Buzzer Melody Experiment

Buzzer Melody Experiment

Introduction

A passive buzzer can be used to produce various tones and melodies by varying the frequency of the signal sent to it. In this experiment, we demonstrate how to generate a simple melody using an Arduino and a buzzer.

Components Needed

Circuit Setup

Connect the buzzer to the Arduino as follows:

Note: If you're unsure about your buzzer type, test its polarity before connecting.

Code for Buzzer Melody

Upload the following code to your Arduino to play a melody:


// Define pin for the buzzer
#define BUZZER_PIN 8

// Define melody notes using their frequencies (in Hz)
#define NOTE_C4  262
#define NOTE_D4  294
#define NOTE_E4  330
#define NOTE_F4  349
#define NOTE_G4  392
#define NOTE_A4  440
#define NOTE_B4  494
#define NOTE_C5  523

// Melody and duration arrays
int melody[] = {NOTE_C4, NOTE_D4, NOTE_E4, NOTE_F4, NOTE_G4, NOTE_A4, NOTE_B4, NOTE_C5};
int durations[] = {500, 500, 500, 500, 500, 500, 500, 500}; // All notes 500 ms

void setup() {
    pinMode(BUZZER_PIN, OUTPUT); // Set buzzer pin as output
}

void loop() {
    // Play the melody
    for (int i = 0; i < 8; i++) {
        tone(BUZZER_PIN, melody[i], durations[i]); // Play note
        delay(durations[i] * 1.3);                // Wait for note duration (slightly longer)
        noTone(BUZZER_PIN);                       // Stop the tone before the next note
    }
    delay(2000); // Pause before repeating melody
}

Explanation

Applications of Buzzers

Buzzers are commonly used in:

Troubleshooting