Buzzer and TonalBuzzer in Raspberry Pi - Mini Project: Build & Apply

Controlling a Buzzer and TonalBuzzer on Raspberry Pi

📖 Scenario: You have a Raspberry Pi connected to a buzzer and a tonal buzzer. You want to control them using Python to make sounds and tones.

🎯 Goal: Build a Python program that sets up a buzzer and a tonal buzzer, plays a simple beep sound, then plays a tone at a specific frequency.

📋 What You'll Learn

Create a Buzzer object on GPIO pin 17

Create a TonalBuzzer object on GPIO pin 18

Play a beep sound on the buzzer

Play a 440 Hz tone on the tonal buzzer

Print messages indicating each action

💡 Why This Matters

🌍 Real World

Buzzers are used in alarms, timers, and notifications in many devices. Controlling them with a Raspberry Pi helps you build interactive electronics projects.

💼 Career

Understanding how to control hardware components like buzzers is useful for jobs in embedded systems, IoT development, and hardware prototyping.

1

Setup Buzzer and TonalBuzzer objects

Import Buzzer and TonalBuzzer from gpiozero. Create a buzzer object on GPIO pin 17 and a tonal_buzzer object on GPIO pin 18.

Raspberry Pi

# Import Buzzer and TonalBuzzer and create buzzer on pin 17 and tonal_buzzer on pin 18
# Your code here

Need a hint?

Use from gpiozero import Buzzer, TonalBuzzer to import the classes. Then create buzzer = Buzzer(17) and tonal_buzzer = TonalBuzzer(18).

2

Create a beep duration variable

Create a variable called beep_duration and set it to 1 (one second).

Raspberry Pi

from gpiozero import Buzzer, TonalBuzzer

buzzer = Buzzer(17)
tonal_buzzer = TonalBuzzer(18)

# Create beep_duration variable set to 1
# Your code here

Need a hint?

Just write beep_duration = 1 to set the beep duration to one second.

3

Play beep and tone

Use buzzer.on() and buzzer.off() with sleep(beep_duration) to play a beep. Then use tonal_buzzer.play(440) to play a 440 Hz tone for beep_duration seconds, then stop it with tonal_buzzer.stop(). Import sleep from time.

Raspberry Pi

from gpiozero import Buzzer, TonalBuzzer
from time import sleep

buzzer = Buzzer(17)
tonal_buzzer = TonalBuzzer(18)

beep_duration = 1

# Play beep on buzzer
# Play 440 Hz tone on tonal_buzzer
# Your code here

Need a hint?

Turn buzzer on, wait, then off. Then play tone 440 Hz, wait, then stop.

4

Print status messages

Print "Beep sound played" after the buzzer beep, and print "440 Hz tone played" after the tonal buzzer tone.

Raspberry Pi

from gpiozero import Buzzer, TonalBuzzer
from time import sleep

buzzer = Buzzer(17)
tonal_buzzer = TonalBuzzer(18)

beep_duration = 1

buzzer.on()
sleep(beep_duration)
buzzer.off()
print("Beep sound played")

tonal_buzzer.play(440)
sleep(beep_duration)
tonal_buzzer.stop()
print("440 Hz tone played")
# Your code here

Need a hint?

Use print("Beep sound played") and print("440 Hz tone played") after each sound.