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Subject: 
RE: Handyboard Expansion Sonar Issues
Newsgroups: 
lugnet.robotics.handyboard
Date: 
Thu, 4 Feb 1999 19:03:48 GMT
Original-From: 
Stephen Michael <SA_MICHAEL@stopspammersHOTMAIL.COM>
Viewed: 
964 times
  
To anyone who can help:

I too have contructed the HB expansion board.  All i/o
ports appear to work.  The servo controllers appear to
work well also.  However, like Ranjit, I'm having Polaroid
Sonar problems.  I got this as a kit from Wirtz Electronics.
When activated, it appears to function (it repeatedly clicks
when "sonar_display()" is executed), but returns apparently
random readings.

Does anyone have any suggestions as to what might be wrong?

Stephen Michael
sa_michael@hotmail.com


I assembled the expansion board and tested all I/O ports.
Everything checks out fine. I have the 6500 sonar module with
the flex cable. After loading 'sonar.c', I tried the
'sonar_display()' function. The transducer came to life with
its 'clicking', but the LCD displayed a very rapidly fluctuating
4 digit random number between 1100-1700. Aiming the transducer
in various positions has no effect on the numbers.

Any suggestions will be appreciated,
Ranjit

--
Ranjit Diol - COMPSys
Dowagiac,Michigan



Message has 2 Replies:
  Re: Handyboard Expansion Sonar Issues
 
did you put the capacitor c7 (0.1uf) in the sonar board, as indicated in the directions? if not, plesae do so and let me know if this solves your problem. fred In your message you said: (...) (26 years ago, 4-Feb-99, to lugnet.robotics.handyboard)
  Re: Handyboard Expansion Sonar Issues
 
There is a very high probability that you plugged the foil cable in backwards. Doing so, even for a moment, will destroy the IC chips. It will still click (I haven't figured that one out yet), but the IC chips and possibly even the electrolytic (...) (26 years ago, 5-Feb-99, to lugnet.robotics.handyboard)

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