Skip to main content

Buzzer

The Buzzer class controls Eliobot's passive buzzer. It allows you to play tones, musical notes and predefined sounds.

Initialization​

import board
import pwmio
from elio import Buzzer

buzzer_pin = pwmio.PWMOut(board.IO17, variable_frequency=True)
buzzer = Buzzer(buzzer_pin)

Basic methods​

play_tone(frequency, duration, volume)​

Plays a tone at a given frequency.

ParamètreTypeDescription
frequencyfloatFréquence en Hz
durationfloatDurée en secondes
volumeintVolume (0–100)
buzzer.play_tone(440, 0.5, 80)  # La4 pendant 0.5 seconde

play_note(note, duration, NOTES_FREQUENCIES, volume)​

Plays a note from a frequency dictionary.

NOTES = {
    "Do": 262,
    "Re": 294,
    "Mi": 330,
    "Fa": 349,
    "Sol": 392,
    "La": 440,
    "Si": 494,
    "silence": 0.1,
}

buzzer.play_note("Do", 0.5, NOTES, 80)
buzzer.play_note("silence", 0.25, NOTES, 0)  # pause
tip

Use the value 0.1 to represent a rest in the note dictionary.

sweep(start, end, dur, steps=10, pause=0.01)​

Scans a frequency range from start to end in steps steps over dur seconds.

buzzer.sweep(500, 1500, 0.3, steps=12)

Preset sounds​

The class includes a collection of ready-to-use sounds:

MéthodeDescription
sound_startup()Son de démarrage
sound_hello()Salutation
sound_happy()Son joyeux
sound_win()Victoire
sound_sad() (non disponible)—
sound_jump()Saut
sound_land()Atterrissage
sound_laser()Effet laser
sound_explosion()Explosion
sound_bump()Collision
sound_error()Erreur
sound_alert()Alerte (bip répété)
sound_question()Interrogation
sound_blink()Petit bip court
sound_music() (non disponible)—
buzzer.sound_startup()
buzzer.sound_hello()
buzzer.sound_happy()
buzzer.sound_win()
buzzer.sound_jump()
buzzer.sound_land()
buzzer.sound_laser()
buzzer.sound_explosion()
buzzer.sound_bump()
buzzer.sound_error()
buzzer.sound_alert()
buzzer.sound_question()
buzzer.sound_blink()

Complete example — playing a melody​

import board
import pwmio
from elio import Buzzer

buzzer_pin = pwmio.PWMOut(board.IO17, variable_frequency=True)
buzzer = Buzzer(buzzer_pin)

NOTES = {
    "Do": 262,
    "Re": 294,
    "Mi": 330,
    "Fa": 349,
    "Sol": 392,
    "La": 440,
    "Si": 494,
    "silence": 0.1,
}

melodie = [
    ("Do", 0.3),
    ("Re", 0.3),
    ("Mi", 0.3),
    ("Sol", 0.6),
    ("silence", 0.2),
    ("La", 0.5),
]

for note, duree in melodie:
    buzzer.play_note(note, duree, NOTES, 80)