Enter the ExtraCore library for Arduino, a software library that turns two or more Arduinos into a multi-core microcontroller with more pins than you’ll ever need.

[Trent M. Wyatt]’s CPUVolt library provides a fast way to measure voltage using no external components, and no I/O pin. It only applies to certain microcontrollers, but he provides example Ar… ...

Running out of GPIO pins? Learn how to connect multiple buttons to just one Arduino pin using clever wiring and resistor techniques. Perfect for compact projects, keyboards, or when using small ...

The Stage Bench uses an Arduino Uno, which interacts with two matrices: a 128-LED matrix and a 128-button matrix, via a pair of shields. This setup provides a visually engaging and highly ...

1. Materials Needed: Besides the IKEA coffee table and the Adafruit components, you’ll need some basic tools and materials such as a soldering iron, wires, and a USB power source.