Alt-BEAM Archive
Message #06664
To: beam@sgiblab.sgi.com
From: Richard Piotter richfile@rconnect.com
Date: Mon, 11 Oct 1999 23:27:20 -0500
Subject: [alt-beam] Re: transistors, transitors everywhere
Not sure. I hate Radio Shack packs EXCEPT the resistor and the pF cap
packs (you know how convinient it is to get so many small value pF caps
for so cheap and in one package)!!! Great for overclocking TI calculators!
Save the transistors for low current stuff and tests and use the good
stuff for permanent and high current motors.
SG wrote:
>
> Having Radio Shack as the nearest electronics store, i must confess i have
> resulted (shamefully) to going there a buying a few packs of their 2n3906
> "TYPE" transistor packages.
> Out of the package you might get lucky and find three or four actual 3906's
> in the midst of about 18 transistors.
> (i have since seen the error of my ways and repented, ordering a good
> supply from Dave)
> ahhhh. ...confession is good for the soul.
> my question is , i have a bunch of the "EXTRA" transistors filling up a
> corner of my tackel box. These are marked "5588"
> Are they good for anything? Didn't really want to chance substituting them
> and havn't had the time to experiment.
> also- can you beleve R.S. puts in 3905 transistors in that pack too? def.
> NOT a replacement if i read the specs off the web right.
> -Sparky
--
Richard Piotter
richfile@rconnect.com
The Richfiles Robotics & TI web page:
http://richfiles.calc.org
For the BEAM Robotics list:
BEAM Robotics Tek FAQ
http://people.ne.mediaone.net/bushbo/beam/FAQ.html
6665 Tue, 12 Oct 1999 00:26:14 -0600 [alt-beam] Re: Beam Games beam@sgiblab.sgi.com Dave Hrynkiw At 12:40 PM 10/8/99 , JVernonM@aol.com wrote:
>Does anyone have any information about upcoming BEAM games or the Robot
>Olympics?
Yes; we're currently working on running the "B2K" (aka: BEAM Millennium
Games) in conjunction with the Western Canadian Robot Games. We're
reworking the ruleset as we speak, and arranging venues. More to come as it
gets done. The date is looking to be 9-11 of June.
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
6666 Tue, 12 Oct 1999 05:35:03 +1000 [alt-beam] solar powering the beam ant "beam mailing list" "David Perry"
content-transfer-encoding: quoted-printable
Does any1 know how to solar power the beam ant, i saw somewhere that a coup=
le of PV cells were hooked up to 2 .33F caps and it ran continuosly in the =
sun. Is this true?
David Perry
content-transfer-encoding: quoted-printable
>kits etc.) there?
Hard to say what the admission prices will be, but it won't be enough to
discourage you from coming, THAT'S for sure. As for selling, we'll be there
with a full complement of goodies.... 8>
-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
6668 Tue, 12 Oct 1999 01:47:56 -0600 [alt-beam] Re: Solarbotics update beam@sgiblab.sgi.com Dave Hrynkiw At 04:49 PM 10/8/99 , JVernonM@aol.com wrote:
>Ha! It looks like I may have made a tiny dent. Carbots are here to stay!
>Solarbotics is selling tiny suction cups. Whattayaknow. Site looks great
>Dave. I wish I could download those movie clips, but my modem is not
>cooperating.
Thanks for the comments. I'm going to personally try to keep a bit more
"on-top" of the website than I have in the past. Much easier now that I've
got some more full-time help around the office.
Sorry the movies are being a bit of a pain - we're still trying to figure
out the best codec combinations for size/compatibility for the internet.
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
6669 Tue, 12 Oct 1999 02:09:33 -0600 [alt-beam] Re: solar powering the beam ant beam@sgiblab.sgi.com Dave Hrynkiw At 01:35 PM 10/11/99 , David Perry wrote:
>Does any1 know how to solar power the beam ant, i saw somewhere that a
>couple of PV cells were hooked up to 2 .33F caps and it ran continuosly in
>the sun. Is this true?
ALMOST continually. We just put a video of some BEAMant 6's on our website at:
http://www.solarbotics.com/videos.shtml
There are two, one in AVI, one in MOV format, and both are LARGE
(16/13Meg). Sorry - haven't had the chance to tweak the settings yet.
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
6670 Tue, 12 Oct 1999 07:36:01 -0500 [alt-beam] Re: solar powering the beam ant beam@sgiblab.sgi.com Richard Piotter I personaly like the downloadable files cause they can potentialy have
excelent graphic detail, good lenth of footage, and sometimes sound,
though I think it's less important.
Streaming video is something I like to avoid myself, as I don't know a
way to save the video data, and the quality is lower, but it's great for
people who use a school or library computer to access internet.
Dave Hrynkiw wrote:
>
> At 01:35 PM 10/11/99 , David Perry wrote:
> >Does any1 know how to solar power the beam ant, i saw somewhere that a
> >couple of PV cells were hooked up to 2 .33F caps and it ran continuosly in
> >the sun. Is this true?
>
> ALMOST continually. We just put a video of some BEAMant 6's on our website at:
> http://www.solarbotics.com/videos.shtml
>
> There are two, one in AVI, one in MOV format, and both are LARGE
> (16/13Meg). Sorry - haven't had the chance to tweak the settings yet.
