Membrane 4X4 Matrix Keypad


C-4, R-2 , I-2


Product ID: 2202 SKU: elec-2202 Categories: , Tags: ,

Punch in your secret key into this numeric matrix keypad. This keypad has 12 buttons, arranged in a telephone-line 4×4 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 8 microcontroller pins (4-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 8-pin extra-long header strip so you can plug this into a breadboard with ease.


    • Pad Size: 70 * 77 * 0.8mm
    • Cable Length: 85mm(include connector)
    • Connector: 8 pins female header, 2.54mm Pitch
    • Max Circuit Rating: 35VDC, 100mA
    • Insulation Spe: 100M Ohm, 100V
    • Dielectric Withstand: 250VRms (60Hz, 1min)
    • Contact Bounce: <=5ms
    • Life Expectancy: 1 million closures
    • Operation Temperature: -20 to +40 °C

    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:


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