Subject:
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Re: Stupid multiple sonars...
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Tue, 9 Feb 1999 14:09:42 GMT
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Original-From:
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Darkman <lroska@cyberus.ca=StopSpam=>
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Viewed:
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948 times
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a small signal diode like 1N914 should do.
-----Original Message-----
From: Ian Hojnicki <damasta@camelot.bradley.edu>
To: handyboard@media.mit.edu <handyboard@media.mit.edu>
Date: Tuesday, February 09, 1999 12:16 AM
Subject: Stupid multiple sonars...
> I guess I have a really simple question to ask... I know that I can
> share many of the lines off of the SPI in order to hook up two polaroid
> sensors... However, is it really necessary to add a diode to each of the
> ECHO lines? If so, what are the specs for those diodes? I am basing the
> fact that I can use D3 for the additional INIT line for the second
> sonar. IS THIS CORRECT? I would not like to just chuck and jive with
> this, it is of course university property. I would like the reply to go
> to my account directly cause I don't know when Fred will get me added to
> the mailing list... Thanks
>
>
> Ian
>
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Message has 1 Reply:
 | | Re: Stupid multiple sonars...
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| (...) It is correct that you can use the remaining SPI pins as digital outs to trigger a second sonar. I've done it and it works fine. It's also true that there *is* signal contention on the echo lines if you simply plug 'em both into the same TIC (...) (26 years ago, 10-Feb-99, to lugnet.robotics.handyboard)
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