Make simple math with arduino UNO

What if an old IBM keyboard was converted with Arduino so it continuously types like Jack Nicholson in The Shining movie?

Halloween is near, so grab your Arduino, make an EMF detector and play with it.

Hand gesture control using Arduino Leonardo and IR sensors.

ArcheAge gamepad for instant combos.

5 Minutes Commodore 64 Joystick USB adapter.

Arduino Mkr1000 + Uno + Leonardo + Java = Christmas shooting game.