View source for Common Project - Xmas 2013 Music

= Christmas tunes on an Arduino =
The circuit is simple, an 8 ohm speaker is connected to Arduino pin 8, with the cathode connected to the ground.

 /* Modified Tone Sketch from Tom Igoe - Taken from the Arduino SDK examples */
 /* Modded by NJA Hackers to play Jingle Bells*/
 #include "pitches.h"
 
 // notes in the melody:
 int melody[] = {
   NOTE_E5,NOTE_E5,NOTE_E5,NOTE_E5,NOTE_E5,NOTE_E5,NOTE_E5,NOTE_G5,NOTE_C5,NOTE_D5,NOTE_E5,
   NOTE_F5,NOTE_F5,NOTE_F5,NOTE_F5,NOTE_F5,NOTE_E5,NOTE_E5,NOTE_E5,NOTE_E5,NOTE_D5,NOTE_D5,
   NOTE_E5,NOTE_D5,NOTE_G5,
   NOTE_E5,NOTE_E5,NOTE_E5,NOTE_E5,NOTE_E5,NOTE_E5,NOTE_E5,NOTE_G5,NOTE_C5,NOTE_D5,NOTE_E5,
   NOTE_F5,NOTE_F5,NOTE_F5,NOTE_F5,NOTE_F5,NOTE_E5,NOTE_E5,NOTE_E5,NOTE_G5,NOTE_G5,NOTE_F5,
   NOTE_D5,NOTE_C5,
 };
 
 // note durations: 4 = quarter note, 8 = eighth note, etc.:
 int noteDurations[] = {
   2,2,4,2,2,4,2,2,2,2,8,
   2,2,2,2,2,2,2,2,2,2,2,
  2,4,4,
  2,2,4,2,2,4,2,2,2,2,8,
  2,2,2,2,2,2,2,2,2,2,2,
  2,8,
 };
 
 void setup() {  
   int numberOfNotes = sizeof(melody)/sizeof(int);
   // iterate over the notes of the melody:
   for (int thisNote = 0; thisNote < numberOfNotes; thisNote++) { 
 
     // to calculate the note duration, take one second 
     // divided by the note type.
     //e.g. quarter note = 1000 / 4, eighth note = 1000/8, etc.
     int noteDuration = 200*noteDurations[thisNote];
     tone(8, melody[thisNote],noteDuration); 
 
     // to distinguish the notes, set a minimum time between them.
     // the note's duration + 30% seems to work well:
     int pauseBetweenNotes = noteDuration * 0.8;
     delay(pauseBetweenNotes);
     // stop the tone playing:
     noTone(8);
   }
 }
 
 void loop() {
   // no need to repeat the melody.
 }