Driver to drive?

[John Bailey]

On Wed, 22 Dec 2004 12:56:47 +0000, John Woodgate
<jmw@jmwa.demon.contraspam.yuk> wrote:

I read in sci.electronics.design that John Bailey
john_bailey@rochester.rr.com> wrote (in <41c961e9.30717838@news-
server.rochester.rr.com&gt about 'Neato chaotic equations for analog
computers to display?', on Wed, 22 Dec 2004:
There was a useful thread on sci.fractals in 1997

Are all the threads on that group infinitely long? (;-)

ROTFL!
At least many of the URL's are. Your browser actually added the
ellipses.

In the interest of brevity, I have put a redirection script at:
http://home.rochester.rr.com/jbxroads/interests/sci.fractals/3d_chaotic_ode.html


John Bailey
http://home.rochester.rr.com/jbxroads/mailto.html

 

[Nicholas O. Lindan]

"Highland Ham" <abcgm0csz.kn6whxyz@abcntlworldxyz.com> wrote

WD40 is NOT the right cleaning agent for electrical systems
involving plastic insulation re wiring, etc.

That was also my impression. But I have used it on plastics and
have not found any problems after 20 years. Famous last words,
I know. I have used it as a contact cleaner with great success.

--
Nicholas O. Lindan, Cleveland, Ohio
Consulting Engineer: Electronics; Informatics; Photonics.
Remove spaces etc. to reply: n o lindan at net com dot com
psst.. want to buy an f-stop timer? nolindan.com/da/fstop/

 

[Lou Pecora]

In article <kqw88nGfLJyBFwZu@jmwa.demon.co.uk>,
John Woodgate <jmw@jmwa.demon.contraspam.yuk> wrote:

has anyone created a nonlinear/chaotic circuit in SPICE?

Intentionally? (;-)

Intentiionally and unintentionally. I understand that SPICE can be a
bit 'dangerous' to use in modeling chaotic circuits since some versions
(older ones?) use ODE's to model things like transistors and diodes, but
other versions (newer?) use lookup tables. The latter, I am told and
can believe, will not capture chaotic behavior.

-- Lou Pecora (my views are my own)

 

[Lou Pecora]

In article <jaris0tps86elaesrj9j1740ctqr7s3c0h@4ax.com>,
James Meyer <jmeyer@nowhere.net> wrote:

I have a spice model that demonstrates chaos. The simulation will run
as long as you care to let it run and will produce chaotic results that are
stable.

Jim

There are a lot of systems that behavior according to the Shadowing
Theorem (see Yorke, et. al and probably others) wherein, roughly, for
any calculated trajectory there is a real trajectory that follows it
within some epsilon for some specified length of time (arbitrarily
long). So models will not 'run well' for a while and then diverge off
into 'junk.' So, you're right, you can run the model as long as you
like.

-- Lou Pecora (my views are my own)

 

[Frithiof Andreas Jensen]

"normanstrong" <normanstrong@comcast.net> skrev i en meddelelse
news:Hl2ud.541131$D%.253933@attbi_s51...

Have you ever bought one of those strings of 100 lights that sells for
$1?

I just bough a DVD-player for one of the children - DKK 339 - or about USD
60 at today's price. That includes 25% VAT, Profit for the shop, profit for
the Importer and Shipping from China.

Did the Chinese manufacturer make a profit - naah, don't think so.!

 

[martin griffith]

On Wed, 22 Dec 2004 17:11:17 +0100, in sci.electronics.design
"Frithiof Andreas Jensen"
<frithiof.jensen@diespammerdie.jensen.tdcadsl.dk> wrote:

"normanstrong" <normanstrong@comcast.net> skrev i en meddelelse
news:Hl2ud.541131$D%.253933@attbi_s51...
Have you ever bought one of those strings of 100 lights that sells for
$1?

I just bough a DVD-player for one of the children - DKK 339 - or about USD
60 at today's price. That includes 25% VAT, Profit for the shop, profit for
the Importer and Shipping from China.

