Buzzer Reference

A piezo buzzer that produces sound when driven with a square wave — typically via the built-in tone() function.

Pin names

Attributes

This component has no configurable attributes.

Usage

Connect pin 1 to a GPIO pin and pin 2 to GND. Use tone(pin, frequency) to play a note, and noTone(pin) to stop.

const int BUZZER_PIN = 8;

void setup() {
  // no pinMode needed — tone() configures the pin
}

void loop() {
  tone(BUZZER_PIN, 440);  // A4
  delay(300);
  noTone(BUZZER_PIN);
  delay(300);
}

Play a short melody using tone() with a duration argument:

const int BUZZER_PIN = 8;
int notes[] = {262, 294, 330, 349, 392}; // C D E F G

void setup() {
  for (int n : notes) {
    tone(BUZZER_PIN, n, 200);
    delay(250);
  }
}

void loop() {}

Examples

See also

• Servo — another common single-pin PWM-driven actuator