from machine import Pin, PWM,ADC

from time import sleep
pwm0 = PWM(Pin(21))
pwm0.freq(50)

adc = ADC(Pin(32))

adc.atten(ADC.ATTN_11DB)
adc.width(ADC.WIDTH_12BIT)

def map(x, in_min, in_max, out_min, out_max):

  return int((x - in_min)*(out_max - out_min) / (in_max - in_min)+out_min)



while True:
  for step in range(25, 125):
    pwm0.duty(step)
    sleep(0.1)
 for step in range(125, 25, -1):
 pwm0.duty(step)
 sleep(0.1)


  adc_value = adc.read()



  pwm0.duty(map(adc_value , 0, 4095, 25, 125))

  volts = (3.3* adc_value)/4095
  input_voltage = " The input voltage is {:0.2f} volts and raw value is {:4d}"
  print(input_voltage.format(volts, adc_value), end = "\r")

 if t<0 and t >0.5:
       
        pwm0.duty(step)

    elif t<0.5 and t >1:
      
        pwm0.duty(306)

    elif t <1 and t >1.5:
     
         pwm0.duty(767)

    else:
        pwm0.freq(50)
        pwm0.duty(511)