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 3x4 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: <100Ω * 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) https://elecena.pl/product/24023392/4x4-matrix-keypad 2023-08-10 https://elecena.pl/product/24023392/4x4-matrix-keypad 2023-12-27 https://elecena.pl/product/24023392/4x4-matrix-keypad 2024-03-20 https://elecena.pl/product/24023392/4x4-matrix-keypad 2024-09-19 https://elecena.pl/product/24023392/4x4-matrix-keypad 2024-11-29 https://elecena.pl/product/24023392/4x4-matrix-keypad 2024-11-30 https://elecena.pl/product/24023392/4x4-matrix-keypad 2025-11-28 https://elecena.pl/product/24023392/4x4-matrix-keypad 2025-11-29