EAGLE Netlist conversion

amdx · Jan 26, 2013

You really are pretty torqued about this, aren't you?

Cheers

Phil Hobbs

Perhaps! I'm thinking of writing a book, "America's Worst
Engineering" and quoting from this public forum... citing names along
with the examples

The "bootstrap", as presented, works only with a capacitive sensor and
is crap otherwise.

Here's some, IMHO, relevant info the OP wrote, which seems to go agree
with your last line.

The input impedance doesn't matter--the input
source is a low-impedance highly capacitive transducer.
____________________________________________________________
It has nothing to do with gyrators, feedback, etc. Those all totally
miss the boat.
______________________________________________________________________
As far as the original problem which inspired this--which is entirely
irrelevant to the thread, and which was never going to use this ckt
anyhow--all I wanted was a spike out when the transducer got pinged.
____________________________________________________________________
That wasn't my assumption; I assumed a capacitive, low-impedance
source.
___________________________________________________________________
freq as spec'd in the drawings and all the results--40KHz. Source
impedance WAG'd @ 10nF, e.s.r. unknown (believed < 100r).

****************************************************************

I looked at about seven 40khz transducers they were all ~2000pf.
10nf seems high???
Mikek

Jim Thompson · Jan 26, 2013

On Sat, 26 Jan 2013 15:50:57 -0600, amdx <amdx@knologynotthis.net>
wrote:

You really are pretty torqued about this, aren't you?

Cheers

Phil Hobbs

Perhaps! I'm thinking of writing a book, "America's Worst
Engineering" and quoting from this public forum... citing names along
with the examples

The "bootstrap", as presented, works only with a capacitive sensor and
is crap otherwise.

Here's some, IMHO, relevant info the OP wrote, which seems to go agree
with your last line.

The input impedance doesn't matter--the input
source is a low-impedance highly capacitive transducer.

I so noted that when flipper was pontificating.

____________________________________________________________
It has nothing to do with gyrators, feedback, etc. Those all totally
miss the boat.

Except it doesn't. I've plainly shown that the "bootstrap" is a
gyrator-created inductance.

Then someone threw up another style of gyrator that wasn't as good.

______________________________________________________________________
As far as the original problem which inspired this--which is entirely
irrelevant to the thread, and which was never going to use this ckt
anyhow--all I wanted was a spike out when the transducer got pinged.

Fit's with my resonance" comments, doesn't it?

____________________________________________________________________
That wasn't my assumption; I assumed a capacitive, low-impedance
source.

And I agreed. Capacitor with signal as a current source... since
vindicated by Leach's paper.

___________________________________________________________________
freq as spec'd in the drawings and all the results--40KHz. Source
impedance WAG'd @ 10nF, e.s.r. unknown (believed < 100r).

****************************************************************

I looked at about seven 40khz transducers they were all ~2000pf.
10nf seems high???
Mikek

David Eather · Jan 26, 2013

On Sun, 27 Jan 2013 03:18:52 +1000, Jim Thompson
<To-Email-Use-The-Envelope-Icon@on-my-web-site.com> wrote:

What are these nodes?

http://tinyurl.com/bjxndpg

...Jim Thompson

Isn't the thevein equivalent of what those nodes are connected to a short
circuit?

Jim Thompson · Jan 26, 2013

On Sun, 27 Jan 2013 08:56:08 +1000, "David Eather" <eather@tpg.com.au>
wrote:

On Sun, 27 Jan 2013 03:18:52 +1000, Jim Thompson
To-Email-Use-The-Envelope-Icon@on-my-web-site.com> wrote:

What are these nodes?

http://tinyurl.com/bjxndpg

...Jim Thompson

Isn't the thevein equivalent of what those nodes are connected to a short
circuit?

