But if you just want to add in some buttons without reaching for an extra IC you’ll love this hack. [John Boxall] shows how to add four buttons using one ADC pin. The concept is nothing new.

[Kevin Fodor] shares his method of reading multiple inputs on one pin of a microcontroller ... that provides a unique voltage value for each button pushed. The only real drawback is that the ...

However, these two areas are where the Arduino Mega shines. It's built with 256 KB of flash memory and over 50 pins, perfect for managing larger and more demanding projects with multiple components.

You can read the state of a button using Arduino and a few lines of code. The actual state is shown in the Serial Monitor window as 0 or 1, 0 meaning the button is not pressed and 1 that the button is ...