Playing The Melody

Play Twinkle-twinkle Little Star with #piezo #buzzer controlled by #arduino. Another simple example of Arduino project. On the way to learn Arduino. #microcontrollers #electronics #sound #c

Video kiriman Hani (read:honey) (@hanifadinna) pada Agu 21, 2015 pada 7:36 PDT

This weekend I added up some instrument called piezo buzzer. We can play the tone, and as the beginner I started with the example from here . The copied code is here

	int speakerPin = 9;
	int length = 15; // the number of notes
	char notes[] = "ccggaagffeeddc "; // a space represents a rest
	int beats[] = { 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 4 };
	int tempo = 300;
	void playTone(int tone, int duration) {
	for (long i = 0; i < duration * 1000L; i += tone * 2) {
	digitalWrite(speakerPin, HIGH);
	delayMicroseconds(tone);
	digitalWrite(speakerPin, LOW);
	delayMicroseconds(tone);
	}
	}
	void playNote(char note, int duration) {
	char names[] = { 'c', 'd', 'e', 'f', 'g', 'a', 'b', 'C' };
	int tones[] = { 1915, 1700, 1519, 1432, 1275, 1136, 1014, 956 };
	// 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);
	}
	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 / 2);
	}
	}

view raw melody.ino hosted with ❤ by GitHub