Subject:
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Re: My "new" rotation sensor
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Newsgroups:
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lugnet.robotics
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Date:
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Thu, 1 Jul 1999 12:53:15 GMT
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Viewed:
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1324 times
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Jon Shemitz <jon@midnightbeach.com> wrote in message
news:3779A506.A84A9221@midnightbeach.com...
> Is this "fiber-optic lights unit" the same as the rotation
> sensor that's now on the Mindstorms page?
No. LEGO makes a real rotation sensor that is well worth the $15 from World
Shop. The fiber-optic thing is really a fancy decoration part than can be
used to kinda measure shaft movement. There was a time when the LEGO
rotation sensor was hard to get and people were trying anything to
substitute for it.
> Has anyone tried turning the light sensor into a rotation sensor by
> building a shaft encoder? Face the light sensor into a 'tunnel' and put
> a (four bladed?) 'fan' in front of the other tunnel opening. You'd get a
> pulse off the light sensor every quarter turn.
If your trying to make it look like a real LEGO rotation sensor, you can't
get the LEGO light sensor to produce the clean and sharp voltage changes you
need to make the RCX think it has a rotation sensor hooked up. Also you
can't get the LEGO light sensor to produce one of the rotation sensor's
output voltages. If all you want to do is detect movement by counting the
pulses the 'fan' would make, it should work. I've seen where people just
use touch switches for this.
Mike Gasperi
More sensor information at:
http://www.plazaearth.com/usr/gasperi/lego.htm
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Message is in Reply To:
 | | Re: My "new" rotation sensor
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| (...) Newbie here. Is this "fiber-optic lights unit" the same as the rotation sensor that's now on the Mindstorms page? Has anyone tried turning the light sensor into a rotation sensor by building a shaft encoder? Face the light sensor into a (...) (25 years ago, 30-Jun-99, to lugnet.robotics)
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