connecting wires”</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/tsl25911-light-sensor.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_Tsl25911LightSensor_t.jpg" /></p><p>“We will do a step-by-step TSL25911 ambient light sensor design in this project. Story Introduction We interact with different intensities and strengths of light in our daily activities. Therefore, detecting the amount of ambient light we interact with is very …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/unusual-led-ring-arduino-clock-temperature-and-humidity-me.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_UnusualLedRingArduinoClockTemp_t.jpg" /></p><p>“Although this is a very simple Arduino project, it contains more different options, as well as a very intuitive way to show a lot of inform. There are many arduino clock projects with temperature and humidity readings where the results …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/usb-dev-board-for-pic18f14k50.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_UsbDevBoardForPic18F14K50_t.jpg" /></p><p>“Open Source projects where we struggle with engineering, electronics, coding and who knows what else… Night USB is a very small USB dev board for the PIC18F14k50, so hopefully you may find it interesting ;) The PIC18F14k50 is USB-2.0 …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/wall-mounted-minecraft-sword.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_WallMountedMinecraftSword_t.jpg" /></p><p>“Made an enlarged Minecraft sword incorporating RGB lights and an ESP8266 Board. The concept was to create a full-sized Minecraft sword with RGB LEDs fitted in order to create a wall light with a Minecraft theme. This 3D printed light …</p>

2024-04-25T00:00:00+01:002024-04-25T00:00:00+01:00João Alvestag:jpralves.net,2024-04-25:post/2024/04/25/wireless-scoreboard-display-for-drone-soccer-or-other-games.html

<p><img alt="" src="https://jpralves.net/imgt/2024/04/PM446_WirelessScoreboardDisplayForDr_t.jpg" /></p><p>“A portable, wireless LED display panel for showing scores of a Drone Soccer match or any typical match involving two teams or players. What This Project Is About This project was created to be a low-cost and convenient way to …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/6-channel-voltmeter.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_6ChannelVoltmeter_t.jpg" /></p><p>“In this project, we are making a 6-channel voltmeter that has 6 voltage dividers and an OLED screen that will show the reading from the diff Some special applications often have to measure the voltage from several parts at the …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/arduino-all-in-one-robot.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_ArduinoAllInOneRobot_t.jpg" /></p><p>“Experience the Arduino All-in-One Robot, equipped with Bluetooth, IR remote, voice control, obstacle avoidance, and hand follower. Meet my Arduino All-in-One Robot: a super cool creation with Bluetooth, voice, and remote control. It avoids obstacles, follows your hand, and shines …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/arduino-fft-spectrum-analyzer-on-vfd-display-gp1287.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_ArduinoFftSpectrumAnalyzerOnVf_t.jpg" /></p><p>“How to make an audio FFT spectrum analyzer on a 256x50 pixel VFD display. An audio spectrum analyzer is a device that visualizes the frequency content of an audio signal. It represents the distribution of frequencies in a graphical form …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/arduino-reaction-time-game.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_ArduinoReactionTimeGame_t.jpg" /></p><p>“Test your reaction time with this simple fast-paced button pressing game! I built a reaction time game using an Arduino Nano! Here’s the project: How to build? The build is really easy to set up. Starting with the buttons …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/arduinostepper-microscope-z-stage-keypress-emulation.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_ArduinoStepperMicroscopeZStage_t.jpg" /></p><p>“Automation of a microscope Z-stage by Arduino + stepper 28BYJ48, controlled by serial dialogue, with emulated keypress after each movement. To understand the meaning of this project, you should be confident with the concepts of focus stacking in macrophotography or photomicrography …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/automated-ha-fish-tank-design-based-on-seeed-xiao-esp32s3-se.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_AutomatedHaFishTankDesignBased_t.jpg" /></p><p>“Automatic feeding; Environmental monitoring (including temperature, humidity, water quality); Real-time video monitoring; Remote management In today’s era of the Internet of Things and smart home technology, it has become an innovative trend to integrate advanced technology and traditional fish …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/automated-plants-watering-system.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_AutomatedPlantsWateringSystem_t.jpg" /></p><p>“Imagine a setup where technology integrates effortlessly with nature, allowing you to take control of your plant care routine. In the world of do-it-yourself (DIY) projects, few activities match the practicality of constructing your own Arduino-powered automatic watering system. Imagine …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/autoscaling-signal-conditioner-for-your-arduino-oscilloscope.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_AutoscalingSignalConditionerFo_t.jpg" /></p><p>“Designed to Work with Signals up to 2 MHz, it should work with your Arduino Oscilloscope In a recent posting, I presented a 2 MHz oscilloscope using the Arduino Giga. I used a very simple arrangement to scale and condition …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/breathing-mechanism-for-animatronic-puppets-companion-bots.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_BreathingMechanismForAnimatron_t.jpg" /></p><p>“Simulate realistic breathing inside your puppet or animatronic companion bot. I’m building a companion bot (related projects: Animatronic Fox Head) and wanted to add some movement to the body as well to help it feel more life like. I …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/building-a-basic-esp32-web-server-controlling-leds.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_BuildingABasicEsp32WebServerCo_t.jpg" /></p><p>“Learn how to set up an ESp32 webserver and control LEDs using a web interface. Let’s learn how to build a webserver using an ESP32 and use that to control various peripherals. Instead of using a computer, we will …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/building-a-colorful-led-matrix-display-with-ws2812b.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_BuildingAColorfulLedMatrixDisp_t.jpg" /></p><p>“In this project, we’ll guide you through building a colorful LED matrix display using WS2812B modules. Circuit Design 1. Connect WS2812B Modules: Connect the data input (DI) of each WS2812B module to a digital pin on the Arduino (e …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/building-gates-with-the-avr-event-system.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_BuildingGatesWithTheAvrEventSy_t.jpg" /></p><p>“This article shows how to use the AVR Event System to make buffers or inverters in the DA, DB, DD, EA, or EB series microcontrollers, and gives some practical examples, such as a simple Blink application Introduction If you’re …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/chromadome-a-hemispherical-decorative-lamp.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_ChromadomeAHemisphericalDecora_t.jpg" /></p><p>“This project is about building a hemispherical LED lamp that can be used as a decorative piece or for ambient lighting. The LEDs are arranged in a pattern to create a visually appealing effect. The semi-transparent shell diffuses the light …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/connect-xiao-esp32-c3-with-the-dht11-via-i2c.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_ConnectXiaoEsp32C3WithTheDht11_t.jpg" /></p><p>“DIY smart home device based on XIAO ESP32C3 connecting DHT11 sensor and an OLED display to monitor humidity and temperature. Connect XIAO ESP32 C3 with the DHT11 via I2C Introduction: Creating your gadgets not only empowers you but also adds …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/controller-with-menu.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_ControllerWithMenu_t.jpg" /></p><p>“You can control either the LED or the motor with the menu-controlled device I developed. Thanks to the menus on the screen, you can offer multiple options to the device you control. The device in the example is a motor …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/designing-a-low-noise-audio-amplifier-with-2n3906.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_DesigningALowNoiseAudioAmplifi_t.jpg" /></p><p>“In this project, we’ll guide you through designing a low-noise audio amplifier using the 2N3906 transistor. Circuit Design: 1. Biasing Circuit: Connect the emitter (E) of the 2N3906 transistor to the ground. Connect a resistor (RE) from the emitter …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/differential-drive-robot-using-ros2-and-esp32.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_DifferentialDriveRobotUsingRos_t.jpg" /></p><p>“Differential drive robot using ROS2, micro-ROS and ESP32 In this project, we had build a differential drive robot using EPS32 microcontroller. ROS2 humble is used for controlling the robot. Micro-ROS is uses for connecting ESP32 to ROS2 running …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/digital-geneva-clock.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_DigitalGenevaClock_t.jpg" /></p><p>“A simple digital clock with sequential Geneva drives. - Easy time adjustment using sliding mechanism to release the engagement of Geneva drives - Easy to make with only 9 printed parts - Driven by a single motor - Easy to print without support structure …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/diy-extremly-sensitive-and-cheap-arduino-seismometer.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_DiyExtremlySensitiveAndCheapAr_t.jpg" /></p><p>“Continuation of the previous project, now presenting the electronic part, which together with the Geophone sensor will represent a complete A seismometer, is an instrument used to detect and record ground motion caused by seismic waves, such as those generated …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/diy-garage-door-opener-using-arduino-a-beginners-guide.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_DiyGarageDoorOpenerUsingArduin_t.jpg" /></p><p>“In this article, we’ll delve into the exciting realm of simulating a garage door opener using Arduino. Embarking on the journey of learning Arduino opens up a world of possibilities for enthusiasts to create innovative projects. In this article …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/diy-pc-controlled-high-power-pemf-therapy-device.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_DiyPcControlledHighPowerPemfTh_t.jpg" /></p><p>“This is a PEMF signal amplifier and not a complete PEMF device, but therefore it can be connected to various sources of such a signal. PEMF or Pulsed Electromagnetic Field therapy is a type of therapy that uses electromagnetic fields …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/diy-simple-spark-gap-tesla-coil.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_DiySimpleSparkGapTeslaCoil_t.jpg" /></p><p>“Simplest type of Tesla Coil that produces high-voltage, low-current, and high-frequency alternating-current electricity. Tesla coil is a type of resonant transformer circuit invented by Nikola Tesla around 1891. It is a high-frequency air-core transformer that produces high-voltage, low-current, and high-frequency …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/diy-thermal-camera.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_DiyThermalCamera_t.jpg" /></p><p>“DIY Thermal Camera: Build your Own Infrared Imaging Device with ESP32 and MLX90640 Sensor Ditch X-ray vision, thermal cameras are the real industrial superheroes! They don’t just see light, they see heat, making them masters of uncovering hidden energy …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/diy-thermometer-with-ttgo-t-display-and-ds18b20-v2.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_DiyThermometerWithTtgoTDisplay_t.jpg" /></p><p>“Version 2 of a previously made Thermometer project. Here’s something useful: A DIY thermometer made completely from scratch using a custom PCB and a couple of 3D-printed parts. The DS18B20 temperature sensor probe and the TTGO T-display board form …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/easy-arduino-alarm-clock-w-matrix-display.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_EasyArduinoAlarmClockWMatrixDi_t.jpg" /></p><p>“A functioning alarm clock with an easily adjustable alarm time, a matrix display, and a nice case to go with it! So, it’s a clock. oh my god whaaaat Yeah, there’s not much to say about the finished …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/easy-environment-monitor.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_EasyEnvironmentMonitor_t.jpg" /></p><p>“Simplest of the simple. Uses an Arduino UNO, but could be used with other boards. So, I made an Environment Monitor. What does it do? - Measures Temperature (in F) - Humidity (in %) - Barometric Pressure (in mb) - Time since code first ran …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/generate-qr-codes-with-arduino-on-oled-display.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_GenerateQrCodesWithArduinoOnOl_t.jpg" /></p><p>“Generate QR codes!!! In this tutorial I will show you how to generate QR codes and display them on tiny OLED display. This standard of 2D codes is incredibly popular and widely used. The best part? I found Arduino support …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/helmut.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_Helmut_t.jpg" /></p><p>“The safety device for your helmet. It registers when your helmet falls too heavy and warns you that the structure might be damaged. Helmets are subjected to drops and collisions during various activities, and the resulting internal damage might not …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/high-power-three-channel-led-driver.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_HighPowerThreeChannelLedDriver_t.jpg" /></p><p>“This project is a complete design of a high-power three-channel LED driver board, designed in KiCAD, and all the fabrication files Introduction I have been thinking about how to drive RGB LED patterns most simply. In my day-to-day research, I …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/how-to-make-em84-6e2-vacuum-tube-stereo-vu-meter.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_HowToMakeEm846E2VacuumTubeSter_t.jpg" /></p><p>“This VU meter is very sensitive, has great dynamics, and the response time is instantaneous. A VU meter, also known as a Volume Unit meter, is a device used to display the audio signal level in real-time. This time I …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/human-heart-simulation-using-electronics.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_HumanHeartSimulationUsingElect_t.jpg" /></p><p>“A Simple working human heart model with electronics for visualization of arrhythmia. The main objective of this project is to teach students how the human heart functions. The heart has 4 chambers and 4 valves: Right Atrium, Left Atrium, Right …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/ili9341-pattern-lock-algorithm.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_Ili9341PatternLockAlgorithm_t.jpg" /></p><p>“How to realize a pattern lock algorithm as in your smart phone for ili9341 touch screens and Arduino IDE Most people are familiar with pattern lock entries from their smart phone, e.g. for unlocking the phone. Such an unlocking …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/iot-based-home-automation-with-google-home-alexa.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_IotBasedHomeAutomationWithGoog_t.jpg" /></p><p>“How to make a FREE IoT-based Home Automation with Google Assistant & Alexa using ESP32. (Circuit + Code) In this ESP32 project, I have shown how to make an IoT-based Home Automation with Google Assistant & Alexa using ESP32 to control 3 home …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/iot-based-monitoring-and-safeguarding-of-poultry-chickens.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_IotBasedMonitoringAndSafeguard_t.jpg" /></p><p>“Design of IoT-Based Monitoring And Safeguarding of Chickens in Poultry From Illness, This project presents an innovative IoT-based solution for monitoring and managing the health of chickens in a poultry farm, as demonstrated in the provided YouTube video. The system …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/led-matrix-earrings.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_LedMatrixEarrings_t.jpg" /></p><p>“I originally imagined the LED Industrial Piercing as a project specifically to make use of 0201 LEDs. In the end, they weren’t even necessary. 0201 LEDs are just too small! Evidently, we needed to go deeper, so the purpose …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/never-miss-a-meeting.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_NeverMissAMeeting_t.jpg" /></p><p>“The wearable ring that changes colors to alert you of meetings - green for upcoming, red for ending. Stay ahead! Imagine this: You’re working from home 🏠, deeply immersed in your tasks, when suddenly, you miss an important meeting - again 📅. Enter …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/nodeguard-wioterminal-mqtt-air-quality-monitor.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_NodeguardWioterminalMqttAirQua_t.jpg" /></p><p>“Transforming air quality monitoring with cutting-edge technology. Our system combines advanced sensors and real-time analytics for proactive Inspired by the recent fire outbreak at the solid waste dumpsite in Brahmapuram, Kochi, this project emerges as a comprehensive solution not only …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/perpetual-wristwatch.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_PerpetualWristwatch_t.jpg" /></p><p>“The simple and “Perpetual” WristWatch(“LumiTime”) with 12 red LEDs, it have LIR2430 Li-Ion battery, 12 solar cells, based on Microchip CPU. The simple and “Perpetual” WristWatch(project code name “LumiTime”) with 12 red LEDs, it have LIR2430 Li-Ion battery …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/petgps.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_Petgps_t.jpg" /></p><p>“A LoRa connected harness equipped with various sensors to improve your pet’s life Did you ever wonder about the whereabouts of your dog ? Staying up late because your cat thought it would be a great idea to jump out …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/pico-powered-dc-fan-driver.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_PicoPoweredDcFanDriver_t.jpg" /></p><p>“Made a Raspberry Pi Pico powered DC 12V-5V FAN Driver So here’s something cool: a 5V to 12V DC motor driver based around a Raspberry Pi Pico Board and a couple of electronic components. The Raspberry Pi Pico is …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/pid-position-control-of-a-levitating-balsa-disc-assembly.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_PidPositionControlOfALevitatin_t.jpg" /></p><p>“The PID Position Control of a levitating balsa disc assembly inside a 500ml graduated cylinder is a system designed to teach process control The PID Position Control of a levitating balsa disc assembly inside a 500ml graduated cylinder is a …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/pocket-temp-meter.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_PocketTempMeter_t.jpg" /></p><p>“A small handy pocket TEMP Meter made from ESP32C3 driven MCU paired with an SSD1306 128x32-pixel screen, AHT10 is being used to take TEMP. So here’s something portable and useful: the Pocket TEMP Meter project. As the name suggests …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/portable-space-trash-game-console.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_PortableSpaceTrashGameConsole_t.jpg" /></p><p>“I made a handheld game console that runs OG SPACE TRASH GAME using an XIAO expansion board. Here’s something fun: a portable pocket game console that incorporates an XIAO ESP32C3, an XIAO Expansion board, and some custom 3D printed …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/practical-guide-to-pcf8574-adding-extra-pins-for-arduino.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_PracticalGuideToPcf8574AddingE_t.jpg" /></p><p>“Add extra 8 pins to Arduino ! Discover an easy way to add more GPIO pins to your Arduino with the PCF8574 in this tutorial. We’ll explore how it can be a handy alternative to other methods like shift registers …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/reggaeton-be-gone.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_ReggaetonBeGone_t.jpg" /></p><p>“Your neighbor loves to blast Reggaeton music at full volume every morning at 9 am. Could this be an opportunity for an AI device? Consider this scenario: Your wall-to-wall neighbor loves to blast Reggaeton music at full volume through a …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/retro-internet-radio-using-esp32.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_RetroInternetRadioUsingEsp32_t.jpg" /></p><p>“Several years ago, I crafted an FM radio using the compact RDA5807M module, a tuner that delivered FM radio in a small package. While it functioned well and brought enjoyment to the entire family, the reception was subpar. I resorted …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/reverse-engineering-standard-cell-logic-in-the-intel-386-processor.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_ReverseEngineeringStandardCell_t.jpg" /></p><p>“The 386 processor (1985) was Intel’s most complex processor at the time, with 285,000 transistors. Intel had scheduled 50 person-years to design the processor, but it was falling behind schedule. The design team decided to automate chunks of …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/single-arm-scara-plotter-with-homing.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_SingleArmScaraPlotterWithHomin_t.jpg" /></p><p>“About 3 years ago, I made my own a simple robot arm and published it at: https://www.instructables.com/DIY-SINGLE-ARM-SCARA-ROBOT/. Until now, many people, especially students continued to ask me questions about how to “HOMING …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/tiny-motion-detection-alarm.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_TinyMotionDetectionAlarm_t.jpg" /></p><p>“Hi, in this project, we are going to make a motion detection alarm with IMU 6050, it is a 3-axis Accelerometer and Gyro Sensor module. By using this, if a small movement is detected by the IMU, it will trigger …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/ultra-low-power-single-push-button-onoff-controller.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_UltraLowPowerSinglePushButtonO_t.jpg" /></p><p>“Ultra-Low Power Single push button ON/OFF controller based on ATTiny13/13A/25/45/85 for other microController and circuits application. TTiny13/13A/25/45/85 Push Button ON/OFF Controller Ultra-Low Power Single push button ON/OFF controller based …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/universal-arduino-staccato-controller-for-tesla-coils.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_UniversalArduinoStaccatoContro_t.jpg" /></p><p>“Staccato Controller (interrupter) was developed in the attempt to create longer sparks from Tesla Coil reducing the input power. The VTTC Staccato Controller was developed in the attempt to create longer sparks from VTTCs while at the same time reducing …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/vegetative-state-self-watering-houseplant.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_VegetativeStateSelfWateringHou_t.jpg" /></p><p>“A houseplant that waters itself when the soil is dry. It also collects environmental data and sends that to the cloud for interpretation. I was tasked with creating a self watering houseplant. When the soil moisture sensor detects that the …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/wake-pc-box-wake-on-lan-packet-transmitting-box.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_WakePcBoxWakeOnLanPacketTransm_t.jpg" /></p><p>“This is the small control box that can wake up the PC using Wake On LAN. You can just push a button, PCs will wake up from the power off. Every morning I had to press the power button at …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/ws2812b-rgb-led-controller-with-esp8266-via-wifi.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_Ws2812BRgbLedControllerWithEsp_t.jpg" /></p><p>“Create your WiFi WLED controller for WS2812B LEDs using ESP8266. WS2812b addressable RGB LEDs are devices widely used in lighting projects. They are found in the format of LED matrices and strips. LED strips, for example, are widely used in …</p>

