Driver to drive?

<calcerise@hotmail.com> wrote in message
news:1105418183.224771.81960@f14g2000cwb.googlegroups.com

Just as Jack Mormons are untempleworthy and aircraft can be
unairworthy, a PC is unbenchworthy when used as a source or a
demodulator of audio for test and measurement purposes.
OK, that's your opinion, Cal. So far your posts have been full of holes
like Swiss Cheese if not Muenster. Let's see if you have the facts to back
this one up.

For one thing, the drives and power and reset buttons are on the front
whereas the sound card, usually the I/O in this application, is either
a PCI card in the back or on the motherboard.
Wrong. The audio interface can be wherever you want it to be, its just a
matter of picking the physical configuration you want. Obviously Cal doesn't
know about audio interfaces at all, even common ones like a Delta 1010 seem
to have eluded his fractional-second technical *study*.

Obviously Cal, you are not well-informed about audio interfaces or PCs.

The input and output are by a couple of sub-mini phono jacks.
Wrong, Audio interfaces are available with a variety of common audio input
and output connections including XLR, TRS, and RCA.

This alone makes it unbenchworthy. But these problems can be addressed
by DIY measures. The fact is that others, however, cannot.

The PC has a low-priced, noisy switchmode supply and a usually total
lack of RF shielding internally.
Wrong. In fact PC power supplies are as a rule built inside shielded steel
or aluminum boxes with some kind of RF bypassing on all of the inputs and
outputs.

While not audible, the noise level
can and will be induced in cabling to the DUT, the DUT itself, and
everywhere else.
Wrong. In fact some of the quietest audio interfaces that exist have their
circuitry entirely inside the PC, on a PCI card.

The PC soundcard is an entertainment grade, AC-coupled, single ended
affair.
Wrong, computer audio interfaces are widely used for audio production and
professional audio purposes. They are widely availble with true balanced
input and output connections. While audio interfaces are typically
AC-coupled, so is virtually every other piece of audio production equipment
on the market today.

PCI cards with more sophisticated, instrument grade design do
exist-however they are often quite expensive.
You want quality audio? You pay for it. True for computer audio interfaces
as well.

Serious cards designed for legit T&M work, usually CompactPCI, PXI, or
VME/VXI, are
astonishingly expensive.
You still want quality audio? You still pay for it. Still true for computer
audio interfaces as well.

As are their host backplanes, enclosures, and
CPU cards (although old VMEbus stuff can usually be found and the
appropriate software compiled for the OS you wind up running.)
Actually, there's a wide variety of computer PCI cards on the market that
are used for test and measurement purposes.

There are PC PCI oscilloscopes, spectrum analyzers, and arbs which
provide their own shielded and filtered micro-environment, but not
only they no cheaper than a standalone piece of test equipment, the
host PC still has all of the above disadvantages.
You forgot the part where these supposedly unsuitable products are widely
used and have excellent performance.

In short, PC-based test sucks for hobbyists, technicians, and
educators.
Right now its a two-option feasibility study. You buy an Audio Precision
System Two for $10K (used) -$25K and up (new), or you pop a $850 LynxTWO
into a $500 PC and run Audition ($300) and Spectra Lab ($800) software on it
for a total of about $2500 brand new. BTW the prices I'm quoting are highly
approximate, YMMV.

Finally, there are some problems with PCs + sound cards as test equipment
that weren't covered in Cal's post, and as soon as Cal admits this post of
his is like totally wrong, I'll tell what they are.

It's probably OK for ATE installations, usually they go
with the aforementioned PXI or VXI for good measure and inflate the
budget anyway.
BS.
 
On Mon, 10 Jan 2005 08:03:46 -0700,
Jim Thompson <thegreatone@example.com> wrote
in Msg. <6965u0h1gca0f1udnig7v5qdtou310os2f@4ax.com>

You can certainly tell the quality of the newspapers you read.
Whoch ones would you recommend? Which of my facts do yours not agree with?

--Daniel
 
In article <41e3a93e$0$14609$ed2619ec@ptn-nntp-reader01.plus.net>,
root@mauve.demon.co.uk says...
John Woodgate <jmw@jmwa.demon.contraspam.yuk> wrote:
I read in sci.electronics.design that Ian Stirling
root@mauve.demon.co.uk> wrote (in <41e2eb3b$0$71950$ed2e19e4@ptn-nntp-
reader04.plus.net>) about 'CNN's top 25 innovations', on Mon, 10 Jan
2005:
There was little
innovative about HTML.

