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Membrane 3x4 Matrix Keypad + extras - 3x4

€4.22 *

Prices incl. VAT plus shipping costs

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Delivery time appr. 1-3 workdays

  • Adafruit
  • EXP-R15-1229
  • 419
  • 2
  • CN
  • 84716060
  • 0.008
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Punch in your secret key into this numeric matrix keypad. This keypad has 12 buttons, arranged... more

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.

Technical Details:

  • 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
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