Membrane 4X4 Matrix Keypad ,


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:

#include "Arduino.h"
#include "Keypad.h"

const byte ROWS = 4; //four rows
const byte COLS = 4; //three columns
char keys[ROWS][COLS] = {
byte rowPins[ROWS] = {9, 8, 7, 6}; //connect to the row pinouts of the keypad
byte colPins[COLS] = {5, 4, 3, 2}; //connect to the column pinouts of the keypad

Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );


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