5.2 Active Buzzer

Hardware Wiring

Active Buzzer

Sketch

The code can be found at Examples_Arduino - sensor-kit-for-arduino - _010_ActiveBuzzer - _010_ActiveBuzzer.ino.

int speakerPin = 8; // Define speaker's pin, here 8
int potPin = 4;     // Define the pin to control the adjustable resistor
int value = 0;
void setup() {
  pinMode(speakerPin, OUTPUT);
}
void loop() {
  value = analogRead(potPin); // Read the analog value of the adjustable resistor's pin
  digitalWrite(speakerPin, HIGH);
  delay(value); // adjust the buzzing time
  digitalWrite(speakerPin, LOW);
  delay(value); // adjust the NOT buzzing time
}