Matrix Keyboard 4x3 connection to Raspberry Pi Pico

TECHNICAL SUPPORT Sensors & Modules
1

Customer:

I have purchased a Matrix keyboard 3×4 (SKU: 108746) and I am wondering how to connect it to my Raspberry Pi Pico. I can see there are 9 holes below the keypad but I can’t find any information regarding which ones mean what. Am I supposed to place the holes on top of headers on a breadboard to connect it, similar to the 16×2 LCD display that comes with headers for its pins? The keypad doesn’t come with those headers.

Originally submitted via email support on 29 May 2025. Migrated to the forum for community visibility.

2

Soldered Support:

Here’s a tutorial that covers the Raspberry Pi Pico and explains the working principle: https://www.youtube.com/watch?v=7-PoXmxeCmQ

This keypad is a generic component. It doesn’t come with headers, so you’ll have to wire it yourself via some extra header pins inserted into the connector. You can also use M-M header pin cables to connect to a microcontroller.