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Thread: Not enough power to USB devices >> Possible Solution?

  1. #1
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    Not enough power to USB devices >> Possible Solution?

    Right now I have one usb wire running up from the back of my car, to the front. There, I have an unpowered usb hub which goes to my screen a spot for a thumbdrive, and a slimline dvd drive. There is not enough power for the drive and the screen at the same time. Rather than running a 5v line to the hub, could I splice the black and red wires heading to the hub, and wire it to directly to the 5v line from the psu, completely bypassing power from the motherboard? I would probably just hack up an old usb extension cable, or even use an internal header, making the job even easier.

    Does anyone see anything wrong w. this?

  2. #2
    Para Laura thanatos106's Avatar
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    If you going to take power from the PSU, why no just run a 5v to the hub?? (if you do it you way you going to wire every single usb)

    I understand what you want but I think that you can be more practical than that and just power up the hub form the PSU.... just my .02



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  3. #3
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    Sorry if I explained poorly. There would be no need to run power to every device in the hub. All I would be doing is feeding the hub a 5v supply with more amps, Essentially using the wires already in the usb wire for the new 5v run.

  4. #4
    Para Laura thanatos106's Avatar
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    Quote Originally Posted by Tuckie
    Sorry if I explained poorly. There would be no need to run power to every device in the hub. All I would be doing is feeding the hub a 5v supply with more amps, Essentially using the wires already in the usb wire for the new 5v run.
    Ok let me see if I get this right..... non power USB taking data +- from MOBO and power +- from PSU right?

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  5. #5
    My man uses Levitra. Peoples's Avatar
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    just a suggestion. I installed the 5v point of load carnetix for power usb devices. This also serves the purpose of not draining my battery throughout the night, because this turns all usb devices off, and you wont get that trickle charge.
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  6. #6
    Para Laura thanatos106's Avatar
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    I use my mean well SD-25 to power my hub and slim load dvd drive so that was my next sugestion to tuckie (a independent device to power the hub)

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    Quote Originally Posted by bgoodman
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  7. #7
    Para Laura thanatos106's Avatar
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    @peoples: is the carnetix 5v point of load standalone??

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    Edit:

    Nevermind I got the answer
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  8. #8
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    because a picture is worth a thousand words

    Alright guys, this is my idea....
    http://tuckie.net/images/usb.jpg

    I plan on plugging this into the motherboard, the power supply, and have the usb extension plug into the female usb port.

    This will then go to the hub, which powers a touchscreen; a dvd slimdrive; and the occasional thumbdrive.

    Does anyone see any problems with this?

  9. #9
    My man uses Levitra. Peoples's Avatar
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    i wouldnt be suprised if it wasnt enough to power it
    ...
    how the hell is that gonna power a touchscreen.....let alone a dvd slimdrive
    PC Components:
    Lilliput; XPC/FLEX mobo; 1.7 ghz P4 Mobile;512 DDR; 160 gb HDD; opus 150; slot usb dvd-rw
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  10. #10
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    It doesn't power the entire touchscreen, just the usb touch interface, i have a zenarc 700tsv this works fine through the hub without any power modification. Its getting the 12 volts from a completely different source. The drive has no problem being powered if I plug it directly into the back of the motherboard, but acts up when going through the hub. So I am trying to provide the hub with more amperage

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