Subject:
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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 13:26:45 GMT
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Viewed:
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968 times
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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 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 has 2 Replies:
 | | Re: Sonar and the expansion board.
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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 (...) (24 years ago, 20-Jan-01, to lugnet.robotics.handyboard)
| | | Re: Sonar and the expansion board.
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| Nick.. I have exactly the same problem.. I couldn't even get the 'clicking' to start with and the chips on the sonar board got a little warm. I then have fitted the diodes in series with the power to the sonar board (connector pin 9) and added a 1K (...) (24 years ago, 11-Feb-01, to lugnet.robotics.handyboard)
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