from machine import Pin, PWM
import time

speaker_pin_nr = 13
speaker = PWM(Pin(speaker_pin_nr))

## C-Dur Tonleiter :c ′ : 264 H z , d ′ : 297 H z , e ′ : 330 H z , f ′ : 352 H z , g ′ : 396 H z , a ′ : 440 H z und c ″ : 528 H z .

c_dur_liste = [264, 297, 330, 352, 396, 440,494,  528]


speaker.duty_u16(65535//2) #Lautstaerke



for ton in c_dur_liste:
    speaker.freq(ton)
    time.sleep(3)

# PWM-Signal abschalten
speaker.deinit()