Remote turn on

narayan · 04-22-2008, 05:18 PM

Hi, im new to posting on this forum but have been lurking for a few years now waiting to get a decent car worth putting a PC in. I have 1 question before i install every thing. can i use the head unit remote to turn my pc on instead of a switching ignition feed? saves running another cable to the rear

thanks

Furian · 04-22-2008, 07:17 PM

Depends if your head unit has an aux, ret, or other switched power output in the rear. Many do, many don't. Personally, I built my own switch because I really don't like the idea of the pc coming on and off when I so much as go 5 minutes to the grocery store.

Simple switch:
Cat5 cable leads from power and led headers on mb to front of vehicle
Cat5 receiver splits cable into wires
small plastic box, red push button, 2 leds, makes switch for 5$ from radioshack
power on, power off,

Especially if you are not replacing the head unit, I find this to be quite easy.

You would also need to have more of a plan because whether you are using an inverter or a dc-dc psu and several other things factor into this.

good luck

FusionFanatic · 04-22-2008, 11:00 PM

Quote: Originally Posted by narayan

can i use the head unit remote to turn my pc on instead of a switching ignition feed? saves running another cable to the rear

the HU's REM output is a simple 12vdc switched output, just like your car's ACC or IGN circuits. so yes, you can use it in place of the car's ACC/IGN circuits.

just like your car's ACC or IGN circuits, you can use the 'REM' line as a signal wire to turn the PSU on or to control a relay (to cut power to the PSU when the car is off).