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Thread: New Product Idea Automotive USB Hub

  1. #61
    Constant Bitrate
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    USB Ports max out at 500ma so I wouldn't worry about that really... And My M2ATXHV is fine powering my 12v screen and 5v hub.

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    Quote Originally Posted by tbird2340 View Post
    So for those that have gotten a 5V Input USB hub and powered it off the 5V rail of a molex connector on their PSU.. Have you had any issues?

    What do you need to watch out for when going this route? Overtaxing the PSU I would presume, right?
    Correct - Pick a high quality stable hub and make sure not to overload your 5 volt rail. Your PSU will also generate more heat now because of the extra power on the 5v rail, so make sure your case has good ventilation.

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    Quote Originally Posted by TheGuv View Post
    USB Ports max out at 500ma so I wouldn't worry about that really... And My M2ATXHV is fine powering my 12v screen and 5v hub.

    It is worth keeping an eye on. If you have 7 ports maxed out at 500ma each that is 3.5amps on the 5v rail. No need for concern, but keep an eye on it to make sure you are staying in spec.

  4. #64
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    Slightly off topic but can someone tell me how to use a multimeter to read how much juice is being drawn? I just watched the latest MP3Car blog and they had the meter connected reading how much was being used..

    I want to do this but not sure what setting to put my meter on and not sure where to put the probes. Thanks!
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  5. #65
    Raw Wave tbird2340's Avatar
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    Also, can someone explain technically what the difference is between using a powered hub like we are talking about compared to a non powered one like this:



    If you used something like the image above would your USB devices not get enough juice?
    Current Vehicle: 2007 Dodge Nitro

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  6. #66
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    @measuring current - here

    The picture you linked to is broken, but the main difference is that with an unpowered hub, your power to the USB devices is split. That is, if you can draw .5 amps to a 4 port unpowered hub, then that is all the power you get for all of the devices you plug into it. Low powered stuff like a mouse or a GPS or a touchscreen can be plugged into this but higher powered stuff like USB drives will probably overload it and won't work.

    A powered hub will provide the full 500 ma for each port.
    Quote Originally Posted by ghettocruzer View Post
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  7. #67
    Raw Wave tbird2340's Avatar
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    Thanks BugByte! The image shows up for me but I don't think you need to see it to know what I'm talking about anyways.. Just a simple non powered USB hub..

    So Wifi cards, bluetooth adapters, and usb sound cards would be fine in those?
    Current Vehicle: 2007 Dodge Nitro

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  8. #68
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    I dunno. Depends on how much power they need. You'll have to check the specs on them and add them up.

    Probably a BT adaptor will work. I wouldn't be so sure about WiFi cards or sound cards.
    Quote Originally Posted by ghettocruzer View Post
    I was gung ho on building a PC [until] just recently. However, between my new phone having internet and GPS and all...and this kit...Im starting to have trouble justfiying it haha.
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  9. #69
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    n00b question. Why wouldn't anybody just use a 4 port non-powered hub? Do you really need 7 more usb slots in addition to the 10 most mobos already have?

    http://www.newegg.com/Product/Produc...rchResult=True

    I'd think an extension from my trunk to the glovebox with 4 inputs for ipod, blackberry etc. would be plenty good enough no?

    What am i missing?
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  10. #70
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    Quote Originally Posted by Belo View Post
    n00b question. Why wouldn't anybody just use a 4 port non-powered hub? Do you really need 7 more usb slots in addition to the 10 most mobos already have?

    http://www.newegg.com/Product/Produc...rchResult=True

    I'd think an extension from my trunk to the glovebox with 4 inputs for ipod, blackberry etc. would be plenty good enough no?

    What am i missing?
    It depends on the install. I use 30 USB devices. That includes three 7 port USB Powered Hubs. You also have to take into effect ports for users, and also upgrading and add ons for the future.
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