Subject:
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Re: (long) Rotation Sensor from "Extreme Creatures" Fiber Optics
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Newsgroups:
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lugnet.robotics
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Date:
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Tue, 29 Dec 1998 13:42:36 GMT
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Viewed:
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1306 times
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Great!!!!!!!!!!!!
It works.
Now I have two angle sensors (8456 & 8480) :-)))))))))))))))))))))
BTW, this is how it works:
The led inside is *ON* only when it is under one of the eight holes.
It has a (presumably 10K, since I read 523 in raw mode) current-limiting
resistor.
So the light/fiber gizmo is equivalent to a touch-sensor that is activated
eight time per rotation (the resistance of the forward-biased led is very
low).
Obviously, it works even if the input is set in "switch mode", the led will
glow lightly (the pull-up current is small). Alas, it seems to me that the
sampling is more accurate.
Thanks for your discovery!
Carlo
lego-robotics@crynwr.com (Daniel Walton) writes:
> > Several list members have asked for instructions on making a simple
> > rotation sensor using the standard Mindstorms light sensor coupled to the
> > light / fiber optic gizmo that comes in the "Extreme Creatures" add-on set.
>
>
> I might not have read your goal right. I might be missing somthing. I was
> able to connect the light/fiber gizmo up to the input port. Every time the
> axel spun 1/8 of a turn i would recieve a 79 value. The light would light
> and it works great. I am able to sense 1/8ths of a turn without a light
> sensor and using just one input port.
>
> is this already well known?
> Dan
>
>
> --
> Did you check the web site first?: http://www.crynwr.com/lego-robotics
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