Wordwise, the most popular word-processor for the BBC Micro, used a
similar 'tag' system to HTML, to do primitive formatting and to pass
control codes to the dot-matrix printer, and I don't suppose that
Wordwise was the first app to do so.

Tex comes to mind, which was written in 1978, there may well be earlier ones.
Markup languages were old hat by the time HTML came along.
Yep. IBM used "Script" and GML for all their publications (second only
to the US government for killing trees) long before '80.

--
Keith
 
I read in sci.electronics.design that markzoom@digiverse.net wrote (in
<1105443380.773397.95490@f14g2000cwb.googlegroups.com>) about 'Quick
power supply question', on Tue, 11 Jan 2005:
Maybe the secretary of IEC SC3C should make his dictats easily findable
and easily readable on search engines or he'll just get ignored...
He did at one time; he set up a free database on his university
computer, but the IEC found that it was affecting sales of IEC 60417 so
it had to be discontinued.
I
haven't even come across an electronics book that actually tells you
what that symbol really means.
Publishing such a book would raise serious copyright issues, of course,
if it were comprehensive, but I suspect IEC would allow a modest
selection to be published without an exorbitant license fee. You can get
PD 6578:1995 from British Standards, but it's costly and if you want it,
be quick, because it's proposed for withdrawal. It has the advantage
that the symbols are not superimposed on a grid.
--
Regards, John Woodgate, OOO - Own Opinions Only.
The good news is that nothing is compulsory.
The bad news is that everything is prohibited.
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk
 
On 11 Jan 2005 13:48:30 GMT, Daniel Haude
<haude@kir.physnet.uni-hamburg.de> wrote:

On Mon, 10 Jan 2005 08:03:46 -0700,
Jim Thompson <thegreatone@example.com> wrote
in Msg. <6965u0h1gca0f1udnig7v5qdtou310os2f@4ax.com

You can certainly tell the quality of the newspapers you read.

Whoch ones would you recommend? Which of my facts do yours not agree with?

--Daniel
Quoting Daniel,

"Your government is just too damn stupid. Who would dare to cooperate
with a bunch of erratically lying lunatics lead by a ex-drug
addict..."

Ex-drug addict? Where in the hell did you get that hare-brained idea?
"W" had a drinking problem, recognized it at an early age, and quit
drinking altogether.

...."converted to religious fundamentalism? One government that did so
was already voted out of office (Spain), let's see who follows."

The people of Spain are yellow, plain and simple. Throw a bomb and
they fold.

Throw us a bomb and we just get mad... we don't cower like EuroPeons.

I think the main reason we haven't seen another terrorist act in the
USA is that the terrorists know full well that the result would be the
whole USA becoming a cohesive (and killer) unit. Think WWII.

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.
 
Ianae wrote:
On Tue, 11 Jan 2005 02:07:14 -0700, Ben Cohn wrote
(in article <1105434434.531561.15680@f14g2000cwb.googlegroups.com>):


Guy Macon wrote:

The Phantom wrote:

(Concening things that grow in ultrapure water that has nothing but
pureH20 down to the perts per billion level)


But isn't it going to need something in addition to manganese (such
as carbon) to live? Where does it get the carbon? One of the sites

I

looked at suggested they might get carbon from the dead carcasses of
other organisms present. But this can't go on forever can it? And
with so few of them present, what is the probability that a

bacterium

that needs carbon is going to make contact with another (dead)
organism? This is all very strange.

It is indeed. When it comes to biology I am a pretty good electrical
engineer, but I have seen with my own eyes the slime that lives on
stainless steel in ultrapure waterand I have seen the slow-growing
filaments that can grow in ultrapure water in a polypropylene

container.

Life manages to find a way.

--
Guy Macon <http://www.guymacon.com/


I think it would be relevant to point out that biofilms (which, I
believe, the slimes you are referring to are) often have emergent
qualities unobserved in individual cells. Usually, they need some
obvious source of nutrients, but there could be nutrient sources we
overlook in conditions such as this.



Yes, this is a classic biofilm, although I also have no idea what sustains it
under these conditions.
Eating the polypropylene? Have you tried in a glass, or quartz,
container?

My "academic grandfather", Prof. Breyer (of ac polarography fame)
once told me that he had seen stuff grow in a solution of HgCl2.
Life, as you say, will find a way.

--
Dieter Britz, Kemisk Institut, Aarhus Universitet, Danmark.
 
