DC-DC ATX power supply
Printed From: the12volt.com
Forum Name: General Discussion
Forum Discription: General Mobile Electronics Questions and Answers
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=43795
Printed Date: May 10, 2024 at 3:12 AM
Topic: DC-DC ATX power supply
Posted By: crook
Subject: DC-DC ATX power supply
Date Posted: November 25, 2004 at 8:05 PM
anyone know of any good dc-dc atx power supplies?
Replies:
Posted By: Francious70
Date Posted: November 25, 2004 at 10:16 PM
For computers??
https://www.tigerdirect.com
Paul -------------
Posted By: crook
Date Posted: November 26, 2004 at 2:08 AM
ya for computers, but i dont mean regular house power to pc power supply, i mean a pc power supply that runs on 12v DC...
Posted By: Francious70
Date Posted: November 26, 2004 at 8:51 AM
I don't think I've ever heard of one of those. You could dis-assemble the Power supply and find where the power comes out of the AC-DC converter. Then connect that to you battery and see what happens.
Paul
-------------
Posted By: samis
Date Posted: November 28, 2004 at 3:03 AM
Posted By: bdl666
Date Posted: November 30, 2004 at 7:29 AM
Posted By: gasflame
Date Posted: November 30, 2004 at 8:33 AM
For the price of the dc to dc converter you could just buy a DC to AC inverter and plug the comp into it . The price on those things has come way down.
Posted By: ninjaxryder
Date Posted: December 03, 2004 at 2:10 PM
yeah i was planning to do that too....is it enough just to plug the computer into the power inverter then to the cigarette lighter or is there more to it??
Posted By: gasflame
Date Posted: December 03, 2004 at 2:30 PM
Just plug it in and let it rip Make sure that the inverter you buy is as large or slightly larger than that of your computer supply power INPUT requirements. The 120vac input ratings should be on the tag on one of the sides of the computer power supply unit.
Posted By: ninjaxryder
Date Posted: December 03, 2004 at 2:38 PM
aight....lets say that my comp power supply is 300 watts......so does that mean i have to buy an inverter that supports 300 watts and up....
Posted By: gasflame
Date Posted: December 03, 2004 at 2:44 PM
No you need to check the input rating The 300 watts is the output only that number does not include the fan or the efficeincy losses of the supply. if the input rateing is in amps multiply the volts X amps ie 120 X 1.2 amps= 144 watts @ 120vac so get an inverter that could do 150 to 200 watts.
Posted By: ninjaxryder
Date Posted: December 03, 2004 at 3:12 PM
coo thanks....also let's say i turn off the engine to chill...i know the power stays on but if i wanna start the car...would it reboot the comp...if so where or what would i do to make that not happen...case it would be a hassle turning it on and off when u make a quick stop
Posted By: gasflame
Date Posted: December 03, 2004 at 9:55 PM
I checked my power supplies when I got home. A typical 300 watt ATX power supply requires 120 volts ac @ 6 amps. So 120 X 6= 720 watts. You will need an inverter that can supply aprox 800 to 1000 watts at 120 volt. Or simply a 1000 watt inverter. A 500 watt ATX supply requires 10 amps at 120VAC or 1200 watts. I would get a 1500 watt inverter in this case. Hope this helps. Chuck
Posted By: naador
Date Posted: December 04, 2004 at 11:20 PM
The point about the system rebooting is exactly why I would recommend using an acual car pc power supply for this application. It will actually control the motherboard's soft power functions based on voltage from a remote turn on lead. Very cool stuff. Using an iverter, while it will certainly function is too me kinda like a hack job. But that's just me. And I havn't done THAT much research, there may be a good way to control the computers powere with the inverter/standard power supply method.
Sorry if that's long winded, but I hope it helps. If you haven't already, read the manual for one of those car pc powere supplys off of mp3car.com. I did and it was quite enlightening :-)
Posted By: naador
Date Posted: December 04, 2004 at 11:52 PM
Ok, it just so happened that after posting I happened on another thread that listed a product that could be used to control a system's power.
www.mini-box.com
it's under power solutions>ITPS
(if you hadn't previously read that post)
that would make a somewhat more polished setup, although it doesn't have as many shutdown options as some of the 12V-12V power suplies. For example the power suply that I had read the manual for could be set up to wait 20 seconds after the ignition was switched off before it shut down the computer, were the ITPS is fixed at 5 seconds. It's all a matter of what your particular needs are tho, and both options are very good.
|