Subject:
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Re: Design wanted: Touch sensor for passing trains
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Newsgroups:
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lugnet.robotics, lugnet.trains
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Date:
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Wed, 29 Dec 1999 18:20:23 GMT
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Viewed:
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705 times
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In lugnet.robotics, James Powell writes:
> In lugnet.robotics, Carl M. Kadie writes:
> > I'm using Mindstorms to control Lego trains.
> >
> > Does anyone have a design for using a touch sensor to detect a train
> > passing?
> >
> > My intuition is that the touch sensor could be more reliable than the light
> > sensor (plus I have two touch sensors and only one light sensor).
>
>
> My suggestion:
> Touch:
> Have the track elevated, and free to move up and down (1 'hinged' joint).
> Then have your touch sensor below the track.
This would be my suggestion as well, if you want to use a touch sensor. If I
recall correctly, they should be robust enough that the weight of the track
won't set them off, but the weight of a passing train will. The only thing
I'd worry about is wether the sensor would reset after the train went by (i.e.
will the sensor spring back with the track weight on it.)
James
http://www.shades-of-night.com/lego/
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