Subject:
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Re: Sonar and RF Modem questions
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Wed, 17 Feb 1999 16:18:30 GMT
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Original-From:
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Nick Taylor <ntaylor@iname.com>
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Viewed:
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778 times
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doug@knowpeace.com wrote:
<snip>
> 1) Is everybody adding the 100uf 16 volt capacitor to prevent
> power dips (per http://www.robotics.com/arobot/sonar.html)?
I've heard that the 100uF cap isn't needed when using the HB's
standard battery source ... but since I was soldering on the
Polaroid board anyway, I decided that it wouldn't hurt to add
it. Do be *sure* to add the 0.1 uF cap at C7 as per:
http://el.www.media.mit.edu/projects/handy-board/software/sonar.html
<snip>
>
> 2) I like the "cap" around the transducer as illustrated in
> this picture of the "RadStamp"
Since most of my constructions are LEGO based, I attached my
transducer to a LEGO 40-tooth gear using a couple of dabs of
rubber cement.
<snip>
>
> 3) I also like how the RadStamp attaches the transducer to
> a stepper motor. Any recommendations on an appropriate
> motor for such an application, to be driven by the
> HB expansion servo control outputs?
I've got mine mounted on a servo on my BASIC Stamp test 'bot,
and intend keeping the same setup when it moves over to the
HandyBoard.
<snip>
>
> 4) I want to hook up RF transcievers to the handy board
> and my laptop for wireless RS232 comms.
My RF linking hasn't gotten past the pencil/paper stage yet,
but here is another option:
http://www.dvp.com/
Most all of my sonar efforts so far have been directed toward
software solutions for filtering out unwanted cross-talk. The
next step will be to add one (or three) transducers to the
single 6500 board.
Enjoy,
- - - Nick - - -
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Message is in Reply To:
 | | Sonar and RF Modem questions
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| HB fans, A few questions for ya ... I just received my polaroid 6500 sonar module from wirz. Cool little gadget. I have the HB expansion board from gleason. Installation looks pretty straightforward with the expansion board, since the pins on the (...) (25 years ago, 17-Feb-99, to lugnet.robotics.handyboard)
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