Membrane 3x4 Matrix Keypad + Extras

Punch in your secret key into this numeric matrix keypad featuring 12 buttons arranged in a telephone-style 3x4 grid. Made of a thin, flexible membrane material with adhesive backing for easy attachment to nearly any surface. The keypad uses a matrix layout requiring only 7 microcontroller pins (3 columns and 4 rows) for scanning. Includes a 7-pin extra-long header strip for convenient breadboard connection.

• 12-key telephone style 3x4 matrix layout
• Thin, flexible membrane keypad with adhesive backing
• Matrix wiring needs only 7 microcontroller pins
• Includes 7-pin extra-long header strip for breadboard use
• Keypad dimensions: 70mm x 77mm x 1mm (2.75" x 3" x 0.035")
• Cable and connector length: 85mm
• Weight: 7.5 grams

Check the tutorials section for wiring diagrams, Arduino libraries, and example code to get started quickly: Adafruit Matrix Keypad Guide.