ᕲ Duino-Coin is a coin that can be mined with almost everything, including Arduino boards.
Ferret is a free software lisp implementation for real time embedded control systems.
Arduino (8-bit AVR) simulator, written in JavaScript and runs in the browser / Node.js
Electronic Lead Screw for metal lathe
Software for USB-connected relays with HID interface. See the WIKI for more info.
Tiny Software Protocol for communication over UART, SPI, etc
Arduino TM16xx library for LED & KEY and LED Matrix modules based on TM1638, TM1637, TM1640 and similar chips. Simply use print() on 7-segment and use Adafruit GFX on matrix.
Small version of the famous component tester from mikrocontroller.net
Fast Graphics Library for Attiny85 and SSD1306 over I2c
Arduino library to read VCC supply level without external components
Bare ATmega 8/168/328 microcontrollers with the Arduino IDE.
Library for Arduino and ATmega series processors to read the processor's Vcc voltage and percentage of capacity (for battery based projects) using *absolutely* no external components or connections!
Source code for the popular SwinSID SID replacement
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