OLED-Boy, a mini OLED game console based on ATmega328P

This is an open source work by netizen aziddy, based on the classic Adafruit Feather 328P development board (the MCU master is Microchip's ATmega328P) and a mini electronic game console with a 128x64 OLED screen

ArduPilot: Open source flight control APM and PIXHAWK (schematic and source code)

APM (ArduPilotMega) is a flight control product launched by the DIY Drones community in 2007. It is the most mature open source hardware project today.

Schematic PCB

Zhihuijun produces portable pocket monitor & power bank

Zhihui Jun designed and produced a portable pocket monitor (& power bank) to solve personal pain points. There is no room for improvement in terms of appearance~

Schematic PCB

ESP8266 multi-function ink screen

Arduino development, weather, clock, reading, network distribution and other functions

Schematic PCB

Open source micro-racing car based on ESP32H2, inspired by Mario Kart

This is a fun electronic toy car that features power-ups! The author uses color sensors and magnetic switches to trigger fun tricks like acceleration, deceleration, and rotation. It draws a lot of inspiration from Mario Kart.

After a failed Kickstarter campaign, the author has now open-sourced the software, hardware, and mechanics.

Schematic PCB

Frequency Probe - an ultra-miniature frequency probe

An ultra-mini frequency probe designed by foreign expert David Johnson. This frequency probe can help you debug the circuit by displaying frequency and voltage. It can measure periodic waveforms from 1Hz to 5MHz with an accuracy of 0.3%. Of course, it can also be used as a voltmeter. Use it to tell you the current voltage value.

Schematic PCB

Design and implementation source code of solar power generation simulation system based on TMS320F28335

Design and implementation of solar power generation simulation system based on TMS320F28335

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6-digit handheld open source multimeter

Software and hardware are all open source

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Software and hardware open source portable monitor CatSniffer (schematic diagram, PCB, source code, etc.)

This board is a Swiss Army Knife for IoT security researchers, developers, and enthusiasts. The board can be used with different types of software, including third-party sniffers such as SmartRF Packet Sniffer, Sniffle, zigbee2mqtt, Z-Stack-firmware, Ubiqua Protocol Analyzer, our custom firmware, or you can even Specific software requires writing your own software.

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Open source EtherCAT servo driver board design

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An open source project to recreate classic Casio watches

The Sensor Watch is unlike most smartwatches.

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PIKOCUBE - WiFi-controlled programmable dice composed of 54 LEDs

This dice mainly consists of an ESP8285-01F, six PCBs and 54 LEDs. Its structural design is very clever, and the exquisiteness of the structure is also reflected in the production process.

Schematic PCB

Protues simulation example (8051)-stepper motor control

Protues simulation example (8051)-stepper motor control.rar

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Protues simulation example (8051) - playing music

Protues simulation example (8051) - playing music

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STM32 OpenSource Multimeter - an open source multimeter suitable for DIY entry

An open source multimeter design based on STM32F1/F3, with dual-range V/I, RMS measurement, continuity, component testing and other functions. The author has made all design files open source, which is very suitable for DIY entry.

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Fluke 17b multimeter schematic diagram

Fluke 17b multimeter schematic diagram

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Rodeostat: Potentiometer for electrochemistry, fully open source

It's all open source, and their documentation is very detailed, which is a rare learning material.

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PYPRCA: python programmable open source calculator based on Raspberry Pi PICO, developed using circuitpython

Pocket calculator style general purpose programmable device (computer) ideal for learning programming and improving building/soldering skills.

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Teacher ChaN’s AC load analyzer

Supports voltage, current, effective power, apparent power, power factor, frequency, and harmonic component display.

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Using STM32F072 to regulate the pocket experimental power supply of TX4211 and SY6345

Cruelfox, a forum expert, has updated his article to share with you an experimental idea of ​​a CNC experimental power supply. The power supply uses two domestic chips, with a 3,000-word detailed explanation. He briefly talked about the first experimental power supply he made, whose shell was an aluminum medicine box and whose knob was a toothpaste cap. He mainly talked about the ideas and principles of the current mini PCB pocket version.

Schematic PCB