from machine import Pin
from machine import ADC
from time import sleep

pot = ADC(26)
factor = 3.3 / 65535
led = Pin(12,Pin.OUT)

def map (s, a1, a2, b1,b2):
  return b1 + (s-a1) * (b2-b1) / (a2 - a1)


while True:
     raw = pot.read_u16()
     delay = map(raw,0,65535,0,1)
     volts = raw * factor
     print("raw:", raw, "voltage :",volts)
     led.value(1)
     sleep(delay)
     led.value(0)
     sleep(0.5)