Subject:
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Re: "Glass switch" for dept store window train display
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Newsgroups:
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lugnet.trains
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Date:
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Thu, 5 Oct 2000 18:39:01 GMT
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Viewed:
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432 times
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On Wed, 4 Oct 2000 21:55:46, "Dan Parker" <dnvpark@gte.net> wrote:
> A more primitive approach is a crude foil capacity plate stuck to the inside
> of the glass, thus requiring I complete a circuit-system.
Or use a fancy capacitive plate: cut the foil into the shape of,
say, a hand or a Christmas tree.
> Not sure how
> reliable this is.
It may take a little tweaking to get the size of the antenna right,
but it should be pretty solid once you do. Make sure you test with
several people: there's a lot of variation in body capacitance, so
the sensitivity of the switch varies from person to person.
You can get everything you need to experiment (including some
"mini-notebooks" with sample
circuits) for under $20 from your local Radio Schlock.
Ditto for light sensors, but the RCX approach Oliver suggested might
be more appealing.
Ran
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Message is in Reply To:
 | | "Glass switch" for dept store window train display
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| I landed a contract to build a holiday-themed train display for a local department store. Woo-hoo! [sound both the train and I are making] What I'm looking for is an activation switch such that, when mounted on the __inside__ of the glass window, (...) (24 years ago, 4-Oct-00, to lugnet.trains)
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