Description Specification Reviews 3×4 12 Key Matrix Membrane Switch Keypad Keyboard Punch in your secret key into this numeric matrix keypad. This keypad has 12 buttons, arranged in a telephone-line 3×4 grid. It’s made of a thin, flexible membrane material with an adhesive backing (just remove the paper) so you can attach it to nearly anything. The keys are connected into a matrix, so you only need 7 microcontroller pins (3-columns and 4-rows) to scan through the pad. Check the tutorials tab for links to an Arduino library and example code. We include a 7-pin extra-long header strip so you can plug this into a breadboard with ease. How to Program? Arduino Code Video: SKU: 0187 Categories: Buttons, Switches & Pads, Connectivity, Touch Switch Tags: 12keys, 3x4, arduino, button, key, keyboard, keypad, matrix, membrane, switch, touch, ultra slim
