Keypad, 3x4 Matrix, 12 Button

(2 reviews) Write a Review
  • Keypad, 3x4 Matrix, 12 Button main
  • Keypad, 3x4 Matrix, 12 Button dimension
  • Keypad, 3x4 Matrix, 12 Button 1
  • Keypad, 3x4 Matrix, 12 Button 2
  • Keypad, 3x4 Matrix, 12 Button 3


Keypad, 3x4 Matrix, 12 Button

This is a basic 12 button keypad that has been designed for easy user input and functionality. The buttons are set up in a matrix format. This allows a microcontroller to 'scan' the 7 output pins to see which of the 12 buttons is being pressed.

Each of the keypad's 12 buttons has been labeled 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, *, and # and has been formatted to into the same layout as a telephone keypad with each keypress resistance ranging between 10 and 150 Ohms. We've also made sure to create an updated pin-out for this keypad since it has been changed from the previous version. The pin-out can be found in the Documents tab above.

Keypad Schematic:

Keypad, 3×4 Matrix, 12 Button Schematic

View AllClose

Additional Information

Part Number:
View AllClose

2 Reviews

  • 5
    Title of review 703

    Posted by Andy Dillo on 26th Feb 2014

    Well made keypad at a competitive priceSimple to interface to my current Arduino project.

  • 5
    Title of review 702

    Posted by Terry on 13th Feb 2014

    I bought some of these keypads from ProtoPic as they were cheaper than anywhere else (including eBay...). I was pleased to discover that I got a really good quality product that is built solidly and performs excellently. Thanks :)

View AllClose