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Use DLP 3D Printer To Etch A PCB

“In this tutorial, we will use a DLP printer to expose the circuit layout on a photosensible film over a copper board. Then, we will use acid to etch the PCB and see the results. DLP printer should give us …

Wooden Chest Air Quality Monitor

“A compact air quality, temperature and humidity monitor enclosed in a small wooden chest, with a four-row LCD display. A project completed to measure the air condition in a diesel polluted building. Then the final design enclosed in a wooden …

Yet Another Smallest Regulated Boost SMPS (No SMD)

“Full project name: Yet another world’s smallest regulated boost DC to DC converter switch mode power supply using THT (through hole technology) and no SMD (surface mounted device) OK, ok, You got me. Maybe it is not smaller than …

3.3V Mod for Ultrasonic Sensors (prepare HC-SR04 for 3.3V Logic on ESP32/ESP8266, Particle Photon, Etc.)

“TL;DR: On the sensor, cut the trace to the Echo pin, then re-connect it using a voltage divider (Echo trace -> 2.7k -> Echo pin -> 4.7k -> GND).If you are anything like me, you have come to know and …

3D bioprinting of living structures with built-in chemical sensors

“BIOPRINTNING A new method enables non-invasive monitoring of oxygen metabolism in cells that are 3D bioprinted into complex living structures. This has great implications for studies of cell growth and interactions e.g. under tissue-like conditions, as well as for …

A New Brain-Inspired Architecture Could Improve How Computers Handle Data and Advance AI

“IBM researchers designed a new computer architecture with co-located memory and processing. In studies, their prototype ran 200 times faster than conventional computers. IBM researchers are developing a new computer architecture, better equipped to handle increased data loads from artificial …

A ‘Recipe Book’ that Creates Color Centers in Silicon Carbide Crystals

“Researchers are documenting the different temperature and proton dosages required to make defects that will further allow silicon carbide to be used for quantum technology. Silicon carbide (SiC), a material known for its toughness with applications from abrasives to car …

A self-powered heart monitor taped to the skin

“Scientists have developed a human-friendly, ultra-flexible organic sensor powered by sunlight, which acts as a self-powered heart monitor. Previously, they developed a flexible photovoltaic cell that could be incorporated into textiles. In this study, they directly integrated a sensory device …

Ariadne Headband

“Arduino-based heaband that uses haptic feedback to navigate blind people. Controlled via Bluetooth using Android app. Ariadne Headband is ongoing project that aims to create haptic navigation for blind people (among others). It uses 4 vibration motors placed in set …

Atari 5200 Sony PS2 Controller Adapter

“I already built a nifty handheld controller, and I should be enjoying my retro gaming experiences, but I couldn’t help building something new, so here is a PS2-to-Atari5200 adapter Purpose This adapter allows you to use a PS2 …