How to use a buzzer/piezo speaker with Arduino
Hello there, in this tutorial we’ll use a buzzer or piezo-speaker with its two versions (3 pins module and 2 pins component), It’s very simple to use, the buzzer convert an electrical signal to a sound by making vibration movements, it depends on the signal frequency we get a proportional sound. It’s a handy module for security systems or used as an alarm for many sensors.
Both buzzers I used are passive buzzers, passive means they require an external AC signal to be able to produce a sound, for our example we gonna use the Arduino “Tone” function to generate an adequate signal, for the active ones all they need is a DC signal… the passive is the most usual, that’s why I used it.
Wirings:
Here are the wirings of different types and they works with the same codes
Codes:
There are few important functions to be able to use the buzzer which are:
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tone(pin, frequency) |
“tone” function can have two versions: one with only the pin and its frequency, then the other where you add also the duration.
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tone(pin, frequency, duration) |
to shut the buzzer you must use the function below, otherwise it will keep going.
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noTone(pin) |
Ino Codes: Download here or:
Code 1: Simple buzzing sound with a tone change
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//This code is to use with a buzzer if you're using the module with 3 pins wire the I/O with D8 //If you're using the other version wire the (+) pin with 8 //Refer to https://surtrtech.com/ for more information //Emitting 1KHz sound for 1s and then 2KHz sound for 1s int buzzer = 8; void setup() { pinMode(buzzer,OUTPUT); } void loop() { tone(buzzer, 1000); // tone() is the main function to use with a buzzer, it takes 2 or 3 parameteres (buzzer pin, sound frequency, duration) delay(1000); tone(buzzer, 2000); // You can also use noTone() to stop the sound it takes 1 parametere which is the buzzer pin delay(1000); } |
Code 2: Gradually sweeping between a frequency range
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//This code is to use with a buzzer if you're using the module with 3 pins wire the I/O with D8 //If you're using the other version wire the (+) pin with 8 // Refer to https://surtrtech.com/ for more information //Increasing sound freqency from 100Hz to 2KHz then decreasing frequency from 2KHz to 100Hz int buzzer = 8; void setup() { pinMode(buzzer,OUTPUT); } void loop() { for(int i=100 ; i<2000 ; i++){ // loop for to increase the sound frequency tone(buzzer, i); delay(10); //You can change the delay if you want to make it longer or shorter } for(int i=2000 ; i>100 ; i--){ tone(buzzer, i); delay(10); } } |
Code 3: Star Wars theme (I took it from here  https://gist.github.com/nicksort/4736535 )
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const int c = 261; const int d = 294; const int e = 329; const int f = 349; const int g = 391; const int gS = 415; const int a = 440; const int aS = 455; const int b = 466; const int cH = 523; const int cSH = 554; const int dH = 587; const int dSH = 622; const int eH = 659; const int fH = 698; const int fSH = 740; const int gH = 784; const int gSH = 830; const int aH = 880; const int buzzerPin = 8; const int ledPin1 = 12; const int ledPin2 = 13; int counter = 0; void setup() { //Setup pin modes pinMode(buzzerPin, OUTPUT); pinMode(ledPin1, OUTPUT); pinMode(ledPin2, OUTPUT); } void loop() { //Play first section firstSection(); //Play second section secondSection(); //Variant 1 beep(f, 250); beep(gS, 500); beep(f, 350); beep(a, 125); beep(cH, 500); beep(a, 375); beep(cH, 125); beep(eH, 650); delay(500); //Repeat second section secondSection(); //Variant 2 beep(f, 250); beep(gS, 500); beep(f, 375); beep(cH, 125); beep(a, 500); beep(f, 375); beep(cH, 125); beep(a, 650); delay(650); } void beep(int note, int duration) { //Play tone on buzzerPin tone(buzzerPin, note, duration); //Play different LED depending on value of 'counter' if(counter % 2 == 0) { digitalWrite(ledPin1, HIGH); delay(duration); digitalWrite(ledPin1, LOW); }else { digitalWrite(ledPin2, HIGH); delay(duration); digitalWrite(ledPin2, LOW); } //Stop tone on buzzerPin noTone(buzzerPin); delay(50); //Increment counter counter++; } void firstSection() { beep(a, 500); beep(a, 500); beep(a, 500); beep(f, 350); beep(cH, 150); beep(a, 500); beep(f, 350); beep(cH, 150); beep(a, 650); delay(500); beep(eH, 500); beep(eH, 500); beep(eH, 500); beep(fH, 350); beep(cH, 150); beep(gS, 500); beep(f, 350); beep(cH, 150); beep(a, 650); delay(500); } void secondSection() { beep(aH, 500); beep(a, 300); beep(a, 150); beep(aH, 500); beep(gSH, 325); beep(gH, 175); beep(fSH, 125); beep(fH, 125); beep(fSH, 250); delay(325); beep(aS, 250); beep(dSH, 500); beep(dH, 325); beep(cSH, 175); beep(cH, 125); beep(b, 125); beep(cH, 250); delay(350); } |
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Yassine View All
Automation and Electrical Engineer, Electronics amateur trying to share my little projects.
Loved readinng this thank you