PinoutSearch

Play a Melody on a Piezo Buzzer (Arduino)

Play a simple tune with tone() on a passive piezo buzzer. Learn frequencies, arrays, and loops.

Beginner20 min

What you need

Wiring

Arduino Uno
Piezo buzzer

Hover a pin or a wire to trace the connection.

Code

buzzer_melody.ino
// Play an 8-note scale on a passive piezo buzzer with tone().
const int buzzer = 8;
int melody[] = { 262, 294, 330, 349, 392, 440, 494, 523 }; // C4 to C5

void setup() {}

void loop() {
  for (int i = 0; i < 8; i++) {
    tone(buzzer, melody[i], 300); // play note for 300 ms
    delay(350);                   // small gap between notes
  }
  noTone(buzzer);
  delay(1000);
}

Steps

  1. Wire the buzzer: + (signal) to D8, − to GND.
  2. Use a passive buzzer (tone() sets the pitch); an active buzzer only beeps.
  3. Upload to hear the scale repeat.
  4. Swap the numbers in melody[] for different notes.