Right my remote on lead is gonna be coming from my Clifford alarm so that when i dis-arm the alarm it boots the PC and vice versa.
i was planning on having a switch in my remote on lead so that if i was putting the car in for a serivce, etc i could flip it and it wouldn't boot next time that the system was dis-armed. so it would normally be closed to allow the signal through
that is switch 2 in the diagram
then i thought about when i get petrol and want to keep the PC on rather than go through a hibernate/resume cycle
if i add a second switch (number 1) could i flip this when i get out of car so that when i arm the alarm (to go pay) it gives the opus a 12v signal still and keeps it running?