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6V – 2.5Ah Sealed Lead-Acid Battery Charger

“This dual-level float charger was designed for a 6V (three 2V cells) 2.5Ah battery. D2 LED was added for visual indication of charge completion, D3 indicates power, D4 LED presents overcharge condition, etc. 6V lead-acid battery charger is built …

A Two Wheel Gimbal Motor Powered Robot

“This is a robot that I’ve been playing with for a few months. It moves by turning its wheels against a pendulum weight and controlling its speed using feedback from a tilt sensor. It was inspired by a video …

ADXL345 accelerometer “screen orientation”

“A while ago I saw a hourglass project online that I thought would be nice to build, after the tribulations of sourcing some missing files and getting the project to compile I found I didn’t have the right accelerometer …

Arduino Nano 33 IoT 12V WS2811 LED Strip Controller

“This project uses the Arduino Nano 33 IoT, the Arduino IoT Cloud, E13.1 (streaming DMX) and Alexa to control 12 volt WS2811 LEDs. Last year I realized that the safest way to display lights for the holidays would be …

Bluetooth RPM Letterboard v2.0

“Second iteration of a Rapid Prompting Method (RPM) letterboard with capacitive touch sensors & Bluetooth connectivity In a nutshell (full story in the prototype link): The Rapid Prompting Method (RPM) is a technique developed as a vehicle for non-verbal autistic children …

CircuitPython 7.1.0 Released! @circuitpython

“This is CircuitPython 7.1.0, the latest minor revision of CircuitPython, and is a new stable release. Notable additions to 7.1.0 since 7.0.0 - Initial port for Raspberry Pi Broadcom-based boards. - Preliminary support for asyncio cooperative …

CoreXZ Puzzle Pipe Plotter

“Today, I’d like to share how to build at home a CoreXZ puzzle pipe plotter. It is called “puzzle pipe” CNC because I put pieces of pipe fittings together in a logical way, in order to arrive at the …

DIY Simple BME280 Arduino Weather Station

“Super simple Weather station containing only two components. This time I will show you how to make a simple home weather station. The measured values are displayed on an 8 by 32 dots Led display consisting of four 8 by …

Domino Stack Bot

“Pushing over dominoes is a satisfying activity with an excellent visual effect, but first, we need to stack and align the small pieces manually, which is a very long and tedious process. We have a solution, we built a robot …

ESP01 Project Using Blynk IFTTT & Google Assistant

“Make an ESP01 Project using Blynk IFTTT to control a 2-channel relay module with the Google Assistant. (Circuit + Source Code) In this IoT project, I have shown how to make an ESP01 Project using Blynk IFTTT to control a 2-channel …