Hi everyone. I have a quick question. I'm trying to devise a circuit that works off my car locks. Basically they get a negative pulse, which starts a latched relay, which will power up the ACC line going to the startup/shutdown controller. I've included a picture of my current circuit but I've noticed one problem. In order to stop the chained relay (stuck-on) action you need to kill the 12volts going to it. So, I have it rigged to pin1 of the parallel por,t though a molex conntor would work two. Here's the issue: The moment the PC turns on the ACC line turns back off. This in turn tells the controller to shut down. Hmmph. I was wondering if I throw it on pin 2 or 3, and have a program that waits oh ... 2 minutes, then turns ON the pin, if it'll work. Only problem is that start-up sequence tends to be a bit of a pain, and flashes the pins. Any ideas?
BTW, part of the schematic is form the12volt.com
Michael - holly poop on a stick
michael - sorry about that. I messed up that part of the schematic. The aprallel port should be powering the relay. Rotate it 90 degrees :-D
The Fused 12v+ is the 12v from the battery. The "Constant 12v" is the output of the circuit. When it receives a pulse from the locks, it then turns it itno an constant 12v. That would go into the ACC line with diodes. I'm working on my newer version now, so you all can see it.