from machine import ADC, PWM, Pin
import utime

s = PWM(Pin(0))
s.freq(50)  

adc = ADC(2)

while True:
    pot = int(adc.read_u16() * 180 / 65535)
    print(pot)  
    ton = 1000000 + (pot * 1000000 / 180)
    s.duty_ns(int(ton))
    utime.sleep_ms(200)