Subject:
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Re: "cat whisker" trip switch
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Newsgroups:
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lugnet.trains
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Date:
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Mon, 18 Oct 1999 23:19:01 GMT
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Viewed:
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1235 times
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In lugnet.trains, Jim Rorstrom writes:
> ( I believe I read on Lugnet this weekend about Lego offering a laser light >emiter. If true it would be far superior to the bulb.)
To follow up on my laser comment (above). Josh Yeager in post #7294 (Robotics)
offers his own laser module for Mindstorms. He is asking $35.
- Jim
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Message is in Reply To:
 | | Re: "cat whisker" trip switch
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| (...) ower Steve, Steve, I poked around on the Web a little regarding model railroad sensors. Infrared sensors are generally placed between the rails facing up. They emit a constant infrared beam which is reflected back to the sensor when a train (...) (25 years ago, 18-Oct-99, to lugnet.trains)
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