I'm not that good in electronics, so i just ask a simple question here.
I have made a device to operate glow-plugs of model-airplanes.
Basically, it is just PWM-generation.
Well, the problem is, that i cant make the PIC "see" if the glow-plug is
actually connected.
It seems to be the old "current-sensing" problem, but i dont want to put
any extra components into this.
This is the circuit so far:

---     12V
P I      I
I I      ---->1
C I      ---->2  to glow-plug
  I      I
  I      I
  I      I
  I     D
  I----G   N-Channel Enhancement-Mode FET, Logic Level
  I     S
  I      I
---      I
        GND


The resistance of the glow plug is around 2-3 ohms.
Any suggestions ?


-------------------------------------------
It's better to light a candle
than to complain about darkness.
                               Confucius