Subject:
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Re: Help!! Polaroid problem!!!
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Wed, 22 Apr 1998 17:23:12 GMT
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Original-From:
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MAR ERICSON <mar@NOMORESPAMcooper.edu>
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Viewed:
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577 times
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When it first worked for me, I used the HB NiCd. I grounded binh and it
worked. I used binh to measure like 7 inches and it worked fine too.
-----------
ericson mar
Master of Engineering Candidate
Project: Mobile Robotics
mar@cooper.edu
(212)353-4356
Department of Mechanical Engineering
The Cooper Union for the Advancement of Science and Art
-------------------------------------------------------
On Wed, 22 Apr 1998, Thomas Hauri wrote:
> well....I might be the way you are powering the sensors ???
> Maybe luck ????
>
> :))))))
>
> Actually I don't why you don't need any of those supporting parts.
> A short question ...For what range are you using the sensors (are you using the
> binh signal) ??
>
> We never had any problems using the sensors with a range above 40 cm. But as soon
> as we tried to measure down
> to 15 cm (using binh) we had false echo signals.
> One strange thing to this story...about 15 month ago, when I first built an
> interface to those sensors they worked just fine. Then suddenly after rebuilding
> the interface (using bigger caps and a interfaceboard instead of a breadboard)
> they didn't work anymore....I don't know anymore wether I also changed the
> sensorboards or not.
> So I ended up with the problem not to be able to use the sensors with binh.
>
> After adding the caps as discribed in an earlier mail they just worked fine.
> So if anyone can track those problems down to one cause please let mie know....
>
> Thanks
>
> Tom
>
>
>
> > Why does it seem like everyone except me needs a pullup resistor and
> > perhaps a capacitor somewhere to operate the Polaroid? I've never had any
> > problems without any of these components. ???
> >
> > The first time I connected the sensor, it worked perfectly.
> > Maybe I my Handy Board happens to have better components? :-/
> >
> > -----------
> > ericson mar
> > Master of Engineering Candidate
> > Project: Mobile Robotics
> > mar@cooper.edu
> > (212)353-4356
> >
> > Department of Mechanical Engineering
> > The Cooper Union for the Advancement of Science and Art
> > -------------------------------------------------------
>
>
>
>
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Message is in Reply To:
 | | Re: Help!! Polaroid problem!!!
|
| well....I might be the way you are powering the sensors ??? Maybe luck ???? :)))))) Actually I don't why you don't need any of those supporting parts. A short question ...For what range are you using the sensors (are you using the binh signal) ?? We (...) (27 years ago, 22-Apr-98, to lugnet.robotics.handyboard)
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