Subject:
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Re: Line Followers
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Newsgroups:
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lugnet.robotics
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Date:
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Tue, 16 Nov 1999 14:55:11 GMT
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Viewed:
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777 times
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Dave Baum wrote:
>
> You don't really need to shade the line. Start with something like a
> 3/4" wide black line over a white background. If the light sensor is over
> the edge between the line and the background it should read a value midway
> between "black" and "white".
You beat me to the punch, Dave. I was just about to say that, with the light
sensor correctly positioned, if it is just on the "edge" of a thick black line on
a white background, it sees gray (some black and some white). Given the width of
the line on the Lego "racetrack", it's not too hard to make the bot follow the
gray zone at the edge of the line and use increasing black/ increasing white as
turning cues. It's worth noting, though, that this is much less useful if you
have an arbitrary wiggly line, rather than the closed oval of the "racetrack".
Cheers
JP
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Message is in Reply To:
 | | Re: Line Followers
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| (...) You don't really need to shade the line. Start with something like a 3/4" wide black line over a white background. If the light sensor is over the edge between the line and the background it should read a value midway between "black" and (...) (25 years ago, 16-Nov-99, to lugnet.robotics)
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