Subject:
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Re: Sonar question
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Sat, 24 Oct 1998 18:13:55 GMT
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Original-From:
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Will <willbain@cs.=stopspammers=umt.edu>
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Reply-To:
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nepenthe@ANTISPAMmontana.com
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Viewed:
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1345 times
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Eric Noyau wrote:
<snip>
> I'd like to use 2 sonars, not just one, to give my robot a more stereoscopic view of the world. • <snip>
> There is 5 things necessary to connect a sonar board with the HB: • <snip>
> The only one that cannot be shared is the INIT line, connected to the port D5.
> Can I connect my second board INIT to D3 for this purpose?
<snip>
I asked about this a few months back, and Fred Martin himself suggested
I might try the very same connection scheme that you mention. Here's
what he suggested:
<snip>
> you might be able to get away with some signal multiplexing, assuming
> you're only firing one sonar at a time. i could see the BINH being no
> problem. For sharing the ECHO, make sure the polaroid outputs are
> open collector so there isn't signal contention.
>
> Fred
According to Darkman's message of 4/21/98, the ECHO is indeed open
collector, so it ought to work fine. I'll give it a try (using D2 for
the second INIT instead of D3), and report on the results of the smoke
test.
--Will
, ,
__@_/ \_@__ |/
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)\ ) ( \ (\/\\,
~~~~~~~~~ ' ` ~~~~~~~~~~~ ` ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Wendy Parson, There's no underestimating
Will Bain, the intelligence of the American public.
& Tatoosh --H. L. Mencken
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Message is in Reply To:
 | | Sonar question
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| Hi all, I'd like to install sonar capabilities in my robot and I went to the FAQ to check how it was "recommended" to do it with the Polaroid OEM kit (It's at (URL) this seems pretty straightforward to do but I'd like to use 2 sonars, not just one, (...) (26 years ago, 24-Oct-98, to lugnet.robotics.handyboard)
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