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STARTER KIT - KEYBOARD INSTRUMENT

Arduino Starter Kit example
Project 7 - Keyboard

This sketch is written to accompany Project 7 in the
Arduino Starter Kit

Parts required:
two 10 kilohm resistors
1 Megohm resistor
220 ohm resistor
4 pushbuttons
piezo

Created 13 September 2012
by Scott Fitzgerald

This example code is part of the public domain

// create an array of notes
// the numbers below correspond to
// the frequencies of middle C, D, E, and F
int notes[] = {262, 294, 330, 349};

void setup() {
  //start serial communication
  Serial.begin(9600);
}

void loop() {
  // create a local variable to hold the input on pin A0
  int keyVal = analogRead(A0);
  // send the value from A0 to the Serial Monitor
  Serial.println(keyVal);

  // play the note corresponding to each value on A0
  if (keyVal == 1023) {
    // play the first frequency in the array on pin 8
    tone(8, notes[0]);
  }
  else if (keyVal >= 990 && keyVal <= 1010) {
    // play the second frequency in the array on pin 8
    tone(8, notes[1]);
  }
  else if (keyVal >= 505 && keyVal <= 515) {
    // play the third frequency in the array on pin 8
    tone(8, notes[2]);
  }
  else if (keyVal >= 5 && keyVal <= 10) {
    // play the fourth frequency in the array on pin 8
    tone(8, notes[3]);
  }
  else {
    // if the value is out of range, play no tone
    noTone(8);
  }
}