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7816 Thu, 18 Nov 1999 07:51:25 +0100 [alt-beam] Re: Brain energy (was absorbsion circuit) beam@sgiblab.sgi.com Thomas Pilgaard Nielsen
a subject to experimental pain studies at the university of Aalborg.
They've successfully implanted small tube-like devices in the arm of a
paralysed man which gave him the ability of moving his arm again. The
device reads and interprets signals from the nervous system and somehow
changes that into movement by forcing the muscles to react to the
stimuli. It was very interesting.
Cheers
Thomas
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
--
---
"Fremtidens computere vejer maaske ikke mere end halvandet ton."
Popular Mechanics 1949
7817 Thu, 18 Nov 1999 06:51:21 -0800 [alt-beam] Re: PSHEAD V1.1 "'beam@sgiblab.sgi.com'"
indicators only
So far I just tried it with PDs. Some more improvements are coming soon.
regards
Wilf Rigter mailto:wilf.rigter@powertech.bc.ca
tel: (604)590-7493
fax: (604)590-3411
> -----Original Message-----
> From: SG [SMTP:Sparkyg@seark.net]
> Sent: Thursday, November 18, 1999 5:31 PM
> To: beam@sgiblab.sgi.com
> Subject: PSHEAD V1.1
>
> Heynow!
> has anyone had a chance to try this out using photodiodes?
> lemme get this straight, if using a HC or HCT, then the LDRs or PDs go to
> V+ and Grnd > is this correct?
> the green LEDs are just indicator lights in that case?
> Thanks!
> Just tryin to understand it in Laymans terms...
> -Sparkmannn
7818 Thu, 18 Nov 1999 07:07:32 -0800 [alt-beam] Re: 74xx240 problems and solutions "'beam@sgiblab.sgi.com'"
determined by erratic motion and high power when adjusted to operate on the
edge of the powersmart mode. R3 goes into the leg opposite to R2. In the V2
schematic the position of R2 and C2 where swapped and then R3 was added.
Use 1 M pots that are shown only if you don't have the larger ones. Notice
that with the smaller pots the cap value goes up.
One note about the operation of the HLO not covered very well in the
tutorial: Depending on the setting or R1, the frequency of HLO oscillation
at the midpoint can more strongly affected by the resistance of the
photobridge and the part of R1 between the photobridge and the inverter A
input than by the resistance of the part of R1 from inverter A output to
input. The lower resistance part of R1 dominates.
regards
Wilf Rigter mailto:wilf.rigter@powertech.bc.ca
tel: (604)590-7493
fax: (604)590-3411
> -----Original Message-----
> From: SG [SMTP:Sparkyg@seark.net]
> Sent: Thursday, November 18, 1999 8:58 PM
> To: beam@sgiblab.sgi.com
> Subject: Re: 74xx240 problems and solutions
>
> 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
>
>
> << File: psAC.jpg >>
7819 Thu, 18 Nov 1999 07:13:22 -0800 [alt-beam] Re: ChloroPopper "'beam@sgiblab.sgi.com'"
Wilf Rigter mailto:wilf.rigter@powertech.bc.ca
tel: (604)590-7493
fax: (604)590-3411
> -----Original Message-----
> From: JVernonM@aol.com [SMTP:JVernonM@aol.com]
> Sent: Wednesday, November 17, 1999 10:01 PM
> To: beam@sgiblab.sgi.com
> Subject: Re: ChloroPopper
>
> In a message dated 11/18/99 12:41:09 AM Eastern Standard Time,
> kyled@scruznet.com writes:
>
> > 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?
> >
> Yep, it's true that the popper can fire faster (especially with a larger
> cell) under artificial light. But, under sun light the Chloroplast is
> much,
> much faster, because of the use of a smaller cap. The real gain is in
> torque.
> The Chloroplast can twist cheaper, stronger motors with ease. The
> Chloroplast
> can be tuned down to pop under artificial light as well, but I really like
>
> the kick of the higher voltages. And lets not forget that "piggy back"
> capability of the Chloroplast. The best of both worlds would be a trim pot
> to
> adjust the engine to light conditions. Hey Wilf, is there an automatic way
> to
> do this? Seems to me that a photodiode light bridge could automatically
> adjust the voltage level resistance. Whatcha think O swami of the solar
> cell?
> Your highness of hysteresis. The czar of the circuit. OK, I'm done.
>
> See ya,
> Jim
> http://www.geocities.com/SoHo/Exhibit/8281/beamart.html
7820 Thu, 18 Nov 1999 08:47:17 -0700 ChloroPopper BEAM = Richard Caudle =
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 bi=
t 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 circl=
e. 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 o=
utside to see how it worked in the sunlight. To my surprise and delight, i=
t 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 mo=
re 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! =
content-transfer-encoding: quoted-printable
>
x; PADDING-LEFT: 5px; PADDING-RIGHT: 0px">
----- Original Message -----
Sent: Wednesday, November 17, 1999=
9:01 =
PM
9:01 =
PM
Subject: ChloroPopper
Hello all,
I'm baaaack! You can fin=
d the pix =
of 8/2Brutus here:
href=3D"www.geocitie=">http://www.geocities.com/frankendaddy/82Brutus.html">www.geocitie=
s.com/frankendaddy/82Brutus.html
d the pix =
of 8/2Brutus here:
href=3D"www.geocitie=">http://www.geocities.com/frankendaddy/82Brutus.html">www.geocitie=
s.com/frankendaddy/82Brutus.html
I was originally going to call=
it =
Brute, but I thought the other was a bit more clever. I thought tha=
t 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 w=
orked =
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.&n=
bsp; =
We'll see if it works tomorrow...
it =
Brute, but I thought the other was a bit more clever. I thought tha=
t 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 w=
orked =
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.&n=
bsp; =
We'll see if it works tomorrow...
Hey, I just may learn how to d=
o this =
thing after all!
o this =
thing after all!
Richard Caudle
href=3D"www.geocities.com/frankend=">http://www.geocities.com/frankendaddy">www.geocities.com/frankend=
addy
Home =
ICQ - Frankendaddy
href=3D"www.geocities.com/frankend=">http://www.geocities.com/frankendaddy">www.geocities.com/frankend=
addy
Home =
ICQ - Frankendaddy
Guardians of the sacred words:=
Nee, =
Ptang, and NeeWhon! =
Nee, =
Ptang, and NeeWhon! =