Alt-BEAM Archive
Message #12838
To: beam@sgiblab.sgi.com
From: Richard Piotter richfile@rconnect.com
Date: Thu, 30 Mar 2000 16:21:28 -0600
Subject: [alt-beam] Re: Soda Walker Simulation
Geez! That address has been poping up everywhere! Even made an
appearance in the daily reader comments at http://www.nintendorks.com
That thing's getting some publicity!
> Maynard wrote:
>
> Here's a terrific walker simulator which animates and edits two
> dimensional models made out of masses and springs. Play around with
> the creatures gravity, friction, and muscle movements to keep your
> bio-synthetic creatures scrambling around... Let me know what you
> think!
>
> It's at http://www.soda.co.uk/soda/constructor/
>
> Craig Maynard
> JCM Electronic Services
> 3335 Caribou Drive NW
> Calgary, Alberta, Canada T2L-0S4
>
> ( http://members.home.net/cybug
)
> Enter the Millennium robotgames at http://www.robotgames.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!!!
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12839 Thu, 30 Mar 2000 14:22:34 -0800 (PST) [alt-beam] Re: Spam Lesson - was:Emerging Growth Stocks beam@sgiblab.sgi.com Lee Golden Guys --
I don't mean to burst your bubble, but two things:
1) By replying to the message, all you are doing is
sending your delete request to the BEAM list, and...
2) You should never, ever respond to a spam message,
either directly, or *especially* by following the
directions to remove yourself from the list. If there
even *is* a Gary Basinger, all you are doing is saying
"Here! My email address really IS valid -- keep it on
your Spam list and pass it on!".
The best thing to do with Spam is to mutter under your
breath and press delete, and if you are getting
repeated messages from the same address just block it
with your email program...
Lee Golden
--- "Phillip A. Ryals" wrote:
> I sent him a nice (read: mean) letter. I told him
> how he's annoying
> everyone on the list, and no one would want to do
> business with a spam
> artist. :)
>
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12840 Thu, 30 Mar 2000 17:30:29 -0500 [alt-beam] Re: Charging NiCads beam@sgiblab.sgi.com "Sathe Dilip" This is what I would do:
Hopefully you know the family or type of the battery you are dealing
with such as Ni-Cd, Ni-Fe, Ni-MH & so on. Some of the constants such as
end of charge or discharge voltage per cell depend on the type of the
battery. Some families need very precise charge control - these
probably will be out of scope for the following technique.
Typically for a given family, the physical size of the battery is
proportional to the capacity. Calculate the volume of the battery.
Calculate the volumes of a few known sizes (say AA, C, D). Capacities
of standard sizes are published by the manufacturer. Now using the
ratio of volumes & known capacity, you can extrapolate the capacity of
the unknown battery.
Charge the battery for 14 hours at 1/10 th of calculated capacity.
Discharge the battery with a known resistor that will load the battery
at 1/10 the calculated capacity.
Monitor the voltage while discharging every 15 minutes or so. (actually
I think you have to really watch it after the first 6 hours or so)
Once the battery discharges to the end of discharge value (For Ni-Cd
this would be 1 volt/cell), by noting the time you will know how well
the battery was charged. If the battery is new, it should give you
about 10 hours.
By conducting the experiment a few times while tweaking the charging
current, you can standardize your charging cycle.
Hope this helps.
Dilip
---------------------------------------
robmc@acay.com.au wrote:
SNIP
> Sathe, All,
>
> How do you go about it when the capacity (ampere hours) is unknown? If
> the charging current is too low the battery may lose capacity. Would
> the temperature be a good indicator or the battery voltage?
>
> Rob
--
----------------------------------------------------------------------
The early bird may get the worm, but the second mouse gets the cheese.
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12841 Thu, 30 Mar 2000 19:20:31 EST [alt-beam] Re: FRED tutorial beam@sgiblab.sgi.com BUDSCOTT@aol.com About your vibrobot, i's thinkin about getting some more pager motors from
MPJA. And be it so that those freakin' eccentrics are so hard to get off, i
was gonna try an build on of those myself. How well does that FRED circuit
work compared to the 1381 eh? effiency? activity? Thanks!
-Spencer
<http://www.botic.com/users/beamstop>
not a robot scientist
not a college major
not a grad student
not a professor
not a very organized person
just Spencer (isn't that impressive enough?)
12842 Fri, 31 Mar 2000 12:29:37 +1200 [alt-beam] uCore and bicore "Andrew Hooper" I have been trying to figure out a way of tying my Wisker sensor into a
bicore/ucore so on the
bench i constructed one with 2 NVs.
On the left I have NV 1a & 1b.
On the right NV 2a & 2b.
The circut cycles in the following manner..
| 1a | 1b | 2a | 2b |
| 1 | 0 | 1 | 0 |
| 0 | 1 | 0 | 1 |
Cycles with a 50% duty cycle.
Now wisker i setup is connected to pin 1 of the 74c14 also there is a
resistor going to ground (10meg), the circut seems to be functioning
correctly, and im getting some interesting feedback from the wisker
but whatever change is made happens also to 2a.
| 1a | 1b | 2a | 2b |
| 1 | 0 | 1 | 0 | on
| 0 | 1 | 0 | 1 |
Cycles with 80/20% Duty Cycle.
Do i need to seperate both of the NV's so that they opperate individually?
Regards
Andrew
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