from machine import Pin,ADC,PWM
from time import sleep
frequency=3000
ldr=ADC(Pin(14))
ldr.width(ADC.WIDTH_10BIT)
ldr.atten(ADC.ATTN_11DB)
led=PWM(Pin(5,Pin.OUT),frequency)
while True:
    ldr_value=ldr.read()
    print(ldr_value)
    volt=(ldr_value*3.3/4096)
    print("volt=",volt)
    
    led.duty(1024-ldr_value)

        
    sleep(1)