Trunk Popper into Car Starter
Just got a Viper 562t car starter installed and it has a trunk popper lead (AUX button on remote) I'd like to use to start my ATX computer. The computer will always have constant 12V power from battery, so I need to trigger the 12V power switch pins on the mobo.
Problem is that the starter outputs a -12V (200mA) signal. The amperage I'm not worried about - more than enough, but how do I turn negative into positive?
Here are two options I've identified:
1) Use a relay. Seems like overkill for a few hundred milliamps being triggered for a second or two.
2) Since the starter output is negative, could I wire it directly to the mobo pow-on positive connector? Would a mobo require current through the negative connector?
Does anyone else have any ideas?