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From: John Fields
Organization: Austin Instruments,Inc.
X-Mailer: Mozilla 4.01 [en] (Win95; U)
Subject: Re: Reed Switch "dead spot".
NNTP-Posting-Date: Tue, 03 Sep 2002 07:42:13 CDT
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Date: Tue, 03 Sep 2002 12:42:13 GMT
Travers Waker wrote:
> A while ago I posted my initail ideas for my first electronics project -
> building a sensory chess board that sends the moves made by the pieces to
> the PC via RS232. I planned on using reed switches placed under each square
> and a magnet in the base of each piece to detect the pieces position.
> Thanks very much for any helful advice/ideas/explanations.
Why not use an array of LDR's (photocells)?
Since you'll be playing with the lights on you'll get _some_
illumination wherever the pieces aren't and you should be able to get a
pretty good on-off ratio since it's going to be very dark under the
Professional circuit designer
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