2024-03-21T00:00:00+00:002024-03-21T00:00:00+00:00João Alvestag:jpralves.net,2024-03-21:post/2024/03/21/xiao-esp32c3-as-modbus-tcp-client-to-read-holding-register.html

<p><img alt="" src="https://jpralves.net/imgt/2024/03/PM445_XiaoEsp32C3AsModbusTcpClientTo_t.jpg" /></p><p>“How to Build Modbus TCP/IP Client with XIAO ESP32C3 to Read Holding Registers Data from Modbus TCP/IP Devices Modbus is a widely used communication protocol in industrial automation for interfacing various electronic devices. In this tutorial, we will …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/230v-ac-to-15v-dc-pcb-for-your-application.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_230VAcTo15VDcPcbForYourApplica_t.jpg" /></p><p>“The project is about how to convert 240V AC input power to 1.5V DC output power for your application. A power management integrated circuit (PMIC) is utilized to supply the necessary power to complex electronic circuits. Designing a primary …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/arduino-buttonless-led-matrix-clock-with-adxl335-sensor.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_ArduinoButtonlessLedMatrixCloc_t.jpg" /></p><p>“Multimode Arduino Matrix Clock, Word Clock, Thermometer, and Random Word Generator controlled by various motions. This time I will describe to you a way to make an interesting clock on an 8x8 Led matrix, that does not contain any buttons …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/arduino-interfacing-hx711-load-cell-with-oled-display.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_ArduinoInterfacingHx711LoadCel_t.jpg" /></p><p>“In this article we will learn how to Interface Arduino with HX711 Load cell. HX711 Load cell interfacing with Arduino In this article we will learn how to Interface Arduino with HX711 Load cell. In the last post we will …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/arduino-interfacing-with-calculator.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_ArduinoInterfacingWithCalculat_t.jpg" /></p><p>“In this article we will learn how to Interface Calculator using Arduino Uno Working… Creating a basic calculator using an Arduino microcontroller involves connecting a keypad or other input device, a display, and writing code to perform arithmetic operations.”</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/building-a-high-efficiency-class-d-audio-amplifier-using-mos.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_BuildingAHighEfficiencyClassDA_t.jpg" /></p><p>“We will discuss the Class D amplifier and build a hardware prototype of the amplifier and test its performance. Audio technology has undergone remarkable evolution in recent decades, reshaping how we consume digital media. From classic tube amplifiers to modern …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/connecting-a-mouse-to-an-arduino.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_ConnectingAMouseToAnArduino_t.jpg" /></p><p>“Connecting a mouse to an Arduino is simple. With just a few wires, we can easily integrate it into our Arduino projects. Connecting a mouse to an Arduino is simple. With just a few wires, we can easily integrate it …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/control-robot-arm-with-simple-gestures.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_ControlRobotArmWithSimpleGestu_t.jpg" /></p><p>“Controlling a robot with joysticks or a mobile application is a common practice. However, I like to challenge my students by exploring alternative ways to control robot arm movements, such as using simple hand gestures. In the provided video, it …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/create-your-own-nanoleaf-led-panels.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_CreateYourOwnNanoleafLedPanels_t.jpg" /></p><p>“We all know that NanoLeaf LED panels are quite expensive. However, you can create today’s project at a very affordable price. Materials Let’s start with the things you will need: a 12V power supply, a perfboard, an ESP8266 …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/deaf-link.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_DeafLink_t.jpg" /></p><p>“In a world where communication is the cornerstone of human connection, there exists a gap that separates Deaf people from us. I was profoundly worried about the unhappy lives of Deaf individuals in a busy suburban town and how they …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/diy-16mm-film-digitizer.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_Diy16MmFilmDigitizer_t.jpg" /></p><p>“Preserve memories in under 200 lines of code using an Arduino, Raspberry Pi and an old projector. My project is a 16mm film digitization machine that utilizes an Arduino Uno, Raspberry PI 3, a Raspberry PI HD camera, a Pimoroni …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/diy-games-with-raspberry-pi-pico.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_DiyGamesWithRaspberryPiPico_t.jpg" /></p><p>“Introduction: Welcome to this project where I will be creating an exciting games using MicroPython and Raspberry Pi Pico. In this project, I will connect a joystick controller and an 8x8 LED matrix to the Raspberry Pi Pico to build …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/diy-simple-arduino-247-lightning-monitoring-system.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_DiySimpleArduino247LightningMo_t.jpg" /></p><p>“Simple to build, but powerful system for continuous monitoring of electrical discharges (lightning) A lightning detector is a device or system designed to detect the presence of lightning discharges in the atmosphere. It’s used to monitor and provide warnings …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/diy-simple-arduino-metronome.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_DiySimpleArduinoMetronome_t.jpg" /></p><p>“This is a simple beginner Arduino project with a great visual effect, but also a very useful tool when learning to play a musical instrument. A metronome is a device used in music to help musicians keep a consistent tempo …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/diy-wooden-nanoleaf-light-panels.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_DiyWoodenNanoleafLightPanels_t.jpg" /></p><p>“Hi, I am Giovanni Aggiustatutto and welcome to this Instructable! In this guide we will build some RGB lights to hang on the wall, which have some details that I think are very interesting. In fact, these six wooden hexagons …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/doppler-effect-made-easy.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_DopplerEffectMadeEasy_t.jpg" /></p><p>“Just a small project to demonstrate the Doppler effect using ultrasonic sound and the absolute minimum of components. Let me skip the theory, you can it read elsewhere. Just upload the code and enjoy. Well, of course you need an …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/dual-led-ring-watch.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_DualLedRingWatch_t.jpg" /></p><p>“3D Printed Wall-Mounted NeoPixel LED Clock with NTP Synchronization Description This project is a creative take on a digital clock, utilizing a circular arrangement of NeoPixel LEDs that face towards the wall, casting an ambient glow that visually represents the …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/ech83-guitar-preamplifier-with-tone-control-on-12v-dc.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_Ech83GuitarPreamplifierWithTon_t.jpg" /></p><p>“Simple single tube preamplifier with tone control that includes options for adjusting the bass, midrange, and treble frequencies. A vacuum tube preamplifier is typically used to amplify the signal from a microphone, musical instrument, or other audio source before it …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/eqm_obdweb.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_EqmObdweb_t.jpg" /></p><p>“Introduction A WEB Based or Wifi/BLE (EL327 Compatible) OBDII Dongle Platform using the ESP32 WROVER (16MB) Module An OBDII Dongle using the ESP32 Wrover with built-in SPIFFF memory is used as a CAN BUS OBDII reader and the data …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/esp32-cam-time-lapse-recorder.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_Esp32CamTimeLapseRecorder_t.jpg" /></p><p>“I have updated the “IP Camera” and “Camera Microphone” firmware to the new revision with two new features, esp32-cam time lapse and AVI file export: 1. Time Lapse: this feature lets you to use your esp32-cam module as a time …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/esp32-cheap-yellow-display.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_Esp32CheapYellowDisplay_t.jpg" /></p><p>“There is an ESP32 with a built in 320 x 240 2.8” LCD display with a touch screen called the “ESP32-2432S028R”, since this doesn’t roll of the tongue, I propose it should be renamed the “Cheap Yellow …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/high-resolution-voltage-current-digital-logger.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_HighResolutionVoltageCurrentDi_t.jpg" /></p><p>“This tool provides logging function that gets data on voltage, current and power consumption for 0 to 85V DC. Voltage-Current Logger - High-resolution digital power monitor and logger I wanted a tool to measure the power, voltage, and current values used …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/how-to-make-arduino-led-tester-resistor-calculator.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_HowToMakeArduinoLedTesterResis_t.jpg" /></p><p>“Useful tool for testing, and determining characteristics of LEDs, as well as a calculator for calculating the series resistor. Light Emitting Diode as an electronic component are very often used in electronic devices. There are many different types with specific …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/how-to-make-cnc-drawing-machine.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_HowToMakeCncDrawingMachine_t.jpg" /></p><p>“Hi people, Have you ever thought you could build a CNC machine at your home? I guess most of them would say no. But in this project I will show you how you can make your Own CNC drawing machine …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/how-to-make-sun-tracking-sunflower-robot-using-arduino.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_HowToMakeSunTrackingSunflowerR_t.jpg" /></p><p>“Hello there I’m happy that this project caught your interest, This is a sunflower which you can call an electronic version of an actual sunflower. What does an ordinary sunflower do? It tracks the sun and keeps its face …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/inside-the-intel-386-processor-die-the-clock-circuit.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_InsideTheIntel386ProcessorDieT_t.jpg" /></p><p>“Processors are driven by a clock, which controls the timing of each step inside the chip. In this blog post, I’ll examine the clock-generation circuitry inside the Intel 386 processor. Earlier processors such as the 8086 (1978) were simpler …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/interfacing-sx1278-ra-02-lora-module-with-arduino.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_InterfacingSx1278Ra02LoraModul_t.jpg" /></p><p>“Here LORA SX1278 module is used with Arduino to implement Long distance Bi directional communication What is LoRa LoRa, a wireless modulation method, is based on Chirp Spread Spectrum (CSS) technology. It transmits data by encoding it in radio waves …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/iot-robot-car-using-mqtt.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_IotRobotCarUsingMqtt_t.jpg" /></p><p>“Build an Arduino powered robot or car that can be remotely controlled over the web using the EMQX MQTT broker. In this guide I’ll show you how to quickly put together a remote controlled robot using off-the-shelf parts and …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/liquid-propane-tank-remote-level-monitoring.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_LiquidPropaneTankRemoteLevelMo_t.jpg" /></p><p>“Wanted to monitor my liquid propane tank level and add it to my dashboard for monitoring. Wanted to monitor my propane tank levels and add it to my existing Grafana dashboard to monitor the level. The Dials on the propane …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/macro-mouse.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_MacroMouse_t.jpg" /></p><p>“Versatile handheld device merging keyboard and mouse functionality offering enhanced control. Plug and play device works via Bluetooth The mouse and keyboard are two essential input devices used for computing. Wireless keyboards and mice have become increasingly popular due to …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/noise-box.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_NoiseBox_t.jpg" /></p><p>“Hello and welcome back, everyone. Now for something loud: the “Noise BOX” Project is a do-it-yourself synth built from scratch utilizing an Audio AMPLIFER Module and a Custom Synth Board joined by a 3D printed body. As the name suggests …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/opamp-usage-with-arduino-uno-r4.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_OpampUsageWithArduinoUnoR4_t.jpg" /></p><p>“Using analog components in a digital environment is quite unusual and it is difficult to find information about. First steps are shown here. When the revision of ARDUINO UNO R4 was advertised all the distributers did not hesitate to mention …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/random-number-generator-using-common-geiger-counter.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_RandomNumberGeneratorUsingComm_t.jpg" /></p><p>“This project permits the creation of RNG generators based on nuclear decay, interfacing a Geiger counter with audio exit to a MC. It’s an evolution of my previous project you find here: NuclearRNG text Here Theoretically it permits the …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/randomizing-servos-with-arduino.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_RandomizingServosWithArduino_t.jpg" /></p><p>“This project will show you how to randomly trigger up to 12 servos using Arduino code. Write Sketch and Upload the Code Plug your Uno into your computer and open a new sketch in Arduino IDE. Copy and paste the …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/rev-20-of-the-rp2040-joystick-mouse.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_Rev20OfTheRp2040JoystickMouse_t.jpg" /></p><p>“Rev 2.0 of the RP2040 Joystick Mouse, as well as the code that makes it work Over the last few months, I have been using the initial revision of this project on almost a daily basis. It has come …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/reverse-engineering-the-intel-386-processors-register-cell.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_ReverseEngineeringTheIntel386P_t.jpg" /></p><p>“The groundbreaking Intel 386 processor (1985) was the first 32-bit processor in the x86 line. It has numerous internal registers: general-purpose registers, index registers, segment selectors, and more specialized registers. In this blog post, I look at the silicon die …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/sdrsharp-controller.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_SdrsharpController_t.jpg" /></p><p>“Control the SDRSharp software with physical controls for a more natural experience using a software defined radio. Some time ago I attempted to create physical controls for SDRSharp using the excellent SDRSharp Net Remote plugin for SDRSharp created by Al …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/segstick.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_SegStick_t.jpg" /></p><p>“Do-it-yourself self-balancing…things…have been around almost as long as commercial self-balancing things. Obviously the homemade versions are not as smooth, reliable, or failsafe as the real thing, but they are still pretty captivating. And they make great mechanical/electrical …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/single-axis-automatic-solar-tracker.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_SingleAxisAutomaticSolarTracke_t.jpg" /></p><p>“This project has been made by AndPM students & has proven to produce efficient electrical energy. Panels are kept perpendicular to the Sun. This project was made for a school event - “Science fair”. It has been one of the winning projects …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/single-button-game-console-with-arduino-and-pcb.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_SingleButtonGameConsoleWithArd_t.jpg" /></p><p>“A project that strikes a balance between simplicity and innovation – a single-button game console. Hello there, DIY enthusiasts and tech aficionados. Today, I’m excited to introduce a project that strikes a balance between simplicity and innovation – a single-button game …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/sip-n-sprout-automated-plant-device.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_SipNSproutAutomatedPlantDevice_t.jpg" /></p><p>“This device fully automates necessary processes for house plants including light and water regulation. I’ve personally always enjoyed having plants so when I came to college, I thought it would be nice to grow some in my room. After …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/smart-houseplant-watering-system.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_SmartHouseplantWateringSystem_t.jpg" /></p><p>“Automate plant care with a smart watering system: optimizes hydration with sensors & app control, for healthier plants & happier you! The project is about creating a smart houseplant watering system designed to simplify and optimize the care of indoor plants. The …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/smart-power-monitor.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_SmartPowerMonitor_t.jpg" /></p><p>“The power monitor with the Matter protocol for devices in a smart house. It monitors the consuming power, the current and the voltage. The power monitor takes an important role in smart home devices. There are many power monitors available …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/smart-vertical-farming.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_SmartVerticalFarming_t.jpg" /></p><p>“Vertical farming is a promising solution to address the challenges of limited space, climate change, and resource scarcity. Stacking crops and plants atop vertical, multi-level racks within a facility with a controlled atmosphere is known as vertical farming. Every rack …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/smartroom-controller.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_SmartroomController_t.jpg" /></p><p>“Control heat, air, and lighting without ever getting up from the couch. This is a mid-term project for the Deep Dive IoT and prototyping bootcamp I am currently enrolled in with the Central New Mexico Community College Ingenuity program. It …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/temperature-control-neo-pixels-with-arduino-nano.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_TemperatureControlNeoPixelsWit_t.jpg" /></p><p>“Will guide you to build a DHT11 controlled Neo pixel lighting system with Arduino Nano A NeoPixel ring controlled by a DHT11 sensor and an Arduino Nano can be a fascinating project that combines temperature sensing with visual feedback. This …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/the-future-of-water-management-smart-water-meters.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_TheFutureOfWaterManagementSmar_t.jpg" /></p><p>“We started with the idea of creating an interactive demo for fairs and it turned into one of the best side projects - the Bubblemaker! We tried to create an engaging demo-game for events which should show the example of what …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/the-ultimate-servo-claw-game.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_TheUltimateServoClawGame_t.jpg" /></p><p>“In this tutorial we will be creating a servo claw game which can be a fun way to make students learn about EMG and how the muscle signals can be used in controlling a prosthetic hand as the mechanism is …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/toy-controller-wifi.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_ToyControllerWifi_t.jpg" /></p><p>“A friend of mine gave me a baby toy to hack awhile back, and I finally got a chance to take a crack at it. Hardware When I initially opened up the toy, I was overjoyed that: It was made …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/voice-enabled-video-game-controller.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_VoiceEnabledVideoGameControlle_t.jpg" /></p><p>“This controller enables gamers with limited mobility to use voice commands as additional inputs for playing video games. This project demonstrates how to build a voice-enabled video game controller, designed to help users with mobility impairments interact with games using …</p>

2023-11-30T00:00:00+00:002023-11-30T00:00:00+00:00João Alvestag:jpralves.net,2023-11-30:post/2023/11/30/xiao-power-meter-with-ina219.html

<p><img alt="" src="https://jpralves.net/imgt/2023/11/PM444_XiaoPowerMeterWithIna219_t.jpg" /></p><p>“This blog is about how to make a tiny power meter based on a INA219 current sensor. which will show the voltage, current, and wattage of connected devices. this meter is built super tiny by utilizing the small size of …</p>

2023-10-26T00:00:00+01:002023-10-26T00:00:00+01:00João Alvestag:jpralves.net,2023-10-26:post/2023/10/26/3d-printed-arduino-halloween-decor.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM443_3DPrintedArduinoHalloweenDecor_t.jpg" /></p><p>“In this Spooktacular video I am going to create an Arduino based 3D printed Halloween Décor. It’s super easy, fun and spooky. When the full moon is shining and the wolves are howling, it’s time for Halloween’s …</p>

2023-10-26T00:00:00+01:002023-10-26T00:00:00+01:00João Alvestag:jpralves.net,2023-10-26:post/2023/10/26/advanced-cyber-security-and-education-device-superior-boy.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM443_AdvancedCyberSecurityAndEducat_t.jpg" /></p><p>“Superior Boy is Cybersecurity, education, and research in one advanced device. Everything a mobile cybersecurity pro needs. Superior Boy, combining the power of RP2040 and ESP32 microcontrollers, encompasses all the hardware and features that a cybersecurity expert would need on …</p>

2023-10-26T00:00:00+01:002023-10-26T00:00:00+01:00João Alvestag:jpralves.net,2023-10-26:post/2023/10/26/build-an-outdoor-rover-simple-useful-and-affordable.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM443_BuildAnOutdoorRoverSimpleUsefu_t.jpg" /></p><p>“Build a weatherproof outdoor rover for less than $500 with a Raspberry Pi and Viam. Approaching robotics can be daunting. Many of us who have tried have ended up with empty wallets, life to catch up on, and spare parts …</p>

2023-10-26T00:00:00+01:002023-10-26T00:00:00+01:00João Alvestag:jpralves.net,2023-10-26:post/2023/10/26/digital-weighing-scale-with-improved-visibility-and-battery-life-extension-timer.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM443_DigitalWeighingScaleWithImprov_t.jpg" /></p><p>“Common commercial bathroom scales allow a long battery life thanks to the use of low-consumption displays (typically LCD without backlight) which, however, in low light conditions are not easily readable. My idea was to build a load cell based scale …</p>

2023-10-26T00:00:00+01:002023-10-26T00:00:00+01:00João Alvestag:jpralves.net,2023-10-26:post/2023/10/26/diy-advanced-arduino-colloidal-silver-generator.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM443_DiyAdvancedArduinoColloidalSil_t.jpg" /></p><p>“How to make an advanced colloidal silver device with Arduino, which has all the features of such commercial devices. A colloidal silver generator is a device used to produce suspension of tiny silver particles in a liquid, typically water. Colloidal …</p>

2023-10-26T00:00:00+01:002023-10-26T00:00:00+01:00João Alvestag:jpralves.net,2023-10-26:post/2023/10/26/diy-iot-electronic-shelf-label-with-google-firebase.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM443_DiyIotElectronicShelfLabelWith_t.jpg" /></p><p>“An electronic shelf label (ESL) is a type of price tag. The one that enables you to easily set and update the product name, pricing, product description, etc. The ESL that I’ve developed enables you to showcase up to …</p>

