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Thread: Powered USB hubs

  1. #1
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    Powered USB hubs

    Hello

    Just wondering if anyone out there has self-powered USB hubs (not bus powered) running in their car, and if so how they achieved powering the hub?

  2. #2
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    ClockWorK's Avatar
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    Use the 5 volt wires of a molex connector from the power supply.

  3. #3
    FLAC SNOtwistR's Avatar
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    Another option is using these little guys at point of load. very efficient no heat and takes automotive voltage in no problem http://www.murata-ps.com/data/power/oki-78sr.pdf SNO

  4. #4
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    I was actually looking into getting a powered hub as well. Unfortunately I wasn't thinking clearly on how I would power it, so I'm glad I saw this. My question is, is 1.5 amps really enough? Isn't that roughly what the computers ports put out? I need a little more...I think...on the output. I have four regularly active ports and a fifth that will be on sometimes, 1 touchpad, 2 touchscreen, 3 I don't remember what this is, 4 thumb drive, 5 a signal processor for my sound system that can be switched on/off. My issue is with just 4 the thumb drive seems to draw too much power and shuts down one of the other ports.

  5. #5
    FLAC SNOtwistR's Avatar
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    USB ports are max 500mA so when you plug a non powered hub in you only really have 500mA to spread around. Using a powered hub you give all ports that 500mA. Now in reality, I can't see you drawing a full 2amp on a 4 port hub unless maybe you had 2 harddrive enclosures that like 2 usb ports each. For what you describe in use I would think 1.5amp is fine. You can always check the draw of a device or hub draw in windows control panel. SNO

  6. #6
    Maximum Bitrate rray's Avatar
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    I bought one of those Ram USB Tough HUB powered USB hubs that turns on with the ignition wire, just like a car's audio amp turns on. I like that I can set it to power off after 15 minutes of the ignition being off. 6 ports with 5v 500ma each and runs off the car's 12v makes it an easy, although expensive choice.

  7. #7
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    I dont have a power supply (running laptop) so i need to power it from the car, but Ram USB Tough USB is a bit too expensive for a usb hub....

    I only have 3 ports to play with, and need to connect all these devices...

    2x2.5" hdd,
    webcam,
    video capture card,
    usb volume knob,
    bluetooth keyboard,
    wifi,
    touchscreen,
    odb2,
    gps,
    3g dongle,

  8. #8
    FLAC SNOtwistR's Avatar
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    It looks like you will have 3 hubs as I would not run all that through 1 usb cable. I would use 1 hub for each of your 3 mainboard ports you have and power those using that little regulator 1 for each hub, you should be good. Once it's all together, check your loads on all your ports just to be sure your not hitting max bandwidth or power draw. SNO

  9. #9
    Variable Bitrate
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    Ok, so where do I buy one and how much do they cost. Also, where is the switch to the 5V?

  10. #10
    FLAC SNOtwistR's Avatar
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    Here is the link if this is what you are talking about. http://www.digikey.com/product-detai...6-5-ND/2259781 SNO

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