Project - 10 :- KeyPad By Using Arduino

        PROJECT – KeyPad 

In this tutorial you will learn how to use a Keypad with Arduino and push some buttons to turn on LED.            

               STEP – 1: Components

Components Required:-

1.    Arduino Uno.

2.    Breadboard.       

3.    Keypad

4.    Wires.                              

STEP – 2: Circuit

The connections are pretty easy, see the image above with the breadboard circuit  schematic.

     STEP – 3: Add Library

Before you can use the KeyPad on the Arduino, you’ll need to install the library. It’s easy to install, open up the Arduino IDE. Then go to Sketch>Include Library>Manage Libraries>search Keypad>install library.

   

    STEP – 4: Upload Code 

/*

 * Original sourse: https://playground.arduino.cc/Code/Keypad

 * This is the Arduino code for 4x4 keypad.

 * watch the video for details and demo http://youtu.be/qIDzzG2LUtg

 *  *

 * Written by Ahmad Nejrabi for Robojax Video channel www.Robojax.com

 * Date: Dec 18, 2017, in Ajax, Ontario, Canada

 * Permission granted to share this code given that this

 * note is kept with the code.

 * Disclaimer: this code is "AS IS" and for educational purpose only.

 * this code has been downloaded from http://robojax.com/learn/arduino/

 *

 */

/* @file HelloKeypad.pde

|| @version 1.0

|| @author Alexander Brevig

|| @contact alexanderbrevig@gmail.com

||

|| @description

|| | Demonstrates the simplest use of the matrix Keypad library.

|| #

*/

#include <Keypad.h>

const byte ROWS = 4; //four rows

const byte COLS = 4; //three columns

char keys[ROWS][COLS] = {

  {'1','2','3','A'},

  {'4','5','6','B'},

  {'7','8','9','C'},

  {'*','0','#','D'}

};

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);

}

void loop(){

  char key = keypad.getKey();

    // just print the pressed key

   if (key){

    Serial.println(key);

  }

}

       /* Copy above Code and Paste in Your Arduino Sketch */

Step 5: Well Done!

You have successfully completed one more Arduino Project and you learned how to use a KeyPad with Arduino and also learned how to Turn On LED by pushing button on KeyPad.

THANKYOU!

Next Project - 11 :- 7_Segment Display By Using Arduino.
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