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/* This code is derived from:
* http://www.arduino.cc/en/Tutorial/Melody
* This plays the chest noise from the Legend of Zelda on a piezo buzzer connected to pin 9 and ground. It has been tuned to a buzzer I had on hand, but you may want to adjust the values, testing against a tuner.
*/
int speakerPin = 0;
const int switchPin = 1;
char notes[] = "gabygabyxzCDxzCDabywabywzCDEzCDEbywFCDEqywFGDEqi azbC"; // a space represents a rest
int length = sizeof(notes); // the number of notes
int beats[] = { 1,1,1,1, 1,1,1,1, 1,1,1,1, 1,1,1,1, 1,1,1,1, 1,1,1,1, 1,1,1,1, 1,1,1,1, 1,1,1,1, 1,1,1,1, 1,1,1,1, 1,1,1,1, 1,1,1,1, 1,1,1,1, 2,3,3,16,};
int tempo = 75;
void playTone(int tone, int duration) {
for (long i = 0; i < duration * 1000L; i += tone * 2) {
digitalWrite(speakerPin, HIGH);
delayMicroseconds(tone);
digitalWrite(speakerPin, LOW);
delayMicroseconds(tone);
}
}
void playNote(char note, int duration) {
char names[] = { 'c', 'd', 'e', 'f', 'g', 'x', 'a', 'z', 'b', 'C', 'y', 'D', 'w', 'E', 'F', 'q', 'G', 'i' };
// c=C4, C = C5. These values have been tuned.
int tones[] = { 1898, 1690, 1500, 1420, 1265, 1194, 1126, 1063, 1001, 947, 893, 843, 795, 749, 710, 668, 630, 594 };
// play the tone corresponding to the note name
for (int i = 0; i < 18; i++) {
if (names[i] == note) {
playTone(tones[i], duration);
}
}
}
void setup() {
pinMode(switchPin, INPUT);
digitalWrite(switchPin, HIGH);
}
void loop() {
pinMode(speakerPin, OUTPUT);
if (digitalRead(switchPin) == 1) {
for (int i = 0; i < length; i++) {
if (notes[i] == ' ') {
delay(beats[i] * tempo); // rest
} else {
playNote(notes[i], beats[i] * tempo);
}
// pause between notes
delay(tempo / 2);
}
}
delay(100);
}