Subject:
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RE: Rotation Sensors - slightly disappointed...
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Newsgroups:
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lugnet.robotics
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Date:
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Tue, 29 Feb 2000 12:01:20 GMT
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Original-From:
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eMKa <koster@=Spamcake=casema.net>
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Viewed:
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1229 times
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Mmmm, your triggering some thoughts.
A mouse is a pretty simple (serial) device
Imagine having a robot which has a mouse-ball in a DUPLO block carried over
the surface
In this way you could record the path the robot has taken. Doing a bit of
programming, the robot can learn how his environment is set-up ...
> -----Original Message-----
> From: Robb Greathouse [mailto:rob@opengrid.net]
> Sent: 28 February 2000 20:55
> To: Ben Jackson; lego-robotics@crynwr.com
> Subject: Re: Rotation Sensors - slightly dissapointed...
>
>
> I've used old mouse rotation sensors in non-lego projects with
> some success.
> They employ a laser counter. The device can be easily connected
> to a basic
> stamp. If the counter disk is sealed against contaminantion it
> works well.
>
> Robb,
> ----- Original Message -----
> From: Ben Jackson <ben@ben.com>
> To: <lego-robotics@crynwr.com>
> Sent: Friday, February 25, 2000 10:28 AM
> Subject: Re: Rotation Sensors - slightly dissapointed...
>
>
> > In lugnet.robotics, Michael Gasperi writes:
> > > In lugnet.robotics, Iain Hendry writes:
> > > > The program ran successfully for about 20 seconds before I
> noticed motor
> 1
> > > > had shifted out of phase by 22.5 degrees - it had slipped/skipped a • count.
> > >
> > > Because the LEGO Rotation sensor is a powered type, it might • be slightly
> > > sensitive to battery voltage.
> >
> > If you check the legOS group you can see my posts with some extensive • analysis
> > of the sensor values for the rotation sensor. There is a patch to make • legOS
> > less sensitive to voltage fluctuations and one to debounce the input • (which is
> > what probably causes missed counts on the standard firmware as well). I • was
> > working on very similar designs to those being discussed in this thread, • and
> > with my changes (using legOS, of course) you get the expected behavior, • with no
> > missed (or extra) counts.
> >
> > I doubt you can get very high precision from the stock firmware.
> >
> > --Ben
>
>
>
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Message is in Reply To:
 | | Re: Rotation Sensors - slightly dissapointed...
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| I've used old mouse rotation sensors in non-lego projects with some success. They employ a laser counter. The device can be easily connected to a basic stamp. If the counter disk is sealed against contaminantion it works well. Robb, ----- Original (...) (25 years ago, 28-Feb-00, to lugnet.robotics)
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