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Thread: Power to USB hub

  1. #1
    Newbie
    Join Date
    Dec 2005
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    20

    Power to USB hub

    In what cases to you need to power your USB hub ?

    The reason I am asking is that I have 4 port usb hub with 4 devices plugged in it: touch screen, car2pc adapter, keyboard, gps. Occasionally I "lose" 1 or 2 devices: I need to unplug all devices and plug them back in to fix it. Does this happen because it has not enough power or because I have buggy noname hub ?

  2. #2
    Constant Bitrate jontz's Avatar
    Join Date
    Dec 2007
    Location
    Osceola, IN
    Posts
    158
    Usually you lose devices because of low power, but it could be your no name hub too As a rule, I always power USB hubs. They just seem to be more reliable that way.

  3. #3
    Constant Bitrate
    Join Date
    Sep 2004
    Posts
    210
    If you draw more than 500ma of power, then you need to power the USB hub. General rule states the USB hub itself draws power, car2pc probably does, keyboard and gps definitely do.

    so go ahead and power it up!

  4. #4
    Newbie
    Join Date
    Dec 2005
    Posts
    20
    In that case I'll just purchase a new one that has 7 ports and power it up

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