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Thread: Is DC powered USB hub good idea?

  1. #1
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    Is DC powered USB hub good idea?

    Hi, I've search but didn't really find the info I need. Did find something about the Opus adapter tho but is not what I need. I have my PC in the trunk while running a 15ft usb extension to a USB hub in front of the car. The hub will connect to Touch Screen, game controller and a usb DVD drive there.

    Do you think I would need a external powered USB for the DVD drive?

    If so, I am thinking about a DC powered not from the M1-ATX but from regular car's 12v or 5v supply? I am thinking this will help take some load off M1-ATX, yes or no?

    All the external powered usb hub comes with only AC, are they usually converts to 5v input? In that case I can just connect to any 5v supply in my car?

    Last question, the 5v power would have to remote power (only power when key in ign) correct? Otherwise the equipment will still be running even when the car is off and that is bad right?

  2. #2
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    I'd say hook up all your USB items and see if your computer gives you the "exceeding voltage" message. I know XP will warn you if you are over your USB power supply voltage...think 98 will also so the alarm and if you have a motherboard monitoring program, that will show you. I've got my USB touch screen (7"), USB DVD, USB Motorola Wireless, and a Pharos USB GPS running without issue on a compaq laptop.

  3. #3
    Para Laura thanatos106's Avatar
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    If so, I am thinking about a DC powered not from the M1-ATX but from regular car's 12v or 5v supply? I am thinking this will help take some load off M1-ATX, yes or no?

    Good idea. (so you don't stress you main PSU)

    All the external powered usb hub comes with only AC, are they usually converts to 5v input? In that case I can just connect to any 5v supply in my car?

    Yes. (if you have a 5v regulated available in you car)

    Last question, the 5v power would have to remote power (only power when key in ign) correct? Otherwise the equipment will still be running even when the car is off and that is bad right?

    Yes. (connect to ACC line or search the foorum for how to run it together with you main PSU).


    For what you need check for mean well PSU and the carnetix point of load.

    http://www.power-factor-1st.com/shop...ard/sd-25.html

    http://www.mp3car.com/store/product_...roducts_id=139


    BTW I use the mean well unit to power my slom load drive and a 4 usb hub.

    Thanatos.
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  4. #4
    FLAC aoLhaTer's Avatar
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    Quote Originally Posted by thanatos106
    If so, I am thinking about a DC powered not from the M1-ATX but from regular car's 12v or 5v supply? I am thinking this will help take some load off M1-ATX, yes or no?

    Good idea.
    How is this a good idea???
    USB hubs were not built to withstand the varying voltages as seen in cars. Youll likely destroy it
    You want regulated power going into the hub

    Quote Originally Posted by civic5zigen
    All the external powered usb hub comes with only AC, are they usually converts to 5v input? In that case I can just connect to any 5v supply in my car?
    All powered hubs are DC, not AC. They include an AC adpater that converts from AC to DC so that you can plug the hub into your home

  5. #5
    Para Laura thanatos106's Avatar
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    Quote Originally Posted by aoLhaTer
    How is this a good idea???
    USB hubs were not built to withstand the varying voltages as seen in cars. Youll likely destroy it
    You want regulated power going into the hub


    All powered hubs are DC, not AC. They include an AC adpater that converts from AC to DC so that you can plug the hub into your home

    It is good idea to take stress form the M1 atx that is what I meant!

    That is why I posted two links and said "for what you need", so is no like I sent the guy to power the hub streight from the batt.


    Thanatos.
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    Quote Originally Posted by bgoodman
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  6. #6
    Constant Bitrate
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    So USB hub needs regulated power supply as well, then it makes sense to use power from PSU then. Thanks guys.

    Here's what I have running off the hub...
    -GPS
    -Bluetooth
    -Wifi
    -Gamepad
    -PDA thumb keyboard
    -Want to add USB DVD in future

    Do you think I need an external powered hub for sure?
    Or seperate it in two hub which gets power from two different port?
    Or feed everything form hub except for the USB DVD which will be using extension cable to connect to one of the USB port?

  7. #7
    Para Laura thanatos106's Avatar
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    Yes that is the keyword: REGULATED

    That is why I'm going to edit my 1st post.

    Thanatos.
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    Quote Originally Posted by bgoodman
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