Alt-BEAM Archive

Message #11520



To: beam@sgiblab.sgi.com
From: "Sathe Dilip" sathe_dilip@bah.com
Date: Wed, 08 Mar 2000 11:54:44 -0500
Subject: [alt-beam] Re: Was lobster, now bees


Another suggestion is to use different frequencies for different
messages. This way you can convey more information in one chirp. At
the receiving end one could use a simple PLL (565?) with some tone
decoders.

Dilip
----------------------------------

Andrew Henshaw wrote:
>
> Bruce Robinson wrote:
>
> >The original sound circuit was designed to count "chirps" received. So
> >you can modify the circuit to send 4 or 5 different signals by having it
> >produce different numbers of chirps. And you can modify it to receive
> >those signals by counting the chirps.
>
> It might be interesting to have the pulse rate increase with the quality of
> the food. That is, a phototropic robot that found a nice sunny spot would
> be more "insistent" than one that was in partial shade. I imagine this
> would complicate the current "recognition" circuitry, however.

--
----------------------------------------------------------------------
The early bird may get the worm, but the second mouse gets the cheese.
----------------------------------------------------------------------



11521 Wed, 08 Mar 2000 09:21:54 -0800 [alt-beam] Re: Was lobster, now bees beam@sgiblab.sgi.com Bruce Robinson Andrew Henshaw wrote:
>
> It might be interesting to have the pulse rate increase with the
> quality of the food. That is, a phototropic robot that found a
> nice sunny spot would be more "insistent" than one that was in
> partial shade. I imagine this would complicate the current
> "recognition" circuitry, however.

That's a nice idea, Andrew. It may actually be simpler to recognise a
change in pulse rate rather than count chirps.

Always keep in mind that the idea is to send a SMALL amount of
information between robots ... just 2 or 3 recognizable signals. This
should be all that is needed with out typical BEAM robots. After all,
How much useful information does a robot have, anyway?

Bruce



11522 Wed, 08 Mar 2000 09:34:02 PST [alt-beam] Re: Tower hobbies servo beam@sgiblab.sgi.com "Timothy Flytch" All I'm saying is:
Tower hobbies servo Dose not = Tower hobbies servo Dose not =
Tower hobbies servo Dose not = Tower hobbies servo Dose not =
Tower hobbies servo...

They are very inconsistent... Just like rat shak... I have flown some
(throttle only) and had troubles... I know others that swear by them and
some that swear AT them...
I'm one of the latter...
I hate inconsistencies!!! but for "just a bot"... they may be just fine...
if your bot is not "just a bot" then use a name brand...
Futaba is my favorite... But most name brands are good...
I have worked for a manufacturer... and let me tell you... If your name is
not on the end product you cut corners and send them all your rejects... It
was a standing joke in the shop... Ops!!! well that's one for
"kond-a-showki"!!!(our china based resaler) we sent them some real trash...
So never belive that you are getting any brand xyz's quality just because
xyz made it... most high production companies use this kind of out lets to
get rid of there trash...
here is there URL for tower....
I would also say stay clear of Kyosho... They look nice but are nothing
compared to the competition... it's all just window dressing...

http://www.towerhobbies.com/

Timothy...


>How are Futaba brand servo motors??? Had one, but it was destroyed due
>to mistakes by me! :)
>
>The other Futaba I had was easily modified for continuous rotation.
>
>I'm looking for a combo of durability, strenth (even if slow), and
>efficiency. I want to make sure these things are worth the cost.
>
>
>Dave Hrynkiw wrote:
> >
> > At 12:06 AM 3/8/00 , Timothy Flytch wrote:
> > >Be vary careful with Tower... they are a lot like Rat Shak... They will
> > >put their name on anything!!! They always use the lowest bidder... and
>are
> > >very inconsistent... I would say stick to the name brands...
> > >
> > >>i really want to start on a second walker and was thinking of using
>the
> > >>servos from solarbotics (the tower hobby ones). Are they decent to use
>for
> > >>the cost?
> >
> > We've never had any problems with these TS-53's - solid units, although
>a
> > bit noisy. But they're easier to modify than the HITEC units, which is a
>plus!
> >
> > Regards,
> > Dave
> > ---------------------------------------------------------------
> > "Um, no - that's H,R,Y,N,K,I,W. No, not K,I,U,U, K,I,_W_. Yes,
> > that's right. Yes, I know it looks like "HOCKYRINK." Yup, only
> > 2 vowels. Pronounciation? _SMITH_".
> > http://www.solarbotics.com
>
>--
>
>
>Richard Piotter The Richfiles Robotics & TI web page:
>richfile@rconnect.com http://richfiles.calc.org
>
>-- Make Money by Simply Surfing the Net or responding to E-Mail!!!
>-- Click below!!!
>
>http://www.alladvantage.com/go.asp?refid=ATL147
>http://www.spedia.net/cgi-bin/dir/tz.cgi?run=show_svc&fl=8&vid=329630

______________________________________________________



11523 Wed, 8 Mar 2000 12:46:21 -0500 [alt-beam] Re: Was lobster, now bees "Richard Caudle"
content-transfer-encoding: quoted-printable

The Sonics article that (TA)Wilf wrote a while back can be found in the arc=
hives and at: www.geocities.com/frankendaddy/sonics.html . I have a PCB =
designed to be used as an expansion for the HPV using this circuit. At pre=
sent, I'm working on a variation of this circuit that will be positive audi=
otropic (or negative, if you like). A photodiode could also be easily plac=
ed in the circuit to increase the 'urgency' of the chirps. I imagine that=
a MUX could be added, but it would have to be another board, due simply to=
the size ofthe circuit. The HPV BaseBoard is 1.000" X 0.600" (25.4mm X 15=
.24mm for the rest of the world!). =


There are some other interesting articles there from the old (n)CORE e'zine=
that I tried to do last year. Most from our friend Wilf. If anyone else=
has something they'd like to have posted, shoot 'em off and I'll get 'em u=
p.

Richard

p.s. TA =3D "The Amazing"


content-transfer-encoding: quoted-printable



Type>
The Sonics article that=
(TA)Wilf =

wrote a while back can be found in the archives and at:
href=3D"www.geocities.co=">http://www.geocities.com/frankendaddy/sonics.html">www.geocities.co=
m/frankendaddy/sonics.html .   =

I have a PCB designed to be used as an expansion for the HPV using this =

circuit.  At present, I'm working on a variation of this circuit that =
will =

be positive audiotropic (or negative, if you like).  A photodiode coul=
d =

also be easily placed in the circuit to increase the 'urgency' of the =

chirps.   I imagine that a MUX could be added, but it would have =
to be =

another board, due simply to the size ofthe circuit.  The HPV BaseBoar=
d is =

1.000" X 0.600" (25.4mm X 15.24mm for the rest of the world!). >
 

There are some other interesting=
articles =

there from the old =

(n)CORE e'zine that I tried to do last year.&nb=
sp; =

Most from our friend Wilf.  If anyone else has something they'd like t=
o =

have posted, shoot 'em off and I'll get 'em up.

 

Richard

 

p.s. TA =3D "The =

Amazing"




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