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10-17-2007, 11:26 AM
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#31
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Neither darque nor pervert
Join Date: Apr 2004
Location: Elsewhere
Posts: 12,910
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Quote: Originally Posted by greatwhite  Hmmm............
I just either use a 12v battery or plug my atx power supply into the standard connectors on the MB.
Simple and works fine for me!
Yeah, but that doesn't test your PSU, only the PC hardware. 
__________________
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10-17-2007, 11:43 AM
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#32
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FLAC
Join Date: May 2007
Location: Top o' the world Ma!
Posts: 1,281
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Quote: Originally Posted by DarquePervert Yeah, but that doesn't test your PSU, only the PC hardware.
Hmmm, DP, I'm not sure I understand how you mean it "doesn't test your psu".
12v battery to the dsatx and she fires up and shuts down with a connection simulating acc. Seems that would be a better test of the DC-DC psu as that's what it'll be running off in the car.
But yes, I use the atx power supply when I want to do extended testing on the os or a complete reload in the house. Just seems more conveineint to me.
I guess I just don't see the point of hacking up an atx supply to get what you would from a battery which would be more realistic of a test.
Different strokes I 'spose..............
Maybe I'm missing something here?
__________________
For once you have tasted flight you will walk the earth with your eyes turned skywards, for there you have been and there you will long to return.
Leonardo Da Vinci
Last edited by greatwhite; 10-17-2007 at 11:48 AM.
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12-22-2007, 02:50 PM
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#33
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Low Bitrate
Join Date: Oct 2006
Posts: 99
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well i tried this out today and it fired up perfecty fine for the first time in my build.
i used a battery charger i have in my garage.
this is the one: here
NEG and POS off my m2-atx to the proper clamps on to the battery charger. On the ACC line i wired in a switch and then connected it to the POS on the charger also.
i tried it on the 5amp setting first but it wouldnt start up. it would try but then turn off. i switched it to the 15amp and it fired up fine. i started/shutdown using the switch 3 times with no problem.
__________________
95 Mustang 5.0
Custom Case, VIA m10000, 512 MB, 80gig, M2-ATX, Slot Load DVD, 7" LCD Touchscreen
80% done
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12-23-2007, 08:14 AM
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#34
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Neither darque nor pervert
Join Date: Apr 2004
Location: Elsewhere
Posts: 12,910
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Quote: Originally Posted by greatwhite Hmmm, DP, I'm not sure I understand how you mean it "doesn't test your psu".
Connecting the ATX power supply right to the motherboard of your carPC doesn't test your DC-DC PSU.
I should have been more clear.
Quote: Originally Posted by Dan95five0 well i tried this out today and it fired up perfecty fine for the first time in my build.
i used a battery charger i have in my garage.
this is the one: here
NEG and POS off my m2-atx to the proper clamps on to the battery charger. On the ACC line i wired in a switch and then connected it to the POS on the charger also.
i tried it on the 5amp setting first but it wouldnt start up. it would try but then turn off. i switched it to the 15amp and it fired up fine. i started/shutdown using the switch 3 times with no problem.
Not everyone has a battery charger at their disposal, but yours is a good idea.
You can also use a spare car battery. Again, not everyone has a spare car battery.
Some have 12v power supplies that put out enough amperage to power their vehicle computer. Again, it's something that not everyone has.
Granted, not everyone has a spare ATX PSU lying around either...
Most PC geeks (like myself and many others on this forum) tend to have PC parts about, including a PSU.
Understand that this FAQ was written up as a CHEAP way to power your PC inside. It's also a cheap way to do it using stuff that some people may already have.
__________________
LOOKING FOR THE FAQ? IT'S HERE.
You never found that link, did you? Why? It's hard to find in the NavBar across the top of the forums, amongst a lot of other crap.
TELL MP3CAR YOU WANT A LINK TO THE FAQ IN A MORE OBVIOUS, NOTICABLE LOCATION HERE.
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12-30-2007, 08:05 PM
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#35
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Newbie
Join Date: Aug 2007
Posts: 16
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the pics by vlad are great. just what i need to setup indoors. thanks to all for input
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02-28-2008, 01:24 AM
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#36
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FLAC
Join Date: Nov 2007
Posts: 919
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Using the Old ATX supply laying around, and following Darqu and Vlads posts's, I did this in all of 3 minutes, and it workded great! Thanks...
