beerbucket

Hi All,

Just getting started on my first carputer project, and have acquired the above Opus power supply from a friend.

I looked up the datasheet:

http://www.opussolutions.com/pdfs/DC...-15-MAR-04.pdf

On page 3 it says to connect the input connector pin 3 to "ignition or power switch".

My question is this: is it looking for a momentary pull-up to 12v on this line, or does this line need to be *held* up at 12v to keep the PC running? Another way of asking this might be: do I connect to the START or the RUN position on the key barrel?

I think it probably needs to be held up at 12v to keep running, then it sends the shutdown signal after the 12v disappears, but I thought I should check. :-)

Thanks in advance!

MP3Car.com

 

DarquePervert

Your thinking is 100% spot on. It needs to be held at ~12v for the PSU to remain on.

When the voltage drops to 0v, the PSU sends the pulse to the motherboard to trigger shut down. It essentially simulates a press of the power button, which Windows interprets and handles accordingly.

__________________

MP3Car.com