Buzzer with Arduino

Overview
A buzzer or beeper is an audio signalling device, which may be mechanical, electromechanical, or piezoelectric. Typical use of buzzers and beepers include alarm devices, timers, and confirmation of user input such as a mouse click or keystroke.

Interfacing the Buzzer

Connecting Buzzer to a microcontroller is really simple. The Buzzer uses only two pins GND, and a pin to any of the Arduino digital pin.

Code

/*
* Buzzer and Arduino
*
*
*/
const int buzzer = 8; //buzzer to arduino pin 9

void setup(){
  pinMode(buzzer, OUTPUT); // Set buzzer - pin 8 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
}