import time
time.sleep(0.1) # Wait for USB to become ready
from machine import Pin,PWM,ADC
led=PWM(Pin(17))
led.freq(600)
buzzer=PWM(Pin(16))
buzzer.freq(600)
pot=ADC(Pin(26))
while True:
    raw=pot.read_u16()
    led.duty_u16(raw)
    voltage=(raw/65535)*3.3
    freq=int(200+(raw/65535)*(4000-200))
    buzzer.freq(freq)
    if raw==0:
        buzzer.duty_u16(0)
        continue
    buzzer.duty_u16(32000)