Subject:
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Re: Compass/directional sensor
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Newsgroups:
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lugnet.robotics
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Date:
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Mon, 14 Dec 1998 07:10:23 GMT
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Original-From:
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Peter Hesketh <pbh@phesk./nospam/demon.co.uk>
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Viewed:
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1321 times
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In article <002101be26fe$548a96f0$2b00c8c0@tim.ams.co.nz>, Tim McSweeney
<tim@ams.co.nz> writes
> You could mount a printed disk on a comapss needle and use some sort of
> encoding via the light sensor to determine your direction.
>
> By changing the shade from white to black you'd probably be able to get a
> decent angle reading. The only tricky bit is what happens at the
> black-white meeting, If the light sensor detects this as a mid-gray you'd be
> out be 180deg.
If you could find a code which only changes by one bit at any transition
you would be OK. I know that the Gray Scale does this for linear
measurement, but is there a Gray Scale which wraps around between 359
and 000 degrees with a single but change? That would work.
--
Regards - Peter Hesketh, Mynyddbach, Mon.
Forty reasons why a dog is better than a woman: number 12
"Dogs love red meat."
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Message has 1 Reply:
 | | RE: Compass/directional sensor
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| (...) I'm sure there are gray codes that do this but from mewmory gray codes are used to encode rotation as a binary number and we only have the one light sensor. Tim (26 years ago, 14-Dec-98, to lugnet.robotics)
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Message is in Reply To:
| | RE: Compass/directional sensor
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| You could mount a printed disk on a comapss needle and use some sort of encoding via the light sensor to determine your direction. By changing the shade from white to black you'd probably be able to get a decent angle reading. The only tricky bit is (...) (26 years ago, 14-Dec-98, to lugnet.robotics)
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