David Eather · Jan 26, 2013

On Sun, 27 Jan 2013 09:01:56 +1000, Jim Thompson
<To-Email-Use-The-Envelope-Icon@on-my-web-site.com> wrote:

On Sun, 27 Jan 2013 08:56:08 +1000, "David Eather" <eather@tpg.com.au
wrote:

On Sun, 27 Jan 2013 03:18:52 +1000, Jim Thompson
To-Email-Use-The-Envelope-Icon@on-my-web-site.com> wrote:

What are these nodes?

http://tinyurl.com/bjxndpg

...Jim Thompson

Isn't the thevein equivalent of what those nodes are connected to a
short
circuit?

I guess you might say that. What are they "shorted" TO?

In an AC analysis, all _FIXED_ voltage sources are presumed ZERO.

...Jim Thompson

If you stick thevein in then it is clearly shorted to gnd so it must be
equivalent to zero

Jim Thompson · Jan 26, 2013

On Sun, 27 Jan 2013 09:16:54 +1000, "David Eather" <eather@tpg.com.au>
wrote:

On Sun, 27 Jan 2013 09:01:56 +1000, Jim Thompson
To-Email-Use-The-Envelope-Icon@on-my-web-site.com> wrote:

On Sun, 27 Jan 2013 08:56:08 +1000, "David Eather" <eather@tpg.com.au
wrote:

On Sun, 27 Jan 2013 03:18:52 +1000, Jim Thompson
To-Email-Use-The-Envelope-Icon@on-my-web-site.com> wrote:

What are these nodes?

http://tinyurl.com/bjxndpg

...Jim Thompson

Isn't the thevein equivalent of what those nodes are connected to a
short
circuit?

I guess you might say that. What are they "shorted" TO?

In an AC analysis, all _FIXED_ voltage sources are presumed ZERO.

...Jim Thompson

If you stick thevein in then it is clearly shorted to gnd so it must be
equivalent to zero

John Larkin · Jan 29, 2013

On Mon, 28 Jan 2013 20:41:49 -0500, "P E Schoen" <paul@peschoen.com> wrote:

"John Larkin" wrote in message
news:ua3eg8h93fpt3v8uu20hj2tfu7ejndkivm@4ax.com...

Probably that's her name. He's a leering old creep.

He'd probably go into dirty-old-man-drooling mode if he got an
email from Chastity or Prudence or Joy or Virginia. Wheeeeee!

JT does seem to be getting weirder as time continues to be unkind to his
sensibilities. It is very immature to make fun of someone's name, and
especially disturbing when it has puerile sexual connotations. This may be
more public evidence of an unstable mental state which may restrict his
privilege to own and play with firearms.

Paul

Age, like alcohol, is disinhibiting. Ones basic nature emerges, less constrained
by social norms and manners. An intelligent person can consciously compensate.

Or maybe he's just getting senile.

--

John Larkin Highland Technology Inc
www.highlandtechnology.com jlarkin at highlandtechnology dot com

Precision electronic instrumentation
Picosecond-resolution Digital Delay and Pulse generators
Custom timing and laser controllers
Photonics and fiberoptic TTL data links
VME analog, thermocouple, LVDT, synchro, tachometer
Multichannel arbitrary waveform generators

John Fields · Feb 1, 2013

On Thu, 31 Jan 2013 16:24:19 -0800, John Larkin
<jlarkin@highlandtechnology.com> wrote:

On Thu, 31 Jan 2013 18:03:40 -0600, John Fields
jfields@austininstruments.com> wrote:

On Thu, 31 Jan 2013 16:26:39 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:

"John Fields" <jfields@austininstruments.com> wrote in message
news:ihckg8p2vir22qkq8btvkr2vklg6jv797v@4ax.com...
On Tue, 29 Jan 2013 17:32:26 -0500, "Michael A. Terrell"
mike.terrell@earthlink.net> wrote:

Ian Field wrote:

.................................. and JT is a dirty old man!

Sounds like you're jealous. Don't the Viaga & Cialis cocktails help
you enough?

---
Being a catcher, he has no need for Viagra or Cialis, but I'm sure
"cock" and "tails" has meaning for him.

--
JF

You really ought to stop projecting your own deviancy on others and seek
professional help!

