The X and Y axes can use your choice of analog inputs A0, A1, A2 and A3; the buttons can use digital inputs 6, 7, 8, or 9. This flexibility ensures maximum compatibility by letting you avoid pin ...

This is an Arduino library that enables you attach an interrupt to any pin of Arduino Uno, Nano, Mini and other 328-based boards. The Arduino attachInterrupt () function only allows pines 2 & ~3.

Arduino-compatible ATtinys with more pins Having had such quick success making a microcontroller project using an 8pin ATtiny85 and programming it with Arduino, I though I would try a more elaborate ...

I did the same with the thermistor and photoresistor, but connected those to pin A1 and pin A2, respectively.

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.