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

[Sarah Nordstrom]

It's for EMI/noise reduction/prevention.
http://en.wikipedia.org/wiki/Ferrite_bead
 -sen


On Wed, June 6, 2012 14:02, Joseph Brenner 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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