---
My being able to understand that you like the feel of a cock up your
ass doesn't imply my participation in the deed.

Confirmation!

---
So you agree with my assessment of his condition?
---

You really have a thing for those sorts of acts.

---
Aberrant behavior is always interesting to study and comment on,
but that interest no more ties a writer commenting on butt-fucking to
RL buggery than writing about serial killers ties him to RL murder.
---

There are better newsgroups for those enthusiasms.

---
I have no knowledge of them, while you claim to, so I must admit that,
on that plane, you're more knowledgeable than am I.

--
JF

John Fields · Feb 1, 2013

On Fri, 1 Feb 2013 16:35:31 -0000, "Ian Field"
<gangprobing.alien@ntlworld.com> wrote:

"John Larkin" <jlarkin@highlandtechnology.com> wrote in message
news:6m2mg85974t8vgv7j45g39ek83qu1gs3qe@4ax.com...
On Thu, 31 Jan 2013 18:03:40 -0600, John Fields
jfields@austininstruments.com> wrote:

On Thu, 31 Jan 2013 16:26:39 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:

"John Fields" <jfields@austininstruments.com> wrote in message
news:ihckg8p2vir22qkq8btvkr2vklg6jv797v@4ax.com...
On Tue, 29 Jan 2013 17:32:26 -0500, "Michael A. Terrell"
mike.terrell@earthlink.net> wrote:

Ian Field wrote:

.................................. and JT is a dirty old man!

Sounds like you're jealous. Don't the Viaga & Cialis cocktails help
you enough?

---
Being a catcher, he has no need for Viagra or Cialis, but I'm sure
"cock" and "tails" has meaning for him.

--
JF

You really ought to stop projecting your own deviancy on others and seek
professional help!

---
My being able to understand that you like the feel of a cock up your
ass doesn't imply my participation in the deed.

Confirmation!

You really have a thing for those sorts of acts. There are better
newsgroups for those enthusiasms.

.................but he'd much rather preach his filth on this one!!!

---
Oh, please...

Stop playing Pearl Pureheart and check your posting record; especially
on abse where you often post penile-related pictures accompanied by
cutesy dialog.

Not that there's anything wrong with that, Kramer....

--
JF

John Larkin · Feb 1, 2013

On Fri, 01 Feb 2013 15:50:15 -0600, John Fields
<jfields@austininstruments.com> wrote:

On Thu, 31 Jan 2013 16:24:19 -0800, John Larkin
jlarkin@highlandtechnology.com> wrote:

On Thu, 31 Jan 2013 18:03:40 -0600, John Fields
jfields@austininstruments.com> wrote:

On Thu, 31 Jan 2013 16:26:39 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:

"John Fields" <jfields@austininstruments.com> wrote in message
news:ihckg8p2vir22qkq8btvkr2vklg6jv797v@4ax.com...
On Tue, 29 Jan 2013 17:32:26 -0500, "Michael A. Terrell"
mike.terrell@earthlink.net> wrote:

Ian Field wrote:

.................................. and JT is a dirty old man!

Sounds like you're jealous. Don't the Viaga & Cialis cocktails help
you enough?

---
Being a catcher, he has no need for Viagra or Cialis, but I'm sure
"cock" and "tails" has meaning for him.

--
JF

You really ought to stop projecting your own deviancy on others and seek
professional help!

---
My being able to understand that you like the feel of a cock up your
ass doesn't imply my participation in the deed.

Confirmation!

---
So you agree with my assessment of his condition?

No, you confirmed your compulsions.

---

You really have a thing for those sorts of acts.

---
Aberrant behavior is always interesting to study and comment on,
but that interest no more ties a writer commenting on butt-fucking to
RL buggery than writing about serial killers ties him to RL murder.

It's a recurring theme with you. It's not on-topic here.

---

There are better newsgroups for those enthusiasms.

---
I have no knowledge of them, while you claim to, so I must admit that,
on that plane, you're more knowledgeable than am I.

