Subject:
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Re: Sonar and the handyboard
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Fri, 21 Mar 1997 17:56:16 GMT
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Original-From:
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Adam <[adam@]ihatespam[ring.zenox.com]>
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Viewed:
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1730 times
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Ahh...
This sounds right from when I had the same problem. I just
forgot about the disconnecting of the BINH. Mainly because
it was accidental at the time. Anyways, the point I wish to
make is that you have a bad ranging unit. This symptom is
exactly the reason I returned 3 of the 4 boards. All of my
boards are working now. I'm curious about what the problem
is. I suspect that the socketed chip is to blame. Afterall
I remember checking the schematic and seeing that BINH is a
functional of the socketed chip. I bet if you replace this
chip you'll be OK. Afterall, 23" sucks for close encouters, eh?
Now, I may even know where to start looking for the chip.
I can't recall (I'm at work now) what the chip is called,
although it is covered on my board with a label. But, I bet
that it relates back to a schematic on the sonar tranciever
circuit found in Motorola's "Special Purpose Linear Devices"
data book. Check out this book and you may find the chip.
Let me know how it is going as I have been extensively working
on the integration of these devices to my Robot. Thanks
Hope this helps
----------------------------------------------------------
Adam B. Cox check out my web page
Computer Engineer http://www.zenox.com/~adam
Zenox Communications Corp. vmail: 416-241-7000 (x224)
----------------------------------------------------------
On Fri, 21 Mar 1997, Tom Brusehaver wrote:
>
> Thanks, I followed Chuck M's advice, and disconnected the BINH, and
> the thing words, with 23" as the minimum distance.
>
> > ...
> > socketed chip on the PCB. I would suspect that this chip
> > is suspect to failure.
>
> I would have to possibly agree. I noticed in your earlier mail you
> have suggested putting a 330 ohm resistor between INIT and the handy
> board, but not between BINH. I found nothing in the docs that would
> suggest that this was a good idea, or required. Might it be a good
> idea to put one on BINH also?
>
> > Anyways, in order to solve your problem, I would suggest
> > ...
> > It's a tough to correspond with you on this kind of problem
> > through email. The sonar system is complex in its operation.
>
> I'd have to agree.
>
> > You might want to get a hold of Polaroid and ask for some
> > assistance from an Applications Engineer. These guy are good
> > with these kinds of problems.
>
> That might be a good idea, do you know if the chips can be purchased
> separatly ?
>
> Thanks
>
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Message is in Reply To:
 | | Re: Sonar and the handyboard
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| Thanks, I followed Chuck M's advice, and disconnected the BINH, and the thing words, with 23" as the minimum distance. (...) I would have to possibly agree. I noticed in your earlier mail you have suggested putting a 330 ohm resistor between INIT (...) (28 years ago, 21-Mar-97, to lugnet.robotics.handyboard)
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