from machine import Pin, PWM
import time

buzzer = PWM(Pin(18))
def play_note(freq, ms, duty=512):
    if freq == 0:          # 0 означає паузу
        buzzer.duty(0)
    else:
        buzzer.freq(freq)
        buzzer.duty(duty)
    time.sleep_ms(ms)
    buzzer.duty(0)
    time.sleep_ms(30)
# Мелодія «Happy Birthday»
# Кожен елемент: (частота_Гц, тривалість_мс)
# 0 = пауза
happy_birthday = [
    (262, 300), (262, 150), (294, 450),  # Happy Bir-
    (262, 450), (349, 450), (330, 900),  # -thday to you
    (262, 300), (262, 150), (294, 450),  # Happy Bir-
    (262, 450), (392, 450), (349, 900),  # -thday to you
    (262, 300), (262, 150), (523, 450),  # Happy Bir-
    (440, 450), (349, 300), (330, 300), (294, 600),  # -thday dear...
    (466, 300), (466, 150), (440, 450),  # Happy Bir-
    (349, 450), (392, 450), (349, 900),  # -thday to you
]
# Граємо мелодію
for freq, ms in happy_birthday:
    play_note(freq, ms)