2023-10-26T00:00:00+01:002023-10-26T00:00:00+01:00João Alvestag:jpralves.net,2023-10-26:post/2023/10/26/easy-talking-skull-with-microbit-remote-control-animatronic-skull-diy.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM443_EasyTalkingSkullWithMicroBitRe_t.jpg" /></p><p>“They think treat, we think trick! This DIY talking skull project can be controlled from afar so that you can prank your trick-or-treaters. They’ll think it’s a store-bought Halloween display, but then when it starts to say things …</p>

2023-10-26T00:00:00+01:002023-10-26T00:00:00+01:00João Alvestag:jpralves.net,2023-10-26:post/2023/10/26/escorebuzz-live-cricket-updates.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM443_EscorebuzzLiveCricketUpdates_t.jpg" /></p><p>“Hey, DIY enthusiasts! I hope you’re all having a fantastic day so far. You know, mornings like these often bring out our most creative thoughts.And speaking of creativity, I’m sure many of you have been caught up …</p>

2023-10-26T00:00:00+01:002023-10-26T00:00:00+01:00João Alvestag:jpralves.net,2023-10-26:post/2023/10/26/ghost-pepper-voice-assistant-for-ha.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM443_GhostPepperVoiceAssistantForHa_t.jpg" /></p><p>“A ‘holographic’ voice assistant for Home Assistant with a twist in the hips This is an offline visual voice assistant that connects via MQTT to any domotica system that supports MQTT. I use it to control my Home Assistant system …</p>

2023-10-26T00:00:00+01:002023-10-26T00:00:00+01:00João Alvestag:jpralves.net,2023-10-26:post/2023/10/26/mcp23008-breakout.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM443_Mcp23008Breakout_t.jpg" /></p><p>“A quick MCP23008 Breakout to be used during prototyping. I designed this breakout to assist me during prototyping my next version of the “RP2040 Emergency Mouse“. In that project, I used the SEEED Studio Xiao RP2040, along with a few …</p>

2023-10-19T00:00:00+01:002023-10-19T00:00:00+01:00João Alvestag:jpralves.net,2023-10-19:post/2023/10/19/birdy44.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM442_Birdy44_t.jpg" /></p><p>“A low-profil 3d printed and handwired split keyboard Supplies - 2x Waveshare RP2040-Zero - Mill-Max round pin headers - 2x 40mm Cirque Trackpads - 2x TRRS connectors - 44x Kailh Choc V1 switches - 44x ln4148 diodes - 8x round magnets 8x2mm - 4x round magnets 8x3mm …</p>

2023-10-19T00:00:00+01:002023-10-19T00:00:00+01:00João Alvestag:jpralves.net,2023-10-19:post/2023/10/19/building-a-health-guard-system-for-remote-health-monitoring.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM442_BuildingAHealthGuardSystemForR_t.jpg" /></p><p>“Health-Guard: Empowering Patients & Healthcare Providers with Freedom & Real-time Vital Monitoring. Introduction In this tutorial, I will guide you through the process of building a “Health Guard” system for remote health monitoring. This project is designed to address the limitations of …</p>

2023-10-19T00:00:00+01:002023-10-19T00:00:00+01:00João Alvestag:jpralves.net,2023-10-19:post/2023/10/19/digital-clock-with-arduino-uno-rev4-wifis-rtc-an-led-matrix.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM442_DigitalClockWithArduinoUnoRev4_t.jpg" /></p><p>“Building a clock with just a microcontroller board. As all needed components like RTC and LED matrix are already built in. In this tutorial I will look at the built-in RTC module on the new Arduino Uno R4 WIFI board …</p>

2023-10-19T00:00:00+01:002023-10-19T00:00:00+01:00João Alvestag:jpralves.net,2023-10-19:post/2023/10/19/diy-simple-500khz-oscilloscope-with-stm32.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM442_DiySimple500KhzOscilloscopeWit_t.jpg" /></p><p>“With this instrument we can now observe the shape of signals with a frequency of up to 500KHz. An oscilloscope, often referred to as an “scope, ” is a test instrument used to visualize and analyze the waveform of electronic signals …</p>

2023-10-19T00:00:00+01:002023-10-19T00:00:00+01:00João Alvestag:jpralves.net,2023-10-19:post/2023/10/19/examining-the-silicon-dies-of-the-intel-386-processor.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM442_ExaminingTheSiliconDiesOfTheIn_t.jpg" /></p><p>“You might think of the Intel 386 processor (1985) as just an early processor in the x86 line, but the 386 was a critical turning point for modern computing in several ways.1 First, the 386 moved the x86 architecture …</p>

2023-10-19T00:00:00+01:002023-10-19T00:00:00+01:00João Alvestag:jpralves.net,2023-10-19:post/2023/10/19/faz-wrench-five-nights-at-freddys.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM442_FazWrenchFiveNightsAtFreddyS_t.jpg" /></p><p>“You can build a prop replica of the Faz Wrench from Five Nights of Freddy’s Security Breach – Ruin. We designed and 3D printed this prop to use the RP2040 PropMaker Feather and CircuitPython. It’s got a working LCD …</p>

2023-10-19T00:00:00+01:002023-10-19T00:00:00+01:00João Alvestag:jpralves.net,2023-10-19:post/2023/10/19/how-to-make-xiao-esp32s3-board-based-robotic-arm.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM442_HowToMakeXiaoEsp32S3BoardBased_t.jpg" /></p><p>“In this project, the robotic arm will execute actions corresponding to the commands received from the web server. Greetings everyone, and welcome to my Article tutorial. Today, I’ll guide you through creating an XIAO ESP32S3 board-based Robotic Arm. Project …</p>

2023-10-19T00:00:00+01:002023-10-19T00:00:00+01:00João Alvestag:jpralves.net,2023-10-19:post/2023/10/19/kaboombox-an-rfid-8-track-player.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM442_KaboomboxAnRfid8TrackPlayer_t.jpg" /></p><p>“Vinyl records provide nice, warm analog sound. CDs have nearly lossless storage for high-quality music. Even cassette tapes have a certain nostalgic appeal and cool factor. But 8-track cartridges are almost useless, because they don’t offer any real benefits …</p>

2023-10-19T00:00:00+01:002023-10-19T00:00:00+01:00João Alvestag:jpralves.net,2023-10-19:post/2023/10/19/lorawan-based-tinyml-snake-recognition-system.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM442_LorawanBasedTinymlSnakeRecogni_t.jpg" /></p><p>“A snake recognition project using XIAO ESP32-S3 Sense development board, combined with Arduino and Edge Impulse. One truth is that snakes often appear in farms and pose a threat to human safety. I looked up some relevant information, according …</p>

2023-10-19T00:00:00+01:002023-10-19T00:00:00+01:00João Alvestag:jpralves.net,2023-10-19:post/2023/10/19/neopixel-fiber-optic-pumpkin-or-jack-olatern-with-raspberry-pi-pico.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM442_NeopixelFiberOpticPumpkinOrJac_t.jpg" /></p><p>“This 3D-printed pumpkin with integrated fiber optics can be printed with or without the face to use it as a Jack O’Latern for Halloween or a deco pumpkin. It uses a cheap Raspberry Pi Pico to drive 9 LEDs …</p>

2023-10-19T00:00:00+01:002023-10-19T00:00:00+01:00João Alvestag:jpralves.net,2023-10-19:post/2023/10/19/pcb-hotplate-v3.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM442_PcbHotplateV3_t.jpg" /></p><p>“This project outperforms two previous hotplates in both electrical and mechanical aspects. It has two separate boards—the coil board and the driver board—that are joined together by 40mm-long PCB standoffs. This project is powered by an XIAO ESP32 …</p>

2023-10-19T00:00:00+01:002023-10-19T00:00:00+01:00João Alvestag:jpralves.net,2023-10-19:post/2023/10/19/smart-compass.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM442_SmartCompass_t.jpg" /></p><p>“A normal compass just points north (boring). Lets make something smarter, that points to any required place. Our general compass just points towards north. I decided to make a smart compass, that will point to the nearest place selected using …</p>

2023-10-19T00:00:00+01:002023-10-19T00:00:00+01:00João Alvestag:jpralves.net,2023-10-19:post/2023/10/19/soldering-air-filter.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM442_SolderingAirFilter_t.jpg" /></p><p>“Hello there, In this Instructable I will walk through how I built a simple air filter fan to help remove smoke and other particles from the air while I’m soldering. If you want to build one, read on, I …</p>

2023-10-19T00:00:00+01:002023-10-19T00:00:00+01:00João Alvestag:jpralves.net,2023-10-19:post/2023/10/19/spark-analyzer.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM442_SparkAnalyzer_t.jpg" /></p><p>“Spark Analyzer is a compact, sleek, IoT-enabled USB-C Power Delivery device with built-in power analyzer capabilities. Story Introducing Spark Analyzer, an innovative ESP32-powered USB-C Power Delivery (UCPD) compatible device designed to streamline the development and debugging process …</p>

2023-10-19T00:00:00+01:002023-10-19T00:00:00+01:00João Alvestag:jpralves.net,2023-10-19:post/2023/10/19/tims-draw-bot.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM442_TimSDrawBot_t.jpg" /></p><p>“This is a little drawing Robot. - I made it quite a while ago, and it went through many iterations. - If you want to see some info on the early ones, I did a blog. My goal was to make one …</p>

2023-10-19T00:00:00+01:002023-10-19T00:00:00+01:00João Alvestag:jpralves.net,2023-10-19:post/2023/10/19/xiao-esp32c3-portable-weighing-scale-battery-level-indicator.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM442_XiaoEsp32C3PortableWeighingSca_t.jpg" /></p><p>“XIAO ESP32C3 Weigh-n-Charge: Portable scale for weight measurement with a built-in battery indicator, ideal for on-the-go use. The portable weighing scale is designed with flexibility in mind. It currently has a maximum load capacity of 5 kilograms. However, the load …</p>

2023-10-12T00:00:00+01:002023-10-12T00:00:00+01:00João Alvestag:jpralves.net,2023-10-12:post/2023/10/12/budget-diy-gpsgnss-base-station-receiver-setup-with-esp32.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM441_BudgetDiyGpsGnssBaseStationRec_t.jpg" /></p><p>“Build a GPS/GNSS Base Station for $350 or less with an ESP32 and UM980. The ESP32 is a versatile microcontroller renowned for its WiFi and Bluetooth capabilities. In this guide, we’ll walk you through setting up the your …</p>

2023-10-12T00:00:00+01:002023-10-12T00:00:00+01:00João Alvestag:jpralves.net,2023-10-12:post/2023/10/12/classic-macintosh-video-signals-demystified-designing-a-mac-to-vga-adapter-with-lm1881.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM441_ClassicMacintoshVideoSignalsDe_t.jpg" /></p><p>“In the late 1980s When Apple released its first Macintosh models supporting external color monitors, the company made some design choices that continue to cause trouble even today. Computers like the Macintosh IIci supported 640 x 480 video resolution, the …</p>

2023-10-12T00:00:00+01:002023-10-12T00:00:00+01:00João Alvestag:jpralves.net,2023-10-12:post/2023/10/12/control-board-for-6-servomotors-based-on-arduino-for-robotic.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM441_ControlBoardFor6ServomotorsBas_t.jpg" /></p><p>“Electronic board based on Arduino with the ATMEGA328P chip, with power rail and PWM control pins for 6 servomotors. Very useful for robotics In the last few weeks we started developing this robotic arm. It is made up of 5 …</p>

2023-10-12T00:00:00+01:002023-10-12T00:00:00+01:00João Alvestag:jpralves.net,2023-10-12:post/2023/10/12/digital-ac-energy-measurement-circuit-voltage-current-pow.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM441_DigitalAcEnergyMeasurementCirc_t.jpg" /></p><p>“Dealing with the 110V/220V AC mains voltage and measuring the AC load parameters are regarded as a challenge for electronic designers in circuit design and calculations. The situation becomes more complex when dealing with inductive loads because they cause …</p>

2023-10-12T00:00:00+01:002023-10-12T00:00:00+01:00João Alvestag:jpralves.net,2023-10-12:post/2023/10/12/how-to-make-simple-nodemcu-robotic-car.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM441_HowToMakeSimpleNodemcuRoboticC_t.jpg" /></p><p>“Hey, guys in this article we will see how to make this simple and amazing Robotic car., If you are a beginner in Robotics you must definitely give it a try to build this amazing robot. I have given all …</p>

2023-10-12T00:00:00+01:002023-10-12T00:00:00+01:00João Alvestag:jpralves.net,2023-10-12:post/2023/10/12/how-to-useconfigure-a-bluetooth-module.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM441_HowToUseConfigureABluetoothMod_t.jpg" /></p><p>“This is about using Bluetooth Modules. - The cheep ones from eBay. - There two main types, 4 pin (HC-06) and 6 pin (HC-05). Please Note! - When I say HC-05 and HC-06 I am refiring to the Module …</p>

2023-10-12T00:00:00+01:002023-10-12T00:00:00+01:00João Alvestag:jpralves.net,2023-10-12:post/2023/10/12/make-your-hydroponics-system-fully-automated-and-view-data-via-the-dashboard.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM441_MakeYourHydroponicsSystemFully_t.jpg" /></p><p>“This project shows how to control the hydroponic system as automation and how to monitor the desired data through applications. First of all, I should mention that I am not familiar with hydroponics and soilless growing culture. With this project …</p>

2023-10-12T00:00:00+01:002023-10-12T00:00:00+01:00João Alvestag:jpralves.net,2023-10-12:post/2023/10/12/making-your-first-isp-programmer.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM441_MakingYourFirstIspProgrammer_t.jpg" /></p><p>“This is a Beginner Project teaches them how to make their first ISP PCB annd go through details Components Note these Components are SMD packages - ATtiny 44 - 20MHz resonator - 1uF capacitor - 10K resistor - 1.5K resistor - 0 Resistor - 100 Resistor …</p>

2023-10-12T00:00:00+01:002023-10-12T00:00:00+01:00João Alvestag:jpralves.net,2023-10-12:post/2023/10/12/play-audio-from-spi-flash-with-a-microcontroller.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM441_PlayAudioFromSpiFlashWithAMicr_t.jpg" /></p><p>“How to use a microcontroller to drive a speaker using PWM from audio levels stored in a SPI flash chip This project uses a microcontroller’s PWM output to drive a speaker and play audio stored in a SPI flash …</p>

2023-10-12T00:00:00+01:002023-10-12T00:00:00+01:00João Alvestag:jpralves.net,2023-10-12:post/2023/10/12/portable-arduino-fm-radio.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM441_PortableArduinoFmRadio_t.jpg" /></p><p>“Portable FM-Radio receiver using Arduino Nano Every and TEA5767. After building a school project transmitting 2.4GHz sinusoidal wave as a first year student, I got interested in the wonderful world of RF-electronics. Right after finishing that project …</p>

2023-10-12T00:00:00+01:002023-10-12T00:00:00+01:00João Alvestag:jpralves.net,2023-10-12:post/2023/10/12/real-world-driving-simulator-for-any-game-physical-vehicle.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM441_RealWorldDrivingSimulatorForAn_t.jpg" /></p><p>“It can be used to play car racing games or experience driving a real car. It can be used to drive an RC car using real controls. This is the driving simulator, we can play car racing came with it …</p>

2023-10-12T00:00:00+01:002023-10-12T00:00:00+01:00João Alvestag:jpralves.net,2023-10-12:post/2023/10/12/subscriberboard-a-home-assistant-connected-oversized-7-segment-display.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM441_SubscriberboardAHomeAssistantC_t.jpg" /></p><p>“SubscriberBoard is a four-digit, seven-segment display scaled up to a size that makes it perfect for wall art! It connects to a Home Assistant home automation server and can show whatever four-digit numbers that server can send via MQTT. I …</p>

2023-10-12T00:00:00+01:002023-10-12T00:00:00+01:00João Alvestag:jpralves.net,2023-10-12:post/2023/10/12/try-to-win-against-this-othello-game.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM441_TryToWinAgainstThisOthelloGame_t.jpg" /></p><p>“Several game levels will allow you to discover the Othello game or to become a champion The Othello game is a strategy board game like chess or checkers. The rules are very simple: the two players put down alternately black …</p>

2023-10-12T00:00:00+01:002023-10-12T00:00:00+01:00João Alvestag:jpralves.net,2023-10-12:post/2023/10/12/z80atmega128.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM441_Z80Atmega128_t.jpg" /></p><p>“This project aims to build a system utilizing the Z80A and running CP/M-80 directly. You might be wondering why I chose the Z80 today. Well, it happened to be discovered in my collection of electronic components after being tucked …</p>

2023-10-05T00:00:00+01:002023-10-05T00:00:00+01:00João Alvestag:jpralves.net,2023-10-05:post/2023/10/05/an-alarm-clock-with-no-buttons.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM440_AnAlarmClockWithNoButtons_t.jpg" /></p><p>“Everything about this alarm clock is controlled from your smart phone using the Arduino Cloud. And it sets itself using NTP time. Alarm clocks usually come with a variety of buttons and switches. As a minimum, we need to set …</p>

2023-10-05T00:00:00+01:002023-10-05T00:00:00+01:00João Alvestag:jpralves.net,2023-10-05:post/2023/10/05/attiny13binarywatches.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM440_Attiny13Binarywatches_t.jpg" /></p><p>“Simple Binary Watches with 4 LED(1/5, 2/10, 4/20, 8/40), it mean 5 minute accuracy indicate. How it’s work? Every 0.5 sec CPU wake up(cycle iteration time 100 nS) and increase milliseconds value …</p>

2023-10-05T00:00:00+01:002023-10-05T00:00:00+01:00João Alvestag:jpralves.net,2023-10-05:post/2023/10/05/battery-backup.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM440_BatteryBackup_t.jpg" /></p><p>“This is not a battery charging circuit, just a basic circuit for brief interruptions in mains power. This circuit monitors the battery level and will indicate if the batteries are good with a green LED, and when they should be …</p>

2023-10-05T00:00:00+01:002023-10-05T00:00:00+01:00João Alvestag:jpralves.net,2023-10-05:post/2023/10/05/grove-smart-ir-gesture-sensor-paj7660-arduino-project.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM440_GroveSmartIrGestureSensorPaj76_t.jpg" /></p><p>“Practical Arduino project with this intelligent gesture recognition module equipped with an infrared camera sensor and applied AI algorithm. Тoday I received the package I ordered from Seed Studio, and it contains the Grove smart IR Gesture sensor. The product …</p>

2023-10-05T00:00:00+01:002023-10-05T00:00:00+01:00João Alvestag:jpralves.net,2023-10-05:post/2023/10/05/how-flip-flops-are-implemented-in-the-intel-8086-processor.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM440_HowFlipFlopsAreImplementedInTh_t.jpg" /></p><p>“A key concept for a processor is the management of “state”, information that persists over time. Much of a computer is built from logic gates, such as NAND or NOR gates, but logic gates have no notion of time. Processors …</p>

2023-10-05T00:00:00+01:002023-10-05T00:00:00+01:00João Alvestag:jpralves.net,2023-10-05:post/2023/10/05/how-to-turn-any-dc-motor-into-a-servo-motor.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM440_HowToTurnAnyDcMotorIntoAServoM_t.jpg" /></p><p>“In this tutorial we will learn how to turn any DC motor into a stand-alone custom servo motor with a lot of features. Unlike regular servos that have limited motion of 180 or 270 degrees, this one has unlimited range …</p>

