Arduino matrix keypad circuit connections and program inTelugu

 Arduino matrix keypad tutorial:

In this article, we know about the Arduino matrix keypad . this matrix keypad available on different type They are 3x3  and 4x4  types . now we learn about  4x4  matrix keypad . this 4x4  matrix keypad has a total of 16 keys . And it has  8 pins ,these  8 pins are divided into 4row pins and 4 column pins .know more details about this matrix keypad watch below video. 

Components :

• Arduino                          BuyNow

• matrix keypad                BuyNow

• breadboard and wires    BuyNow

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Arduino matrix keypad program :

// Include the Keypad library

#include <Keypad.h>

// Constants for row and column sizes

const byte ROWS = 4;

const byte COLS = 4;

// Array to represent keys on keypad

char mekeypad[ROWS][COLS] = {

  {'1', '2', '3', 'A'},

  {'4', '5', '6', 'B'},

  {'7', '8', '9', 'C'},

  {'*', '0', '#', 'D'}

};

// Connections to Arduino

byte rowPins[ROWS] = {9, 8, 7, 6};

byte colPins[COLS] = {5, 4, 3, 2};

// Create keypad object

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

void setup() {

  // Setup serial monitor

  Serial.begin(9600);

}

void loop() {

  // Get key value if pressed

  char customKey = customKeypad.getKey();

  if (customKey) {

    // Print key value to serial monitor

    Serial.println(customKey);

  }

}

if you have any doubts regarding to this project, contact me on Instagram or comment on YouTube video. I will help my best.