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What is the ring which wires wrap through and around?

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Dr Zero:


--- Quote from: dirkomatic on July 17, 2009, 08:53:04 pm ---oh...

So I need one then?!?!

Crap.

I'm planning on splicing these into a DB25 cable so I can put the board in the cabinet instead of in the wheel...  I'm not going to be able to wrap the DB25 cable through and around this ring.

Digikey has a bunch of them...  Which one would be the right one to get?

--- End quote ---

Eh probably not but for like $2 bucks why not here is a link they have one that you can just snap on the outside of the cable.
Some cable also is shielded also so might not need it but here is the link in case

http://www.allelectronics.com/make-a-store/category/235/Ferrites/1.html

MonMotha:

In general, ferrites are not required for proper operation, though they can improve noise performance in analog circuits (analog joysticks, audio, video, etc).   Ferrites are most often installed to meet FCC regulations regarding stray electromagnetic (radio) emissions.  You can usually remove them if you want, but if other stuff in your house (or your neighbor's) starts acting funny, you'd best put them back on.

dirkomatic:

As inexpensive as they are, I'll just get a couple of them from digikey when I make my order.  Thanks for all the information guys!

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