Alt-BEAM Archive
Message #07808
To: beam@sgiblab.sgi.com
From: "Travis D." beam_bot@yahoo.com
Date: Wed, 17 Nov 1999 20:23:53 -0800 (PST)
Subject: [alt-beam] Re: Brain energy (was absorbsion circuit)
I remember at a technology conference there was a
robotic arm controlled by electromagnetic pulses given
off by your arm muscles. You would hook up the
electrodes to two muscles in your forearm, and when
you contracted/released, it would send the signal to
the hand which would close/open. Really cool
(University of Nebraska project--cost $10000--ouch!).
--- Benjamin Edward Hitchcock
wrote:
> ----- Forwarded message from Timothy Flytcher -----
>
> >they showed
> >this lab where they had hooked up something to this
> woman and used it
> >instead of the mouse, and she could actually move
> the cursor by thinking
> >about it. If it didn't work, she said that getting
> angry didn't help, so it
> >was difficult to stay calm.
>
> there is or was a company in Santa Barbara CA that
> manufactures them... I
> have seen a video game using this technology... But
> I have yet to see a
> wheel chair equipped with one(that's what their
> design was for)
>
>
------------------------------------------------------------------------
> I have played with one of these units at a science
> centre. It has a
> couple of electrodes that touch your forehead, and a
> computer figures out
> wh rhythm you are putting out. Depending on that,
> you could control the
> position of a cursor on screen. You could change
> the position, colour and
> shape of a brush in a painting program.
>
> The best I could do was a random set of blotches and
> squiggles, but I'm
> sure with practice peole could do a lot better.
>
> The thing is, there's absolutely minimal energy
> available here. So for
> control it's possible (?) but for energy? No way.
>
> Ben
>
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7809 Wed, 17 Nov 1999 20:59:21 PST [alt-beam] Re: Brain energy (was absorbsion circuit) beam@sgiblab.sgi.com "Timothy Flytcher" > >they showed
> >this lab where they had hooked up something to this woman and used it
> >instead of the mouse, The thing is, there's absolutely minimal energy
>available here. So for
>control it's possible (?) but for energy? No way.
>
NO...NO...NO... we are talking Apples and Oranges here... this is from two
conversations and some how they collided...
Apples--- power from the human body...
Oranges--- control from brain waves...
or did I miss something too???
Timothy...
______________________________________________________
7810 Thu, 18 Nov 1999 22:58:20 -0600 [alt-beam] Re: 74xx240 problems and solutions beam@sgiblab.sgi.com SG
--=====================_943009100==_
so Wilf;
if i understand you correctly, when using the 74AC240,
try taking off the LEDs, (and their resistor), and putting
a resistor between pin 3 and 11?
correct? (see attached file)
just for grins, i tried the resitor on 3 and 11
with the version 1.0 configuration RESULT:
the motor changed direction very quickly (with old config there was a STOP
between change of directions) BUT the motor NEVER switched off, no
"powersmart" .
I deduce that this is because of the old resistor values.
I'll try again with the reccomended 1M pots. (hafta go to the big city and
get them first)
Thank 'ye
-Sparkeee
--=====================_943009100==_
Attachment: psAC.jpg
--=====================_943009100==_
--=====================_943009100==_--
7811 Thu, 18 Nov 1999 00:11:35 EST [alt-beam] Re: ChloroPopper beam@sgiblab.sgi.com JVernonM@aol.com In a message dated 11/17/99 11:04:50 PM Eastern Standard Time,
richard@cqc.com writes:
> I was originally going to call it Brute, but I thought the other was a bit
> more clever.
Hi Richard,
Very nice bot there! And very orange as well :). I just love the monochrome
look. I am definitely going to try my hand at one of those babies. I saw the
potential of the Chloroplast in Craig's great Solarfly kit. It literally
caught up to my photopoppers even with a half track head start and dragged
them to the finish line. Throw away those pager motors boys, the brutes are
coming!
