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Discussion in 'MacBook Pro' started by MACDRIVE, Dec 29, 2006.
You've seen them, they're on USB cables. What are they for and are they necessary?
I think they're buffers of some sort.
But I could be waaay off
Those would be Ferrite Cores, they help reduce electrical interference, and are found on many cables other then USB.
If they help reduce electrical interference, why aren't they covering the whole length of the cable?
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.
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?
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.
Just goes to show you that I made the right choice in not studying anything related to electricity
I'd get cables with them just in case. You can never be too careful...
That is the better idea, although if you get interference from a cable without them it is simple to add a ferrite ring.