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The wiring is very fragile.https://carnot.physics.buffalo.edu/mailman/listinfo/phys-l
Regards,
Jack
On Sun, 1 Jun 2008, John Denker wrote:
The local Walgreens stores are running a clearance onflashlights.
supercapacitor
This is the kind with an LED instead of a bulb, and a
instead of a battery. You charge it by shaking. Thechassis is
transparent, so you can see the coil and the magnet.light
I like them because
-- light weight ==> good for hiking
-- no battery ==> near infinite shelf life
-- LED won't burn out any time soon.
-- small amount of shaking makes rather long-lasting
-- physics lessonserious production
-- on sale for $2.00
On the other hand, it looks like they were having
problems. I had to sort through 12 of them to find 3that worked.
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Forum for Physics Educators
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--
"Trust me. I have a lot of experience at this."
General Custer's unremembered message to his men,
just before leading them into the Little Big Horn
Valley
_______________________________________________
Forum for Physics Educators
Phys-l@carnot.physics.buffalo.edu