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

frequency = 5000
led = PWM(Pin(23), frequency)

adc = ADC(Pin(34))
adc.atten(ADC.ATTN_11DB)

while True:
    value = int(adc.read()*0.25)
    led.duty(value)
    duty = (value*100)/1023
    print("Value :" , value)
    print("Duty Cycle:", int(duty))
    sleep(0.02)