You keep mentioning these acts, often graphically. I don't.

--

John Larkin Highland Technology, Inc

jlarkin at highlandtechnology dot com
http://www.highlandtechnology.com

Precision electronic instrumentation
Picosecond-resolution Digital Delay and Pulse generators
Custom laser drivers and controllers
Photonics and fiberoptic TTL data links
VME thermocouple, LVDT, synchro acquisition and simulation

Feb 3, 2013

On Sat, 2 Feb 2013 18:36:20 -0800 (PST), Bill Bowden
<bperryb@bowdenshobbycircuits.info> wrote:

On Jan 24, 7:51 pm, k...@attt.bizz wrote:
On Thu, 24 Jan 2013 17:53:17 -0800 (PST), Bill Bowden

Again, you're confusing wealth and money. The value of the
houses
hasn't fallen because you can now accommodate another family to
harvest trees and cut lumber. If the number of people is constant,
then you've built the equivalent of an empty hole, and filled it in.
You must be Obama! ;-)

Still confusing. If the number of people increases and a young couple
wants to move out of their parent's house into their own house, and do
all the labor to build it, the value of other houses decreases. How
does the system increase the paper money supply to keep prices
constant?

Again, you're confusing money and wealth. You have another home and a
family to live in it so the value of the other homes doesn't go down.
The market is still stable. You've created wealth because you have
another home (value) and another worker. Money is a completely
different issue.

If it were a gold economy, and you could reliably recover an ounce of
gold a day, many members of the community would simply pan for gold,
which would drive prices up for other things, since nobody wants to do
anything, other than pan for gold and drink beer.

Who is brewing the beer in your perfect world?

How does the local fed deal with that problem?

The "local fed" loans money to buy the labor to build the house, that
the new family will pay off over their lifetime, with their labor (if
all goes well

Yes, I understand the standard explanation. But I still miss the point
of where the new created money ends up.

You scenario didn't create any "money", though it did create wealth.
No bank was involved and, in fact, no money even changed hands.

If the bank is the local fed,
and they make a loan to the new family by printing money they don't
have, who has title to the new printed money when it is payed back to
the bank?

The fed.

It would seem the bank's function is to simply manage the
loan and collect interest for their efforts. But since the bank is
slowly collecting the original principal created, the bank has now
increased their assets by adding the repayed loan to their books.

No, the repaid loan is of no value. The interest paid on the loan,
minus costs, is (or was) of value, sure.

You say the scenario didn't create any new money, yet the interest
minus costs on the loan created new value. How does this increase the
money supply when there are the same number of dollars in circulation
as before? And the fed printing money is not the answer, since there
is no fed, only the single bank in the simple scenario.

Of course it didn't create any new money because that was one of your
story's constraints. You can't specify that no new money is possible
and then wonder why none exists. Well, maybe you can...

passerby · Feb 5, 2013

responding to
http://www.electrondepot.com/cad/i-d-guess-that-ny-state-will-ban-3d-printers-27765-.htm
, passerby wrote:

jeffl wrote:

Home gun fabrication is nothing new. Anyone with a knowledge of lost
wax casting, powder metallurgy, or foundry techniques can cast weapon
parts. Same with anyone that has access to numerical control machines
or a small hydraulic stamping press.

Add to this list access to 3D printers and knowledge of 3D file formats and it
sounds less and less like a "feel depressed->grab a gun->walk into a school"
type of person. If you went through all this trouble and spent all that money
and time to learn all this, you will cherish the gun as an art piece (which is
what it will be in this case). You would never do anything crazy with it and
even then, it would probably jam on the second round. Well, maybe not if
you're good at it, but if I were a public official with limited funds trying
to do something meaningful with what's available, I would not even bother with
DIYs.

What worries me is
that 3D printing now allows anyone to make creative adaptations, such
as Gyrojet clones, pocket rockets, small rail guns, guided
projectiles, and other non-conventional weapons that don't require
high strength meterials. The only reason such alternative weapons
have not become popular is that currently cheap and available
ammunition makes them economically unattractive.

