Re: For magnet lovers...
From: Ben Bradley (ben_nospam_bradley_at_mindspring.com)
Date: 06/26/04
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Date: Sat, 26 Jun 2004 17:56:26 -0400
sci.electronics.design,sci.electronics.components,rec.radio.amateur.homebrew,
"Greysky" <greyskynospam@sbcglobal.net> wrote:
>ever since I was a child, magnets have held a fascination for me. I've been
>collecting them ever since. It used to be that you could always scrounge
>loudspeakers for Alnico magnets. Then when the newer ceramic magnets began
>to be incorporated into loudspeakers, it became a challenge to remove them
>from their enclosures without breaking them. Now, I have to admit, I am
>having a ball collecting the new 'super magnets' - like the ones inside hard
>drives. There are also cool cylindrical magnets that you can get from inside
>the heads of VHS machines. My question is does anyone know of other sources
>either for Neodymium 'duper magnets', or strong ceramic magnets that I may
>be missing out on?
Like other posters, I've gotten some good ones out of some 5"
full-heght 30MB hard drives, and the ceramic donut magnets inside
microwave ovens. There are also some small, moderately strong
(apparently a step below Neodymium) magnets in many small
earphones/headphones (the kind for Walkman type portable stereos with
the 1/8" plug), that I've bought surplus for a dollar each. But some
of these have a little ceramic ring/donut magnet that's about next to
useless.
>Magnets like these come closest to being perpetual motion
>machines we have yet to make, and I'd hate to have some just wind up into
>the trash because I didn't know they were there :-)
There's this fun link that was posted a few months ago.
http://www.houseofscience.com/ouch/ouch.html
>Thanks.!
>
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