Subject:
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Re: Sonar and the expansion board.
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Sat, 20 Jan 2001 20:04:57 GMT
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Viewed:
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990 times
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Hi, Try some of these techniques from the sites list here and see what you
get. If you still get the errors in readings then you should assume that there
is a problem with the board. Fortunately all chips on the board are replaceable
and there is a test code to help determin what is at fault.
http://www.cs.umd.edu/users/musliner/sonar/list
http://www.verinet.com/~dlc/sonar/dlcsonar.html
I also see that in the handyboard diagram they are suggesting to use a 0.1uF
polorized electrolitic cap rather than a non-polorized tantulum. try that too.
-Dan
In lugnet.robotics.handyboard, Nick Golder writes:
> I am having quite a problem with getting the proper readings from the
> sonar. Here is a little background on what I have tried. I have a total
> of four driver boards and four sonar modules. I have soldered on the
> non-polarized tantalum 0.1uF capacitors in the C7 slot on the boards
> already. Things get hairy when I load the sonar.c code and run
> sonar_display() which seems to display random variables from a range of
> around -28000 through 35000. I have tested each board and the same
> results. The sonar driver board connects to the handy board via the
> expansion board through a foil ribbon cable. Is there any thing on the
> expansion board or the handy board that could have failed and how could I
> test it? Both of these items I have acquired used. Any help would be
> appreciated. As you have expect, this is becoming quite frustrating.
> Thanks in advance,
>
> "Breaking stereotypes since 1977."
> Nicholas Golder
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Message is in Reply To:
 | | Sonar and the expansion board.
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| I am having quite a problem with getting the proper readings from the sonar. Here is a little background on what I have tried. I have a total of four driver boards and four sonar modules. I have soldered on the non-polarized tantalum 0.1uF (...) (24 years ago, 20-Jan-01, to lugnet.robotics.handyboard)
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