Arduino Based Piano Project

This video will illustrate to you how to make a simple piano by using IR Modules.

Based on the frequency of sa, re, ga, ma, pa, dha, ni and sa the tone of the buzzer will change.

Video Link

Components Required:

1> I.R. Modules

2> Arduino Uno

3> Jumper Wires

4>Small Breadboard

Circuit Diagram

Arduino Code:

int button_C = 2;
int button_D = 3;
int button_E = 4;
int button_F = 5;
int button_G = 6;
int button_A = 7;
int button_B = 8;
int button_Cup = 9;

int speaker = 10;

int buttonstate_C = 0;
int buttonstate_D = 0;
int buttonstate_E = 0;
int buttonstate_F = 0;
int buttonstate_G = 0;
int buttonstate_A = 0;
int buttonstate_B = 0;
int buttonstate_Cup = 0;

//NOTES         'c'  , 'd',  'e',  'f',  'g', 'a',  'b',  'C'
int tones[] = { 240, 254, 285, 320, 359, 280, 427, 956 }; //freq
int Cur_tone = 0;

void setup()
{
  pinMode(button_C, OUTPUT);
  pinMode(button_D, INPUT);
  pinMode(button_E, INPUT);
  pinMode(button_F, INPUT);
  pinMode(button_G, INPUT);
  pinMode(button_A, INPUT);
  pinMode(button_B, INPUT);
  pinMode(button_Cup, INPUT);

  pinMode(speaker, OUTPUT);
Serial.begin(9600);
}

void loop()
{
  buttonstate_C = digitalRead(button_C);
  buttonstate_D = digitalRead(button_D);
  buttonstate_E = digitalRead(button_E);
  buttonstate_F = digitalRead(button_F);
  buttonstate_G = digitalRead(button_G);
  buttonstate_A = digitalRead(button_A);
  buttonstate_B = digitalRead(button_B);
  buttonstate_Cup = digitalRead(button_Cup);
  Serial.print(buttonstate_C);
  Serial.print("||");
  Serial.print(buttonstate_D);
  Serial.print("||");
  Serial.print(buttonstate_E);
  Serial.print("||");
  Serial.print(buttonstate_F);
  Serial.print("||");
  Serial.print(buttonstate_G);
  Serial.print("||");
  Serial.print(buttonstate_A);
  Serial.print("||");
  Serial.print(buttonstate_B);
  Serial.print("||");
  Serial.println(buttonstate_Cup);

  if((buttonstate_C == LOW) || (buttonstate_E == LOW) ||
    (buttonstate_G == LOW) || (buttonstate_D == LOW) ||
    (buttonstate_F == LOW) || (buttonstate_A == LOW) ||
    (buttonstate_B == LOW) || (buttonstate_Cup == LOW) )
  {
    if (buttonstate_C == LOW)
    {
      Cur_tone = tones[0];
     
    }
    if (buttonstate_E == LOW)
    {
      Cur_tone = tones[1];
    }
    if (buttonstate_G == LOW)
    {
      Cur_tone = tones[2];
    }
    if (buttonstate_D == LOW)
    {
      Cur_tone = tones[3];
    }
    if (buttonstate_F == LOW)
    {
      Cur_tone = tones[4];
    }
    if (buttonstate_A == LOW)
    {
      Cur_tone = tones[5];
    }
    if (buttonstate_B == LOW)
    {
      Cur_tone = tones[6];
    }
    if (buttonstate_Cup == LOW)
    {
      Cur_tone = tones[7];
    }
    digitalWrite(speaker, LOW);
    tone(10, Cur_tone,100 );
        digitalWrite(speaker, HIGH);
    tone(10, Cur_tone,100 );

//    digitalWrite(speaker, HIGH);
//    delayMicroseconds(Cur_tone);
  }
  else //in case no button is pressed, close the piezo
  {
    digitalWrite(speaker, LOW);
  }

}