Make ARDUINO PIANO and play Happy Birthday to you..

Hello all in this post i will show you how to make an arduino piano and play your first song in it.

Components needed

HOW TO SET UP THE HARDWARE :

the piano keys...

The piano keypad switches were connected using jumper wires.The main sketch defines which music note frequencies are associated with each piano key.  For this project, I used C4, D4, E4, F4, G4, A4,B4,C5, D5, E5, F5, G5, A5, & B5 with C4 being switch '0', D4 being switch '1'  and so on...  Change the frequency values, or add additional switches to fully customize your own project!

the SPEAKER..

To integrate the Speaker, simply connect one end to the Arduino pin 11, and the other side to ground . The "tone" function in the code will look for this pin in order to play the note called.

1. Arduino UNO -1
2. Male to Male jumper wires -10
3. 4x4 Keypad -1
4. 4ohm Speakers - 1
5. A PC or Laptop

Connect the circuit as shown in the diagram

HOW THE CODE WORKS

• The sketch begins by importing the "Keypad.h" and "pitches.h" libraries so we can reference various items from them later on in the code
• Next, the code is set up by defining the number of ROWS and COLUMNS determining which pins are inputs vs. outputs, and setting the SPEAKER pin as 11th pin of ARDUINO.
• Next we define the value of each keys in MATRIX form and assign which pin we need to connect the rows and columns(In this project i have used 3,2,8,0 pins as ROWS and 7,6,5,4 as columns).

the main loop...

• We are storing each key value to 'customkey' variable and also printing the value in the serial monitor of ARDUINO IDE.
• Next ,we are comparing each custom key and sending SPEAKER pin NOTE and DURATION to the tone function.

DOWNLOAD SOURCE CODE FILE HERE

Or copy the code below:

/* @file CustomKeypad.pde
|| @version 1.0
|| @author Alexander Brevig
|| @contact alexanderbrevig@gmail.com
||
|| @description
|| | Demonstrates changing the keypad size and key values.
|| #

*/


#include <Keypad.h>
#include "pitches.h"
#define GND 12
const byte ROWS = 4; //four rows
const byte COLS = 4; //four columns
const int SPEAKER=11;


//define the cymbols on the buttons of the keypads
char hexaKeys[ROWS][COLS] = {
  {'0','1','2','3'},
  {'4','5','6','7'},
  {'8','9','A','B'},
  {'C','D','E','F'}
};
byte rowPins[ROWS] = {3, 2, 8, 0}; //connect to the row pinouts of the keypad
byte colPins[COLS] = {7, 6, 5, 4}; //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);
  pinMode(GND,OUTPUT);
  digitalWrite(GND,LOW);
}
  
void loop(){
  char customKey = customKeypad.getKey();
  
  if (customKey=='0'){
    Serial.println(customKey);
    tone(SPEAKER,NOTE_C4,350);
  }
  if (customKey=='1'){
    Serial.println(customKey);
    tone(SPEAKER,NOTE_D4,350);
  }
  if (customKey=='2'){
    Serial.println(customKey);
    tone(SPEAKER,NOTE_E4,350);
  }
  if (customKey=='3'){
    Serial.println(customKey);
    tone(SPEAKER,NOTE_F4,350);
  }
  if (customKey=='4'){
    Serial.println(customKey);
    tone(SPEAKER,NOTE_G4,350);
  }
  if (customKey=='5'){
    Serial.println(customKey);
    tone(SPEAKER,NOTE_A4,350);
  }
  if (customKey=='6'){
    Serial.println(customKey);
    tone(SPEAKER,NOTE_B4,350);
  }
  if (customKey=='7'){
    Serial.println(customKey);
    tone(SPEAKER,NOTE_C5,350);
  }
  if (customKey=='8'){
    Serial.println(customKey);
    tone(SPEAKER,NOTE_D5,350);
  }
  if (customKey=='9'){
    Serial.println(customKey);
    tone(SPEAKER,NOTE_E5,350);
  }
  if (customKey=='A'){
    Serial.println(customKey);
    tone(SPEAKER,NOTE_F5,350);
  }
  if (customKey=='B'){
    Serial.println(customKey);
    tone(SPEAKER,NOTE_G5,350);
  }
  if (customKey=='C'){
    Serial.println(customKey);
    tone(SPEAKER,NOTE_A5,350);
  }
  if (customKey=='D'){
    Serial.println(customKey);
    tone(SPEAKER,NOTE_B5,350);
  }
  if (customKey=='E'){
    Serial.println(customKey);
    tone(SPEAKER,NOTE_C6,350);
  }
  if (customKey=='F  '){
    Serial.println(customKey);
    tone(SPEAKER,NOTE_D6,350);
  }
}

NOTE: SPEAKER should be only connected to any PWM pins of ARDUINO else the setup will not works

HAPPY BIRTHDAY NOTES ON KEYPAD:

4 4 5   4 B 6        4 4 5   4 7 B

4 4 C   8 B 6 5

9 9 9  B 7 B

Enjoy your play.....