Passive Piezoelectric Buzzer 3-24V Buzzer COM22

Description

Resonant Frequency (Unit: Hz)

All things have a specific frequency at which they tend to vibrate. This frequency is called the resonant frequency. For buzzers, the resonant frequency is the frequency at which they will be the loudest.

Impedance (Unit: ohm)

Electrical impedance is the ratio of applied voltage to current. The electrical impedance varies with frequency.

Getting started with the Passive piezoelectric buzzer 3-24V Buzzer 

In this tutorial you will learn how to use a buzzer or piezo speaker with Arduino. Buzzers can be found in alarm devices, computers, timers and confirmation of user input such as a mouse click or keystroke.

Hardware required

• Arduino uno

• Breadboard

• Buzzer / piezo speaker

• 100 Ohm resistor (optional)

Connecting the Hardware

 

 

CODE

const int buzzer = 9; //buzzer to arduino pin 9


void setup(){
 
  pinMode(buzzer, OUTPUT); // Set buzzer - pin 9 as an output

}

void loop(){
 
  tone(buzzer, 1000); // Send 1KHz sound signal...
  delay(1000);        // ...for 1 sec
  noTone(buzzer);     // Stop sound...
  delay(1000);        // ...for 1sec
  
}

RESULTS

It’s simple, tone(buzzer, 1000) sends a 1KHz sound signal to pin 9, delay(1000) pause the program for one second and noTone(buzzer) stops the signal sound. The loop() routine will make this run again and again making a short beeping sound.

(you can also use tone(pin, frequency, duration) function)

Play with the project now by changing the code. For example, try to change sound signal “1000” (1KHz) to “500” (500Hz) or delay time and see how it changes the program.