from machine import Pin , PWM , ADC
from time import sleep

pot=ADC(Pin(26))

led=PWM(Pin(0))
led.freq(1000)

while True:
    volt=pot.read_u16()
    voltage=(volt/65535)*5
    print("voltage : {:.2f}V".format(voltage))
    led.duty_u16(volt)
    sleep(0.5)