Alt-BEAM Archive
Message #06314
To: beam@sgiblab.sgi.com
From: Bob Shannon bshannon@tiac.net
Date: Sat, 02 Oct 1999 10:24:33 -0400
Subject: [alt-beam] Re: JOC: BEAM/CPU Competition
I'm not far from that area at all!
I've got a few non-BEAM designs running about....
Jim Cook wrote:
> Just out of curiosity, Who here would be interested in MAYBE attending a
> BEAM and CPU robotic competition in the Monadnock Region of New Hampshire,
> South of KEENE and west of NASHUA. in the later part of spring maybe early
> summer?
>
> This is not scheduled and is just for my education.
>
> Sincerely,
> Jim Cook
> beamboter@hotmail.com
> http://www.geocities.com/Area51/Nebula/9874
>
> ______________________________________________________
>
6315 Sat, 02 Oct 1999 14:51:10 GMT [alt-beam] Re: hacking techno-crap beam@sgiblab.sgi.com "Mike Kulesza"
I go to the garbage store, and buy computers and other devices by weight.
-Minitape answering machines have efficient motors.
-All mainboards have 74ALS245's and 74HC14's.
-Oven clock mechanisms or "Oven Timer Units" are used for gear motors.
-All devices have lots of colourful cables in them.
-Ancient video, sound, NIC cards etc... all have plenty of capacitors,
resistors.
>From: "Ignatz"
>Reply-To: beam@sgiblab.sgi.com
>To: "Beam List"
>Subject: hacking techno-crap
>Date: Sat, 2 Oct 1999 08:19:21 -0400
>
>Hey cre:
>
>I'm new to this and looking for a bit of advice. When digging into old tek
>for parts, is there an easy way to identify chips, transistors, capacitors,
>etc? Some sort of part number resource? I've had little success with IC
>Master and Digi-Key searches, but may not have tried hard enough. Just
>yesterday I got an old IBM 5150 computer at the thrift for $2 (same place I
>get piles of RC cars for 50¢). It's loaded with what looks like golden
>crap, but how do I identify the pieces? And is it really worth the time to
>desolder anything more than ICs? Also I'm stoked for the power source for
>my work bench, though it offers no info (other than the standard "NO USER
>SERVICABLE PARTS" warning). Any advice on how to hack that into something
>I can use for real? What am I looking at: 5V @ 20A or so?
>
>Thanks for any help. I've been lurking on this list for only a few days
>and have already learned a heap. Haven't even hit the archives yet...
>
>Get down
>
>Ignatz
______________________________________________________
6316 Sat, 2 Oct 1999 12:36:51 EDT [alt-beam] New Cybug Scorpion Kit beam@sgiblab.sgi.com JVernonM@aol.com Hey all,
I just finished my new kit from Craig Maynard of Cybug fame. The Cybug
Scorpion kit is simply awesome! It is sleek and black with big torquey
motors. It just bullies it's way through my other bots, knocking them out of
the way. The Scorpion is also VERY fast. It scoots along at quite a pace. I'd
highly recommend this kit for anybody who loves solar powered bots! It's
higher voltage level makes the use of a smaller cap (2200uF) possible,
allowing the critter to take big rapid steps. The tactile feelers also are
much more responsive at the higher voltages, making the bot turn at the
slightest touch. It also has almost unlimited ability to expand, such as a
uCore. All this for 35.00 bucks American. It's an easy build, and is quite
impressive when completed. It has size, power, and expandability that always
make Craig's kits seem to go slightly beyond being a hobby robot. Impressive,
affordable, and functional. I plan to post PICS of my customized version and
a couple of other things soon. I suggest you buy more than one. Once you
build this puppy, ideas for customizing and expanding it will start pouring
out of your ears. Stay tuned for the PICS and those tutorials I've been
planning to post.
Jim
6317 Sat, 2 Oct 1999 13:58:31 -0400 (EDT) [alt-beam] Re: Chiu, Contest beam@sgiblab.sgi.com jester96beam@iname.com I know where he is. He's run off with all those nice prizes for himself ;-)
> He may be looking for all the missing contestants.
>
> Pete McCarthy wrote:
>
> > Chiu isn't dead! He's just in hiding.
> >
> > >From: Senior
> > >Reply-To: beam@sgiblab.sgi.com
> > >To: Beam List
> > >Subject: Chiu, Contest
> > >Date: Wed, 29 Sep 1999 16:04:39 -0600
> > >
> > >Is he still alive?
