Buzzer Module

Introduction

This buzzer module will generate around the audible 2kHz range.

Schematics

• Schematics

Application Ideas

<syntaxhighlight lang="c"> int speakerPin = 9; int length = 15; // the number of notes char notes[] = "ccggaagffeeddc "; // a space represents a rest int beats[] = { 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 4 }; int tempo = 300; //////////////////////////////////////////////////// void playTone(int tone, int duration) {

 for (long i = 0; i < duration * 1000L; i += tone * 2) 
 {     
     digitalWrite(speakerPin, HIGH);     
     delayMicroseconds(tone);     
     digitalWrite(speakerPin, LOW);     
     delayMicroseconds(tone);   
 } 

} //////////////////////////////////////////////////// void playNote(char note, int duration) {

 char names[] = { 'c', 'd', 'e', 'f', 'g', 'a', 'b', 'C' };   
 int tones[] = { 1915, 1700, 1519, 1432, 1275, 1136, 1014, 956 };     // play the tone corresponding to the note name   
 for (int i = 0; i < 8; i++) 
 {     
   if (names[i] == note) 
   {       
       playTone(tones[i], duration);     
   }   
 } 

} ////////////////////////////////////////////// void setup() {

 pinMode(speakerPin, OUTPUT); 
 pinMode(11, OUTPUT);
 digitalWrite(11, LOW);   

} ///////////////////////////////////////////// void loop() {

 for (int i = 0; i < length; i++) 
 {     
    if (notes[i] == ' ') 
    {       
        delay(beats[i] * tempo); // rest     
    }
    else 
    {       
       playNote(notes[i], beats[i] * tempo);     
    }       // pause between notes     
    delay(tempo / 2);    
 } 

} </syntaxhighlight>

How to buy

Here to buy Buzzer Module on store