Alt-BEAM Archive
Message #09770
To: beam@sgiblab.sgi.com
From: BUDSCOTT@aol.com
Date: Fri, 4 Feb 2000 17:14:10 EST
Subject: [alt-beam] Re: Walker Question
thx for the advice, shortly after i mailed that i took a closer look at using
that 74hc245 for a motor drive, certainly much easier to do point to point
on.They say that hobby stores carry something called a hobby servo, i took a
look at the tutorial on how to modify them, but just how common are they?
9771 Fri, 04 Feb 2000 16:15:07 -0600 [alt-beam] Re: How about a starter pack? beam@sgiblab.sgi.com CORBIT GIBERSON
Sathe Dilip wrote:
> Like the hextiles being discussed, I think someone should create a PCB
> design with individual segments being what is useful for a newbie who
> wants to start his hobby in a step-by-step manner. This set could
> include things like:
>
> One each of different solar engine types (FLED, 1381,...)
> A photovore
> Two motor walker
> 2 DOF head
> more?
This is a terrific Idea, Being a newbie myself I know I'd be
intersested. Something like this would certainly help a newbie get
going, because frankly, its a little intimidating getting statrted when
you have no electrical experiance. (And alot of the parts needed for the
schems Ive seen on the web are hard to come by)
-Corbit
9772 Fri, 04 Feb 2000 15:28:53 -0700 [alt-beam] Re: The 240 microcore - was Bicore question beam@sgiblab.sgi.com "John A. deVries II" Oh yeah... a couple of other things...
At 01:08 PM 2/4/00 , Mark W. Tilden wrote:
>If you try to "stuff" a 6Nv with more than three processes,
Although it might be obvious to you, Mark is talking about loops, not
simple chains. Unless you've got REALLY BAD problems (so bad I can't
imagine ) Nv chains don't oscillate. For that matter, loops _do_ in
a manner of speaking -- and they wouldn't be interesting if they didn't!
>get a four process "Hypersaturated" state where the pulses oscillate
>around the core
Obviously, this is fodder for another thought experiment. Which of the
following would be the pattern? For the following, 1's are "processes"
(usually active-low, so it can be confusing) and 0's are "non-processes":
001111 (and any other variations with two "non-processes" right next to
each other... or a four "process" separation -- it just depends on how you
look at it.)
010111 (and any other variations where the two "non-processes" are
separated by one "process"... or three "processes" -- again, it depends on
how you look at it.)
011011 (and any other variations where the two "non-processes" are
separated by two "processes")
In any of these cases, Tilden's "exclusion" principle (where he says that
you can never have two processes immediately next to each other) is violated.
>Fun, but tends to heat up motor drivers really fast.
As was written in a previous note, the chip(s) that implement the Nv
neurons also gets pretty warm, whether there are some kind of motor drivers
attached or not.
ZtF
9773 Fri, 4 Feb 2000 14:46:55 -0800 Re: Walker Question beam@sgiblab.sgi.com BUDSCOTT@aol.com [mailto:BUDSCOTT@aol.com]
thx for the advice, shortly after i mailed that i took a closer look at
using
that 74hc245 for a motor drive, certainly much easier to do point to point
on.They say that hobby stores carry something called a hobby servo, i took a
look at the tutorial on how to modify them, but just how common are they?
9774 Fri, 04 Feb 2000 18:12:08 +0100 [alt-beam] Re: Walker Question beam@sgiblab.sgi.com Laura & Rob Malinowski BUDSCOTT@aol.com wrote:
>
> thx for the advice, shortly after i mailed that i took a closer look at using
> that 74hc245 for a motor drive, certainly much easier to do point to point
> on.They say that hobby stores carry something called a hobby servo, i took a
> look at the tutorial on how to modify them, but just how common are they?
Servos are very common and cheap. Be careful which ones you buy, as in
most of the tutorials a specific brand is mentioned. I bought some ace
servos and found they can't be used for continuous motion(on wheels)
because of the output gear (it is not cut all the way around). Futaba
puts out my favorite servo, but if you want to take out the motor you
will have to remove the gears (no real problem) just remember where the
go. For 360 deg. motion you will have to remove the pot or the insert in
the bottom of the output gear (again if you can build these bots this
will be easy).
R.M.
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