4x4 Matrix Keyboard, hard keys, 43 x 39 mm for Micro Controller.
This is a simple version with tactile push buttons on a PCB.
An operating voltage of 35V and a maximum current of 100mA per switch element must not be exceeded.
A library, supporting any kind of matrix keypads, is available for example within the Arduino IDE.
Greg in Kanata –
She used to push my buttons, but now I can do it myself.
Lucky me?
Robert Leedham (verified owner) –
Nice little board, except the header is installed with the pins on the same side as the buttons. Makes it unusable on a breadboard. Preference would be to not have the header installed at all.