Subject:
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"cat whisker" trip switch
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Newsgroups:
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lugnet.trains
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Date:
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Sun, 17 Oct 1999 03:33:25 GMT
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Viewed:
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761 times
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Hi All,
I was playing around with Mindstorms tonight and was working on the
automated trolley line. I have been looking for alternatives to the light
sensors (the ambient light can kill ya). I was thinking about touch sensors
but just plopping a touch sensor at the end of the line is a real mess if
the train has any speed, either you knock the sensor right off the tracks or
the trolley looses it's front end! So I tried a "cat whisker". Basically it
have a "+" beam attached at a pivot point held loosely against a touch
sensor with a rubber band (LEGO brand of course). When the train comes by it
pushes the "+" beam out of the way of the trolley thus releasing the
sensor's switch. The rest is a simple mater of programming.
SteveB
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Message has 2 Replies:
 | | Re: "cat whisker" trip switch
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| (...) Before I add my 2 cents worth, I have zero experience with Mindstorms light sensors. That said, have you tried shading the sensor, especially from overhead light. Are Mindstorms light sensors similiar to those used in other forms of model (...) (25 years ago, 17-Oct-99, to lugnet.trains)
| | | Re: "cat whisker" trip switch
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| Steve, I have also used Mindstorms to run a train, like this. But I used it in a railroad yard, not for a trolley. But it’s basically the same concept. I put the touch sensor at a 90 degree angel with the track and about one brick away from track at (...) (25 years ago, 18-Oct-99, to lugnet.trains)
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