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Thread: Has anyone ever done this in their carpc install?

  1. #1
    Maximum Bitrate locs4dayz's Avatar
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    Lightbulb Has anyone ever done this in their carpc install?

    I have been having a problem with my power inverter powering my carpc. The power inverter work fine, just not with the pc. I began searching online looking for a inexpensive dc-dc psu(the one I have now doesn't seem to be working), when I came across this article

    http://web2.murraystate.edu/andy.bat...owersupply.htm

    I am wondering about a way to power my pc in my car with a converted old power supply(I have a few lying around, but will convert, if it can be done, the one already in my pc most likely)? Has anyone experimented with this type of project hack and made one to run off dc instead of ac before? Better than spending more loot...lol!!!
    Linux(Learning the curve...Like when driving!!!)
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  2. #2
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    Bugbyte's Avatar
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    If the inverter is working fine but not on the pc, it is probably not outputting a good enough sine wave for you power supply. More expensive inverters will output "true sine wave" but others have been able to get their setups to work without that expense.

    You have to figure out if it is A) the inverter; B) the power supply; C) whether you should ditch the current setup and go to something else.

    I'd recommend a dc-dc power supply simply for the autostart feature and forget the inverter.
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    Raw Wave Rob Withey's Avatar
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    Quote Originally Posted by locs4dayz View Post
    I have been having a problem with my power inverter powering my carpc. The power inverter work fine, just not with the pc. I began searching online looking for a inexpensive dc-dc psu(the one I have now doesn't seem to be working), when I came across this article

    http://web2.murraystate.edu/andy.bat...owersupply.htm
    That link is for building a bench power supply to run from AC to produce DC voltages. It is nothing to do with DC-DC.
    Quote Originally Posted by locs4dayz View Post
    I am wondering about a way to power my pc in my car with a converted old power supply(I have a few lying around, but will convert, if it can be done, the one already in my pc most likely)? Has anyone experimented with this type of project hack and made one to run off dc instead of ac before? Better than spending more loot...lol!!!
    Easiest way - buy a DC-DC power supply.
    Harder way, look for Presslabs forward converter to convert a standard ATX PSU to DC-DC. It's difficult, inefficient and may not work. Oh, and it's probably a lot more expensive than you hope.
    Old Systems retired due to new car
    New system at design/prototype stage on BeagleBoard.

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    Maximum Bitrate locs4dayz's Avatar
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    Quote Originally Posted by Bugbyte View Post
    If the inverter is working fine but not on the pc, it is probably not outputting a good enough sine wave for you power supply. More expensive inverters will output "true sine wave" but others have been able to get their setups to work without that expense.

    You have to figure out if it is A) the inverter; B) the power supply; C) whether you should ditch the current setup and go to something else.

    I'd recommend a dc-dc power supply simply for the autostart feature and forget the inverter.
    Which do you recommend for a m10000 mobo?
    Linux(Learning the curve...Like when driving!!!)
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  5. #5
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    I think a long time ago someone attempted this, but it was a ton of work basically rebuilding the ATX psu. And you still wouldnt have a shut down controller. DC-DC psu's are so cheap these days, I dont think it's worth the effort attempting to rebuild an ATX psu.

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    Raw Wave Rob Withey's Avatar
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    Quote Originally Posted by Rob Withey View Post
    Harder way, look for Presslabs forward converter to convert a standard ATX PSU to DC-DC. It's difficult, inefficient and may not work. Oh, and it's probably a lot more expensive than you hope.
    Quote Originally Posted by nobb View Post
    I think a long time ago someone attempted this, but it was a ton of work basically rebuilding the ATX psu. And you still wouldnt have a shut down controller. DC-DC psu's are so cheap these days, I dont think it's worth the effort attempting to rebuild an ATX psu.
    Yes, Presslab, like I said.

    Linky for those too lazy to search : http://www.mp3car.com/vbulletin/powe...converter.html
    Old Systems retired due to new car
    New system at design/prototype stage on BeagleBoard.

  7. #7
    Raw Wave
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    Thanks Rob - that's a good link.

    In the 6 to 9 years since however, I would have expected much to have changed in the dc-dc area so the ATX conversion may not be as attractive.
    (Mind you, I bought an ATX for $10 as they were cheaper than the 12V 2A supplies I needed for a water pump project. So now I have over 10A, and a nice safe way of putting a mains/wall-socket device into standby... But that's different to efficient dc-dc conversion with ultra-low standby currents etc.)

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