Same thing applies to non-conventional weapons: you would be so friken proud
of what you've done that you would much rather post an Instructable about it
than do anything so stupid with it. There was already a 3W (or more-can't
remember exactly) handheld laser gun made by a DIYer and then posted about
with enough detail to build one yourself. But you should not worry too much
about anyone walking into a school and starting to blind pre-schoolers with it
- it costs too much and by the time you are done building it, you would love
the thing so much, your next step would be to build an acrylic display for it.
Yeah, you'd fire it a few times and pop some balloons with it, perhaps even
filled with hydroxy mix

but you'd do it in a controlled and safe
environment. One or two (dozens?) successful firings would be enough to
satisfy an engineer's curiosity and into the acrylic display it goes...

Please fasten your seat belts. The road ahead is going to be a rough
ride.

Why? Supposedly, you'd be able to print bullet-proof vests, too. Why not?

Cheers!

--

Phil Hobbs · Feb 8, 2013

On 2/7/2013 5:40 AM, Martin Brown wrote:

On 06/02/2013 17:42, Phil Hobbs wrote:

You can often use it to derive a perturbation series for those times
when linearizing isn't quite enough.

I highly recommend Bender & Orszag's "Advanced Mathematical Methods for
Scientists and Engineers", which has all that sort of stuff--boundary
layer theory, steepest descents, and a whole lot of other asymptotic
methods. Arfken's applied math book is good as well--it used to be the
standard textbook for physics undergraduates.

Our local choice was Matthews & Walker Mathematical Methods of Physics.

It's often possible to derive a series solution, which may or may not
converge, and then convert to a continued fraction or apply convergence
tricks such as Shanks's algorithm or Richardson extrapolation. When
those work, which isn't always, they can be practically supernatural.

Always used to be popular with the turbulent flow brigade - often gave
divergent power series that could only be tamed with Shank's. The pure
mathematicians used to cringe at the abuse of method but they could not
deny that the results it predicted matched experimental data well!

Works best on alternating series with poor convergence or divergence!

I was once very interested in extended convergence tricks and have used
the rational approximation for Log(1+x) in anger several times.

Log(1+x) = x(6+x)/(6+4x) where -1/2 < x < 1

The other common one sometimes useful is

Sqrt(x) = (1+3x)/(3+x) where -1/2 < x < 2

Only really any good if you have fast hardware divide.

These tricks sometimes allow a rough polynomial approximation soluble
analytically to provide a much better initial input guess for more rapid
convergence of an iterative method like N-R.

Good stuff. Did you ever read Forman Acton's "Numerical Methods That
Work"?

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics

160 North State Road #203
Briarcliff Manor NY 10510 USA
+1 845 480 2058

hobbs at electrooptical dot net
http://electrooptical.net

Joe Chisolm · Feb 19, 2013

On Mon, 18 Feb 2013 19:17:40 -0800, Joerg wrote:

Folks,

Got a set of schematic/layout files from a client today in Altium
format. Unfortunately a newer version than 2009. Looked on the Altium
site whether they have a viewer for younger than 2009. Nope!

Couldn't believe it. Or did I miss something?

I would download and try the viewer. I had the 09 summer
release installed and was able to read files created by a 10 release.
You get some error messages but everything else was OK. I have
updated to release 10 now.

http://www.altium.com/community/downloads/downloads_home.cfm

or have them create a pdf for you. File->SmartPDF and also
send you the gerbers

--
Chisolm
Republic of Texas

rickman · Sep 2, 2013

On 9/1/2013 2:10 PM, Jim Thompson wrote:

On Sun, 01 Sep 2013 19:38:36 +0200, PeterG<xaccount@gmx.net> wrote:

Am 01.09.2013 18:13, schrieb Jim Thompson:
On Sun, 01 Sep 2013 17:24:16 +0200, PeterG<xaccount@gmx.net> wrote:

Am 29.08.2013 16:10, schrieb Robert Baer:
Nico Coesel wrote:

Some others also

IDIOT!
That would INCREASE murders and other crime.

