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active usb cables?

Discussion in 'General Electronics Discussion' started by swagguy8, Nov 24, 2015.

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  1. swagguy8

    swagguy8

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    Dec 10, 2014
    hey guys, so i wanted to do a project that involved connecting a usb device to my home theater pc that draws significant power (>300ma). I want to be seated on my couch, and have freedom of movement while the cable is not lying in the middle of the room, so i need at least 50ft of usb cable. does anyone know what microchip i could use to make a repeater, or is a 5v source plainly enough for usb?
     
  2. Martaine2005

    Martaine2005

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    May 12, 2015
    Have a read of this.

    Martin
     
    hevans1944, Harald Kapp and davenn like this.
  3. davenn

    davenn Moderator

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    Sep 5, 2009
    nice link Marty :)
     
    Martaine2005 likes this.
  4. swagguy8

    swagguy8

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    Dec 10, 2014
  5. hevans1944

    hevans1944 Hop - AC8NS

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    Jun 21, 2012
    CAT5 is Ethernet cable. USB protocol is an entirely different animal. The Instructables web site is the blind trying to lead the blind; I would not consider it a reliable place for "research" information. The method cited in the link will not work to extend a USB cable.
     
  6. swagguy8

    swagguy8

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    Dec 10, 2014
    i found lots of websites though that said that it will work, like tom's hardware:
    http://www.tomshardware.com/forum/363050-28-cat5-webcam
    i don't know if they are wrong but technically usb is only a digital signal, so as long as the wire isn't too shabby i don't see why it would work, the 5 volt however, i may need an external source.
    what do you think, dave?
     
  7. davenn

    davenn Moderator

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    Sep 5, 2009
    its got nothing to do with USB or or CAT5 protocols
    the CAT 5 cable was just being used as an extension lead

    no its not likely to work as all that is being done is adding extension wire into the middle of the USB cable
    no different to just using a long USB lead ... the cable limitation still applies

    There is one awesome way to to it tho and I use this method

    USB to CAT5 converter D-LINK make them ... I have them here in the workshop model: DUB-E100
    2 of them back to back 2ith a long E-Net cable in between


    IMAG0085aa.jpg

    2 of these back to back will give a long USB link .... max distance, I don't know, the spec sheet doesn't say
    I have done 10m 33ft with no real problems

    Dave
     
    bigone5500 likes this.
  8. swagguy8

    swagguy8

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    Dec 10, 2014
    cat 5 or lan has a huge distance, schools, offices and all sorts of places use them. i'll probably just use soldering hacks and yolo the tx and rx, while providing a power source, since i don't want to spend too much money. thanks for the replys guys
     
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