On Mon, Jun 19, 2000 at 12:28:39PM +0100, John P. Looney (Kate) wrote:
> > after purchasing a wet/dry electric shaver that recharges with no
> > metal contacts i had to refuse a female coworker's request to take
> > it apart to see how it worked.
>> I can see her point. I've a toothbrush that works on similar principals.
> I tryed to take it apart, but it's glued shut.
Just to take Kate, Kevin and his unnamed female co-worker out of their agony
these "no metal contacts" charging devices are charged by inductive
coupling, whereby a current flowing in one wire will induce a current to
flow in another wire laid alongside it (there are magnetic fields involved, but
we're sticking to a nice simple explanation). Intervening plastic is not
problem (as long as there's not too much of it). This is the same principle
involved when you hack your cable TV service whilst not being a subscriber
by running a wire in your attic parallel to the wire outside belonging to
Cablelink. Of course the brute force and ignorance approach of simply
tapping into their cable is simpler, but that's illegal :-)
Regards,
Niall
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