from utime import sleep
sleep(0.1) # Wait for USB to become ready

from machine import ADC, Pin,PWM
pot = ADC(Pin(26))  # create ADC object on ADC pin
led = PWM(Pin(0), freq=2000)
while 1:
    value=input("insert led value:")
    print("adc value is",value)
    led.duty_u16(int(value))

    sleep(0.5)