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:#include <Keypad.h>int speakerPin = 12; // speaker connected to digi..
    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:

    #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