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05-16-2008, 04:47 PM
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#37
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Newbie
Join Date: Nov 2007
Location: UK
Posts: 1
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This is an amazing "how to" took me about 10 mins to set up (and that included finding wires and connectors in the toolbox!)
Thanks guys.
Kipple
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09-03-2008, 07:07 PM
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#38
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Newbie
Join Date: Jul 2008
Location: Panama City, Florida
Posts: 54
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I have a radio shack AC to DC converter. Will that work It only has a - and + Termnial. Can provide a constant 25amps if needed and provides 13.8v.
Will that work. Its been to run car amps in my home before?
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09-04-2008, 02:03 AM
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#39
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Raw Wave
Join Date: Apr 2000
Location: Surrey, UK
Posts: 2,129
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Quote: Originally Posted by Ringfinger69 I have a radio shack AC to DC converter. Will that work It only has a - and + Termnial. Can provide a constant 25amps if needed and provides 13.8v.
Will that work. Its been to run car amps in my home before?
yes.
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09-12-2008, 01:04 AM
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#40
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Newbie
Join Date: Jun 2008
Posts: 29
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For the people who are finding that their 12V rail is only putting out 8-9V, this can sometimes be caused by not having a load on the 5V rail.
Some power supplies will not run correctly if there is only a load on the 12V rail, and nothing on the 5V
If you get this problem, try taking one of the spare molex connectors, and just plug in an old spare hard drive, or CDROM.
I have been using AT and ATX power supplies for some of my networkable garden lighting project, and some supplies are happy to just have a draw on the 12V rail, but some wouldn't work unless there was a current draw on the 5V rail as well.
So give it a bash, see how it goes with a spare hard drive plugged in! 
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09-22-2008, 11:35 PM
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#41
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Variable Bitrate
Join Date: May 2008
Posts: 237
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How do I wire up the switch to simulate turning the car on and off?
Can someone post a detailed pic?
I saw Vlads, and sorta understand it, but I'm not sure what terminal I connect the white wire off the M2-ATX to and then what wire I tap into off the the ATX PSU.
Any help would be appreciated.
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09-23-2008, 06:28 AM
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#42
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Neither darque nor pervert
Join Date: Apr 2004
Location: Elsewhere
Posts: 12,910
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I used a momentary switch from a PC. The switch has three pins. One is four voltage in, one for voltage out and one for ground, I'm pretty sure. Since this is in-line with the power, you don't need a ground wired up. You're just using this as a simple switch to close the connection on a +12v line.
__________________
LOOKING FOR THE FAQ? IT'S HERE.
You never found that link, did you? Why? It's hard to find in the NavBar across the top of the forums, amongst a lot of other crap.
TELL MP3CAR YOU WANT A LINK TO THE FAQ IN A MORE OBVIOUS, NOTICABLE LOCATION HERE.
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02-02-2009, 10:20 PM
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#43
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Variable Bitrate
Join Date: Jan 2009
Posts: 372
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really nice hack  i am installing windows right now and it took me 10 min to conect all the wires
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02-03-2009, 07:09 AM
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#44
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Newbie
Join Date: Jul 2008
Location: Panama City, Florida
Posts: 54
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i used my trunk switch for a push button for the opus. Gotta use a key now to open my trunk. When i build a new clear case for my rig i'll return the trunk button to its original use and install a new momentary switch.
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05-09-2009, 11:48 PM
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#45
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Variable Bitrate
Join Date: Jan 2009
Location: Iowa
Posts: 326
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What am I doing wrong?
I've got a Rosewill 400Watt PSU that I'm trying to use to power the M4-ATX.
I've got a male molex hacked into my "ignition" switch.
It has 12V, Accessory, and Ground.
I tried running it several different ways I could think of but in no scenario would it start the computer up.
The D2 light will blink when the desktop PSU is on, which from what I've learned is that this is the "standby" light.
The light on the switch will come on when I flip it on, the computer will not boot though.
1) I've got the 12V from male molex into 12V on the switch, and a wire from 12V to positive M4.
2) I've got the ground from male molex into ground on the switch, and a wire from ground to ground on M4.
3) I've got accessory from the switch to ignition on the M4-ATX.
Flip the switch, blue LED comes on, no boot though.
Advice?
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