Subject:
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Re: One tip, and a few questions.
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Newsgroups:
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lugnet.robotics
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Date:
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Sat, 21 Nov 1998 06:01:16 GMT
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Original-From:
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Peter Hesketh <PBH@PHESK.DEMON.spamlessCO.UK>
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Viewed:
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3103 times
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In article <01BE14B1.B5C66E80.eric.hodges@platinum.com>, Eric Hodges
<eric.hodges@platinum.com> writes
> One uses a single
> light sensor. The bot swivels until the sensor value starts to decrease,
> then swivels back and goes forward until the light decreases by some fixed
> percentage. Then it starts swiveling again, but in the opposite direction.
> This is good for finding the boundary between light and darkness.
In the fifties I built a heat-seeking swivelling "eye" using that method
with valve (tube) technology. The IR detector was an old fashioned
glass envelope design which looked like a small light bulb. I painted
an eye on the front and mounted it on a motorised swivel base. It would
scan the room looking for warm objects and stare at them as they moved
around.
Unfortunately when I was working in the room it would become captivated
by the soldering iron and gaze at it lovingly, ignoring everyone else.
I also had to hide its own amplifier to rule out narcissism.
--
Regards - Peter Hesketh, Mynyddbach, Mon.
Forty reasons why a dog is better than a woman: number 7
"The later you get home, the _happier_ a dog is to see you."
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Message is in Reply To:
 | | RE: One tip, and a few questions.
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| The scale is from 0-100, where 0 is dark and 100 is light. Why does everyone want to use a laser pointer? This seems like the hard way to do things. I use a big Mag-Lite flash light. The beam is fairly directional, but large enough that the bot can (...) (28 years ago, 21-Nov-98, to lugnet.robotics)
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