import time
from machine import Pin, ADC, PWM

# Analog input (e.g. potentiometer)
adc = ADC(Pin(26))

# PWM output to LED
led = PWM(Pin(11))
led.freq(1000)

while True:
    value = adc.read_u16()
    duty = value
    print(duty)
    led.duty_u16(duty)
    time.sleep(0.1)