> >
> > ______________________________________________________
> >
6318 Sat, 02 Oct 1999 14:42:49 -0600 [alt-beam] Re: Solarbotics Web beam@sgiblab.sgi.com Dave Hrynkiw At 04:04 AM 10/2/99 , Jason - wrote:
>ermm dave i think it is better if u could spend a few minutes typing and
>explaining in detail rather than showing us the manual....as your way is
>different than andrew miller's and so that the beginner here could see
>which way to use to get better results...thanks for your time
That's my point - it's hard to describe it without pics. I've got full
graphics in the instruction set.
-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
6319 Sat, 02 Oct 1999 14:42:45 PDT [alt-beam] Home pages beam@corp.sgi.com "Jim Cook" Hi guy=92s
I=92m updating my page and am striving for perfection. So, if there is an=
yone=20
who has a ROBOTICS information based web page of any kind that wouldn=92t=
mind=20
it linked to from my page please send ME, not the list (trying to save=20
bandwidth) the URL. I don=92t care if it=92s CPU or BEAM, MINDSTORMS or K=
IT=20
BOT=92S, or SURPLUS supply=92s. I don=92t care my only request is that it=
is=20
related to robotics in some manner.
Thank you
Sincerely,
Jim Cook
Beamboter@hotmail.com
http://www.geocities.com/Area51/Nebula/9874
______________________________________________________
6320 Sat, 2 Oct 1999 19:15:49 EDT [alt-beam] New bot PICs beam@sgiblab.sgi.com JVernonM@aol.com Hi all,
I just uploaded a PIC of the Cybug Scorpion kit to my site. Go to PHOTOVORES
3 if you want to take a look.
Jim
http://www.geocities.com/SoHo/Exhibit/8281/beamart.html
6321 Sat, 2 Oct 1999 19:26:43 -0700 (PDT) [alt-beam] Re: (n)CORE - The Online Magazine for BEAMers! beam@sgiblab.sgi.com James Taylor Sorry to burst your bubble, but I tried to start a
BEAM magazine. However their wasn't a big enough pool
of information to include in just one or two issue, so
I gave up on creation of the first issue.
--- Richard Caudle wrote:
>
>
--------------------------------------------------------------------------------
>
> Salutations all,
>
> Since deciding to take up the slack in the beam news
> department, I will be starting an e'Zine for
> BEAMers. Please feel free to submit articles,
> links, and photos. There is also a section for
> sounding off called Soapbox. For now, the news
> section is the only up-and-running part of the site
> with more to come as it's written. I'll be asking
> for contributions from some members offline, too.
>
> Thanks everybody! Boy, I really hope I don't regret
> this!!:)
>
> Richard Caudle
> richard@cqc.com
> Home ICQ - Frankendaddy
>
>
--------------------------------------------------------------------------------
>
> Guardians of the sacred words: Nee, Ptang, and
> NeeWhon!
>
=====
Everything I say can mean one of two things...If something I say makes you mad....I meant it the other way.
James Taylor
URL: http://fly.to/springmeadows
__________________________________________________
Do You Yahoo!?
Bid and sell for free at http://auctions.yahoo.com
6322 Sat, 02 Oct 1999 19:39:34 -0700 [alt-beam] Re: Solarbotics Web Update... beam@sgiblab.sgi.com Sean Rigter Whoa!
Don't throw out those 2N3904/2N3904s yet. They are the universal
workhorse small signal/switching transistors with a number of desirable
features for beam applications:
1. the 2N3904/06 plastic package makes freeforming far easier than using
non- insulated metal can of the 2N2222/2N2907 transistor.
2. cheap
3. light weight
4. well defined electrical characteristics
They have a lower maximum current rating than the 2N2222/2N2907 but in
many parts of a circuit that is not a concern. Good circuit designs
combine different transistors types, each optimized for the electrical
requirements of the application and duty of the transistor in that part
of the circuit. Gain, noise, current, voltage, saturation, frequency,
and input current are but a few parameters that should be taken into
account. For higher motor current requirements the 2N2222/2907 make good
(but not great) h bridge drivers. 2N4401/2N4403s are better but check
out the Zetex line for really great high current, high gain, low
saturation bipolar drivers. Use 2N7000s mosfets for applications
requiring high input resistance and minimum circuit loading . Use low
Rds complimentary mosfets for the best and simplest h-bridge design
with output currents up to tens of amps and virtually no losses (at beam
frequencies).
Just like it would be stupid to throw out all your golf clubs except
for your #1 driver just to keep things simple, get a selection of
different transistor types and use them as called for in the different
circuit designs.
regards
wilf
SG wrote:
> hmmm. now just tell us what we can substitute 3906's fer.
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