int speakerPin = 8; int length = 26; char notes[] = "eeeeeeegcdefffgfeeeeddedg"; int beats[] = { 1,1,2,1,1,2,1,1,1,1,4,1,1,1,1,1,1,1,1,1,1,1,1,1,2,2 }; int tempo = 250; void playTone(int tone, int duration) { for (long i = 0; i < duration * 1000L; i += tone * 2) { digitalWrite(speakerPin, HIGH); digitalWrite(3, HIGH); digitalWrite(4, HIGH); digitalWrite(5, HIGH); digitalWrite(6, HIGH); digitalWrite(7, HIGH); digitalWrite(9, HIGH); delayMicroseconds(tone); digitalWrite(speakerPin, LOW); digitalWrite(3, LOW); digitalWrite(4, LOW); digitalWrite(5, LOW); digitalWrite(6, LOW); digitalWrite(7, LOW); digitalWrite(9, LOW); delayMicroseconds(tone); } } void playNote(char note, int duration) { char names[] = { 'c', 'd', 'e', 'f', 's', 'g', 'a', 'v', 'b', 'C', 'D', 'E' }; int tones[] = { 1915, 1700, 1519, 1432, 1352, 1275, 1136, 1073, 1014, 956, 852, 758 }; // 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(speakerPin, OUTPUT); pinMode(3, OUTPUT); pinMode(4, OUTPUT); pinMode(5, OUTPUT); pinMode(6, OUTPUT); pinMode(7, OUTPUT); pinMode(9, OUTPUT); pinMode(10, INPUT_PULLUP); } void loop() { int sensorVal = digitalRead(10); Serial.println(sensorVal); if (sensorVal == LOW) { 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); } } else { digitalWrite(13, HIGH); } digitalWrite(3, HIGH); delay(200); digitalWrite(4, HIGH); delay(200); digitalWrite(5, HIGH); delay(200); digitalWrite(6, HIGH); delay(200); digitalWrite(7, HIGH); delay(200); digitalWrite(9, HIGH); delay(200); digitalWrite(9, LOW); delay(200); digitalWrite(7, LOW); delay(200); digitalWrite(6, LOW); delay(200); digitalWrite(5, LOW); delay(200); digitalWrite(4, LOW); delay(200); digitalWrite(3, LOW); delay(200); }