What are these cord things for?

Discussion in 'MacBook Pro' started by MACDRIVE, Dec 29, 2006.

  1. MACDRIVE macrumors 68000

    MACDRIVE

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    #1
    [​IMG]

    You've seen them, they're on USB cables. What are they for and are they necessary?
     
  2. dllavaneras macrumors 68000

    dllavaneras

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    #2
    I think they're buffers of some sort.

    But I could be waaay off
     
  3. todd2000 macrumors 68000

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    Danville, VA
    #3
    Those would be Ferrite Cores, they help reduce electrical interference, and are found on many cables other then USB.
     
  4. dllavaneras macrumors 68000

    dllavaneras

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    #4
    If they help reduce electrical interference, why aren't they covering the whole length of the cable?:confused:
     
  5. jsw Moderator emeritus

    jsw

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    Andover, MA
    #5
    For the same reason that you don't need a water filter along the whole length of the pipes in your house. :)

    It does the job fine in just one location along the (relatively short) line.
     
  6. MACDRIVE thread starter macrumors 68000

    MACDRIVE

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    #6
    Well, the reason why I ask is because some of the USB cords on the market don't have them. So if all of you had a choice between having one on your cord and not having one, which would you choose? :confused:
     
  7. jsw Moderator emeritus

    jsw

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    #7
    I'd choose one with the filter. It can't hurt and might help. But I don't think it really matters in most cases.
     
  8. dllavaneras macrumors 68000

    dllavaneras

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    #8
    Just goes to show you that I made the right choice in not studying anything related to electricity :p

    I'd get cables with them just in case. You can never be too careful...
     
  9. eluk macrumors 6502a

    eluk

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    Dec 14, 2006
    Location:
    East London, UK
    #9
    That is the better idea, although if you get interference from a cable without them it is simple to add a ferrite ring.
     

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