In most other civilized states the posession of weapons is strictly
limited and not allowed for everyone. And in most other civilized states
the crime rates are much lower than in USA.

don´t repeat the dumb lies of the NRA, they seem to rule the USA.

Murder rates in the US are lowest in those states with little or no
gun control laws.

... and highest in those US states/cities with punitive levels of gun
control.

...Jim Thompson

Homicide rate (per hundred thousand,
http://en.wikipedia.org/wiki/Crime_in_the_United_States#Homicide):

Ireland 1.3
germany 0.9
Netherlands 1.0
Norway 0.5
UK 1.4
France 1.6
canada 1.73
USA 4.8

You see: That DOES NOT INCREASE murders and other crime - on the contrary!

You're dense as a rock. You're taking an ALL-USA number, when you
should be comparing state-by-state, or even city-by-city over here.

Chicago has the highest murder rate by gun... and the "toughest" gun
laws.

But, hey, come on over. I'll take you on a tour of the south side of
Chicago (or Detroit, if you like), then leave you there to find your
way out>:-]

Why do you have to call people names? You are interpreting a statistic
as if it proves your point and it doesn't. Which is cause and which is
effect? Perhaps the strong gun control laws are a *response* to the
high crime rate rather than the cause...?

http://xkcd.com/552/

Besides, the fact that there is variation within the US doesn't
invalidate his data. Do you understand his data? How much variation in
murder rates do you see between the strict gun control states and the
gun permissive states? Is it more than the 3x-4x difference seen
between the US and the countries Peter listed? 3x-4x is a *huge*
difference. But of course, it doesn't prove his point, it is
correlation, not causality.

--

Rick

defaullt · Nov 13, 2013

On Tue, 12 Nov 2013 17:42:57 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

On Tue, 12 Nov 2013 16:46:55 -0500, defaullt
defaulter_@defaulter.net> wrote:

On Tue, 12 Nov 2013 14:23:39 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

So much for the sermon.

My personal opinion, having studied the problem and having the
education to do so, is that the predominant opinion of the pretend
scientists is incorrect and global warming is a fraud perpetrated by
academia types who profit from the ongoing folderol.

and therein lies the problem - human greed, great for a tribal
society, certainly a good survival trait many years ago, but not the
best trait for a limited world and large populations.

If you are swayed by an emotional appeal, and your cite would seem to
indicate you are, you are easily manipulated.

That is not a good thing.

Face it - your post doesn't support your position. Mere folderol
intended to sway the gullible; and it makes you look bad too. Cite
some more rational empirical evidence if you want to make a point, not
some idiot politician.

Cut the shit. Run some energy numbers and come back and tell me
_facts_!

...Jim Thompson

If you feel that strongly perhaps there's a more appropriate forum for
your rants. Doubtless you could lock horns with someone above your
own expertise in climatology. The question is, do you want to know
the truth or do you want to cling to an opinion?

EAGLE Netlist conversion

amdx

Guest

Jim Thompson

Guest

David Eather

Guest

Jim Thompson

Guest

David Eather

Guest

Jim Thompson

Guest

John Larkin

Guest

John Fields

Guest

John Fields

Guest

John Larkin

Guest

Guest

passerby

Guest

Phil Hobbs

Guest

Joe Chisolm

Guest

rickman

Guest

defaullt

Guest

Welcome to EDABoard.com

Sponsor

Online statistics

Forum statistics

EAGLE Netlist conversion

amdx

Guest

Jim Thompson

Guest

David Eather

Guest

Jim Thompson

Guest

David Eather

Guest

Jim Thompson

Guest

John Larkin

Guest

John Fields

Guest

John Fields

Guest

John Larkin

Guest

Guest

passerby

Guest

Phil Hobbs

Guest

Joe Chisolm

Guest

rickman

Guest

defaullt

Guest

Log in

Welcome to EDABoard.com

Sponsor