Did the Chinese manufacturer make a profit - naah, don't think so.!

A shipping company probably had a ship container that had some unused

space, and the lights where used as packaging, sort of hitech
bubblewrap


martin

Serious error.
All shortcuts have disappeared.
Screen. Mind. Both are blank.

 

Don't be so quick to laugh - this DOES happen. Oftentimes when there is
empty space in a container, the shipping company or an employee of that
company will invest a couple of hundred dollars in random junk to fill
the space and maybe turn a little profit.

 

[martin griffith]

On 22 Dec 2004 08:29:28 -0800, in sci.electronics.design
larwe@larwe.com wrote:

Don't be so quick to laugh - this DOES happen. Oftentimes when there is
empty space in a container, the shipping company or an employee of that
company will invest a couple of hundred dollars in random junk to fill
the space and maybe turn a little profit.
I wonder what they send bck to china in the containers? I cant imagine

the chinese need much from the EU or US


martin

Serious error.
All shortcuts have disappeared.
Screen. Mind. Both are blank.

 

Money.

 

Jim Prince wrote:

Thank for pointing out some of the things I may have added to my
request.

I wish to test power supplies with typical outputs: 3.3, 5, 12 V
and not so typical: 22, 28 V, including transient response tests.

I purposely left my request vague, I am looking for what might be
available
as a starting point.

You have proven that you can be critical of my request, now how about
somw
help.

Respectfully, Jim Prince

If you'd like to consider a very nice commercially built unit for not
much $, you can contact me by looking at the very bottom of this
webpage:

http://www2.whidbey.net/opto/LEDFAQ/The%20LED%20FAQ%20Pages.html
I have one that is surplus to my needs.
Paul Mathews

 

[Charlie Gibbs]

In article <b1ED7GGP8WyBFwOu@jmwa.demon.co.uk>,
jmw@jmwa.demon.contraspam.yuk (John Woodgate) writes:

I read in sci.electronics.design that John Bailey
john_bailey@rochester.rr.com> wrote
(in <41c961e9.30717838@news-server.rochester.rr.com&gt
about 'Neato chaotic equations for analog
computers to display?', on Wed, 22 Dec 2004:

There was a useful thread on sci.fractals in 1997

Are all the threads on that group infinitely long? (;-)

Not yet.

--
/~\ cgibbs@kltpzyxm.invalid (Charlie Gibbs)
\ / I'm really at ac.dekanfrus if you read it the right way.
X Top-posted messages will probably be ignored. See RFC1855.
/ \ HTML will DEFINITELY be ignored. Join the ASCII ribbon campaign!

 

[Joel Kolstad]

"Ian Stirling" <root@mauve.demon.co.uk> wrote in message
news:41c877d8$0$45370$ed2619ec@ptn-nntp-reader03.plus.net...

Sure - You can also pop down the shop and buy a Power Meter which plugs
into

And have the added fun of being several hundred percent out on some
loads.

If it's as accurate as his electric company's power meter, he's probably
going to be happy!

 

[Jim Yanik]

John Miles <jmiles@pop.removethistomailme.net> wrote in
news:MPG.1c32b900236c823e98975f@news-central.giganews.com:

Some of these gurus are admittedly respected veterans of companies
such as Tektronix, with whom mere mortals are loath to argue.

I worked for TEK for 21.5 years as a service tech in 2 of their field
offices;repaired and cal'd a lot of scopes and other TEK products.

All I
can say is, those switches must not have been of the greatest quality
in the first place, or the gurus wouldn't have to spend so much of
their time on Usenet warning people against hosing them down with
WD-40.

Considering how longlasting and popular the 465 is,that's not a very smart
sentence.The same HF and LF cam switches were also used in the high-
performance 7000 series lab scopes.

Just sayin', is all. No disrespect intended.

-- jm

Same here.

