Common Project - Xmas 2013 Music: Difference between revisions

Common Project - Xmas 2013 Music (view source)

Revision as of 21:56, 25 November 2013

1,701 bytes added , 25 November 2013

→‎Christmas tunes on an Arduino

Paulmaidment

73

edits

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 = 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.
+    /*
+   Melody
+  Plays a melody
+  circuit:
+  * 8-ohm speaker on digital pin 8
+  created 21 Jan 2010
+  modified 30 Aug 2011
+  by Tom Igoe
+ This example code is in the public domain.
+  http://arduino.cc/en/Tutorial/Tone
+  */
+  #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[] = {
+,2,4,2,2,4,2,2,2,2,8,
+,2,2,2,2,2,2,2,2,2,2,
+,4,4,
+,2,4,2,2,4,2,2,2,2,8,
+,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.
+ }