Buzzer

Introduction

A piezoelectric buzzer is an audio signalling device. A sample piezoelectric buzzer is shown below.

Typical uses include alarm devices, timers and confirmation of user input such as a mouse click or keystroke.

Example Project

Hardware Preparation

• Arduino Duemilanove or Compatible Arduino Controller (1 unit)
• Buzzer (1 unit)
• Prototyping Shield (1 unit)
• Mini Breadboard (1 unit)
• Jumper Cables (2 units)

Programming

<syntaxhighlight lang="c"> //For Arduino Start kit //Compatible with all Arduino version // //

int buzzer=8;//Connect the buzz positive Pin to Digital Pin 8 void setup() {

 pinMode(buzzer,OUTPUT);//Set Pin Mode as output

} void loop() {

 unsigned char i,j;
 while(1)
 {
   for(i=0;i<80;i++) //Sound effect 1
   {
     digitalWrite(buzzer,HIGH);//Make some sound
     delay(1);//Delay 1ms
     digitalWrite(buzzer,LOW);//Be quiet 
     delay(1);//Delay 1ms
   }
   for(i=0;i<100;i++) //Sound effect 2
   {
     digitalWrite(buzzer,HIGH);//Make some sound
     delay(2);//Delay 2ms
     digitalWrite(buzzer,LOW);//Be quiet
     delay(2);//Delay 2ms
   }
 }

} </syntaxhighlight>