4x3 Matrix 12 Key Membrane Switch Keypad [S228]

4x3 Matrix 12 Key Membrane Switch Keypad [S228]

https://www.youtube.com/watch?v=15Asj5XZBlg

* Specs

Pad Size: 69.2 x 76.9 x 0.8mm

Cable Length: 3-1/3" or 86mm (include connector)

Connector: Dupont 7 pins, 0.1" (2.54mm) Pitch

Mount Style: Self-Adherence

Max. Circuit Rating: 35VDC, 100mA

Insulation Spec.: 100M Ohm, 100V

Dielectric Withstand: 250VRms (60Hz, 1min)

Contact Bounce: <=5ms

Life Expectancy: 1 million closures

Operation Temperature: -20 to +40 °C

 

Package:

1PCS X4 x 3 Matrix Array 12 Key Membrane Switch Keypad Keyboard

 

* Contents

- LIbrary : http://playground.arduino.cc/uploads/Code/keypad.zip

- Connect

7 ----- D9

6 ----- D8

5 ----- D7

4 ----- D6

3 ----- D5

2 ----- D4

1 ----- D3

- Key Code

#include <Keypad.h>

const byte ROWS = 4; //four rows

const byte COLS = 3; //four columns

//define the cymbols on the buttons of the keypads

char hexaKeys[ROWS][COLS] = {

 {'1','2','3'},

 {'4','5','6'},

 {'7','8','9'},

 {'*','0','#'}

};

byte rowPins[ROWS] = {9, 8, 7, 6}; //connect to the row pinouts of the keypad

byte colPins[COLS] = {5, 4, 3}; //connect to the column pinouts of the keypad

//initialize an instance of class NewKeypad

Keypad customKeypad = Keypad( makeKeymap(hexaKeys), rowPins, colPins, ROWS, COLS);

void setup(){

 Serial.begin(9600);

}

 

void loop(){

 char customKey = customKeypad.getKey();

 

 if (customKey){

 Serial.println(customKey);

 }

}