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. The ExtraCore library comes ...

The Arduino IDE uses #defines to define things like I/O pin numbers, modes, and other things. You can also create your own headers and #defines. Headers can be included in other files - in other ...

Often, when it comes to your Arduino project,you never have enough input/output (I/O) pins on your Arduino Microcontroller. The addition of your favorite LCD display, a bunch of blinkers, beepers and ...

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 Arduino code ...