Subject:
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Re: Another DIY sensor
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Newsgroups:
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lugnet.robotics
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Date:
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Sun, 19 Nov 2000 18:30:25 GMT
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Original-From:
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Martin <martin@mediaxNOMORESPAM.com>
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Reply-To:
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martin@mediax.com&NoSpam&
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Viewed:
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949 times
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Martin wrote:
> John Barnes wrote:
>
> > That reminds me. A while ago now, someone here suggested trying
> > out the guts of one of those ball-less optical mice as the basis for
> > a sensor to watch the floor go by under the robot. Did that get
> > anywhere? Does anyone even know how those things work? Are
> > they still $50?
>
>
> Those cameras have a small, low-resolution CCD in them, and they take
> snapshots of the mousing surface and compare them to detect the
> quantity of motion.
>
> If you were going to use one of those mice your best bet would be to
> put together a sensor interface using a PIC chip to simply interface
> with PS/2. Then you could also get some touch sensors out of it (IE,
> the mouse buttons.) But the electronics on the inside are unlikely to
> give you pulses back out, except in the form of serial port data (IE,
> PS/2, which is more or less an RS-232 port at 5 volts rather than
> +12/-12.)
Oh, and I forgot to mention, you won't get rotation out of a PS/2
interface. It does (primarily) +x, +y, and however many button events.
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Message is in Reply To:
 | | Re: Another DIY sensor
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| (...) Those cameras have a small, low-resolution CCD in them, and they take snapshots of the mousing surface and compare them to detect the quantity of motion. If you were going to use one of those mice your best bet would be to put together a (...) (24 years ago, 16-Nov-00, to lugnet.robotics)
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