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“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 …
“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 …
“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 …
“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 …
“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 …
“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 …
“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 …
“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 …
“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 …
“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 …