2023-10-05T00:00:00+01:002023-10-05T00:00:00+01:00João Alvestag:jpralves.net,2023-10-05:post/2023/10/05/kaluma.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM440_Kaluma_t.jpg" /></p><p>“Kaluma is a tiny and efficient JavaScript runtime for RP2040 (Raspberry Pi Pico). The main features are: - Small footprint. Runs minimally on microcontrollers with 300KB ROM with 64KB RAM. - Support modern JavaScript standards (ECMAScript 5/6/6+). Powered by JerryScript …</p>

2023-10-05T00:00:00+01:002023-10-05T00:00:00+01:00João Alvestag:jpralves.net,2023-10-05:post/2023/10/05/smart-disk-lamp.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM440_SmartDiskLamp_t.jpg" /></p><p>“Smart desk lamp It lights when there is a person or motion and the light is weak or there is no lighting smart desk lamp This desk lamp is different in these points ….. It lights when there is a person …</p>

2023-10-05T00:00:00+01:002023-10-05T00:00:00+01:00João Alvestag:jpralves.net,2023-10-05:post/2023/10/05/synthesize-music-with-animations-on-a-raspberry-pi-pico.html

<p><img alt="" src="https://jpralves.net/imgt/2023/10/PM440_SynthesizeMusicWithAnimationsO_t.jpg" /></p><p>“Learn how to create a real time MIDI synthesizer with spectrum visualization and no RTOS using a Raspberry Pi Pico The Raspberry Pi Pico is an extremely popular and capable MCU (microcontroller) development platform that is based on Raspberry Pi …</p>

2023-09-28T00:00:00+01:002023-09-28T00:00:00+01:00João Alvestag:jpralves.net,2023-09-28:post/2023/09/28/automatic-pet-feeder.html

<p><img alt="" src="https://jpralves.net/imgt/2023/09/PM439_AutomaticPetFeeder_t.jpg" /></p><p>“A feeder for pets that pours food on a schedule or on a remote control. The sleep and feeding schedules of humans and cats differ significantly. To ensure that your furry friend can eat whenever they please, you can create …</p>

2023-09-28T00:00:00+01:002023-09-28T00:00:00+01:00João Alvestag:jpralves.net,2023-09-28:post/2023/09/28/ecg-with-ppg-using-arduino.html

<p><img alt="" src="https://jpralves.net/imgt/2023/09/PM439_EcgWithPpgUsingArduino_t.jpg" /></p><p>“A plethysmogram is a graph of blood volume vs time and a photoplethysmogram (PPG) uses light to measure blood volume, often with a finger probe. You can buy a pulse oximeter very cheaply on eBay. It uses photoplethysmography to measure …</p>

2023-09-28T00:00:00+01:002023-09-28T00:00:00+01:00João Alvestag:jpralves.net,2023-09-28:post/2023/09/28/flea-scope-usb-oscilloscope-18-msps-13-bom-webusb.html

<p><img alt="" src="https://jpralves.net/imgt/2023/09/PM439_FleaScopeUsbOscilloscope18Msps_t.jpg" /></p><p>“Flea-Scope is a very low-cost ($13 BoM in quantity) and easy-to-use 18 million sample-per-second (Msps) USB oscilloscope and mixed-signal logic analyzer with a built-in waveform generator, and so much more, based on the PIC32MK MCU! Flea-Scope can be controlled by …</p>

2023-09-28T00:00:00+01:002023-09-28T00:00:00+01:00João Alvestag:jpralves.net,2023-09-28:post/2023/09/28/i-made-a-nano-usb-hub.html

<p><img alt="" src="https://jpralves.net/imgt/2023/09/PM439_IMadeANanoUsbHub_t.jpg" /></p><p>“A small hub which is designed to pack inside any laptop, where space is very less and extra USB port is required. I want to use the USB hub internally in my laptop but the available ones are very bulky …</p>

2023-09-28T00:00:00+01:002023-09-28T00:00:00+01:00João Alvestag:jpralves.net,2023-09-28:post/2023/09/28/magiclick-esp32s3.html

<p><img alt="" src="https://jpralves.net/imgt/2023/09/PM439_MagiclickEsp32S3_t.jpg" /></p><p>“A single-button keyboard, based on ESP32-S3, with a color screen. CircuitPython is used by default. You can also use MicroPython, Arduino. - The display part adopts a 0.85-inch color screen, 128x128 resolution, and the display content is delicate - The …</p>

2023-09-28T00:00:00+01:002023-09-28T00:00:00+01:00João Alvestag:jpralves.net,2023-09-28:post/2023/09/28/micromote-the-esp-now-based-gesture-remote.html

<p><img alt="" src="https://jpralves.net/imgt/2023/09/PM439_MicromoteTheEspNowBasedGesture_t.jpg" /></p><p>“MicroMote: The ESP-Now Based Gesture Remote Introducing MicroMote: The ESP-Now Based Gesture Remote Are you ready to take control of your smart devices with a wave of your hand? Look no further than MicroMote, the revolutionary ESP32 S3-based …</p>

2023-09-28T00:00:00+01:002023-09-28T00:00:00+01:00João Alvestag:jpralves.net,2023-09-28:post/2023/09/28/simple-stm32-frequency-meter-from-1hz-to-30-mhz-arduino-ide.html

<p><img alt="" src="https://jpralves.net/imgt/2023/09/PM439_SimpleStm32FrequencyMeterFrom1_t.jpg" /></p><p>“This frequency meter uses an inexpensive STM32 microcontroller, and the frequency range is from 0 to 30 MHz A frequency meter, also known as a frequency counter, is a device or instrument used to measure the frequency of an oscillating …</p>

2023-09-21T00:00:00+01:002023-09-21T00:00:00+01:00João Alvestag:jpralves.net,2023-09-21:post/2023/09/21/433-mhz-radio-frequency-transmitter-extender-amplifier-modu.html

<p><img alt="" src="https://jpralves.net/imgt/2023/09/PM438_433MhzRadioFrequencyTransmitte_t.jpg" /></p><p>“Sometimes, there is a need to extend the frequency range of your RF transmitter. This board is suitable for that task. Introduction 433MHz radio frequency transmitter modules are widely used in various wireless applications and devices. The bulk of RF …</p>

2023-09-21T00:00:00+01:002023-09-21T00:00:00+01:00João Alvestag:jpralves.net,2023-09-21:post/2023/09/21/autonomous-robot-racer-scratch-mode.html

<p><img alt="" src="https://jpralves.net/imgt/2023/09/PM438_AutonomousRobotRacerScratchMod_t.jpg" /></p><p>“In this project, you’ll learn how to make an autonomous wall-detecting robot. This robot uses an Arduino Nano and Scratch to avoid walls and race around the track. The Tompkins County Public Library uses this robot to hold weekly …</p>

2023-09-21T00:00:00+01:002023-09-21T00:00:00+01:00João Alvestag:jpralves.net,2023-09-21:post/2023/09/21/bluetooth-page-turner-using-seeed-xiao-nrf52840.html

<p><img alt="" src="https://jpralves.net/imgt/2023/09/PM438_BluetoothPageTurnerUsingSeeedX_t.jpg" /></p><p>“Wireless page turner designed for use with piano music apps such as Forscore on a tablet. Can be battery or USB powered. How It Came About My brother is a keen and accomplished piano player (I’m keen too but …</p>

2023-09-21T00:00:00+01:002023-09-21T00:00:00+01:00João Alvestag:jpralves.net,2023-09-21:post/2023/09/21/build-a-self-watering-system.html

<p><img alt="" src="https://jpralves.net/imgt/2023/09/PM438_BuildASelfWateringSystem_t.jpg" /></p><p>“Soil Moisture Sensor - Water Pump - Water Level Sensor - MOSFET - Circuit - Code This project shows how to build a self-watering system whose values can be monitored through an app. The project includes both a breadboard circuit and a printed circuit board …</p>

2023-09-21T00:00:00+01:002023-09-21T00:00:00+01:00João Alvestag:jpralves.net,2023-09-21:post/2023/09/21/diy-pomodoro-pcb-watch-boost-your-productivity.html

<p><img alt="" src="https://jpralves.net/imgt/2023/09/PM438_DiyPomodoroPcbWatchBoostYourPr_t.jpg" /></p><p>“If you’ve been looking for a way to supercharge your productivity and manage your time effectively, this DIY project is perfect for you. I am a fan of productivity stuff, but I often find procrastinating after doing some work …</p>

2023-09-21T00:00:00+01:002023-09-21T00:00:00+01:00João Alvestag:jpralves.net,2023-09-21:post/2023/09/21/iot-home-automation.html

<p><img alt="" src="https://jpralves.net/imgt/2023/09/PM438_IotHomeAutomation_t.jpg" /></p><p>“Home Automation Using IOT & WiFi Here In this project we are going to make an IOT based Home Automation system for our home to control the AC Electrical Appliances(In my case, one Cooler, one Tube Light, LED Bulb and …</p>

2023-09-21T00:00:00+01:002023-09-21T00:00:00+01:00João Alvestag:jpralves.net,2023-09-21:post/2023/09/21/midixcv-midi-to-multiple-control-voltages-converter.html

<p><img alt="" src="https://jpralves.net/imgt/2023/09/PM438_MidixcvMidiToMultipleControlVo_t.jpg" /></p><p>“In 2021 I published a project about a MIDI to CV converter capable of generating up to four control voltages and four digital signals from MIDI messages. It was built around an Arduino nano and a MCP4728 DAC and has …</p>

2023-09-21T00:00:00+01:002023-09-21T00:00:00+01:00João Alvestag:jpralves.net,2023-09-21:post/2023/09/21/retro-analog-style-vu-meter-on-vfd-display.html

<p><img alt="" src="https://jpralves.net/imgt/2023/09/PM438_RetroAnalogStyleVuMeterOnVfdDi_t.jpg" /></p><p>“How to make a VU Meter that uses a VFD (vacuum fluorescent display) instead of analog instruments. VFD Display type is GP1287. A VU meter, also known as a Volume Unit meter, is a device used to display the audio …</p>

2023-09-21T00:00:00+01:002023-09-21T00:00:00+01:00João Alvestag:jpralves.net,2023-09-21:post/2023/09/21/scoppy-oscilloscope-math-channels-tutorial.html

<p><img alt="" src="https://jpralves.net/imgt/2023/09/PM438_ScoppyOscilloscopeMathChannels_t.jpg" /></p><p>“Scoppy is firmware and an Android app that can be used with a Rasperry Pi Pico, Pico W or RP2040 to create a 2-channel, 150kHz oscilloscope. Up until now a missing feature of Scoppy that is found on most oscilloscopes …</p>

2023-09-21T00:00:00+01:002023-09-21T00:00:00+01:00João Alvestag:jpralves.net,2023-09-21:post/2023/09/21/solar-powered-rc-buggy-with-sun-tracking-and-esp32-now.html

<p><img alt="" src="https://jpralves.net/imgt/2023/09/PM438_SolarPoweredRcBuggyWithSunTrac_t.jpg" /></p><p>“I’ve made a solar powered esp32-now rc robot. The solar module is mounted on a camera pan-tilt mechanism and tracks the sun by taking measurements from four photoresistors. This is really two projects in one. The first project is …</p>

2023-09-21T00:00:00+01:002023-09-21T00:00:00+01:00João Alvestag:jpralves.net,2023-09-21:post/2023/09/21/temperature-graph-with-arduino-unor4-wifi-sensirion-sht40.html

<p><img alt="" src="https://jpralves.net/imgt/2023/09/PM438_TemperatureGraphWithArduinoUno_t.jpg" /></p><p>“Let’s use the LED Matrix of the most recent iteration of the Arduino Uno - the R4 Wifi - to plot the current temperature read from an SHT40 This is a two part tutorial. This part decribes the demo itself and …</p>

2023-09-21T00:00:00+01:002023-09-21T00:00:00+01:00João Alvestag:jpralves.net,2023-09-21:post/2023/09/21/voice-controlled-digital-cute-pikachu.html

<p><img alt="" src="https://jpralves.net/imgt/2023/09/PM438_VoiceControlledDigitalCutePika_t.jpg" /></p><p>“Digital pet toy that is controlled using the DFRobot Gravity: Offline Language Learning Voice Recognition Sensor. The Voice Controlled Digital Cute Pikachu project merges technology and nostalgia by bringing the iconic Pokémon character to life through voice commands. Using the …</p>

2023-09-21T00:00:00+01:002023-09-21T00:00:00+01:00João Alvestag:jpralves.net,2023-09-21:post/2023/09/21/wordclock-made-with-a-single-led-strip.html

<p><img alt="" src="https://jpralves.net/imgt/2023/09/PM438_WordclockMadeWithASingleLedStr_t.jpg" /></p><p>“Hello everyone. I’d like to show you a WordClock I made with a single LED strip. An ESP32 and an LED strip are the only electric parts of this WordClock. It adjusts the time automatically using NTP. The web …</p>

2023-09-21T00:00:00+01:002023-09-21T00:00:00+01:00João Alvestag:jpralves.net,2023-09-21:post/2023/09/21/yes-arduino-nano-esp32-can-play-doom.html

<p><img alt="" src="https://jpralves.net/imgt/2023/09/PM438_YesArduinoNanoEsp32CanPlayDoom_t.jpg" /></p><p>“Create your handheld gaming console using an Arduino Nano ESP32 and play Doom on the go. Doom is a classic first-person shooter game developed and published by id Software in 1993. The game is set in a futuristic sci-fi world …</p>

2023-09-07T00:00:00+01:002023-09-07T00:00:00+01:00João Alvestag:jpralves.net,2023-09-07:post/2023/09/07/3d-scanning-with-esp-32-cam-line-laser-arduino-c.html

<p><img alt="" src="https://jpralves.net/imgt/2023/09/PM436_3DScanningWithEsp32CamLineLase_t.jpg" /></p><p>“3D Scanning using Structured Light (Slit Scanning) With ESP32 CAM, Line Lazer, coded with Arduino, which communicates to Client Application. Structured Light “Slit” Scanner using ESP32-CAM with IoT capabilites. - Scans an Object with a Line Lazer, by rotating it …</p>

2023-09-07T00:00:00+01:002023-09-07T00:00:00+01:00João Alvestag:jpralves.net,2023-09-07:post/2023/09/07/433-mhz-radio-frequency-transmitter-module.html

<p><img alt="" src="https://jpralves.net/imgt/2023/09/PM436_433MhzRadioFrequencyTransmitte_t.jpg" /></p><p>“The project is about designing the 433MHz radio frequency transmitter module that can be used to transmit radio frequencies. Introduction Two devices can communicate with each other using radio frequencies and using an RF transmitter is one of the simplest …</p>

2023-09-07T00:00:00+01:002023-09-07T00:00:00+01:00João Alvestag:jpralves.net,2023-09-07:post/2023/09/07/a-minimalist-led-lamp.html

<p><img alt="" src="https://jpralves.net/imgt/2023/09/PM436_AMinimalistLedLamp_t.jpg" /></p><p>“In this article, I am thrilled to present a project that I recently conceived a unique watch (yes, another watch!) with a twist (maybe a future project). I’ve reimagined the initial concept, made it as a lamp and I …</p>

2023-09-07T00:00:00+01:002023-09-07T00:00:00+01:00João Alvestag:jpralves.net,2023-09-07:post/2023/09/07/advanced-sensitive-lightning-detector-with-pc-graph.html

<p><img alt="" src="https://jpralves.net/imgt/2023/09/PM436_AdvancedSensitiveLightningDete_t.jpg" /></p><p>“Simple to build, but serious instrument for monitoring and predicting weather disasters. Lightning detectors are devices designed to detect the presence of lightning strikes. These detectors utilize various technologies to sense the electromagnetic signals like detecting of Radio Frequency (RF …</p>

2023-09-07T00:00:00+01:002023-09-07T00:00:00+01:00João Alvestag:jpralves.net,2023-09-07:post/2023/09/07/automatic-water-flow-controller-for-a-building.html

<p><img alt="" src="https://jpralves.net/imgt/2023/09/PM436_AutomaticWaterFlowControllerFo_t.jpg" /></p><p>“This project controls the water pump automatically for a multi-storied building and saves water and electricity. The Problem Almost all multi-storied buildings in Bangladesh contain a water tank in the roof and a water reservoir in the ground. An electric …</p>

2023-09-07T00:00:00+01:002023-09-07T00:00:00+01:00João Alvestag:jpralves.net,2023-09-07:post/2023/09/07/battery-powered-silo-level-measurer-pico-lte-and-azure.html

<p><img alt="" src="https://jpralves.net/imgt/2023/09/PM436_BatteryPoweredSiloLevelMeasure_t.jpg" /></p><p>“This project aims to create a battery-powered IoT Silo & Level Meter that measures and sends real-time data to Azure IoT Hub The Sixfab Pico LTE is a special board for making Internet of Things (IoT) devices. It puts together two …</p>

2023-09-07T00:00:00+01:002023-09-07T00:00:00+01:00João Alvestag:jpralves.net,2023-09-07:post/2023/09/07/build-your-own-luxmeter.html

<p><img alt="" src="https://jpralves.net/imgt/2023/09/PM436_BuildYourOwnLuxmeter_t.jpg" /></p><p>“Measure light like a pro! Build your own Luxmeter with our DIY kit. Accurate readings, customizable design. Shed light on your world! This is how I build my Luxmeter for Measuring Light LevelsIntroduction:In a world filled with technology, the …</p>

2023-09-07T00:00:00+01:002023-09-07T00:00:00+01:00João Alvestag:jpralves.net,2023-09-07:post/2023/09/07/cone-lamp-with-xiao.html

<p><img alt="" src="https://jpralves.net/imgt/2023/09/PM436_ConeLampWithXiao_t.jpg" /></p><p>“Made a cone-shaped RGB Lamp from scratch, The lamp consists of WS2812 LEDs that are controlled by an XIAO MCU. Hello everyone, and here’s something flashy: a cone-shaped RGB Lamp built from scratch using custom 3D-printed parts and basic …</p>

2023-09-07T00:00:00+01:002023-09-07T00:00:00+01:00João Alvestag:jpralves.net,2023-09-07:post/2023/09/07/diy-bubble-machine-using-raspberry-pi-pico.html

<p><img alt="" src="https://jpralves.net/imgt/2023/09/PM436_DiyBubbleMachineUsingRaspberry_t.jpg" /></p><p>“The project aims to create a soap bubble machine using a perforated plastic disc attached to a DC motor and a fan. The project aims to create a soap bubble machine using a perforated plastic disc attached to a DC …</p>

2023-09-07T00:00:00+01:002023-09-07T00:00:00+01:00João Alvestag:jpralves.net,2023-09-07:post/2023/09/07/drone-joystick-controller.html

<p><img alt="" src="https://jpralves.net/imgt/2023/09/PM436_DroneJoystickController_t.jpg" /></p><p>“Joystick controller emulates the output of the UDP Joystick App. Use for the PicoW Copter drone by anish-natekar or any UDP JS application. This joystick controller is based on a Raspberry Pi PicoW and has been designed to control the …</p>

2023-09-07T00:00:00+01:002023-09-07T00:00:00+01:00João Alvestag:jpralves.net,2023-09-07:post/2023/09/07/frequency-measurement-with-modern-avr-microcontrollers.html

<p><img alt="" src="https://jpralves.net/imgt/2023/09/PM436_FrequencyMeasurementWithModern_t.jpg" /></p><p>“How to use the AVR64DD32’s asynchronous counter to measure frequencies beyond 100 MHz Modern AVR microcontrollers have asynchronous counters that can be externally driven to count pulses from 1 Hz to beyond 100 MHz. Over the years I’ve …</p>

2023-09-07T00:00:00+01:002023-09-07T00:00:00+01:00João Alvestag:jpralves.net,2023-09-07:post/2023/09/07/haptic-compass-belt.html

