[PLUG-TALK] magnets from hard drives

[Pete Lancashire]

Try a 5-1/4 drive made from about 2005.



On Thu, Jul 23, 2015 at 4:13 PM, Keith Lofstrom <keithl at gate.kl-ic.com>
wrote:

> The head-deflection linear actuator in a hard drive has
> a coil running between two powerful magnets.  Needing two
> magnets for a project (actuating two door-closing sensors),
> I took an old 10 GB hard drive apart and unscrewed the
> magnets, and used the same mounting holes to attach them
> to the door jams.
>
> Then polished the drive platters with a bit of emery paper.
> The old bits take up less room if they are scraped off the
> platters. :-)
>
> Before tossing those ancient hard drives, pull the magnets
> for future projects.  They are is refrigerator magnets, if
> you have a refrigerator you want to mount on a steel wall. :-)
>
> Keith
>
> P.S.  I have not taken apart any 2 inch drives, or much
> newer drives - those may be constructed differently.
>
> --
> Keith Lofstrom          keithl at keithl.com
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