Subject:
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Re:
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Sun, 21 Feb 1999 20:12:22 GMT
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Original-From:
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Nick Taylor <ntaylor@iname.com>
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Viewed:
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1303 times
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Will - -
I'm also working on implementing multiple sonar sensors on the
HandyBoard.
My intention is to mount 4 transducers using Adam Cox's multiplexor. At
present I'm struggling with the software attempting to reduce false
readings
and increase reliability. As a newbie I'm forced to rely heavily on the
work of others (use one person's idea and it is plagiarism, use several
persons' ideas and it is research) to lead me toward understanding.
Most
of what I've found is so basic as to be useless ... with one notable
exception: UM_MCIB.pdf at ftp://ftp.eecs.umich.edu/people/johannb/
This paper by Johann Borenstein is excellent, but at present most of it
is going over my head.
If you have any source code (or other ideas) to share, please post
them.
They will certainly help me, and will most likely help many others as
well.
- - - Nick - - -
Will Bain wrote:
<snip>
> It seems that, instead of using four digital outputs to drive four
> transducers, the circuit could be modified (using inverters) to use only
> two digital outputs. Likewise, three digital outs ought to be able to
> switch up to eight transducers, and four ought to handle sixteen
> tranducers, but I haven't worked out the details. In any case, it's
> very important that one and only one transducer is switched into the
> circuit at a given moment. Best of luck to you!
>
> -- Will
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Message is in Reply To:
 | | Re:
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| (...) I'm still working out the best way to connect two sonar modules to the HB (using two complete module board/transducer sets). Both modules ping, but I'm getting signal contention with both echo lines connected to the same TIC port. Probably the (...) (26 years ago, 21-Feb-99, to lugnet.robotics.handyboard)
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