Not typical question

Discussion in 'Digital Cameras' started by Kamyk, May 18, 2006.

  1. Kamyk

    Kamyk Guest

    Hello all!

    I have bought a digital internet camera which is connected to my computer.
    I would like to ask you how long the USB cable can be not to lost a signal
    from camera.
    I would like to enlarge the length of the USB cable, because I want to see
    what it is
    happening in the other room.

    Thank you for the answers
    Martin from Poland
     
    Kamyk, May 18, 2006
    #1
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  2. Kamyk

    Cynicor Guest

    USB cables can run from 3 to 5 meters. The official USB site explains
    why. If you need longer, I suggest looking into a wireless camera.

    http://www.usb.org/about/faq/ans5/
     
    Cynicor, May 18, 2006
    #2
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  3. Kamyk

    Rudy Benner Guest

    How about putting a hub in the middle?
     
    Rudy Benner, May 18, 2006
    #3
  4. I wonder whether anyone makes a fiber-optic extender for USB. USB cable
    goes into converter box, fiber comes out the other end. 500 feet later,
    another converter turns the fiberlink back into regular USB. Done right,
    it would be transparent to the peripherals.

    I've seen such beasts for RS232 and GPIB, so I imagine that USB should
    be straightforward.

    -dms
     
    Daniel Silevitch, May 18, 2006
    #4
  5. Kamyk

    ASAAR Guest

    High quality (expensive) video, RS-232 and Ethernet cables can
    greatly extend the usable distance without needing to add
    amplification or repeaters. The cables have much lower signal
    losses, partially due to lower resistance, mostly due to lower
    capacitance. I suspect that USB cables are no different.

    Transmission speed also counts, so USB 2.0 High Speed hardware
    (including cables) should be capable of working much greater
    distances when used at USB 1.0 speeds. But this is just a guess,
    not being based on any actual experience.
     
    ASAAR, May 18, 2006
    #5
  6. Kamyk

    Cynicor Guest

    Sounds like Ethernet would be a lot cheaper and more common.
     
    Cynicor, May 18, 2006
    #6
  7. Not if you need big distances. Ethernet would also need repeaters over
    sufficiently large distances.

    A quick Google on 'USB fiber' turned up a bunch of hits, including
    http://www.opticomm.com/USB-511___139
    which maxes out at 500 meters. Ethernet-based extenders seem to top out
    at about 100 meters.

    -dms
     
    Daniel Silevitch, May 18, 2006
    #7
  8. And, looking a bit further on the same website, we have
    http://www.opticomm.com/USB-520___151
    which is a ten kilometer USB2.0 solution. I wouldn't want to try that
    with regular old Cat 5 Ethernet.

    And yes, I'm well aware that this is massive overkill for the original
    question.

    -dms
     
    Daniel Silevitch, May 18, 2006
    #8
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