Piano

 

// C++ code

//

/*

  Keyboard

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  Plays a pitch that changes based on a changing

  input circuit:

  * 3 pushbuttons from +5V to analog in 0 through

  3

  * 3 10K resistors from analog in 0 through 3 to

  ground

  * 8-ohm speaker on digital pin 8

*/

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/*

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*/

int pos = 0;

void setup()

{

  pinMode(A0, INPUT);

  pinMode(8, OUTPUT);

  pinMode(A1, INPUT);

  pinMode(A2, INPUT);

}

void loop()

{

  // if button press on A0 is detected

  if (digitalRead(A0) == HIGH) {

    tone(8, 440, 100); // play tone 57 (A4 = 440 Hz)

  }

  // if button press on A1 is detected

  if (digitalRead(A1) == HIGH) {

    tone(8, 494, 100); // play tone 59 (B4 = 494 Hz)

  }

  // if button press on A0 is detected

  if (digitalRead(A2) == HIGH) {//low

    tone(8, 523, 100); // play tone 60 (C5 = 523 Hz)

  }

  delay(10); // Delay a little bit to improve simulation performance

}