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Thread: n00b... This whole power supply thing has me confused... need clarification

  1. #1
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    n00b... This whole power supply thing has me confused... need clarification

    So is it ok to wire in a PW-120A and ITPS directly to my car's battery? No need to build anything else to clean up the voltage and whatnot? will it work properly when the battery voltage fluctuates from 12.1 - 14.4 during normal driving?

    I plan on using a laptop hard drive and a slim DVD drive w/ an M10000

  2. #2
    FLAC Pudge's Avatar
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    I'm not sure about the ideal-ness of the ITPS, Threads have been popping up about their innefectiveness, however, about "cleaning up the voltage" the ITPS has a regulator (plz correct if i'm wrong).

  3. #3
    FLAC shakes's Avatar
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    according to what mini-box says ... it is ok to run it straight off the batter as long as you don't have any 12v components in the PC. if you're using a laptop hard drive and cd rom, it should be ok.

    mini-box says the PS just passes the input voltage on to the PC so you wont hurt the PS and the mobo won't care what's on the 12v rail either. The only concern is the components.

    i'm not using any 12v components but i'm regulating my power anyway. Not taking any chances.
    My JeepPC Install

    "there are no stupid questions, just stupid people."

    "it's been agreed the whole world stinks so no one's taking showers anymore"

  4. #4
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    What about the voltage fluctuations while the car is in operation? Will the power supply provide the proper power when at 12.1v?

    So I should be fine as long as I don't use any 12v components... yay.

    the mobo only runs off 1.5v, 3.3v, and 5v rails then? I've never really looked at ATX connector diagrams

  5. #5
    FLAC shakes's Avatar
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    voltage fluctuations really only matter to the items using the 12v rail. the ps conditions the 1.5, 3, and 5v lines. only the 12v rail will matter because the ps doesn't touch that line.

    and yes everything on the motherboard uses 5 and below (on the mini-itx anyway)

    remember i'm just going by what the power.pdf from mini-box says about using unregulated power. so if something breaks don't blame me. as i said i'm regulating my power just to be safe

    and you definately need to regulate the power going to your LCD.
    My JeepPC Install

    "there are no stupid questions, just stupid people."

    "it's been agreed the whole world stinks so no one's taking showers anymore"

  6. #6
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    damn, I had forgotten about regulating the LCD...

    at the risk of being flamed for not searching, do you have links where I can buy a 12v regulator or plans on how to build one? please, kthnx

  7. #7
    Constant Bitrate
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    Quote Originally Posted by G_Loc
    damn, I had forgotten about regulating the LCD...

    at the risk of being flamed for not searching, do you have links where I can buy a 12v regulator or plans on how to build one? please, kthnx
    You could just use the one you got with your LCD! Lilliput ships with one, I think most LCDs do.

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