Buzzer

There are two types of buzzer that raspidevkit support, the Active` and the Passive` type of buzzers

The connection diagram of the two buzzer is just the same as shown below:

Buzzer	Raspberry Pi
VCC	GPIO23
GND	GND

Active Buzzer

Active buzzers produces a constant sound frequency when voltage is given to its pins and can be controlled just like an LED by turning it on or turn_off

import raspidevkit
import time

machine = raspidevkit.Machine()
buzzer = machine.attach_active_buzzer(23)
buzzer.turn_on()
time.sleep(3)
buzzer.turn_off()

Passive Buzzer

Unlike active buzzers, a passive buzzer can change the sound it produces by depending on the frequency supplied.

Playing a Note

You can try simulating a note by using the soundutil helper package. It is also possible to add a duration on how many seconds you want to play the note

import raspidevkit
from raspidevkit.utils import soundutil
import time

machine = raspidevkit.Machine()
buzzer = machine.attach_passive_buzzer(23)
C3 = soundutil.get_note_frequency('C3')
buzzer.play_note(C3)
# Play with duration included
buzzer.play_note(C3, duration=3)

Playing Music

You can also play music by creating a music sheet like list indicating the notes and beats each note is going to take.

import raspidevkit
from raspidevkit.utils import soundutil
import time

machine = raspidevkit.Machine()
buzzer = machine.attach_passive_buzzer(23)
notes = ['C3', 'C3', 'E3', 'F3', 'A2']
beats = [4, 4, 4, 8, 16]
buzzer.play_note(soundutil.get_note_frequency('C3'))