from machine import Pin, ADC
from utime import sleep
sensor = ADC(26)
green_led = Pin(16, Pin.OUT)
red_led = Pin(18, Pin.OUT)
max_d=1.0
min_d=0.1
while True:
    raw = sensor.read_u16()
    delay = min_d + (raw / 65535)*(max_d-min_d)
    red_led.toggle()
    print(raw,delay)
    sleep(delay)