<p><img alt="" src="https://jpralves.net/imgt/2023/09/PM436_HapticCompassBelt_t.jpg" /></p><p>“I’ve always wanted to build a compass belt! The idea is to attach a couple of vibration motors to a belt, use a compass sensor to find north, and then to let the motor that points north vibrate! Wearing …</p>

2023-09-07T00:00:00+01:002023-09-07T00:00:00+01:00João Alvestag:jpralves.net,2023-09-07:post/2023/09/07/homemade-smart-watch.html

<p><img alt="" src="https://jpralves.net/imgt/2023/09/PM436_HomemadeSmartWatch_t.jpg" /></p><p>“Since they offer so many features in such a small form, smartwatches are incredibly exciting. But what actually distinguishes a cool smartwatch? It is unquestionably its appearance and qualities. Designing and building your own Smartwatch is the best approach to …</p>

2023-09-07T00:00:00+01:002023-09-07T00:00:00+01:00João Alvestag:jpralves.net,2023-09-07:post/2023/09/07/how-to-motorize-a-camera-slider-battery-powered.html

<p><img alt="" src="https://jpralves.net/imgt/2023/09/PM436_HowToMotorizeACameraSliderBatt_t.jpg" /></p><p>“When making videos with a tripod fluid head, there aren’t that many movements you can do. You’ve got tilt and pan - so basically either a vertical movement or a horizontal movement. Both of these have one common characteristic …</p>

2023-09-07T00:00:00+01:002023-09-07T00:00:00+01:00João Alvestag:jpralves.net,2023-09-07:post/2023/09/07/rgb-light-color-mixer.html

<p><img alt="" src="https://jpralves.net/imgt/2023/09/PM436_RgbLightColorMixer_t.jpg" /></p><p>“RGB light color mixer made with Arduino Nano provided by PCBWay. We see the interaction of the primary colors, varying the intensity of each”</p>

2023-09-07T00:00:00+01:002023-09-07T00:00:00+01:00João Alvestag:jpralves.net,2023-09-07:post/2023/09/07/solar-powered-mechanical-light-sensitive-flower.html

<p><img alt="" src="https://jpralves.net/imgt/2023/09/PM436_SolarPoweredMechanicalLightSen_t.jpg" /></p><p>“This project is the design of a mechanical flower which is sensitive to light and moves in the direction of light. I started off in my mind to design a compact one but as always things don’t necessarily go …</p>

2023-09-07T00:00:00+01:002023-09-07T00:00:00+01:00João Alvestag:jpralves.net,2023-09-07:post/2023/09/07/streaming-esp32-cam-images-to-multiple-browsers-via-mqtt.html

<p><img alt="" src="https://jpralves.net/imgt/2023/09/PM436_StreamingEsp32CamImagesToMulti_t.jpg" /></p><p>“In this tutorial, you’ll learn how to publish images from an ESP32-CAM board to multiple browser clients using MQTT (Message Queuing Telemetry Transport). This setup will enable you to create a platform that functions similarly to a live …</p>

2023-09-07T00:00:00+01:002023-09-07T00:00:00+01:00João Alvestag:jpralves.net,2023-09-07:post/2023/09/07/thermterm-an-open-source-heat-pump-controller-and-home-automation-terminal-built-on-esp32.html

<p><img alt="" src="https://jpralves.net/imgt/2023/09/PM436_ThermtermAnOpenSourceHeatPumpC_t.jpg" /></p><p>“Control heat pumps manually or remotely via MQTT/Home Assistant. I love my heat pumps. They’re energy efficient and the fastest way to heat or cool any room. But I’ve always hated the remote controls that come with …</p>

2023-08-31T00:00:00+01:002023-08-31T00:00:00+01:00João Alvestag:jpralves.net,2023-08-31:post/2023/08/31/ardu14-an-arduino-based-emulator-for-the-science-of-cambridge-mk14-micro-computer.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM435_Ardu14AnArduinoBasedEmulatorFo_t.jpg" /></p><p>“This project is based on the “Portable MK14 emulator in ‘C’”. While I’m not certain of the exact origins, I discovered it in Doug Rice’s Virtual MK14 GitHub repository. Doug and Hein Pragt’s websites were valuable resources …</p>

2023-08-31T00:00:00+01:002023-08-31T00:00:00+01:00João Alvestag:jpralves.net,2023-08-31:post/2023/08/31/can-bus-monitor.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM435_CanBusMonitor_t.jpg" /></p><p>“This is a simple CAN Bus monitor that displays information about the packets on a CAN Bus It’s based on an Adafruit ESP32 Feather, a CAN Bus Transceiver, and a 240x135 TFT Display. I tested it by sending packets …</p>

2023-08-31T00:00:00+01:002023-08-31T00:00:00+01:00João Alvestag:jpralves.net,2023-08-31:post/2023/08/31/conway-8x8.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM435_Conway8X8_t.jpg" /></p><p>“This project is the collection of files necessary to make the above pictured 8x8 grid sculpture playing out Conway’s Game of Life on an ATmega 328P. This project spanned 3 separate periods: 110 hours were spent developing the original …</p>

2023-08-31T00:00:00+01:002023-08-31T00:00:00+01:00João Alvestag:jpralves.net,2023-08-31:post/2023/08/31/digital-weather-station.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM435_DigitalWeatherStation_t.jpg" /></p><p>“Showing live Humidity, pressure, and temperature on OLED Breakout using BME280. In this project I am using a BME280 Breakout board interface with Micro RP2040and 0.91” OLED Display. BME280 breakout board has an I2C communication interface to communicate. With …</p>

2023-08-31T00:00:00+01:002023-08-31T00:00:00+01:00João Alvestag:jpralves.net,2023-08-31:post/2023/08/31/from-blinker-to-risc-v.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM435_FromBlinkerToRiscV_t.jpg" /></p><p>“This tutorial is a progressive journey from a simple blinky design to a RISC-V core. It works with the following boards: - IceStick - IceBreaker - ULX3S - ARTY If you do not have a board, you can run everything in simulation (but …</p>

2023-08-31T00:00:00+01:002023-08-31T00:00:00+01:00João Alvestag:jpralves.net,2023-08-31:post/2023/08/31/gestovoice-gesture-to-voice-conversion.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM435_GestovoiceGestureToVoiceConver_t.jpg" /></p><p>“Gesture Vocalizer: Transforming sign language to speech with a smart glove and app, empowering inclusive communication. Introducing the initiative known as #GestoVoice; Gesture, to Voice Conversion by Riza Mohamed T. This remarkable project was inspired by an encounter with the …</p>

2023-08-31T00:00:00+01:002023-08-31T00:00:00+01:00João Alvestag:jpralves.net,2023-08-31:post/2023/08/31/how-to-make-arduino-gesture-control-robot-at-home-using-radio-module.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM435_HowToMakeArduinoGestureControl_t.jpg" /></p><p>“Hi readers, welcome back to my another interesting instructable, in this project i will show you How To Make Arduino Gesture Control Robot At Home Using Radio Module in a very easy way. To begin with let me go through …</p>

2023-08-31T00:00:00+01:002023-08-31T00:00:00+01:00João Alvestag:jpralves.net,2023-08-31:post/2023/08/31/key-finder-with-the-xiao-nrf52840-module.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM435_KeyFinderWithTheXiaoNrf52840Mo_t.jpg" /></p><p>“Losing keys can be a frustrating experience that disrupts our daily routines. It’s over! Introduction: Wave goodbye to the eternal struggle of lost keys, for technology and innovation have united to provide a solution. Thanks to the collaborative efforts …</p>

2023-08-31T00:00:00+01:002023-08-31T00:00:00+01:00João Alvestag:jpralves.net,2023-08-31:post/2023/08/31/led-beaded-curtain.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM435_LedBeadedCurtain_t.jpg" /></p><p>“I built a flexible screen in the form of a beaded curtain encrusted with LEDs that I control remotely. Ive had this project on my list for quite some time, and the idea is simple: run lots of LEDs in …</p>

2023-08-31T00:00:00+01:002023-08-31T00:00:00+01:00João Alvestag:jpralves.net,2023-08-31:post/2023/08/31/li-fi-data-transfer-experiment-transferring-data-using-a-led-and-solar-cell.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM435_LiFiDataTransferExperimentTran_t.jpg" /></p><p>“In this experiment I will describe you a way where the light from 10W Power LED diode is used for tarnsfering Audio signal wirelessly. Supplies - 10W Power Led - IRF3205 Mosfet - Trimmer Potentiometer, 100 kohm - Capacitor 100 µF - Resistor 4.75k …</p>

2023-08-31T00:00:00+01:002023-08-31T00:00:00+01:00João Alvestag:jpralves.net,2023-08-31:post/2023/08/31/xiao-room-temp-and-humidity-meter.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM435_XiaoRoomTempAndHumidityMeter_t.jpg" /></p><p>“Greetings and welcome back. So here’s something cool: a room temperature and humidity meter that measures current room temperature and humidity and displays the readings on an SSD1306 OLED Screen. AHT10 is being used here to get the Temperature …</p>

2023-08-24T00:00:00+01:002023-08-24T00:00:00+01:00João Alvestag:jpralves.net,2023-08-24:post/2023/08/24/16-bit-serial-homebrew-cpu-2023.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM434_16BitSerialHomebrewCpu2023_t.jpg" /></p><p>“Building a homebrew CPU from scratch takes a large number of logic chips. It is understandable, that implementing registers, program counter, ALU, and other components of the CPU in TTL or CMOS logic does require a substantial amount of chips …</p>

2023-08-24T00:00:00+01:002023-08-24T00:00:00+01:00João Alvestag:jpralves.net,2023-08-24:post/2023/08/24/a-diy-attiny85-temperature-and-fire-alarm.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM434_ADiyAttiny85TemperatureAndFire_t.jpg" /></p><p>“A visual alarm with varying intensities set off by abnormally high temperature thresholds of surrounding air. Create a DIY fire alarm. This temperature and fire alarm alerts users of instances of extreme heat and or a dangerous fire near or …</p>

2023-08-24T00:00:00+01:002023-08-24T00:00:00+01:00João Alvestag:jpralves.net,2023-08-24:post/2023/08/24/a-diy-guide-to-building-a-stylish-transparent-clock.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM434_ADiyGuideToBuildingAStylishTra_t.jpg" /></p><p>“Hey everyone, in today’s article, I’ll be sharing my journey of creating a unique transparent clock. A DIY Guide to Building a Stylish Transparent Clock: Hey everyone, in today’s article, I’ll be sharing my journey of …</p>

2023-08-24T00:00:00+01:002023-08-24T00:00:00+01:00João Alvestag:jpralves.net,2023-08-24:post/2023/08/24/automated-vertical-farming.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM434_AutomatedVerticalFarming_t.jpg" /></p><p>“A system using light, soil moisture and humidity sensors to control the water, light and humidity needed by the vertical farm. Introduction In this group project, the design was to introduce an automation to vertical farming. The automation on vertical …</p>

2023-08-24T00:00:00+01:002023-08-24T00:00:00+01:00João Alvestag:jpralves.net,2023-08-24:post/2023/08/24/build-your-own-gsm-security-calls-alert.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM434_BuildYourOwnGsmSecurityCallsAl_t.jpg" /></p><p>“Unleash security with a cloud-free marvel! Motion detection meets instant calls. DIY your fortress using ESP8266, GSM800L & PIR sensor. Introduction: Imagine a world where you’re alerted instantly without relying on the cloud. With a simple DIY project, you can …</p>

2023-08-24T00:00:00+01:002023-08-24T00:00:00+01:00João Alvestag:jpralves.net,2023-08-24:post/2023/08/24/making-a-solar-tracker-using-various-components.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM434_MakingASolarTrackerUsingVariou_t.jpg" /></p><p>“In today’s world, where sustainable energy solutions are gaining more traction Making a Solar Tracker Using Various Components: In today’s world, where sustainable energy solutions are gaining more traction, harnessing the power of the sun through solar panels …</p>

2023-08-24T00:00:00+01:002023-08-24T00:00:00+01:00João Alvestag:jpralves.net,2023-08-24:post/2023/08/24/the-waterwheel-project.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM434_TheWaterwheelProject_t.jpg" /></p><p>“Motivation: In montaineous regions like the Himalayas, access to reliable electricity remains a challenge for many communities. Despite substantial hydropower potential in these regions, a significant portion of its population still lacks consistent electrical energy. To address this issue, a …</p>

2023-08-24T00:00:00+01:002023-08-24T00:00:00+01:00João Alvestag:jpralves.net,2023-08-24:post/2023/08/24/time-of-flight-modules-some-experiments.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM434_TimeOfFlightModulesSomeExperim_t.jpg" /></p><p>“ToF, introduced some years ago, are still quite new for most of the community. A couple of VL53LOX-V2 were tested. Using the famous HC-SR04 ultrasonic distance sensor is quite common, while using of Time-of-Flight modules up to now …</p>

2023-08-24T00:00:00+01:002023-08-24T00:00:00+01:00João Alvestag:jpralves.net,2023-08-24:post/2023/08/24/voice-level-meter-board.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM434_VoiceLevelMeterBoard_t.jpg" /></p><p>“Utilizing the NE5532 operational amplifier, a voice level meter circuit assesses audio signals. The NE5532 is a widely used operational amplifier (op-amp), carefully designed for applications requiring excellent audio performance. This IC is frequently used in various audio equipment, including …</p>

2023-08-17T00:00:00+01:002023-08-17T00:00:00+01:00João Alvestag:jpralves.net,2023-08-17:post/2023/08/17/als162-an-alternative-to-dcf77-time-radio-with-arduino-uno.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM433_Als162AnAlternativeToDcf77Time_t.jpg" /></p><p>“ALS162, as DCF77, are time radio transmitters in Europe. ALS162 has the advantage having an excellent immunity from electromagnetic noise Story Before the world of the internet and GPS, the way to set the same time throughout a country was …</p>

2023-08-17T00:00:00+01:002023-08-17T00:00:00+01:00João Alvestag:jpralves.net,2023-08-17:post/2023/08/17/arduino-infrared-camera.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM433_ArduinoInfraredCamera_t.jpg" /></p><p>“Do you know how you see those cheap telescopes at the department store? The box has beautiful pictures that probably came from the Hubble. What you will see is somewhat different. You have to carefully look at [upir’s] Arduino …</p>

2023-08-17T00:00:00+01:002023-08-17T00:00:00+01:00João Alvestag:jpralves.net,2023-08-17:post/2023/08/17/catcube-internet-clock.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM433_CatcubeInternetClock_t.jpg" /></p><p>“Hey everyone, and welcome back. This is CATCUBE, a miniature cube-shaped desk clock with a cat theme that was created entirely from scratch and has an ESP8266 module for a brain. A desk clock like this one pulls time readings …</p>

2023-08-17T00:00:00+01:002023-08-17T00:00:00+01:00João Alvestag:jpralves.net,2023-08-17:post/2023/08/17/diy-customized-8x8-led-matrix-tutorial-max7219-meets-arduino.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM433_DiyCustomized8X8LedMatrixTutor_t.jpg" /></p><p>“In this step-by-step tutorial, we’re diving into the world of electronics and microcontrollers to create a personalized 8 by 8 LED matrix that can be controlled using an Arduino board. I’m Chris, and I’ll walk you through …</p>

2023-08-17T00:00:00+01:002023-08-17T00:00:00+01:00João Alvestag:jpralves.net,2023-08-17:post/2023/08/17/diy-simple-arduino-emf-electromagnetic-field-detector.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM433_DiySimpleArduinoEmfElectromagn_t.jpg" /></p><p>“The emf detector described in this video has a minimal number of components, it is simple to make, and does not require any tuning An EMF (electromagnetic field) meter is a device used to measure electromagnetic radiation in a given …</p>

2023-08-17T00:00:00+01:002023-08-17T00:00:00+01:00João Alvestag:jpralves.net,2023-08-17:post/2023/08/17/higher-or-lower-arduino-game.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM433_HigherOrLowerArduinoGame_t.jpg" /></p><p>“This first ever Arduino project of mine is a simple card game where you are given a card from a standard deck of cards and you need to guess whether the next card will be either higher, lower or equal …</p>

2023-08-17T00:00:00+01:002023-08-17T00:00:00+01:00João Alvestag:jpralves.net,2023-08-17:post/2023/08/17/iot-based-greenhouse-monitoring-control-system.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM433_IotBasedGreenhouseMonitoringCo_t.jpg" /></p><p>“A remotely controlled Greenhouse System using Blynk, NodeMCU-12E and Arduino. Greenhouses are temperature-controlled environments in which plants are grown. Because of self-restriction, current greenhouse plants cannot be controlled remotely and must instead be operated manually using a variety of documents …</p>

2023-08-17T00:00:00+01:002023-08-17T00:00:00+01:00João Alvestag:jpralves.net,2023-08-17:post/2023/08/17/lazy-7-mini.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM433_Lazy7Mini_t.jpg" /></p><p>“Hi all, yes. Another 7 segment clock. But this one turned out too nice to be thrown away and it finally replaces my old “Tiny Edition” design with something I’m a bit more… uhm… less unhappy about. Actually I …</p>

2023-08-17T00:00:00+01:002023-08-17T00:00:00+01:00João Alvestag:jpralves.net,2023-08-17:post/2023/08/17/lm386-ic-audio-amplifier.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM433_Lm386IcAudioAmplifier_t.jpg" /></p><p>“This is how you can make audio amplifier using LM368 ic Supplies list of components :) - 1)LM386 ic × 1 2)1000uf capacitor × 1 3)100uf capacitor × 2 4)0.1uf ceramic capacitor (cap num)104 × 1 5)Male audio jack …</p>

2023-08-17T00:00:00+01:002023-08-17T00:00:00+01:00João Alvestag:jpralves.net,2023-08-17:post/2023/08/17/sadd-sleep-apnea-detection-device.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM433_SaddSleepApneaDetectionDevice_t.jpg" /></p><p>“A device that tracks, records, and alerts users to instances of potential sleep apnea via audio, visual, and vibrational systems. Sleep Apnea threatens the lives and proper respiratory function of up to 20% of the global population, says The National …</p>

2023-08-17T00:00:00+01:002023-08-17T00:00:00+01:00João Alvestag:jpralves.net,2023-08-17:post/2023/08/17/stealthy-infrared-human-proximity-and-movement-module.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM433_StealthyInfraredHumanProximity_t.jpg" /></p><p>“A concealed stealth gadget that senses movement of any object that gives off IR radiation, i.e. humans, animals, etc, and blinks rapidly. A device with stealth, military, and fun applications, this human proximity sensor is a stealth gadget equipped …</p>

2023-08-17T00:00:00+01:002023-08-17T00:00:00+01:00João Alvestag:jpralves.net,2023-08-17:post/2023/08/17/tracing-the-roots-of-the-8086-instruction-set-to-the-datapoint-2200-minicomputer.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM433_TracingTheRootsOfThe8086Instru_t.jpg" /></p><p>“The Intel 8086 processor started the x86 architecture that is still extensively used today. The 8086 has some quirky characteristics: it is little-endian, has a parity flag, and uses explicit I/O instructions instead of just memory-mapped I/O. It …</p>

2023-08-17T00:00:00+01:002023-08-17T00:00:00+01:00João Alvestag:jpralves.net,2023-08-17:post/2023/08/17/ultra-low-powered-linux-computer-running-on-microcontrollers.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM433_UltraLowPoweredLinuxComputerRu_t.jpg" /></p><p>“A portable computer that runs on a Linux operating system can fit in your pocket. Linux is a family of open-source operating systems that are based on the Linux kernel, which is a core program that manages the communication between …</p>

