Tags: 4x4, Matrix, 16, Button, Keypad, Module

Keypad 4x4 Matrix 16 Button Module

  • 19.00 AED

    25.00 AED

    • Ex Tax:19.00 AED
    • Brands techmaze
    • Product Code: Digital
    • Availability: In Stock
    16 buttons matrix keypad in 4x4It is a 16 key button keypad in 4x4 arrangement. It has general 0.1 inch male jumpers, you can easily use it in your microcontroller projects like Arduino with breadboards.Arduino Code for Keypad 4x4 Matrix 16 Button Module:#include <Keypad.h>int s..
    16 buttons matrix keypad in 4x4
    It is a 16 key button keypad in 4x4 arrangement.
     It has general 0.1 inch male jumpers, you can easily use it in your microcontroller projects like Arduino with breadboards.



    Arduino Code for Keypad 4x4 Matrix 16 Button Module:

    #include <Keypad.h>


    int speakerPin = 12; // speaker connected to digital pin 12


    const byte ROWS = 4; //four rows

    const byte COLS = 4; //four columns


    char keys[ROWS][COLS] = {

    {‘a’,’b’,’c’,’d’},

    {‘e’,’f’,’g’,’h’},

    {‘i’,’j’,’k’,’l’},

    {‘m’,’n’,’o’,’p’}

    };

    byte rowPins[ROWS] = {2, 3, 4, 5}; //connect to the row pinouts of the keypad

    byte colPins[COLS] = {6, 7, 8, 9}; //connect to the column pinouts of the keypad


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


    void setup(){


    Serial.begin (9600);


    pinMode(speakerPin, OUTPUT); // sets the speakerPin to be an output


    }


    void loop(){

    char key = keypad.getKey();


    if (key != NO_KEY){

    Serial.println(key);


    if (key==’a’){ beep(speakerPin,2093,100);}

    if (key==’b’){ beep(speakerPin,2349,100);}

    if (key==’c’){ beep(speakerPin,2637,100);}

    if (key==’d’){ beep(speakerPin,2793,100);}

    if (key==’e’){ beep(speakerPin,3136,100);}

    if (key==’f’){ beep(speakerPin,3520,100);}

    if (key==’g’){ beep(speakerPin,3951,100);}

    if (key==’h’){ beep(speakerPin,4186,100);}

    if (key==’i’){ beep(speakerPin,2093,100);}

    if (key==’j’){ beep(speakerPin,2349,100);}

    if (key==’k’){ beep(speakerPin,2637,100);}

    if (key==’l’){ beep(speakerPin,2793,100);}

    if (key==’m’){ beep(speakerPin,3136,100);}

    if (key==’n’){ beep(speakerPin,3520,100);}

    if (key==’o’){ beep(speakerPin,3951,100);}

    if (key==’p’){ beep(speakerPin,4186,100);}

    }

    }


    void beep (unsigned char speakerPin, int frequencyInHertz, long timeInMilliseconds){ // the sound producing function

    int x;

    long delayAmount = (long)(1000000/frequencyInHertz);

    long loopTime = (long)((timeInMilliseconds*1000)/(delayAmount*2));

    for (x=0;x<loopTime;x++)

    {

    digitalWrite(speakerPin,HIGH);

    delayMicroseconds(delayAmount);

    digitalWrite(speakerPin,LOW);

    delayMicroseconds(delayAmount);

    }

    }


    Tags: button;keypad;input