Taking the feed from the PSU is not really an option, because I want it to power up the camera ONLY when in reverse....
or could you take a +12 volt feed from the computer PSU?
put it on a relay powered by the PSU and triggered by the reverse light
Why the **** do you put it in reverse when parked???????
Yeah, why reverse when parked? Either do first gear, or remove from reverse prior to cranking....
2005 Range Rover 4.4
Any ideas for putting a PC in this? :)
I got used to putting it in reverse. A bad habit maybe, but nothing will change that now. I am BOUND to put it in reverse after parking, no matter how hard I try not to... been doing this for too long.
Unless you don't care about the longevity of your camera then you should NOT wire it directly to the reverse lights. The voltage is simply not stable, and unless you have a very high-quality camera that is designed to have a wide voltage input range then you can't expect it to be able to handle receiving an unstable power supply for very long before dying.
It is so very simple to just get a $5 12V SPDT relay and wire it in to the reverse lights and camera. This will give the camera a regulated 12V from your CarPC's PSU ONLY when in reverse. The Xenarc will also correctly auto-switch. Problem solved.
4 wires go to the relay:
1. Regulated 12V Input from PSU
3. Unregulated 12V from reverse lights (this is your "trigger")
4. Regulated 12V output to the camera
Jackboot, you da man. Very informative post! Will do just that. Too bad I already had removed all the panels and wired the stuff through... will have to do it all over again... a lot of internal panels involved. grrr!!!
If you've already run one wire to the camera, just use that wire to pull 4 new wires (or 2 long wires folded in half)...hopefully then you won't have to take off all the interior panels again! Good luck