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Logging 2 Electricity Smart Meters Using Arduino Nano Every

“This project describes how to log electricity consumption of 2 different consumer circuits by reading the corresponding 2 smart meters (“eHz”=”elektronische Haushaltszähler”) simultaneously to an SD card. It all started wanting to get a better understanding of electricity consumption …

Multi-channel Wifi Voltage & Current Meter

“When breadboarding, one often needs to monitor different parts of the circuit at once. To avoid the pain having to stick the multimeter probes from one place to another, I wanted to design a multi-channel voltage and current meter. The …

No-contact IR Thermometer

“My local Department of Health got in touch with me because they needed a way to track the body temperature of their employee’s health on a daily basis during the 2020 Covid-19 crisis. Normal, off the shelf IR thermometers …

Open Hardware Remake of the Commodore Amiga 500+ Mainboard

“Rämixx500 is an Open Hardware remake of the Commodore Amiga 500+ mainboard, revision 8A.1. Many Amiga 500+ computers are suffering an early death because of the built-in barrel battery that powers their internal real-time clocks. Such batteries have long …

Pcb Speaker V2

“I recently made an interesting wireless speaker project that was a finalist in the PCB competition. You can check this post by clicking here and the video as I created by clicking here. I used PCB for this, which I …

Reverse-engineering the TL431: the most common chip you’ve never heard of

“A die photo of the interesting but little-known TL431 power supply IC provides an opportunity to explore how analog circuits are implemented in silicon. While the circuit below may look like a maze, the chip is actually relatively simple and …

RGB LED Matrices with CircuitPython

“Bring a little bit of Times Square into your home with our RGB LED matrix panels. These panels are normally used to make video walls — here in New York we see them on the sides of buses and on bus …

Shield for Arduino From Old Russian VFD Tubes: Clock, Thermometer, Volt Meter…

“This project took almost half a year to complete. I cannot describe how much work went into this project. Doing this project alone would take me forever so I had some help from my friends. Here you can see our …

simplyRetro-D8

“This repository contains everything to rebuild the simplyRetro D8. The D8 is my first attempt to build a small custom bartop from scratch.”

Smart 3D Printer Filament Counter

“Why bother counting filament? A few reasons: Successful prints require a properly-calibrated extruder: when the gcode tells the extruder to move the filament 2mm, it needs to move exactly 2mm. Bad things happen if it over-extrudes or under-extrudes. A well-calibrated …