#define ALLTIME_5V

#ifdef ALLTIME_5V
if (T <= MAX_TEMP)

    {
#else
#endif

      dP = Max - Min;
      if (T < MIN_TEMP)
      {
        T = MIN_TEMP;
      }
      T = T - MIN_TEMP;
      PWM_ = ((dP / DT) * T);
      PWM_ = PWM_ + Min;
      goto e1;
    }

#ifndef ALLTIME_5V
#endif

    if (T > MAX_TEMP)
    {
      PWM_ = 255;
      FanStoped = 0;
      Beep();
    }

    e1:
   OCR0A=PWM_;
}
}