So now you can see how the button presses can be translated into electrical data for use with a microcontroller. ... Keypad pin 1 to Arduino digital 3 //C2; Keypad pin 2 to Arduino digital 5 //R1; ...

The OONTZ uses a 3D printed case, a 16 button keypad, an Arduino Leonardo, a monochrome driver, and a few potentiometers. It's actually a pretty simple thing to build yourself provided you can the ...