Arduino Buzzers & tone() Function | Task 4

In this task, you'll learn how to control an active buzzer using two handy functions: tone() to play a sound and noTone() to stop it.

Using the tone() function:

• Select Your Pin: Identify the Arduino pin connected to your active buzzer.
• Play a Sound: Use tone(pin, frequency); where:
  • pin is the buzzer’s Arduino pin
  • frequency is how fast it vibrates, in Hertz (e.g., 1000 for a high beep)
• Control Duration: Use delay() right after to define how long the sound plays.

Using the noTone() function:

• Stop the Sound: Use noTone(pin); to stop the buzzer on the specified pin.

Example:

If your buzzer is connected to pin 8, you can do the following:

// Example using tone() and noTone()

int buzzPin = 8;
int dtOn = 1000;
int dtOff = 500;
int noteFreq = 1000;

void setup() {
  // put your setup code here, to run once:
  pinMode(buzzPin, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  tone(buzzPin, noteFreq);
  delay(dtOn);
  noTone(buzzPin);
  delay(dtOff);
}

        

These functions let you create precise beeps, alerts, or even simple tunes. Try experimenting with different frequencies and durations!