Passive Buzzer

Note

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Kit purchase

Looking for parts? Check out our all-in-one kits below — packed with components, beginner-friendly guides, and tons of fun.

Name	Includes Arduino board	PURCHASE LINK
Ultimate Sensor Kit	Arduino Uno R4 Minima	BUY
Elite Explorer Kit	Arduino Uno R4 WiFi	BUY
3 in 1 Ultimate Starter Kit	Arduino Uno R4 Minima	BUY
Universal Maker Sensor Kit	×	BUY

Course Introduction

In this lesson, we will learn how to use the Passive Buzzer Module with Arduino.

Note

If this is your first time working with an Arduino project, we recommend downloading and reviewing the basic materials first.

Required Components

In this project, we need the following components:

SN	COMPONENT INTRODUCTION	QUANTITY	PURCHASE LINK
1	Arduino UNO R4 Minima	1	BUY
2	USB Type-C cable	1
3	Breadboard	1	BUY
4	Wires	Several	BUY
5	Passive Buzzer Module	1	BUY

Wiring

Common Connections:

Passive Buzzer Module
- I/O: Connect to 8 on the Arduino.
- －: Connect to GND on the Arduino.
- +: Connect to 5V on the Arduino.

Writing the Code

Note

You can copy this code into Arduino IDE.
Don’t forget to select the board(Arduino UNO R4 Minima) and the correct port before clicking the Upload button.

/*
  This example demonstrates how to play simple melodies
  using a passive buzzer module and the tone() function.

  Board: Arduino Uno R3 / Uno R4
  Component: Passive Buzzer Module (e.g. KY-006)
  Pin connection:
    - Buzzer signal pin -> Digital pin 8
    - VCC -> 5V
    - GND -> GND

  Note:
  Two melodies are included in this sketch.
  Only ONE melody should be active at a time.
  The other melody is commented out and can be enabled if needed.
*/

#include "pitches.h"

const int buzzerPin = 8;

// ------------------------------------------------------------
// Melody selection
// Uncomment ONE melody block below to play the desired song
// ------------------------------------------------------------

// Melody 1: Ode to Joy (Beethoven) - one section
/*
int melody[] = {
  NOTE_E4, NOTE_E4, NOTE_F4, NOTE_G4,
  NOTE_G4, NOTE_F4, NOTE_E4, NOTE_D4,
  NOTE_C4, NOTE_C4, NOTE_D4, NOTE_E4,
  NOTE_E4, NOTE_D4, NOTE_D4
};

int noteDurations[] = {
  4, 4, 4, 4,
  4, 4, 4, 4,
  4, 4, 4, 4,
  2, 4, 2
};
*/

// Melody 2: Happy Birthday (classic version)
int melody[] = {
  NOTE_G4, NOTE_G4, NOTE_A4, NOTE_G4, NOTE_C5, NOTE_B4,
  NOTE_G4, NOTE_G4, NOTE_A4, NOTE_G4, NOTE_D5, NOTE_C5,
  NOTE_G4, NOTE_G4, NOTE_G5, NOTE_E5, NOTE_C5, NOTE_B4, NOTE_A4,
  NOTE_F5, NOTE_F5, NOTE_E5, NOTE_C5, NOTE_D5, NOTE_C5
};

int noteDurations[] = {
  4, 4, 4, 4, 4, 4,
  4, 4, 4, 4, 4, 4,
  4, 4, 4, 4, 4, 4, 4,
  4, 4, 4, 4, 4, 4
};

void setup() {
  // Calculate the total number of notes in the melody
  int notes = sizeof(melody) / sizeof(melody[0]);

  // Play the melody once
  for (int i = 0; i < notes; i++) {

    // Calculate note duration
    // 1000 ms = one whole note
    // 4 = quarter note, 8 = eighth note, etc.
    int noteDuration = 1000 / noteDurations[i];

    // Generate the sound at the given frequency
    // Duration is controlled manually using delay()
    tone(buzzerPin, melody[i]);

    // Keep the note playing for the calculated duration
    delay(noteDuration);

    // Stop the sound before the next note
    noTone(buzzerPin);

    // Short pause between notes for better clarity
    delay(noteDuration * 0.3);
  }
}

void loop() {
  // The melody is played once in setup().
  // No repetition is needed in loop().
}