Membrane 3x4 Matrix Keypad

This 12-button keypad provides a useful human interface component for microcontroller projects. It's made of a thin, flexible membrane material with an adhesive backing 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 an 7-pin extra-long header strip so you can plug this into a breadboard with ease.

Features:

• Ultra-thin design & adhesive backing provides easy integration to any project
• Easy communication with any microcontroller
• Maximum Rating: 24 VDC, 30 mA
• Interface: 7-pin access to 3x4 matrix

Documents:

• Arduino Keypad Library
• Arduino Instructable

Dimensions:

• Keypad dimensions: 70mm x 77mm x 1mm
• Length of cable + connector: 85mm
• Weight: 7.5 grams