2023-08-17T00:00:00+01:002023-08-17T00:00:00+01:00João Alvestag:jpralves.net,2023-08-17:post/2023/08/17/using-pin-multiplexing-to-reduce-pin-usage-on-8-bit-microcontrollers.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM433_UsingPinMultiplexingToReducePi_t.jpg" /></p><p>“This post will cover two examples of using multiplexing on General Purpose Input/Output (GPIO) pins to reduce a project’s pin usage. The first example uses the technique “Charlieplexing” and the second uses timing peripherals and interrupts to quickly …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/a-close-look-at-the-8086-processors-bus-hold-circuitry.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_ACloseLookAtThe8086ProcessorSB_t.jpg" /></p><p>“The Intel 8086 microprocessor (1978) revolutionized computing by founding the x86 architecture that continues to this day. One of the lesser-known features of the 8086 is the “hold” functionality, which allows an external device to temporarily take control of the …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/ai-audio-classifier-recycle-bin.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_AiAudioClassifierRecycleBin_t.jpg" /></p><p>“Recycle Bin that sorts rubbish based on the sound of collision using Edge AI audio classification. According to the Commonwealth Scientific and Industrial Research Organisation (CSIRO) in NSW, it is predicted that about 50% of all waste could be recycled …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/arduino-customized-l298m-dual-motor-driver-module.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_ArduinoCustomizedL298MDualMoto_t.jpg" /></p><p>“The project is a design of an LM298 Dual DC motor driver used to drive DC and stepper motors. It is a design done in KiCAD. The Arduino Customized L298M Dual Motor Driver Module is designed to handle high-power DC …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/arduino-dcf77-radio-clock-receiver.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_ArduinoDcf77RadioClockReceiver_t.jpg" /></p><p>“In this tutorial we will learn how to use the DCF77 Radio Clock module using Arduino to display the date and time on the LCD display. What You Will Need: - Arduino UNO (or any other Arduino or ESP) - Optional LCD …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/atmega128rfa1-dev-board-hookup-tutorial.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_Atmega128Rfa1DevBoardHookupTut_t.jpg" /></p><p>“This project documents the development board’s schematic and hardware layout. An ATmega128RFA1 board has the following features; Arduino-compatible with R3 Form Factor Onboard chip antenna 33 Digital I/Os SPI, TWI, and UART interfaces 8 Analog Inputs (10-bit) 16 …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/atmega328p-shield-for-quick-prototyping-on-breadboards.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_Atmega328PShieldForQuickProtot_t.jpg" /></p><p>“There are many situations in which you want to replace an Arduino board for an Atmega328P chip, which is cheaper and more compact. However, using an Atmega328P can be inconvenient, since you need to wire up the power, UART, reset …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/back-to-the-future-lamp-clock.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_BackToTheFutureLampClock_t.jpg" /></p><p>“Originally, I started from the “high part”, the “simple logo lamp”. Then I thought: “Shouldn’t I add a Back to the Future clock, in the style?” And that’s it ! On the back, you’ll see a small button …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/build-your-own-object-following-4-dof-robotics-arm.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_BuildYourOwnObjectFollowing4Do_t.jpg" /></p><p>“In this project, the robotic arm will execute actions corresponding to the commands received from the sensors. Greetings everyone, and welcome to my Instructables tutorial. Today, I’ll guide you through the process of creating an Object Tracking 4-DOF …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/cobra-reflex-coach.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_CobraReflexCoach_t.jpg" /></p><p>“Unleash your reflex potential with Cobra, the ultimate coach for lightning-fast responses and unmatched agility. Strike first, conquer all. Advantages of Training Reflexes Training reflexes offers a series of advantages and benefits in both daily life and various sports fields …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/diy-433mhz-4-channels-wireless-switcher-circuit-arduino.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_Diy433Mhz4ChannelsWirelessSwit_t.jpg" /></p><p>“DIY 433MHz 4-Channels Wireless Switcher Circuit (Arduino) 433MHz/315MHz remote controls are everywhere around us, used to control devices such as turning ON/OFF the lights or a TV, or in applications such as opening/closing parking or villa entrance …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/diy-gps-module-for-yaesu-vx-8drvx-8de-handheld-transceiver.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_DiyGpsModuleForYaesuVx8DrVx8De_t.jpg" /></p><p>“GPS module for Yaesu VX-8DR/DE handheld transceivers with ublox NEO-6M chip and Arduino Nano by Dmitry Melnichansky 4Z7DTF (4X5DM since June 2016 4X1MD since July 24, 2017). Overview When I was buying my Yaesu VX-8DE, I …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/diy-rotating-led-display-arduino-at-its-best.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_DiyRotatingLedDisplayArduinoAt_t.jpg" /></p><p>“CD-sized device showing online time & weather data. Wirelessly powered and controlled, Using Arduino and ESP-01s. Easy to assemble. 1. Description of the device The Rotating Display device comprises two primary units: a power supply unit and a display …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/esp-ota-dashboard.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_EspOtaDashboard_t.jpg" /></p><p>“Update and monitor ESP8266/ESP32 devices with OTA server and user friendly WEB UI. Welcome to our state-of-the-art OTA server, a revolutionary platform that sets a new standard in efficiency and user-friendliness. With a robust WEB UI at its core …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/esp32-powered-tabletop-kinetic-sand-drawing-robot.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_Esp32PoweredTabletopKineticSan_t.jpg" /></p><p>“In 2020, back when I had just started my sophomore year of high school, I built a very basic sand plotter robot that drew patterns in sand. Three years later, I wanted to use the skills that I have taught …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/fix-water-level-sensor-accuracy-now.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_FixWaterLevelSensorAccuracyNow_t.jpg" /></p><p>“Achieve Perfect Accuracy for Your Water Tank. Step 1: Assemble the Circuit Start by connecting your Arduino board to the computer using the USB cable. Then, create the circuit by following these steps: Connect the VCC pin of the water …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/handheld-basic-computer-in-badge-format-with-the-arduino-uno.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_HandheldBasicComputerInBadgeFo_t.jpg" /></p><p>“Since the new 32-Bit Arduino Uno R4 has arrived, it is time to make a glorious farewell project to the classic 8-Bit UNO R3, by using all the pins and turning it into a handheld BASIC computer, quite similar to …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/harmonic-sounds-a-symphony-of-sustainable-recycling.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_HarmonicSoundsASymphonyOfSusta_t.jpg" /></p><p>“In a world grappling with environmental challenges, innovative solutions that merge cutting-edge technology with sustainability are the need Story The AI Audio Classifier Recycle Bin is an innovative project that combines artificial intelligence and smart recycling technology. The goal of …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/heartbeat-sensor-based-on-arduino-uno.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_HeartbeatSensorBasedOnArduinoU_t.jpg" /></p><p>“This article introduces the combination of Arduino and NUO heartbeat sensor for the application of real-time heart rate monitoring. In this article, we present an Arduino-based heartbeat detection and monitoring system that utilizes a pulse sensor to measure the heart …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/home-automation.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_HomeAutomation_t.jpg" /></p><p>“Home Automation Using Bluetooth In this Instructables, I am going to make an home automation project to control my home appliances with my smart phone(android phone) via Bluetooth. Here In my study room there are four electrical appliance’s …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/how-to-use-lm35-temerature-sensor.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_HowToUseLm35TemeratureSensor_t.jpg" /></p><p>“Here is the tutorial that explains how to use LM35 temperature sensor. I hope you find it usefull. Apart from instruction on how to use this sensor, I am also showing how you can engage AI powered by chatGPT to …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/iot-solution-for-co2-measurement-in-the-office.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_IotSolutionForCo2MeasurementIn_t.jpg" /></p><p>“Sick of stuffy conference rooms and co-workers that won’t let you open the window? Here is the solution. Being in an office environment often exposes us to high levels of CO2. Sometimes, when sitting in a crowded office space …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/ironos-flexible-soldering-iron-control-firmware.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_IronosFlexibleSolderingIronCon_t.jpg" /></p><p>“This repository was formerly known as TS100, it’s the same great code. Just with more supported devices. Originally conceived as an alternative firmware for the TS100, this firmware has evolved into a complex soldering iron control firmware. The firmware …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/light-tracker-bot.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_LightTrackerBot_t.jpg" /></p><p>“Arduino interfaced with a couple of photo resistors (LDR), mounted over servo motor tracks light and makes an angular motion toward it. Light Tracker Bot: The operation is based on the photoconductive property of Light Dependent Resistors (LDRs). LDRs are …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/make-simple-raspberry-pi-pico-weather-station-with-hexabitz.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_MakeSimpleRaspberryPiPicoWeath_t.jpg" /></p><p>“Join me as I unveil the secrets of designing a simple yet powerful weather station using Raspberry Pi Pico and Hexabitz. Introduction: Embark on a journey to create a weather station like no other! Join me as I unveil the …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/making-a-cassette-recorder.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_MakingACassetteRecorder_t.jpg" /></p><p>“Making an AC Bias Tape Recorder(Cassette Recorder) To record new audio tracks on Magnetic Tape. Introduction Hello everyone! in my previous tutorial, I showed you how you can make an AC Bias Tape recorder or Cassette recorder. So You …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/morse-code-over-wifi.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_MorseCodeOverWifi_t.jpg" /></p><p>“From a client on the local network, I can send a message to a PSoC6 BT/WLAN board and the led blinks the message in Morse code. The project simply blinks the onboard LED to represent a message in Morse …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/multi-purpose-io-card.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_MultiPurposeIoCard_t.jpg" /></p><p>“When you need a bunch of buttons. encoders and a display when designing your next project, but don’t want the mess of a breadboard. When we are working on a prototype, we always need access to pushbuttons, encoders and …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/mysoltrk-a-solar-tracker-reinvented.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_MysoltrkASolarTrackerReinvente_t.jpg" /></p><p>“A different approach for a solar tracker, alternative movements, to be installed on the outside, to recharge devices We want to create a new, different version of solar tracker, to increase the yield of solar panels. Our challenge is create …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/orb-sessed-led-sphere.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_OrbSessedLedSphere_t.jpg" /></p><p>“What’s better than a cube of 150 LED pixels? Why, a sphere of 150 LED pixels! “Squaring the circle” is a mathematical challenge as old as geometry itself. The “Cube Orb” LED sphere inverts that goal and takes it …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/ov7670-camera-and-image-sensor-with-nano-33-ble.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_Ov7670CameraAndImageSensorWith_t.jpg" /></p><p>“Use the OV7670 Camera and Image sensor with an Arduino Nano 33 BLE to take pictures and convert them to.PNG format. The OV7670 is an image sensor that can be used to capture pictures when controlled by a microprocessor …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/overengineered-pen-holder-20.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_OverengineeredPenHolder20_t.jpg" /></p><p>“Made a new version of PEN Holder with few features The goal was to create a pen stand that was entirely different from the typical pen stand. It would have a number of features, such as a room temperature and …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/poetic-ticks-ai-clock-using-rpi-pico-w5100s-and-chatgpt.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_PoeticTicksAiClockUsingRpiPico_t.jpg" /></p><p>“A Raspberry Pi Pico based device displaying time, temperature, and ChatGPT-generated poems or jokes at set intervals. Introduction Poetic Ticks is an innovative and multi-functional device that marries the practicality of a digital clock and thermometer with the whimsy of …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/power-pi.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_PowerPi_t.jpg" /></p><p>“This is Power Pi, a lightweight, integrated Raspberry Pi Dock that powers the Pi wirelessly thanks to an internal lithium cell battery pack. In essence, this setup is a Raspberry Pi Case with an integrated power module. The goal of …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/rht-device-relative-humidity-and-temperature-sensor.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_RhtDeviceRelativeHumidityAndTe_t.jpg" /></p><p>“RHT Device is a very simple relative humidity and temperature sensor that shows the data in the screen. The project was chosen to test the I2C communication of the PIC18F14k50. Supplies: You will need the following components (For V1 revision …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/simple-sensitive-3-transistors-bfo-metal-detector.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_SimpleSensitive3TransistorsBfo_t.jpg" /></p><p>“If properly adjusted according to the instructions, it is able to detect a small coin at a distance of 15 cm In this project I will present you a Very Simple “Beat Frequency Oscillator” type of Metal Detector. BFO metal …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/sine-wave-generator.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_SineWaveGenerator_t.jpg" /></p><p>“trigonometry, arduino, interesting, and funny!! can you do it? This project visualizes a sinusoidal function on an OLED screen, and a LED can simulate these fluctuations, with a bit of trigonometry. It is easy to understand the code, although the …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/smartwatch-firmware-for-the-lilygo-t-wrist-e-paper-esp32-development-board.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_SmartwatchFirmwareForTheLilygo_t.jpg" /></p><p>“qpaperOS is a smartwatch firmware implementation for the LILYGO T-Wrist E-Paper ESP32 development board. This repositoy houses the qpaperOS source code along with 3D models and the FreeCAD file of the smartwatch case to make your very own qpaper! qpaper …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/split-mechanical-low-profile-keyboard-using-arduino-pro-micro.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_SplitMechanicalLowProfileKeybo_t.jpg" /></p><p>“Background I wanted a standalone keyboard to use with my laptop, which with its small keyboard, pushes my hands together and forces my wrists to bend uncomfortably. I had this idea after learning that the Pro Micro, with its ATmega32U4 …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/tennis-for-two.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_TennisForTwo_t.jpg" /></p><p>“Resurrecting Tennis for Two, a video game from 1958. This is arguably the first documented video game. In the year 1958 – fourteen years before the 1972 debut of Pong — a physicist named William Higinbotham demonstrated a remarkable video game called …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/the-dashboy-camera.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_TheDashboyCamera_t.jpg" /></p><p>“A digital camera made from the Mitsubishi M64282FP artificial retina and a Raspberry Pi Pico. The project fully emulates the sensor management strategy of the Game Boy Camera while completely bypassing the MAC-GBD mapper, which means you can record …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/the-ultimate-noise-box.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_TheUltimateNoiseBox_t.jpg" /></p><p>“A feature-laden, high tech DIY version of the popular white noise box used for enhancing sleep or relaxation. This project was designed to create a white noise/relaxation machine with rarely-seen features: - Produces CD-quality stereophonic audio. - Uses real audio …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/touch-cam-a-raspberry-pi-camera.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_TouchCamARaspberryPiCamera_t.jpg" /></p><p>“Touch Cam - A 3D Printed Raspberry Pi Camera The Touch Cam is a redesigned and enhanced version of the Pi Cam - A Raspberry Pi Desktop Camera Server, integrating a touch display and touch sensor for an intuitive and interactive user …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/transparent-oled-test-board-with-xiao.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_TransparentOledTestBoardWithXi_t.jpg" /></p><p>“A simple XIAO-Powered board for Transparent OLED Screen Greetings everyone and welcome to the future. This is a transparent OLED display that works as a regular SSD1306-like display, but we can see through it, and this is actually …</p>

2023-08-10T00:00:00+01:002023-08-10T00:00:00+01:00João Alvestag:jpralves.net,2023-08-10:post/2023/08/10/zx-spectrum-expansion-system-recreated.html

<p><img alt="" src="https://jpralves.net/imgt/2023/08/PM432_ZxSpectrumExpansionSystemRecre_t.jpg" /></p><p>“An Interface One / Microdrive Emulation for the ZX Spectrum This device plugs into the back of a 48K ZX Spectrum and provides the functionality of the original 1984 “ZX Spectrum Expansion System”. It emulates a ZX Interface One with 8 …</p>

2023-07-20T00:00:00+01:002023-07-20T00:00:00+01:00João Alvestag:jpralves.net,2023-07-20:post/2023/07/20/bo-motor-with-encoder-gives-precise-movement.html

<p><img alt="" src="https://jpralves.net/imgt/2023/07/PM429_BoMotorWithEncoderGivesPrecise_t.jpg" /></p><p>“To precisely control the BO motor or to make any low cost project using PID we can consider this types of encoder integration with motors. Geared Dc motors are used in a lot of hobby projects like in making some …</p>

2023-07-20T00:00:00+01:002023-07-20T00:00:00+01:00João Alvestag:jpralves.net,2023-07-20:post/2023/07/20/diy-8-mechanical-numpad-with-arduino-compatible-firmware.html

<p><img alt="" src="https://jpralves.net/imgt/2023/07/PM429_Diy8MechanicalNumpadWithArduin_t.jpg" /></p><p>“A few months ago, I developed and open source the 4xMacropad, a $3 macropad made using CH552G. After seeing much of the feedback from the internet, I notice I can better utilize this chip to make a keyboard with more …</p>

2023-07-20T00:00:00+01:002023-07-20T00:00:00+01:00João Alvestag:jpralves.net,2023-07-20:post/2023/07/20/dust-utilization-segregation-transmission-bin.html

<p><img alt="" src="https://jpralves.net/imgt/2023/07/PM429_DustUtilizationSegregationTran_t.jpg" /></p><p>“A dustbin, which is smart enough to segregate waste based on if material is metallic, non-metallic, dry or wet. SO it’s a smart bin which can segregate wastes based on if it’s a metal, non metal, dry or …</p>

2023-07-20T00:00:00+01:002023-07-20T00:00:00+01:00João Alvestag:jpralves.net,2023-07-20:post/2023/07/20/hash-latch.html

<p><img alt="" src="https://jpralves.net/imgt/2023/07/PM429_HashLatch_t.jpg" /></p><p>“Hash functions are used for lots of things. Like, verifying the data integrity, mining various cryptocurrencies, etc. I’ve found another application for them - serving as an integral part of the digital lock. The hash latch generates keys in a …</p>

2023-07-20T00:00:00+01:002023-07-20T00:00:00+01:00João Alvestag:jpralves.net,2023-07-20:post/2023/07/20/how-to-display-and-set-numbers-with-7-segment-display-and-joystick.html

<p><img alt="" src="https://jpralves.net/imgt/2023/07/PM429_HowToDisplayAndSetNumbersWith7_t.jpg" /></p><p>“This project uses a 4-digit seven segment to display numbers, a joystick to change/set the numbers and a buzzer to alert the user. Many measuring devices, such as kitchen scale, voltmeter, clock, thermometer and speedometer, require numerical displays. For …</p>

2023-07-20T00:00:00+01:002023-07-20T00:00:00+01:00João Alvestag:jpralves.net,2023-07-20:post/2023/07/20/how-to-make-a-simple-seismograph.html

<p><img alt="" src="https://jpralves.net/imgt/2023/07/PM429_HowToMakeASimpleSeismograph_t.jpg" /></p><p>“In this tutorial, I present the construction of a seismograph with simple materials and available to anyone. Since I had the mechanical support left over from the previous project (Music box), I built the mechanical gears using the same components …</p>

2023-07-20T00:00:00+01:002023-07-20T00:00:00+01:00João Alvestag:jpralves.net,2023-07-20:post/2023/07/20/line-follower-with-esp32-cam-l0cost-robot-controller.html

<p><img alt="" src="https://jpralves.net/imgt/2023/07/PM429_LineFollowerWithEsp32CamL0Cost_t.jpg" /></p><p>“The line follower robot is a basic step in robot construction and the cheapest construction kits offer an introduction which can operate as intended, or as documented here, be upgraded to something more sophisticated. This is an instructable to demonstrate …</p>

2023-07-20T00:00:00+01:002023-07-20T00:00:00+01:00João Alvestag:jpralves.net,2023-07-20:post/2023/07/20/neck-watch-pico-zerocyberpunk.html

