Alt-BEAM Archive
Message #11791
To: beam@sgiblab.sgi.com
From: Max Inggal tacoman101@yahoo.com
Date: Tue, 14 Mar 2000 08:38:21 -0800 (PST)
Subject: [alt-beam] Re: Turbots
The only turbots that can "kill" other bots are the
ones with more than one arms. The only bots that are
immune to a tubots attack is the miniball and
hemiball. The hemiball is one of my own designs that
instaed of using both halves of a mini ball to make
one bot I use one half for one bot. It's basically a
turtle photovore. the only possible way for a turbot
to kill it is flip it and snag a wire or something.
Which is hard since the bot is nothing but shell on
the outside and the shell is just a faction of a
millilmeter off the ground. The only thing that
sticks out of the shell are the photodiode "eyes",
solarcell, and tactile sensors. This is just a tip on
what bots are immune to turbots if you are so inclinde
to build a bunch of turbots.
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11792 Tue, 14 Mar 2000 10:34:03 -0700 [alt-beam] Re: scoutwalker2 details beam@sgiblab.sgi.com Dave Hrynkiw At 05:44 AM 3/14/00 , StickG@aol.com wrote:
>So Dave, you're saying that all these different behaviors that people have
>described (crabwalk, back up, pivot, arching turns etc...) come from that one
>MUX?
Partially.
Crabwalk - dunno where that came from
backup/pivot - MattMux
arching turn - prototype SW2 had eyes that would make it do this. Removed
from 2nd revision boards to streamline troubleshooting.
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
11793 Tue, 14 Mar 2000 10:11:56 -0800 [alt-beam] Re: Problems with my 3 motor walker! beam@sgiblab.sgi.com Bruce Robinson > Dane Gardner wrote:
>
> ... I set out to build a Chiu style 3 motor walker ...
> ... can't seem to figure out the motor turning order.
From his schematic ...
Front CCW
Back CW
Waist CW
Front CW
Back CCW
Waist CCW
That is, assuming his motor polarities are consistent (it really helps
to trace out the circuit with coloured highlighters, working back from
the motors through the driver to the Nv).
For three motor walkers, reversing the direction is simple ... just
invert the rotation of the waist motor while keeping the others the same
(so if the above sequence walks backwards, swap the waist motor wires).
I suspect this rule will apply to all types of "waisted" walkers, but I
haven't confirmed it for sure.
Bruce
11794 Tue, 14 Mar 2000 14:04:24 -0500 1000k pots Corey Centen
> Hi everyone,
>
> Are 1000k pots too high to make a standard photovore? I couldn't find any
> small 100k's at radio shack, I think they were all out. Also, can
> photoresistors be used in the place of photodiodes? I got something at
radio
> shack called cadmium photocells. I'm not sure if they are the same as the
> photodiodes or resistors? Any help would be appreciated.
>
> Thanks!
> ______________________________________________________
>
11795 Tue, 14 Mar 2000 14:20:14 -0500 [alt-beam] Re: mini motors "William Cox" These are LEGO parts? Are they in the standard catalogs?
-William
> > I've seen Fang's treaded beast, but I'm working on something a lot
> > smaller/lighter...Has anyone else tackled the tread problem in a tiny
bot?
> > Looking at microvore sizes in the near future.
>
> I'm looking into it, and believe it or not, some of the best looking
> stuff I've seen is some lego parts. Lego isn't cheap, but it's an
> unlimited supply of parts that are available for ever and ever. Unlike
> certain excellent gearmotors we could name :-)
>
> Part 5119 - ultra miniature gearmotors (not much more than 1x1x1cm).
> Never used them, but someone on the list played with some a while back
> and was quite impressed with the efficiency. NZ$30 each (approx US$16)
> Part 5278 - chain links x35 (ie miniature caterpillar tracks, about 5mm
> wide) very close to that MIT "Ant" look.. NZ$9.50 (approx US$5). You
> might need two sets if your tracks are long.
> Part 5229 - Assorted gears that mesh with the above tracks. Add a paper
> hubcap, spray-paint them silver or black, and no-one will ever know
> you're using lego :-) Additional bonus - they slot right onto the
> gearmotors. NZ$11.50 (approx US$6)
>
> Costly, but I figure this is more than offset by the construction hours
> saved. (And that MIT "Ant" look is pretty cool :-)
>
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