Subject:
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Re: Sensor ideas
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 30 Dec 1998 19:39:05 GMT
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Original-From:
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stephen p spackman <stephen@acm.org%avoidspam%>
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Viewed:
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3769 times
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Ben Kimball wrote:
> Suspend a disc on a horizontal axis after drilling small, regularly
> spaced holes near its edge. (A template for this sort of disc can be
> found in Gordon McComb's "The Robot Builder's Bonanza"; you might also
> try cutting out the bottom of a colander.) Sandwich it between the light
> sensor and a light source. At one point along its edge, in a place where
> it won't impede the rotation of the disc through the sensor "sandwich",
> attach a small weight. Then, program your RCX to count the number of
> times the light sensor cycles. The current count tells you the angle of
> inclination or declination.
>
> Oops.
>
> I don't know how to determine which direction the wheel is traveling,
> which is necessary so that you know whether to increment or decrement
> your counter when the light sensor cycles.
>
> Any ideas?
You need at least three "shades" rather than just black and white - cf
the rotation encoder.
Actually the device you describe is basically a rotation encoder with an
arm and a weight!
stephen
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
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Message is in Reply To:
 | | RE: Sensor ideas
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| (...) I'm not sure if this is workable, since I haven't done too much RCX programming, but what about something like the following, which only requires one light sensor: Suspend a disc on a horizontal axis after drilling small, regularly spaced (...) (28 years ago, 28-Dec-98, to lugnet.robotics)
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