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 14:09:46 GMT
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Viewed:
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38 times
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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).
>
> Thanks much for any help,
>
> Carl Kadie
Hi Carl,
I tried some time ago, way before the mindstorms, to use read contacts. The
magnets of the wagon/engines will close the contact each time they pass.
I guess that the RCX can see this as 0 and 1. With this you can, I imagine,
count the length of your train. This allows you to take different action
for different trains.
Hope it works,
Guido
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