Add data entry, passwords and more to your projects with this numeric matrix keypad.

The keypad has sixteen buttons in an old-school telephone-style grid. Each button is connected to a matrix so you can use 8 GPIO on your microcontroller of choice to scan through the pad for entry.

Either solder thin wires directly to the pads, or fit some 2.54mm/01″ headers and solder them downwards for using with a breadboard.

Adafruit have a great tutorial for using this style of matrix over on their website

We also sell a 3×4 version of this matrix keypad

Pinout

From the left there are four row pins followed by four column pins.

Specifications

• Force: 160-180g
• Contact Resistance: <100
• Dimensions (approx): 69.0mm x 66mm x 10mm
• Weight: ~21g

Revision History

• As of 20/03/2024, we no longer provide a pin header strip with this keypad (due to a supplier change)