--
Jim Yanik
jyanik-at-kua.net

 

[Joel Kolstad]

"Frithiof Andreas Jensen" <frithiof.jensen@diespammerdie.jensen.tdcadsl.dk>
wrote in message news:41c99ca1$0$12077$edfadb0f@dread14.news.tele.dk...

I just bough a DVD-player for one of the children - DKK 339 - or about USD
60 at today's price.

Here in the US, cheap DVD players are typically found in stores for $30-$40.
$35 is easily obtainable during holiday sales without the need for rebates
or other gimmicks.

Did the Chinese manufacturer make a profit - naah, don't think so.!

Sure they did, it was just miniscule but they sold ten million of the
things...

 

[Winfield Hill]

Jim Thompson wrote...

[I'm so old I can remember when the spacing between seats was large
enough that you could shove the tray for and aft to adjust to your
comfort, and you could actually open a laptop all the way :-]

Hrrumph! That was so long ago they either didn't have laptops, or
the laptops had rather small screens and fit better on the tray.


--
Thanks,
- Win

 

[Ian Stirling]

Joel Kolstad <JKolstad71HatesSpam@yahoo.com> wrote:

"Ian Stirling" <root@mauve.demon.co.uk> wrote in message
news:41c877d8$0$45370$ed2619ec@ptn-nntp-reader03.plus.net...
Sure - You can also pop down the shop and buy a Power Meter which plugs
into

And have the added fun of being several hundred percent out on some
loads.

If it's as accurate as his electric company's power meter, he's probably
going to be happy!

Electric company power meters are much, much more accurate in general.
The cheap 'plug in' digital meters may be inaccurate as at least
some of them simply don't sample fast enough, and can get confused by
unexpectedly shaped waveforms.

All of them will be nearly accurate on things like heaters and motors.
However, for some switch-mode power supplies, they fail badly.

 

[Steve Hayes]

On 17 Dec 2004 20:21:32 GMT, Dave Hinz <DaveHinz@spamcop.net> wrote:

On Fri, 17 Dec 2004 09:20:17 -0500, Rich Heimlich <agrajag@comcast.net> wrote:
I just found out that, due to a misspelling I got from a cemetary that
I've now created about 50 entries with the last name misspelled. Is
there an easy way to change "McKibbon" to "McKibbin" in Legacy?

It's an Access database format, can you save, do a global search/replace
in Access, and then open it back up in Legacy?

Dave "I have a forest of Black Walnut, is that close?" Hinz

It's easier than that - check Rich's solution.


--
Steve Hayes
E-mail: hayesmstw@hotmail.com (see web page if it doesn't work)
Web: http://www.geocities.com/Athens/7734/stevesig.htm
http://www.geocities.com/Athens/7783/

 

[Roy Lewallen]

If there's any disagreement between what I say and what Jim says about
maintaining Tek scopes, listen to Jim and not me. He was there in the
trenches; I wasn't.

Roy Lewallen, W7EL

Jim Yanik wrote:

I worked for TEK for 21.5 years as a service tech in 2 of their field
offices;repaired and cal'd a lot of scopes and other TEK products.
. . .

 

[Lou Pecora]

In article <fnhyd.9792$Z47.6582@newsread2.news.atl.earthlink.net>,
"Nicholas O. Lindan" <see@sig.com> wrote:

OK, I'll buy that. But, to my understanding, a chaotic system is also
bounded.
Does the presence of the positive Lypunaov exponent(s) guarantee bounds?

No, you also need boundedness. The actual definition is more rigorous
than what I gave. I concentrated on local divergences.

-- Lou Pecora (my views are my own)

 

[Bob Stephens]

On Wed, 22 Dec 2004 14:55:03 -0500, BFoelsch wrote:

So I gave away the 465 and bought a TDS2012. Took a little getting used to,
but I've never looked back. Still have the old reliable 547 and a whole slew
of plug-ins in the corner, but they are going to need a new home before too
long.

Tek won't fix the 2012 either