What is the output voltage on the XBOX power adapter?
How do I wire my xbox 360 in my car with a dc - dc power supply instead of using a standard 400 w power inverter. I am assuming this will be more efficient and allow more play time with the car turned off.
with a question like this, i'm surprised you are not asking on how to power your screen. especially for a first post, this kind of question will almost always illicit animosity here. just fair warning....
anyway, to answer your question, you just tap into your car 12v power (if you cant find one then run a lead from your battery) for your positive lead, and run a wire to any chasis bolt (or the ground wire if you can find it). these are not difficult to find if you look in your car manual (check out the radio section for an easy place). If you are looking for suggestions to a power supply, the OPUS ATX one is a good choice. combine it with this mod: http://www.hackaday.com/entry/1234000740073473/ and you should be all set.
you are right it is more efficient but you will be chopping off the plug of your xbox and hardwiring your 360 to your car. not exactly sure if you want to do that. you might consider making connectors so u can remove it easily. And in terms of efficiency, playing with your car turned off will sooner or later drain the battery; the benefit you get by saving on the amount of energy lost to inefficient transfer of dc->ac->dc probably isn't significant in terms of extra play time.
12 V = 16.5 A 5VSb = 1A
I already have the 400W power inverter hard wired in the car so I understand that much. It's just that 20 minutes really sucks for play time and that's after buying a optima deep cycle battery. Even if I could just get an hour I would be happy rather then having the xbox shutdown with no warning. Maybe I need to try a different inverter ?
actually you don't want an inverter
you want a dc-dc power supply
Car battery is DC
Power inverter converts DC to AC
XBox power adapter converts AC into DC
So you go DC to AC then back to DC again
whereas a DC-DC power supply takes your unregulated DC battery power (aka not always 12 volts) and converts it to useable regulated DC power (aka always 12 volts so your XBOX doesn't fry)
dtran01 had a good suggestion going with the Opus DC-DC power supply
it would be much more efficient then all the AC and DC converting.
I see what you mean with this solution but it is only 150W and the xbox 360 needs a 203W minimum supply. Do you have any recommendations for this? Also how does it connect to my xbox 360 power cord? I don't have to do any cutting do I ?
Maybe you will get some useful info out of a thread I made about inverters and DC-DC power supplies.
This setup is probably a bad idea..stop me now before its too late
I believe the reason for the 203w number is based on the AC to DC conversion which of course isn't as efficient so that number should be lower in a DC-DC setup. Also DarquePervert has a wonderful thread that you should read. (better do it soon before he yells at you and posts a link to it )
FAQ: Will <insert PSU model> Power Supply work with my system?
Actually, if the output is 203 watts, the efficiency shouldn't come into play, and the input wattage should be higher.