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- int Piezo = 5;
- int length = 31;
- char notes[] = "dggagfeeeaabagfddbbCbageddeafg";
- int beats[] = {2,2,1,1,1,1,2,2,2,2,1,1,1,1,2,2,2,2,1,1,1,1,2,2,1,1,2,2,2,4};
- int tempo = 190;
- void playTone(int tone, int duration) {
- for (long i = 0; i < duration * 1000L; i += tone * 2) {
- digitalWrite(Piezo, HIGH);
- delayMicroseconds(tone);
- digitalWrite(Piezo, LOW);
- delayMicroseconds(tone);
- }
- }
- void playNote(char note, int duration) {
- char names[] = { 'c', 'd', 'e', 'f', 'g', 'a', 'b', 'C', 'D', 'E', 'F', 'G', 'A', 'B' };
- int tones[] = { 1915, 1700, 1519, 1432, 1275, 1136, 1014, 956, 851, 758, 716, 636, 568, 506 };
- // these are the "sharp" versions of each note e.g. the first value is for "c#"
- char names_sharp[] = { 'c', 'd', 'f', 'g', 'a', 'C', 'D', 'F', 'G', 'A' };
- int tones_sharp[] = { 1804, 1607, 1351, 1204, 1073, 902, 804, 676, 602, 536 };
- // play the tone corresponding to the note name
- for (int i = 0; i < 8; i++) {
- if (names[i] == note) {
- playTone(tones[i], duration);
- }
- }
- }
- void setup() {
- pinMode(Piezo, OUTPUT);
- }
- void loop() {
- 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 / 15);
- }
- }
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