Happy Birthday Tone Using Arduino Uno

1int speakerPin = 7; // Buzzer pin
2int length = 28; // the number of   notes
3char notes[] = "GGAGcB GGAGdc GGxecBA yyecdc";
4int beats[] = {2,2,8,8,8,16,1,2,2,8,8,8,16,1,2,2,8,8,8,8,16,1,2,2,8,8,8,16};
5int   tempo = 200;// time delay between notes 
6
7void playTone(int tone, int duration)   {
8for (long i = 0; i < duration * 1000L; i += tone * 2) {
9   digitalWrite(speakerPin,   HIGH);
10   delayMicroseconds(tone);
11   digitalWrite(speakerPin, LOW);
12   delayMicroseconds(tone);
13}
14}
15
16void   playNote(char note, int duration) {
17char names[] = {'C', 'D', 'E', 'F', 'G',   'A', 'B',           
18
19                 'c', 'd', 'e', 'f', 'g', 'a', 'b',
20
21                  'x', 'y' };
22
23int tones[] = { 1915, 1700, 1519, 1432, 1275,   1136, 1014,
24
25                 956,  834,  765,  593,  468,  346,  224,
26
27                  655 , 715 };
28
29int SPEE = 5;
30
31// play the tone corresponding   to the note name
32
33for (int i = 0; i < 17; i++) {
34
35   if (names[i] ==   note) {
36    int newduration = duration/SPEE;
37     playTone(tones[i], newduration);
38    }
39}
40}
41
42void setup() {
43pinMode(speakerPin, OUTPUT);
44}
45
46void   loop() {
47for (int i = 0; i < length; i++) {
48   if (notes[i] == ' ') {
49      delay(beats[i] * tempo); // delay between notes
50   } else {
51     playNote(notes[i],   beats[i] * tempo);
52   }
53   // time delay between notes
54   delay(tempo);
55}
56}

1int speakerPin = 7; // Buzzer pin
2int length = 28; // the number of  notes
3char notes[] = "GGAGcB GGAGdc GGxecBA yyecdc";
4int beats[] = {2,2,8,8,8,16,1,2,2,8,8,8,16,1,2,2,8,8,8,8,16,1,2,2,8,8,8,16};
5int  tempo = 200;// time delay between notes 
6
7void playTone(int tone, int duration)  {
8for (long i = 0; i < duration * 1000L; i += tone * 2) {
9   digitalWrite(speakerPin,  HIGH);
10   delayMicroseconds(tone);
11   digitalWrite(speakerPin, LOW);
12   delayMicroseconds(tone);
13}
14}
15
16void  playNote(char note, int duration) {
17char names[] = {'C', 'D', 'E', 'F', 'G',  'A', 'B',           
18
19                 'c', 'd', 'e', 'f', 'g', 'a', 'b',
20
21                 'x', 'y' };
22
23int tones[] = { 1915, 1700, 1519, 1432, 1275,  1136, 1014,
24
25                 956,  834,  765,  593,  468,  346,  224,
26
27                 655 , 715 };
28
29int SPEE = 5;
30
31// play the tone corresponding  to the note name
32
33for (int i = 0; i < 17; i++) {
34
35   if (names[i] ==  note) {
36    int newduration = duration/SPEE;
37     playTone(tones[i], newduration);
38   }
39}
40}
41
42void setup() {
43pinMode(speakerPin, OUTPUT);
44}
45
46void  loop() {
47for (int i = 0; i < length; i++) {
48   if (notes[i] == ' ') {
49     delay(beats[i] * tempo); // delay between notes
50   } else {
51     playNote(notes[i],  beats[i] * tempo);
52   }
53   // time delay between notes
54   delay(tempo);
55}
56}