Subject:
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Re: Shaft Encoders
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Fri, 16 Jan 1998 15:59:55 GMT
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Original-From:
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Marie Cahill <mchu4mc1@fs&ihatespam&2.ee.umist.ac.uk>
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Viewed:
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5335 times
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> Date: Mon, 12 Jan 1998 13:19:12 +0100
> From: Thomas Hauri <har@twi.ch>
> Organization: Technikum Winterthur Ingenieurschule
> To: handyboard@media.mit.edu Subject:
> Re: Shaft encoder
> Hi
>
> Stefano Nardone wrote:
>
> > I need some docs on interfacing/reading a quadrature
> > shaft encoder to a 68hc11... someone can give me
> > some hint?
>
>
> You could use spezial interface chips to solve your
> problem. Hewlett
> Packard has some chips (HCTL2016, HCTL2020) which are
> easy to use and offer a lot of features.
>
> I have used the HCTL2020 with the handyboard. If you
> want to interface the shaft encoder without special
> chip you need to measure the pulsewidth of the signal
> from the encoder aswell as a direction bit which you
> can generate with a simple and-gate. I have written a
> couple of programs (asm) to measure frequencies and
> pulsewidth with the Input Counter of the hc11. Tell if
> you need them.
>
> bye
>
> Tom
Hi there,
Would these chips be suitable for interfacing a mouse to
the Handyboard? My robot incorporates a mouse as a
castor wheel and I want to use its shaft encoders as
position/velocity sensors (relative) for the robot, but
I don't know where to look for details on how the
signals are generated and transmitted for a mouse. Do
you have any suggestions?
Marie
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