See ya,
Jim
http://www.geocities.com/SoHo/Exhibit/8281/beamart.html
7812 Thu, 18 Nov 1999 16:25:15 +1100 [alt-beam] Re: absorbpsion circuit or something beam@corp.sgi.com Jacob Booth At 01:31 AM 11/17/99 +1000, you wrote:
>
>
>I've had an idea cooking in my little bit of brain for about 10 years or
>so...Walkers that live in the area between the false ceiling of office
>buildings and the true ceiling. I have a voltage detector that indicates
>presence of 50V about 8 to 10 inches from the ends of flourescant tubes
>(lamps). I figured that there was some way to use that energy to trickle
>charge the 'bots during the day so that they could perform security and
>surveillance during the night (when the lights are off). Parasitic feeding
>in an abstract sense.
>
>Richard
>
I hope that none of you see this type of energy 'free', as it isn't. It
actually will increse the loading on whatever circuit you are feeding from.
Picture the Electricity company that finds you with a great big coil
sitting next to one of their pole transformers. Your house running on free
electricity? They won't see it as 'free' and will commence legal
procedings... (I have a magazine article about a guy who did this to power
his caravan).
If, however you see it as a way to get energy to your bot without wires...
go for it. I really don't think there would be enough 'stray' energy to do
very much useful work at all. I recall seeing a program about the USAF
testing a radio control plane that had electric motors, that were
'inductively coupled' by a microwave base station. It pointed a
concentrated beam of radiation at the plane and tracked it(hmmm a use for
a head-bot here :). The beam was pretty strong though, and the coils
(inductors, whatever :) were built into the wing. It worked, but not over a
very large range at all. I would hate to be between the transmitter and the
plane... quite a few charcoal chickens dropping from the sky :)
I like the coupling idea though. Video recorder heads use this to send the
signals from the heads (which rotate) to the mount (which doesn't). No
other way would be possible. Sliding contacts would be too noisy
(electronically that is). Maybe if you have a defunct recorder you may have
a source of matched inductors (the rotor and stator ones). I'd like to see
an absolutely tiny bot that runs via induction. No batteries, no solar
charging time. This isn't a unique idea, I remember seeing an article about
a man in Japan who built tiny bots that ran on this principle. He was a
watchmaker by trade so he had an unfair range of parts and skills :(
Bot - on
Jacob
------------------------------------------------------------------
Jacob Booth BIS, MCP Web http://www.its.mary.acu.edu.au/
IT Services Email j.booth@mary.acu.edu.au
Phone (02) 97392235 Fax (02) 97392924
Australian Catholic University - MSM Campus Strathfield NSW
7813 Wed, 17 Nov 1999 21:35:01 -0800 [alt-beam] Re: ChloroPopper beam@sgiblab.sgi.com Senior Nothing personal against the chloroplast, again!
You say it takes 23 seconds for each fire? What do you mean by fire? One
motor goes? How long?
I've built a 1381 photopopper with a calculator cell (read: small! :),
and it'll fire every 9 seconds under same conditions, for about 1.5
second long pops. So I was thinking, if yours takes 23 seconds with both
those massive cells on there.. whoa! but how big are the caps?
Adios,
kyle
Richard Caudle wrote:
>
> Hello all,
>
> I'm baaaack! You can find the pix of 8/2Brutus here:
> www.geocities.com/frankendaddy/82Brutus.html
>
> I was originally going to call it Brute, but I thought the other was a
> bit more clever. I thought that I had to add more things to the
> circuit when I took it to work today. I put it on my desk and all it
> would do is circle. I used a 60W bulb, 8" away and it fires every 23
> seconds or so. Before taking it apart to add a pot for tuning, My
> officemate wanted to take it outside to see how it worked in the
> sunlight. To my surprise and delight, it turned right around and
> faced the sun! When I add the feelers, the plan is to bypass the
> photocells to give the motor on the affected side a bit more of a
> shot. We'll see if it works tomorrow...
>
> Hey, I just may learn how to do this thing after all!
>
> Richard Caudle
> www.geocities.com/frankendaddy
> Home ICQ - Frankendaddy
>
> Guardians of the sacred words: Nee, Ptang, and NeeWhon!
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