Re: Motor and limit switches.
From: Terry Pinnell (terrypinDELETE_at_THESEdial.pipex.com)
Date: 11/02/04
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Date: Tue, 02 Nov 2004 13:30:46 +0000
"John Schiavone Jr" <jsjr@epix.net> wrote:
>An easy question for all of you out there.
>
>For next Halloween, my wife wanted to hang a ghost from the porch. She
>would like it hooked to a motor and some limit switches. The ghost would
>come down to the trick-or-treater hit a limit switch and then reverse
>itself. What is th esimpliest/easiest way to do this. I don't have much
>experience with this. Thanks.
>
> John
Here's a circuit, with full notes.
http://www.terrypin.dial.pipex.com/Images/AutoMotorExtremes.gif
It was originally used in my Window Opener many years ago, but has
various applications. You haven't said, but I assume you want the
ghost to operate once (down and up) at the flick of a switch, rather
than constantly. But in either case it should be relatively easy to
adapt from the circuit shown. Note that at its simplest it uses just a
SPDT relay (of appropriate voltage and current rating), two normally
closed microswitches, and an operating switch. For longer lengths of
lightweight wiring you might prefer to add a transistor trigger
circuit, as shown. (In my case that went from a bedside switch to the
heavy motor unit near the window.) Or, in some cases, you might want
to trigger the effect electronically (e.g. by sound, light, a door
opening, etc.)
P.S "For next Halloween, my wife wanted..."
^^^^^^
Why the past tense? Was that just one request too many? <g>
-- Terry Pinnell Hobbyist, West Sussex, UK
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