Alt-BEAM Archive
Message #02315
To: beam beam@corp.sgi.com
From: Richard Piotter richfile@rconnect.com
Date: Wed, 14 Apr 1999 12:21:53 -0500
Subject: [alt-beam] Re: Hey, about those Nv layout thingies...
Each circle is one Nv. Think of a circle like this:
__________
/ \
/ \
/ |\ \
_ / || | \ \
__/ \/--||--o--| >o----\___
\_/\ || | | / /
\ < |/ /
IN \ > / OUT
\ _|_ Gnd /
\__________/
You can have outputs go to more than one place. You ought to be able to
join multiple inputs, but I don't know how to do the electronics for
that. There is also another point that is often used for bias. Think of
it like a tap on the resistor. You can make the tap more or less
resistive by increasing or decreasing the resistance of the bias,
allowing you to adjust the time constant of the Nv. You could attach it
to the point where the resistor, capacitor, and inverter inputs join, or
you can attach it between 2 resistors in series (instead of the one like
normal). I don't recomend connecting it on the ground side, cause it
would short straight to ground.
__________
/ \
/ \
/ |\ \
_ / || | \ \
__/ \/--||--o--| >o----\___
\_/\ || | | / /
\ __< |/ /
IN \ / > / OUT
X _|_ Gnd /
/ \__________/
/
/
Bias
Hope this makes sense.
George Rix wrote:
>
> > They are aranged in patterns cause that's how they are wired together,
> > duh! (:
> Yeah, but I mean, why don't you put them in a rectangle and connect them in
> whatever order? Does it matter? Is it just for show? I mean, like, your
> Spyder one looks like a big X, but some of Mark Tilden's ones are rather
> indescribable. Sort of like something you'd get from a Spirograph.
> > A neural network for one robot won't always look like another one! Not
> > all brains are created equal. THAT is why the patterns are diferent. It
> > also goes to show that diferent brains can accomplish the same task,
> > some faster, some better, or not!
> Okay, I think I got it now.
> > Also, Tilden uses arrows in his diagrams quite often, and + & - signs to
> > indicate the inputs, since in BEAM, there are no true inhibitory inputs.
> > There also is a little diference as BEAM integrates the body and the
> > brain to a certain extent. Some of his drawings get a little confusing
> > because of this.
> Yeah, okay, I'm pretty sure I have it.
> Thanks!
> Also, to draw a schematic for this, what would you do? Just make a bunch of
> microcores and wire them appropriately?
> Signing off,
> Rob Rix
> ___________________________________________________________________________
> 'Your simian countenance suggests a heritage unusually rich in species
> diversity' - Calvin & Hobbes, by Bill Watterson
--
Richard Piotter
richfile@rconnect.com
The Richfiles Robotics & TI web page:
http://richfiles.calc.org
For the BEAM Robotics list:
BEAM Robotics Tek FAQ
http://people.ne.mediaone.net/bushbo/beam/FAQ.html
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