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Thread: Power question

  1. #11
    Variable Bitrate
    Join Date
    Apr 2004
    They make 5V 5A regulators (I think Linear might make one).

    As mentioned don't try to parallel them.

    Also note, if your hub draws 2A you will be dropping ~9V across your regulator generating 18W of heat. You will definitely need a heat sink for that.

    Without knowing the USB spec off the top of my head, and without knowing how many ports you have, I am going to guess USB provides for 500ma per port (and a guess is you have 4 ports) for 2A, and then 100ma to run the logic in the hub.

    It is entirely possible you will need a very miniscule heat sink for this, just be aware of it.

    For the capacitors put a .01uF and a 10uF on both input and output (maybe a bit bigger one on the output) and you should be fine.

  2. #12
    Maximum Bitrate binary.h4x's Avatar
    Join Date
    Jun 2003
    Fairfax, VA
    The caps I would got with a .01uF and a 1000uF rated AT LEAST 24V

    you could rip apart the wall adapter and see what kind of goodies it has.
    2007 Honda Fit Sport 1.5L SOHC-VTEC

  3. #13
    Low Bitrate cyber's Avatar
    Join Date
    Jun 2004
    Frozen Tundra
    Ok, I went by rat shack and picked up a .01uF and 1000uF capacitors as well as a small square of bread board, small project box, and heat sink and thermal paste. I looked at voltage regulators and all they had were 5v at 1amp so I found a 5v 3amp on the internet and ordered it. One more question, which capacitor goes where? 1000uF on the input side or the output?

  4. #14
    FLAC ppgt94's Avatar
    Join Date
    May 2001
    Hey Cyber let me know how this works out. I have the same issue.

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