<p><img alt="" src="https://jpralves.net/imgt/2023/07/PM429_NeckWatchPicoZeroCyberpunk_t.jpg" /></p><p>“This is a neckband watch that can see the time, see pictures, show Text Moving, show Gif animations. Style cyberpunk It is another dream that I want to design a watch for my own use in my own way. Therefore …</p>

2023-07-20T00:00:00+01:002023-07-20T00:00:00+01:00João Alvestag:jpralves.net,2023-07-20:post/2023/07/20/simple-arduino-hulda-clark-zapper-with-timer-function.html

<p><img alt="" src="https://jpralves.net/imgt/2023/07/PM429_SimpleArduinoHuldaClarkZapperW_t.jpg" /></p><p>“The device presented in this video generates a signal identical to that of the original Zapper, but is made using a microcontroller Hulda Clark was a controversial alternative health practitioner who claimed that the use of a device called the …</p>

2023-07-20T00:00:00+01:002023-07-20T00:00:00+01:00João Alvestag:jpralves.net,2023-07-20:post/2023/07/20/smart-powermeter.html

<p><img alt="" src="https://jpralves.net/imgt/2023/07/PM429_SmartPowermeter_t.jpg" /></p><p>“Welcome to the documentation page of the Smart Powermeter, an electronic board based on the ESP32 with the target of monitoring the real-time consumption of AC sources. It can be powered from a source so it can be mounted on …</p>

2023-07-20T00:00:00+01:002023-07-20T00:00:00+01:00João Alvestag:jpralves.net,2023-07-20:post/2023/07/20/the-thing-that-goes-clack-and-ding.html

<p><img alt="" src="https://jpralves.net/imgt/2023/07/PM429_TheThingThatGoesClackAndDing_t.jpg" /></p><p>“A keyboard add-on that makes your mechanical keyboard even more noisy I like mechanical keyboards and my coworkers joked my current keyboard wasn’t loud enough. So, I made the clacker. It’s built on a Teensy 4.1. In …</p>

2023-07-20T00:00:00+01:002023-07-20T00:00:00+01:00João Alvestag:jpralves.net,2023-07-20:post/2023/07/20/toddlers-cyberdeck.html

<p><img alt="" src="https://jpralves.net/imgt/2023/07/PM429_ToddlerSCyberdeck_t.jpg" /></p><p>“I’m building a cyberdeck for my son. He just turned 2. My son likes to press buttons and flip switches. If there’s a remote, he grabs it. Windshield wipers in the car? ON. Power switch? ON OFF ON …</p>

2023-07-20T00:00:00+01:002023-07-20T00:00:00+01:00João Alvestag:jpralves.net,2023-07-20:post/2023/07/20/undocumented-8086-instructions-explained-by-the-microcode.html

<p><img alt="" src="https://jpralves.net/imgt/2023/07/PM429_Undocumented8086InstructionsEx_t.jpg" /></p><p>“What happens if you give the Intel 8086 processor an instruction that doesn’t exist? A modern microprocessor (80186 and later) will generate an exception, indicating that an illegal instruction was executed. However, early microprocessors didn’t include the circuitry …</p>

2023-07-20T00:00:00+01:002023-07-20T00:00:00+01:00João Alvestag:jpralves.net,2023-07-20:post/2023/07/20/variable-voltage-power-module.html

<p><img alt="" src="https://jpralves.net/imgt/2023/07/PM429_VariableVoltagePowerModule_t.jpg" /></p><p>“Powering my projects can be a challenge. This may be my future go-to solution… Powering electronics projects are always challenging. This Variable voltage Power Module was designed to solve such a problem for a specific project that I am working …</p>

2023-07-20T00:00:00+01:002023-07-20T00:00:00+01:00João Alvestag:jpralves.net,2023-07-20:post/2023/07/20/w5100s-poe-evb-picopoe-development-board-for-rp2040.html

<p><img alt="" src="https://jpralves.net/imgt/2023/07/PM429_W5100SPoeEvbPicoPoeDevelopment_t.jpg" /></p><p>“Ethernet Development Board for Raspberry Pi RP2040 with POE Capability. I often use W5100S-EVB-PICO, this time I want to add POE (Power over Ethernet) function to W5100S-EVB-PICO while maintaining the original compatibility and keeping the size …</p>

2023-07-20T00:00:00+01:002023-07-20T00:00:00+01:00João Alvestag:jpralves.net,2023-07-20:post/2023/07/20/workday-progressbar-with-google-calendar-integration.html

<p><img alt="" src="https://jpralves.net/imgt/2023/07/PM429_WorkdayProgressbarWithGoogleCa_t.jpg" /></p><p>“Follow this exciting tutorial to create your own visual workday scheduler using a Raspberry Pi Pico and an LED strip. I’m delighted to introduce you to a captivating project I recently discovered on GitHub, to which I’m now …</p>

2023-07-13T00:00:00+01:002023-07-13T00:00:00+01:00João Alvestag:jpralves.net,2023-07-13:post/2023/07/13/arduino-analog-digital-compass-with-hmc5883l-sensor.html

<p><img alt="" src="https://jpralves.net/imgt/2023/07/PM428_ArduinoAnalogDigitalCompassWit_t.jpg" /></p><p>“Electronic version of the Compass, where the position of the needle is indicated by group of a three light-emitting diodes. Compass is device used for navigation and orientation, and consists of a magnetic needle that is mounted on a pivot …</p>

2023-07-13T00:00:00+01:002023-07-13T00:00:00+01:00João Alvestag:jpralves.net,2023-07-13:post/2023/07/13/arduino-rolling-ball-kitchen-timer.html

<p><img alt="" src="https://jpralves.net/imgt/2023/07/PM428_ArduinoRollingBallKitchenTimer_t.jpg" /></p><p>“I have always been facinated by rolling ball clocks and when I saw JBV Creatives “Rolling Ball Escapement” demo I just had to build it into a working project. This is a general purpose kitchen timer and uses a 3D …</p>

2023-07-13T00:00:00+01:002023-07-13T00:00:00+01:00João Alvestag:jpralves.net,2023-07-13:post/2023/07/13/gesture-based-home-automation-using-bolt-iot.html

<p><img alt="" src="https://jpralves.net/imgt/2023/07/PM428_GestureBasedHomeAutomationUsin_t.jpg" /></p><p>“Gesture-Based Home Automation using Bolt IoT brings convenience and interactivity to home automation. The inception of this project began with a moment of inspiration while observing advancements in smart home technology. Witnessing the seamless integration of automation and human interaction …</p>

2023-07-13T00:00:00+01:002023-07-13T00:00:00+01:00João Alvestag:jpralves.net,2023-07-13:post/2023/07/13/mini-tetris-rp2040-beginner-project.html

<p><img alt="" src="https://jpralves.net/imgt/2023/07/PM428_MiniTetrisRp2040BeginnerProjec_t.jpg" /></p><p>“My plan was to test the RP2040 microcontroller from the Raspberry Foundation in combination with the Arduino IDE and the Arduino C++ framework and I needed a evaluation project for that. I decided to program a simple tetris game in …</p>

2023-07-13T00:00:00+01:002023-07-13T00:00:00+01:00João Alvestag:jpralves.net,2023-07-13:post/2023/07/13/nerdy-clock-binary-clock-using-pico-w.html

<p><img alt="" src="https://jpralves.net/imgt/2023/07/PM428_NerdyClockBinaryClockUsingPico_t.jpg" /></p><p>“In this project, we’ll be using a Raspberry Pi Pico and some LEDs to create our own binary clock. Why make your own binary clock? Well, for one thing, it’s a fun and nerdy way to display the …</p>

2023-07-13T00:00:00+01:002023-07-13T00:00:00+01:00João Alvestag:jpralves.net,2023-07-13:post/2023/07/13/picodebugger.html

<p><img alt="" src="https://jpralves.net/imgt/2023/07/PM428_Picodebugger_t.jpg" /></p><p>“The PicoDebugger project is an extension the Raspberry Pi Foundations PicoProbe project. The basis of the PicoProbe is to use a Raspberry Pi Pico to act as a debug probe for another Pico. There are two elements to this project …</p>

2023-07-13T00:00:00+01:002023-07-13T00:00:00+01:00João Alvestag:jpralves.net,2023-07-13:post/2023/07/13/reverse-engineering-the-8086-processors-address-and-data-pin-circuits.html

<p><img alt="" src="https://jpralves.net/imgt/2023/07/PM428_ReverseEngineeringThe8086Proce_t.jpg" /></p><p>“The Intel 8086 microprocessor (1978) started the x86 architecture that continues to this day. In this blog post, I’m focusing on a small part of the chip: the address and data pins that connect the chip to external memory …</p>

2023-07-13T00:00:00+01:002023-07-13T00:00:00+01:00João Alvestag:jpralves.net,2023-07-13:post/2023/07/13/simple-3d-printed-magnetic-stir-plate.html

<p><img alt="" src="https://jpralves.net/imgt/2023/07/PM428_Simple3DPrintedMagneticStirPla_t.jpg" /></p><p>“A simple 3D printed magnetic stir plate for agitating and mixing solutions, or ambient temperature microbial cultures(eg. yeast starter culture, sprirulina culture). Low-cost and simple assembly. Design was made with Fusion360 Supplies - 3D printer - hot glue gun - PWM speed …</p>

2023-07-13T00:00:00+01:002023-07-13T00:00:00+01:00João Alvestag:jpralves.net,2023-07-13:post/2023/07/13/stripboard-oscilloscope-mkii.html

<p><img alt="" src="https://jpralves.net/imgt/2023/07/PM428_StripboardOscilloscopeMkii_t.jpg" /></p><p>“How to improve on the stripboard oscilloscope we built in the last article. In the previous project we built a super cheap oscilloscope on stripboard (aka Veroboard) using a Raspberry Pi Pico, an LM358 op-amp and some passive components. In …</p>

2023-07-06T00:00:00+01:002023-07-06T00:00:00+01:00João Alvestag:jpralves.net,2023-07-06:post/2023/07/06/antique-lantern-project.html

<p><img alt="" src="https://jpralves.net/imgt/2023/07/PM427_AntiqueLanternProject_t.jpg" /></p><p>“Hello everyone, and welcome back. Now for something BRIGHT, a retrofitted antique-looking oil lamp with four LEDs that are turned ON and OFF in a chaser pattern to provide the appearance of fire flickering. The Attiny 13A driving four SMD …</p>

2023-07-06T00:00:00+01:002023-07-06T00:00:00+01:00João Alvestag:jpralves.net,2023-07-06:post/2023/07/06/braillerap-diy-braille-embosser.html

<p><img alt="" src="https://jpralves.net/imgt/2023/07/PM427_BraillerapDiyBrailleEmbosser_t.jpg" /></p><p>“An Open source Braille embosser in the spirit of RepRap A full documented and reproducible cheap DIY Braille embosser, with software ecosystem. Based on a 3D printer board (MKS from Makerbase), BrailleRAP can emboss dots anywhere on a A4 sheet …</p>

2023-07-06T00:00:00+01:002023-07-06T00:00:00+01:00João Alvestag:jpralves.net,2023-07-06:post/2023/07/06/c64-cartridge-on-a-stripboard.html

<p><img alt="" src="https://jpralves.net/imgt/2023/07/PM427_C64CartridgeOnAStripboard_t.jpg" /></p><p>“In this article I’ll explain how to make a self-booting cartridge for the Commodore 64 using an 8-bit microcontroller on a stripboard. Background People ask me why the Commodordion boots from a tape drive emulator, which takes a couple …</p>

2023-07-06T00:00:00+01:002023-07-06T00:00:00+01:00João Alvestag:jpralves.net,2023-07-06:post/2023/07/06/cpu-clock-module-with-single-step.html

<p><img alt="" src="https://jpralves.net/imgt/2023/07/PM427_CpuClockModuleWithSingleStep_t.jpg" /></p><p>“Simplified version of Ben Eater’s breadboard clock with chip count reduced from 6 to 3. I use this clock with my 6502 and Z80 projects. Simplified version of Ben Eater’s Clock Module For experimenting with retro CPUs like …</p>

2023-07-06T00:00:00+01:002023-07-06T00:00:00+01:00João Alvestag:jpralves.net,2023-07-06:post/2023/07/06/hardware-ci-arena.html

<p><img alt="" src="https://jpralves.net/imgt/2023/07/PM427_HardwareCiArena_t.jpg" /></p><p>“We develop Electric UI with standardised hardware targets to iterate quickly with common ‘known good’ hardware. During testing on some internal projects, we would occasionally discover differences in device discovery behaviour, connection reliability, and even found a few minor bugs …</p>

2023-07-06T00:00:00+01:002023-07-06T00:00:00+01:00João Alvestag:jpralves.net,2023-07-06:post/2023/07/06/how-to-make-a-raspberry-pi-pico-bluetooth-control-car.html

<p><img alt="" src="https://jpralves.net/imgt/2023/07/PM427_HowToMakeARaspberryPiPicoBluet_t.jpg" /></p><p>“A Raspberry Pi Pico Project. In this project, we will utilize a Bluetooth module receiver to receive commands from mobile. Based on the received commands, the car will perform corresponding actions. For instance, pressing the forward button on the mobile …</p>

2023-07-06T00:00:00+01:002023-07-06T00:00:00+01:00João Alvestag:jpralves.net,2023-07-06:post/2023/07/06/piccolobasic.html

<p><img alt="" src="https://jpralves.net/imgt/2023/07/PM427_Piccolobasic_t.jpg" /></p><p>“A BASIC interpreter for the Raspberry Pi Pico (i.e. BASIC for microcontrollers) Features - Let, if, print, for, goto, gosub - String variables (let z$=”hello”) - Floating point numbers and variables (let z#=1.234) - Builtin functions [zero, randint, not, time …</p>

2023-07-06T00:00:00+01:002023-07-06T00:00:00+01:00João Alvestag:jpralves.net,2023-07-06:post/2023/07/06/seven-segment-display-do-it-yourself.html

<p><img alt="" src="https://jpralves.net/imgt/2023/07/PM427_SevenSegmentDisplayDoItYoursel_t.jpg" /></p><p>“By soldering separate LEDs together and using Charlieplexing you can control the display with only four digital pins. Usually, when you need some numerical output, it takes you at least seven pins of your microcontroller (except you use a display …</p>

2023-07-06T00:00:00+01:002023-07-06T00:00:00+01:00João Alvestag:jpralves.net,2023-07-06:post/2023/07/06/space-invaders-on-the-uno-r4-wifi-led-matrix.html

<p><img alt="" src="https://jpralves.net/imgt/2023/07/PM427_SpaceInvadersOnTheUnoR4WifiLed_t.jpg" /></p><p>“A quick and dirty space invaders game for the Uno R4 WiFi LED Matrix I wrote a simple version of Space Invaders for the Uno R4 WiFi! It uses 3 pushbuttons connected between GND and A0, A1, and A2 for …</p>

2023-07-06T00:00:00+01:002023-07-06T00:00:00+01:00João Alvestag:jpralves.net,2023-07-06:post/2023/07/06/wearable-qwerty-keyboard.html

<p><img alt="" src="https://jpralves.net/imgt/2023/07/PM427_WearableQwertyKeyboard_t.jpg" /></p><p>“I want to make wearable and portable computing more practical, but keyboards must be on-screen or carried in a backpack. Exotic models, e.g., chording keyboards, require relearning to type. A simple solution is to build something with a familiar …</p>

2023-06-29T00:00:00+01:002023-06-29T00:00:00+01:00João Alvestag:jpralves.net,2023-06-29:post/2023/06/29/amazon-echo-pop-turned-into-1960-ish-science-fiction-talking-computer-terminal.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM426_AmazonEchoPopTurnedInto1960Ish_t.jpg" /></p><p>“Having watched many science fiction movies over my lifetime, I was a bit disappointed when smart speakers were released in form factors designed to make them inconspicuous. Where were the flashing lights that accompanied Colossus of the Forbin Project fame …</p>

2023-06-29T00:00:00+01:002023-06-29T00:00:00+01:00João Alvestag:jpralves.net,2023-06-29:post/2023/06/29/an-i2c-matrix-keypad.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM426_AnI2CMatrixKeypad_t.jpg" /></p><p>“This is part 2 of my “more reliable keypad”. In order to reduce the number of required IO Lines to drive the keypad, use I2C.. n a previous post this month I introduced my 4×4 matrix keypad. That keypad …</p>

2023-06-29T00:00:00+01:002023-06-29T00:00:00+01:00João Alvestag:jpralves.net,2023-06-29:post/2023/06/29/angle-measurement-kit2go.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM426_AngleMeasurementKit2Go_t.jpg" /></p><p>“Let’s have a look at how you could start measuring angles using the TLE5012Kit2Go Introduction Greetings fellow makers! When thinking about any fancy project, you might almost certainly require some input. This input could potentially be a button, a …</p>

2023-06-29T00:00:00+01:002023-06-29T00:00:00+01:00João Alvestag:jpralves.net,2023-06-29:post/2023/06/29/automatic-irrigation-and-plant-watering-system.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM426_AutomaticIrrigationAndPlantWat_t.jpg" /></p><p>“The watering system using Arduino and soil moisture sensor. Also, we can control the water supply automatically through this system. In this project, we will build an automatic plant watering system using a soil moisture sensor and Arduino. The soil …</p>

2023-06-29T00:00:00+01:002023-06-29T00:00:00+01:00João Alvestag:jpralves.net,2023-06-29:post/2023/06/29/beagleplay-nodered.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM426_BeagleplayNodered_t.jpg" /></p><p>“Use NodeRed to make a UI dashboard visual of your output! Hello Everybody! This will be a simple starter project to get you adjusted to NodeRed. I am a beginner, so hopefully my tutorial and tips will help you. This …</p>

2023-06-29T00:00:00+01:002023-06-29T00:00:00+01:00João Alvestag:jpralves.net,2023-06-29:post/2023/06/29/building-your-own-motion-detecting-messenger.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM426_BuildingYourOwnMotionDetecting_t.jpg" /></p><p>“Motion Detecting Messenger using ESP32 Camera & BME280. Story In this project we’ll create a Telegram bot for the ESP32-CAM AI-Thinker board with a PIR motion sensor, a BME280 temperature (humidity and pressure sensor). For this we will …</p>

2023-06-29T00:00:00+01:002023-06-29T00:00:00+01:00João Alvestag:jpralves.net,2023-06-29:post/2023/06/29/diy-simple-gu81-tube-hybrid-amplifier-130-watts-rms-in-a-class.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM426_DiySimpleGu81TubeHybridAmplifi_t.jpg" /></p><p>“The amplifier described in this project is “Hybrid”, but now the case is reversed and the Tube is used at the output, thus preserving all the positive features of a pure Tube Amplifier. Supplies: - GU81 Vacuum Tube - Microwave oven Trafo …</p>

2023-06-29T00:00:00+01:002023-06-29T00:00:00+01:00João Alvestag:jpralves.net,2023-06-29:post/2023/06/29/espboy-walkie-talkie-module.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM426_EspboyWalkieTalkieModule_t.jpg" /></p><p>“The ESPboy Walkie-Talkie module uses SA868 transceiver allows you to use your ESPboy as an Walkie-Talkie radio. You can buy this module ready-made or make it yourself. Parts: 1.1 SA868 module 1.2 LTK5128 amplifier board 1.3 MAX9814 …</p>

2023-06-29T00:00:00+01:002023-06-29T00:00:00+01:00João Alvestag:jpralves.net,2023-06-29:post/2023/06/29/how-to-make-a-small-desk-clock-with-weather-station.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM426_HowToMakeASmallDeskClockWithWe_t.jpg" /></p><p>“Hi beloved readers in this project I will show you how to make this Small Desk Clock with Weather Station This is a step-by-step article, I will guide you through the process of creating your very own desk clock using …</p>