>
> 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
--
Richard Piotter
richfile@rconnect.com
The Richfiles Robotics & TI web page:
http://richfiles.calc.org
For the BEAM Robotics list:
BEAM Robotics Tek FAQ
http://people.ne.mediaone.net/bushbo/beam/FAQ.html
6671 Tue, 12 Oct 1999 10:05:44 -0500 [alt-beam] Suspended Microcore? BEAM Richard Piotter Has anyone ever used a 240 chip and the suspended Bicore design to
create a 4 Nv version? Would it work? I'm trying it out, but if someone
else has tried it, I'd love some input. Also if anone here has worked
with the circuit, how easy/dificult is it to run it in 1 process mode?
I've never seen the 240 used with more than 2 Nvs. Also, is it possible
to use the back to back photodiodes like in a suspended bicore on
diagonal Nvs if the thing is in saturation. How will this affect time
constants, as it's something that NEVER happens in a Bicore unless there
is a problem. I thought of joining adjacent Nvs, but then there is the
question of both being the same again, and if that would have an effect
on the time constants, if it would even DO anything, as 2 cycles would
leave half the suspended circuit dead.
One more... What would happen if all 4 photodiodes had a common floating
cathode. just like in a suspended bicore??? what would suspending a pair
of 2 Nvs seprately, or suspending all 4 together result in. I suppose if
no one else has done any work with this, I'll have to expiriment.
--
Richard Piotter
richfile@rconnect.com
The Richfiles Robotics & TI web page:
http://richfiles.calc.org
For the BEAM Robotics list:
BEAM Robotics Tek FAQ
http://people.ne.mediaone.net/bushbo/beam/FAQ.html
6672 Tue, 12 Oct 1999 12:32:37 -0400 [alt-beam] Re: solar powering the beam ant beam@sgiblab.sgi.com "George Rix" Just drag it from your browser to the desktop. It works in Internet Explore=
r
on my Mac, so it ought to work in Netscape as well. I know because I've
downloaded lots of movies in the past week, most of them streaming.
Peace out!
Rob Rix
Don't take a walk, climb a tree =8B an ancient truism, invented last week.
----------
>From: Richard Piotter
>To: beam@sgiblab.sgi.com
>Subject: Re: solar powering the beam ant
>Date: Tue, Oct 12, 1999, 8:36 AM
>
> Streaming video is something I like to avoid myself, as I don't know a
> way to save the video data, and the quality is lower, but it's great for
> people who use a school or library computer to access internet.
6673 Tue, 12 Oct 1999 13:42:48 -0400 [alt-beam] New (?) drive concept Those Brainy Beam People Peter Low Anyone for building a BEAM millipede?
http://www.s3.kth.se/instrlab/research/projects/polyimideactuators.html
6674 Tue, 12 Oct 1999 13:11:35 -0700 [alt-beam] Re: Suspended Microcore? "'beam@sgiblab.sgi.com'" Wilf Rigter
Hi Richard,
Interesting idea!
One characteristic of the 2Nv suspended bicore is that both stages
simultaneously change state. The process is initiated when the voltage on
either inverter bias point crosses the threshold and the second inverter of
the bicore is "slaved" to the first inverter which generates an identical
but inverted process providing positive feedback to the first inverter to
speed up the transition. A good example of this is a 74HC240 (or a
74HC14!!!) bicore with unequal capacitors (ie 0.1 and 0.33) in which the
inverter with the smaller cap attached to it's input always initiates the
bicore transitions since the voltage at it's input always crosses the upper
and lower thresholds first.
This implies that multiple Nv suspended core must have an even number of Nv
stages for positive feedback. A hypothetical 4Nv suspended "quadcore"
(attached) would also have a controlling inverter with the other 3 stages
"slaved" and changing state at the same time. Therefore a 4 Nv suspended
bicore always saturates to produce processes initiated by whichever of the 4
stages has the smallest time constant but like a bicore, only multiples of
180 degree phase inverted signals are generated. If Photo Diodes were used
in such a network it would cause each process to be initiated by the stage
with the most light on the PDs with each subsequent stage inverting and
reinverting the process around the loop until it is applied "in phase" to
the input of the initiating stage. Perhaps you can test these assumptions
and report back?
<>
Wilf Rigter mailto:wilf.rigter@powertech.bc.ca
> -----Original Message-----
> From: Richard Piotter [SMTP:richfile@rconnect.com]
> Sent: Tuesday, October 12, 1999 8:06 AM
> To: BEAM
> Subject: Suspended Microcore?
>
> Has anyone ever used a 240 chip and the suspended Bicore design to
> create a 4 Nv version? Would it work? I'm trying it out, but if someone
> else has tried it, I'd love some input. Also if anone here has worked
> with the circuit, how easy/dificult is it to run it in 1 process mode?
> I've never seen the 240 used with more than 2 Nvs. Also, is it possible
> to use the back to back photodiodes like in a suspended bicore on
> diagonal Nvs if the thing is in saturation. How will this affect time
> constants, as it's something that NEVER happens in a Bicore unless there
> is a problem. I thought of joining adjacent Nvs, but then there is the
> question of both being the same again, and if that would have an effect
> on the time constants, if it would even DO anything, as 2 cycles would
> leave half the suspended circuit dead.
>
> One more... What would happen if all 4 photodiodes had a common floating
> cathode. just like in a suspended bicore??? what would suspending a pair
> of 2 Nvs seprately, or suspending all 4 together result in. I suppose if
> no one else has done any work with this, I'll have to expiriment.
> --
>
>
> Richard Piotter
> richfile@rconnect.com
>
> The Richfiles Robotics & TI web page:
> http://richfiles.calc.org
>
> For the BEAM Robotics list:
> BEAM Robotics Tek FAQ
> http://people.ne.mediaone.net/bushbo/beam/FAQ.html
Attachment: quadcore.gif
Home