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RE: Idea for Poll
- To: <ukha_d@xxxxxxx>
- Subject: RE: Idea for Poll
- From: "Keith Doxey" <keith.doxey@xxxxxxx>
- Date: Tue, 26 Sep 2000 11:12:04 +0100
- Delivered-to: rich@xxxxxxx
- Delivered-to: mailing list ukha_d@xxxxxxx
- Mailing-list: list ukha_d@xxxxxxx; contact
ukha_d-owner@xxxxxxx
- Reply-to: ukha_d@xxxxxxx
Hi Nigel,
You just reminded me of something I did when I was about 13.
It was for the youthclub fete. I decided to build one of those
"Negotiate
the bendy wire without touching it" thingies. A couple of old wire
coathangers, 12V car battery and a VERY large DC bell. It functioned
extremely well and there was no chance of not hearing the bell......it was
loud. Even louder was the shreik from me after the contact was
broken....the
back EMF from the large bell coils made me jump so much it made contact
again....repeat....
Needless to say that by the time it got to the fete, the bell had been
replaced by a 12 volt bulb :-)
Keith
> >"What have you been electrocuted by?"
>
> Oh, and can we add 'first attempts to make a relay-based oscillator'
(For
> the uninitiated, if you wire up a relay so that the normally
> closed contact
> is in series with the coil, it tends to oscillate, producing a
suitably
> large 'kick' each time the coil is disconnected.)
>
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