2023-06-29T00:00:00+01:002023-06-29T00:00:00+01:00João Alvestag:jpralves.net,2023-06-29:post/2023/06/29/how-to-monitor-and-manage-mpp-solar-inverter.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM426_HowToMonitorAndManageMppSolarI_t.jpg" /></p><p>“How to Monitor and Manage MPP Solar (Voltronic Axpert) Hybrid Inverter/Solar Battery Charger with Enapter EMS Toolkit and ESP32. Few time ago I decided to put some efforts for building my small solar power plant. The main purposes were …</p>

2023-06-29T00:00:00+01:002023-06-29T00:00:00+01:00João Alvestag:jpralves.net,2023-06-29:post/2023/06/29/improved-ad9833-function-generator.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM426_ImprovedAd9833FunctionGenerato_t.jpg" /></p><p>“Build a function generator with an ATtiny3216 micro, a AD9833 Programmable Waveform Generator and digitally controlled amplitude. Recently I built a function generator based around a AD9833 module. In that project I used the blue variant. This is the basic …</p>

2023-06-29T00:00:00+01:002023-06-29T00:00:00+01:00João Alvestag:jpralves.net,2023-06-29:post/2023/06/29/interface-ds1307-rtc-module-with-arduino-display-datetime-on-oled.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM426_InterfaceDs1307RtcModuleWithAr_t.jpg" /></p><p>“In this tutorial, we will explore how to interface the DS1307 RTC module with an Arduino UNO. We will begin by addressing several key questions: What exactly is an RTC (Real-time clock)? Why is an RTC module used? How does …</p>

2023-06-29T00:00:00+01:002023-06-29T00:00:00+01:00João Alvestag:jpralves.net,2023-06-29:post/2023/06/29/iot-internet-of-tunnel-using-riotos-and-esp32.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM426_IotInternetOfTunnelUsingRiotos_t.jpg" /></p><p>“IoT project consisting in a smart tunnel prototype. The system uses an ESP32 board, RiotOS, AWS and various sensors and actuators Brief description Internet Of Tunnel project is a Monitoring System solution designed to monitor and maintain the air quality …</p>

2023-06-29T00:00:00+01:002023-06-29T00:00:00+01:00João Alvestag:jpralves.net,2023-06-29:post/2023/06/29/mini-retro-tv.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM426_MiniRetroTv_t.jpg" /></p><p>“This instructables show how to make a mini retro TV. Note: This TV cannot receive analog TV broadcast signal but can play mini video tape (micro SD card). Supplies Below list only provide the searching keyword and product image, you …</p>

2023-06-29T00:00:00+01:002023-06-29T00:00:00+01:00João Alvestag:jpralves.net,2023-06-29:post/2023/06/29/remotely-query-sensor-data-via-sms.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM426_RemotelyQuerySensorDataViaSms_t.jpg" /></p><p>“Learn how to use text messaging to report on remote sensor data with Twilio and the Blues Notecard. Story They say the “next big thing” for the IoT is Machine Learning, but the “current big thing” is cloud dashboards. Gorgeous …</p>

2023-06-29T00:00:00+01:002023-06-29T00:00:00+01:00João Alvestag:jpralves.net,2023-06-29:post/2023/06/29/room-temp-meter-with-arduino-nano-and-aht10.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM426_RoomTempMeterWithArduinoNanoAn_t.jpg" /></p><p>“A simple TEMP and Humidity Meter with simple Arduino Nano and SSD1306 with AHT10 Sensor. Here’s something super useful: a simple room TEMPERATURE and HUMIDITY measurement setup that uses an AHT10 sensor connected to the Arduino Nano, An SSD1306 …</p>

2023-06-29T00:00:00+01:002023-06-29T00:00:00+01:00João Alvestag:jpralves.net,2023-06-29:post/2023/06/29/water-leakage-detection-system-2.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM426_WaterLeakageDetectionSystem_t.jpg" /></p><p>“How to use an Esp32 to detect water leakages, building a prototype, simulating the code on Iot-Lab and interacting with AWS Introduction Today irrigation does often not keep into account possible water leaks from watering pipes. This superficial management is …</p>

2023-06-22T00:00:00+01:002023-06-22T00:00:00+01:00João Alvestag:jpralves.net,2023-06-22:post/2023/06/22/advanced-esp32-internet-weather-station-with-5-day-forecast.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM425_AdvancedEsp32InternetWeatherSt_t.jpg" /></p><p>“This is a beautiful weather station on which data is taken from Opeweathermap site where you can create a free API key Story A weather station typically includes sensors that measure various environmental factors, and data collected by these sensors …</p>

2023-06-22T00:00:00+01:002023-06-22T00:00:00+01:00João Alvestag:jpralves.net,2023-06-22:post/2023/06/22/attiny13-diy-electronics-earrings.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM425_Attiny13DiyElectronicsEarrings_t.jpg" /></p><p>“This project will certainly make her happier! Here I share the full making steps as well as the needed documents for Electronics DIY earring powered by a small Battery. What you will learn here: - Circuit design of small board layout …</p>

2023-06-22T00:00:00+01:002023-06-22T00:00:00+01:00João Alvestag:jpralves.net,2023-06-22:post/2023/06/22/attinytrng.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM425_Attinytrng_t.jpg" /></p><p>“ATtinyTRNG - True Random Number Generator Cor van Wandelen 6-2023 A small, cheap generic True Random Number Generator has been made by combining two random sources on a ATtiny85 board. Purpose: This True Random Number Generator produces high quality non-deterministic random …</p>

2023-06-22T00:00:00+01:002023-06-22T00:00:00+01:00João Alvestag:jpralves.net,2023-06-22:post/2023/06/22/battery-powered-wireless-tetris-console-pair.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM425_BatteryPoweredWirelessTetrisCo_t.jpg" /></p><p>“I wanted to experiment with a 64x64 rgb led panel. So I decided to make a portable battery-powered console, with at least one game on it. Then I realized that game must be Tetris. Then I realized I could make …</p>

2023-06-22T00:00:00+01:002023-06-22T00:00:00+01:00João Alvestag:jpralves.net,2023-06-22:post/2023/06/22/beerconnect.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM425_Beerconnect_t.jpg" /></p><p>“Connected Tap Machine, works with RFID badge links to an account on a Virtual Machine. Use LoRa and Node-RED for datas processing. What is it? Imagine you have an automated beer machine, a bit like an automatic coffee machine …</p>

2023-06-22T00:00:00+01:002023-06-22T00:00:00+01:00João Alvestag:jpralves.net,2023-06-22:post/2023/06/22/ble-to-ethernet-central-with-rp2040w5100s.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM425_BleToEthernetCentralWithRp2040_t.jpg" /></p><p>“This project aims to demonstrate how to turn Pico W into BLE-to-Ethernet central using WIZnet W5100S Introduction Few days ago Raspberry Pi released new SDK that added missing feature to Pico W - Bluetooth support. For more information please refer …</p>

2023-06-22T00:00:00+01:002023-06-22T00:00:00+01:00João Alvestag:jpralves.net,2023-06-22:post/2023/06/22/build-a-path-following-self-driving-vehicle-using-an-arduino-portenta-h7-and-computer-vision.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM425_BuildAPathFollowingSelfDriving_t.jpg" /></p><p>“This is a difficult build and may need some adaptations for your project: For example, we used a large print-bed 3D printer to make the 10.5 inch long frame (26.7 cm). You may choose to split that frame …</p>

2023-06-22T00:00:00+01:002023-06-22T00:00:00+01:00João Alvestag:jpralves.net,2023-06-22:post/2023/06/22/connected-rainwater-collector.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM425_ConnectedRainwaterCollector_t.jpg" /></p><p>“Discover our connected rainwater collector, an ingenious device combining Node-RED, LoRa and Arduino to intelligently manage and monitor you What is your project about? The subject of my project is the design and production of a connected rainwater collector …</p>

2023-06-22T00:00:00+01:002023-06-22T00:00:00+01:00João Alvestag:jpralves.net,2023-06-22:post/2023/06/22/digital-protractor.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM425_DigitalProtractor_t.jpg" /></p><p>“10 Magnets and 2 Hall effect sensors form a angle encoder which is used to measure angles that are displayed on a OLED screen. Story Recently on Instructables, lingib demonstrated a angle encoder using 10 magnets and 2 hall effect …</p>

2023-06-22T00:00:00+01:002023-06-22T00:00:00+01:00João Alvestag:jpralves.net,2023-06-22:post/2023/06/22/electric-vehicle-charge-robot-lite.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM425_ElectricVehicleChargeRobotLite_t.jpg" /></p><p>“Hi everyone! My name is Tyler Erwin and I’m a senior at San Jose State University majoring in Mechanical Engineering with a minor in Robotics. I was joined on this project by Michael Kamas, Julia Casares-Iglesias, Charlie Nino, and …</p>

2023-06-22T00:00:00+01:002023-06-22T00:00:00+01:00João Alvestag:jpralves.net,2023-06-22:post/2023/06/22/esp-32-based-8x8x8-rgb-led-cube.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM425_Esp32Based8X8X8RgbLedCube_t.jpg" /></p><p>“Hi Everyone! My name is John Lukito, and I’m a second-year student at Binus University studying Computer Engineering. I am thrilled to be working on this project alongside my talented peers, Michael Angelo Chandra and Johevin Blesstowi, who are …</p>

2023-06-22T00:00:00+01:002023-06-22T00:00:00+01:00João Alvestag:jpralves.net,2023-06-22:post/2023/06/22/hidpanel.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM425_Hidpanel_t.jpg" /></p><p>“This is a customizable HID controller for game panels. The HIDPanel has positions for up to 15 plug in control modules. These modules can be single buttons, button pairs, rotary encoders, rotary potentiometers, slide potentiometers, and dual axis joysticks (PS4 …</p>

2023-06-22T00:00:00+01:002023-06-22T00:00:00+01:00João Alvestag:jpralves.net,2023-06-22:post/2023/06/22/illuminatesky-luminous-umbrella.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM425_IlluminateskyLuminousUmbrella_t.jpg" /></p><p>“The Luminous Umbrella allows you to create a magical and colorful spectacle over your head to stand out from the crowd or enhance your mood. Story The “Luminous Umbrella” design is an innovative umbrella that is equipped with luminous LEDs …</p>

2023-06-22T00:00:00+01:002023-06-22T00:00:00+01:00João Alvestag:jpralves.net,2023-06-22:post/2023/06/22/laser-security-alarm.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM425_LaserSecurityAlarm_t.jpg" /></p><p>“How to Make a Laser Security Alarm at Home In this project, we will guide you step-by-step on how to make a laser security alarm using simple and easily available components. This security alarm will help you protect your home …</p>

2023-06-22T00:00:00+01:002023-06-22T00:00:00+01:00João Alvestag:jpralves.net,2023-06-22:post/2023/06/22/model-rocket-launch-controller-handheld.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM425_ModelRocketLaunchControllerHan_t.jpg" /></p><p>“This is a handheld model rocket launch controller with 3D printed game controller like handles. I designed it with through hole components so that younger scouts could solder it on their own. Cost is about $15 per unit when made …</p>

2023-06-22T00:00:00+01:002023-06-22T00:00:00+01:00João Alvestag:jpralves.net,2023-06-22:post/2023/06/22/neopixel-oled-clock-with-ntp.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM425_NeopixelOledClockWithNtp_t.jpg" /></p><p>“This page describes building and programming NeoPixel / OLED clock driven by NTP based on: Raspberry PI Pico W SSD1306 128x64 OLED display 24x RGB LED NeoPixel circle Ø65, WS2812B 24x RGB LED NeoPixel circle Ø85, WS2812B Optional microSD slot for …</p>

2023-06-22T00:00:00+01:002023-06-22T00:00:00+01:00João Alvestag:jpralves.net,2023-06-22:post/2023/06/22/remoteduino-nano.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM425_RemoteduinoNano_t.jpg" /></p><p>“Tiny DIY programmable IR remote that’s based off the arduino uno (backwards compatible with my orginal Remoteduino project)! Basically a more refined version 2 of my original Remoteduino project, which was an arduino compatible programmable IR remote. The nano …</p>

2023-06-22T00:00:00+01:002023-06-22T00:00:00+01:00João Alvestag:jpralves.net,2023-06-22:post/2023/06/22/star-wars-inspired-diy-volumetric-display.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM425_StarWarsInspiredDiyVolumetricD_t.jpg" /></p><p>“The goal of my project was to create a kind of DIY volumetric display that can be built at home with available components for makers. Introduction A volumetric display is a graphical display device that creates a visual representation of …</p>

2023-06-22T00:00:00+01:002023-06-22T00:00:00+01:00João Alvestag:jpralves.net,2023-06-22:post/2023/06/22/stripboard-oscilloscope.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM425_StripboardOscilloscope_t.jpg" /></p><p>“A 500kS/s oscilloscope built on stripboard using basic parts Introduction In the previous guide we described how to create a simple oscilloscope on a breadboard using a Raspberry Pi Pico W (or Pico) and the Scoppy Android app. Here …</p>

2023-06-22T00:00:00+01:002023-06-22T00:00:00+01:00João Alvestag:jpralves.net,2023-06-22:post/2023/06/22/ultra-small-ethernet-rp2040-board-production-record.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM425_UltraSmallEthernetRp2040BoardP_t.jpg" /></p><p>“WIZNET W5100S + Seeed Studio XIAO-RP2040 Summary I have done a lot of projects related to RP2040. We always used the Pico board to proceed. I used a lot of W5100S-EVB-Pico, an Ethernet-enabled board in Pico. Now, I …</p>

2023-06-22T00:00:00+01:002023-06-22T00:00:00+01:00João Alvestag:jpralves.net,2023-06-22:post/2023/06/22/ventbot-a-diy-home-hvac-vent-booster-warm-side-cool-cool-side-warm.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM425_VentbotADiyHomeHvacVentBooster_t.jpg" /></p><p>“Do you have rooms in your house that are colder than other rooms in the winter? If you have air conditioning, are those same rooms warmer than other rooms in the summer? It’s common for that to happen to …</p>

2023-06-15T00:00:00+01:002023-06-15T00:00:00+01:00João Alvestag:jpralves.net,2023-06-15:post/2023/06/15/agricultural-iot-with-lorawan-and-8-bit.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM424_AgriculturalIotWithLorawanAnd8_t.jpg" /></p><p>“Build an easy-to-deploy, low-power sensor node that monitors growing conditions and transmits data offsite where it’s securely accessible Story I. Background Water conservation has become increasingly important for farms in the southwest, as more and more restrictions are enacted …</p>

2023-06-15T00:00:00+01:002023-06-15T00:00:00+01:00João Alvestag:jpralves.net,2023-06-15:post/2023/06/15/arduino-controlled-832-max7219-dot-matrix-led-display.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM424_ArduinoControlled832Max7219Dot_t.jpg" /></p><p>“In this comprehensive guide, we will explore how to effectively employ the 8×32 MAX7219 Dot Matrix LED Display with an Arduino. This LED matrix module, equipped with the MAX7129 LED driver, is fully compatible with Arduino boards and other …</p>

2023-06-15T00:00:00+01:002023-06-15T00:00:00+01:00João Alvestag:jpralves.net,2023-06-15:post/2023/06/15/arduino-cyclone-game-strip-led-step-by-step.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM424_ArduinoCycloneGameStripLedStep_t.jpg" /></p><p>“In this tutorial, I will teach you how to make a simple and fun handheld cyclone game for arduino beginners inspired by retro portable game consoles. This is a reflex game. There are 4 difficulty levels. The aim is to …</p>

2023-06-15T00:00:00+01:002023-06-15T00:00:00+01:00João Alvestag:jpralves.net,2023-06-15:post/2023/06/15/bios-post-code-reader-with-the-raspberry-pi-pico.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM424_BiosPostCodeReaderWithTheRaspb_t.jpg" /></p><p>“Introduction You can make your own POST card (BIOS POST code reader) using the Raspberry Pi Pico. It can also be used as an LPC bus sniffer. I covered everything about the LPC bus for reading POST codes in the …</p>

2023-06-15T00:00:00+01:002023-06-15T00:00:00+01:00João Alvestag:jpralves.net,2023-06-15:post/2023/06/15/black-swan-v20.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM424_BlackSwanV20_t.jpg" /></p><p>“The Black Swan V2.0 is an ESP32-based, secure, one-way communication channel. It utilizes a sophisticated encryption algorithm combined with the integrity verification feature to ensure the confidentiality, integrity, and authenticity of the data being transmitted through it. Once …</p>

2023-06-15T00:00:00+01:002023-06-15T00:00:00+01:00João Alvestag:jpralves.net,2023-06-15:post/2023/06/15/crius-wireless-sound-reactive-rgb-led-panel-ws2812b.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM424_CriusWirelessSoundReactiveRgbL_t.jpg" /></p><p>“The Crius Wireless RGB LED Panel is designed to be portable and wireless so it’s based on a DFRobot ESP32 IOT Development board (Firebeetle v4.0) that is equiped both with bluetooth and Wifi and also with an onboard …</p>

2023-06-15T00:00:00+01:002023-06-15T00:00:00+01:00João Alvestag:jpralves.net,2023-06-15:post/2023/06/15/custom-uninterruptable-power-supply-full-design-with-prototypes.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM424_CustomUninterruptablePowerSupp_t.jpg" /></p><p>“Hello. In this instructable, I would like to share with you the joy (and a little bit of struggle) of designing my own uninterruptible power supply. I will try to present you the whole design process, my thoughts, mistakes, and …</p>

2023-06-15T00:00:00+01:002023-06-15T00:00:00+01:00João Alvestag:jpralves.net,2023-06-15:post/2023/06/15/diy-homework-writing-machine.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM424_DiyHomeworkWritingMachine_t.jpg" /></p><p>“In this Instructable, I’ll show you how to create a completely functional 3D-printed writing machine for your science fair project at school or college. This project was created as part of my second-year engineering project at Gujarat’s Chandubhai …</p>

2023-06-15T00:00:00+01:002023-06-15T00:00:00+01:00João Alvestag:jpralves.net,2023-06-15:post/2023/06/15/electronic-puzzle-cube.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM424_ElectronicPuzzleCube_t.jpg" /></p><p>“This is the Technological Tesseract—an electronic puzzle box. The goal of this puzzle is to connect three wires to the jacks in the correct configuration to make the LED matrix light up in a fun way. There are four …</p>

2023-06-15T00:00:00+01:002023-06-15T00:00:00+01:00João Alvestag:jpralves.net,2023-06-15:post/2023/06/15/lora-powered-solar-pv-monitoring-system-with-blues-qubitro.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM424_LoraPoweredSolarPvMonitoringSy_t.jpg" /></p><p>“Will guide you to build a LoRa E5-powered solar PV monitoring system with Blues cellular IoT and Qubitro cloud. LoRa is a wireless network solution that emerged in the field of IoT. It is a low-power and wide-area network with …</p>

2023-06-15T00:00:00+01:002023-06-15T00:00:00+01:00João Alvestag:jpralves.net,2023-06-15:post/2023/06/15/low-cost-usb-sniffer-lsfshs-with-wireshark-interface.html

<p><img alt="" src="https://jpralves.net/imgt/2023/06/PM424_LowCostUsbSnifferLsFsHsWithWir_t.jpg" /></p><p>“This sniffer can be used standalone from a command line or as a plugin for Wireshark with direct control from the UI. The sniffer is based around Cypress CY7C68013A MCU, Lattice LCMXO2 FPGA, and Microchip USB3343 USB PHY. Prices and …</p>