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Membrane Matrix Keypad  3x4
Membrane Matrix Keypad  3x4Membrane Matrix Keypad  3x4Membrane Matrix Keypad  3x4
Membrane Matrix Keypad  3x4Membrane Matrix Keypad  3x4

Membrane Matrix Keypad 3x4

  (1 Review)
Our Price:  £3.49 

Available Now:  

34 in stock, immediate despatch

Part Number:  419
Brand:  Proto-PIC

Keypad to Serial ConverterKeypad to Serial Converter

Punch in your secret key into this numeric matrix keypad. This keypad has 12 buttons, arranged in a telephone-line 3x4 grid. It's made of a thin, flexible membrane material with an adhesive backing (just remove the paper) so you can attach it to nearly anything. The keys are connected into a matrix, so you only need 7 microcontroller pins (3-columns and 4-rows) to scan through the pad. Check the tutorials tab for links to an Arduino library and example code.

We include a 7-pin extra-long header strip so you can plug this into a breadboard with ease.

We sell this handy kit to convert the signal from the keypad to a simple serial signal reducing the number of required pins to 3


  • Weight: 7.5 grams
  • Keypad dimensions: 70mm x 77mm x 1mm (2.75" x 3" x 0.035")
  • Length of cable + connector: 85mm
  • 7-pin 0.1" pitch connector

There is a very nice Matrix Keypad Arduino library that works great with this item. The only thing we suggest is to change the initialization code in the examples to this:

This will swap the * and # keys and also let you connect to the Arduino to match this image

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Customer Reviews
Average Rating (1 Review):  
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Simple, cheap and fast
Saturday, 14 January 2017  |  Samuel

Not many places sell keypads at this type of price and i was wary of how good it would be. But it came next day and has been working perfectly ever since

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