noTone() to stop sound in Arduino - Mini Project: Build & Apply

Using noTone() to Stop Sound on Arduino

📖 Scenario: You have a small buzzer connected to your Arduino. You want to play a sound for a short time and then stop it.

🎯 Goal: Build a simple Arduino program that plays a tone on a buzzer and then stops the sound using noTone().

📋 What You'll Learn

Create a variable for the buzzer pin number

Set the buzzer pin as an output

Use tone() to play a sound on the buzzer

Use noTone() to stop the sound

💡 Why This Matters

🌍 Real World

Stopping sounds on devices like alarms, timers, or notifications is common in electronics projects.

💼 Career

Understanding how to control hardware like buzzers is useful for embedded systems and IoT jobs.

1

Set up the buzzer pin

Create an integer variable called buzzerPin and set it to 8. Then, in the setup() function, use pinMode(buzzerPin, OUTPUT); to set the buzzer pin as an output.

Arduino

int buzzerPin = 8;

void setup() {
  pinMode(buzzerPin, OUTPUT);
  // Your code here
}

void loop() {
  // Your code here
}

Hint

Remember to declare buzzerPin as an integer and set it to 8. Then use pinMode inside setup().

2

Play a tone on the buzzer

In the loop() function, use tone(buzzerPin, 1000); to play a 1000 Hz tone on the buzzer.

Arduino

int buzzerPin = 8;

void setup() {
  pinMode(buzzerPin, OUTPUT);
}

void loop() {
  // Your code here
}

Hint

Use the tone() function with buzzerPin and frequency 1000.

3

Stop the tone using noTone()

After playing the tone, use noTone(buzzerPin); to stop the sound. Add a delay of 1000 milliseconds before stopping the tone.

Arduino

int buzzerPin = 8;

void setup() {
  pinMode(buzzerPin, OUTPUT);
}

void loop() {
  tone(buzzerPin, 1000);
  // Your code here
}

Hint

Use delay(1000); to wait one second, then call noTone(buzzerPin); to stop the buzzer.

4

Print a message when the tone stops

After stopping the tone with noTone(buzzerPin);, add Serial.begin(9600); in setup() and use Serial.println("Tone stopped"); in loop() to print the message.

Arduino

int buzzerPin = 8;

void setup() {
  pinMode(buzzerPin, OUTPUT);
  // Your code here
}

void loop() {
  tone(buzzerPin, 1000);
  delay(1000);
  noTone(buzzerPin);
  // Your code here
}

Hint

Initialize serial communication in setup() and print the message after stopping the tone in loop().