Startup pulse fix with Jeff Shutdown Controller
I found a nice and relatively easy fix for those who are using laptops or atx mobos with no auto turn on feature in bios.
Just add a relay, a cap and resistor. See image below.
You get a nice 2 second pulse on the ATX wire ( connects to ground) when you first turn on the car. Then the shutdown controller takes care of everything when you turn off the car. Basically you are getting a pulse whenever the switched 12V line goes from off to on.
This is an old drawing I made of the controller years ago and I just edited a bit.
Hope helps those of you with that problem.
If you are looking to build the whole controller go to www.carpc.tk for a detailed description of all the parts.