[Noisebridge-discuss] thinksafe - a magnetic power connector for thinkpads

[Gopiballava Flaherty]

It's a ferrite bead that absorbs high frequency noise and, thus, reduces radio frequency interference.

http://en.wikipedia.org/wiki/Ferrite_bead

Thanks,

gopi at iPad

On Jun 6, 2012, at 12:02, Joseph Brenner <doom at kzsu.stanford.edu> wrote:

> On the same site:
> 
>  http://www.instructables.com/id/Fixing-a-Laptop-Charging-Cable/
> 
> There's a photo there of a repaired laptop power cable (lying on a
> table with some rather stylish soldering iron burns).
> 
> My question is what is the cylindrical widget to the left of the
> repaired connection?  These things are ubiquitous, and I've been
> wondering what they are.  I cut one open once and it appeared to be a
> dark ceramic cylinder with the cord running through it without any
> direct electrical connection.  It's some sort of surge protection, I
> would guess, but I have no idea how it works.
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