On 10 Jan 2005 20:53:15 GMT, Ian Stirling <root@mauve.demon.co.uk>
wrote:

Ben Bradley <ben_nospam_bradley@mindspring.com> wrote:
On Sat, 08 Jan 2005 21:42:46 GMT, nico@puntnl.niks (Nico Coesel)
wrote:

Winfield Hill <hill_a@t_rowland-dotties-harvard-dot.s-edu> wrote:

http://www.cnn.com/2005/TECH/01/03/cnn25.top25.innovations

CNN's list of the top 25 innovations of the last 25 years.

2. Cell phone
25. Short Range, High Frequency Radio

The number one innovation will be announced on Sunday, January 16,
at 8 p.m. ET. What do you think it is?

Internet (which, IIRC, was invented longer ago than 25 years).

The World Wide Web and web browser, which made the Internet a
point-and-click app instead of command-line driven (and Unix based)
was started circa 1990.

Point and click had been around a while by then.
Gofer was for a fair while a lot bigger than the web.
Basically the web - in text.
Gofer was essentially as easy to use as the web. (of the time)
There was little innovative about HTML.

There was nothing really to stop gofer adding images before HTML
came out, and overtaking it.

I'd say that the web is half, or maybe a quarter of the whole, the
rest is the search engine.
Gopher is still alive and well. There's a bunch of die-hards out there
trying to revive it.

gopher://gopher.quux.org:70/1/Software/Gopher/servers
gopher://gopher.quux.org:70/0/Software/Gopher/whygopher/gopher-manifesto.txt

- YD.

--
Remove HAT if replying by mail.
 
I read in sci.electronics.design that Dieter Britz <britz@chem.au.dk>
wrote (in <cs0puv$4o8$1@news.net.uni-c.dk>) about 'Guy Macon's
adventures with ultrapure water', on Tue, 11 Jan 2005:

Eating the polypropylene?
That would get it carbon, hydrogen and oxygen. It's one strange life-
form if it doesn't need any nitrogen, phosphorus and sulfur.

Have you tried in a glass, or quartz,
container?
Silicon-burgers! Yum!
My "academic grandfather", Prof. Breyer (of ac polarography fame)
once told me that he had seen stuff grow in a solution of HgCl2.
Obviously alien invaders .... from Mercury! (Assuming no-one had
sprinkled zinc powder into it!)

Life, as you say, will find a way.
It seems so.
--
Regards, John Woodgate, OOO - Own Opinions Only.
The good news is that nothing is compulsory.
The bad news is that everything is prohibited.
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk
 
Dieter Britz wrote:
Ianae wrote:

Yes, this is a classic biofilm, although I also have no
idea what sustains it under these conditions.

Eating the polypropylene? Have you tried in a glass, or quartz,
container?
In my experience, the slime grows on stainless steel. and the
white filaments grow in the water contained in polypropylene.

Glass is unsuitable for holding ultrapure water. It dissolves
into the water. I have heard that Quartz is better, but I have
never seen it in actual use.
 
On Mon, 10 Jan 2005 22:09:46 -0600, "Rhyanon" <pissoff@uberbitch.com>
wrote:

Look, I yanked the dweebs into replying again, bahahahahahha!!! What
fuckless mow - rons.....
---
If you expect silence in response to stupidity, then you have a deaf
wish.

--
John Fields
 
"Don Lancaster" <don@tinaja.com> wrote in message
news:41E33228.B50FBEB5@tinaja.com...
Don Lancaster wrote:



There's a sneaky trick that lets you individually control 56 LED's from
one 8-bit port with ZERO external hardware.

See http://www.tinaja.com/glib/muse153.pdf for details.

--
Many thanks,

Don Lancaster

And, if you are only going to light a few of the LED's at once, you can
individually control 132 LED's from 12 port lines or 240 LED's from 16
port lines.

Again, with ZERO external hardware.

--
Hello Don...

Thanks for providing info, however I cannot find the trick you refer to (56
leds, 8 bits) in the reference
you provided. Is it there?

Regards

Eric Pearson
 
Some dufus wrote:
Life _is_ Freedom.
I'm lining out -freedom- and replacing it with _life_ in all the written works I
come across. I'll be sure to correct everyone in conversation too.
 
"Randy McLaughlin" <randy@nospam.com> wrote in message
news:FUUEd.2518$Hi.187@bignews4.bellsouth.net...
"John Fields" <jfields@austininstruments.com> wrote in message
news:4g28u0hp58rjkcit2fi569pollmu326asv@4ax.com...
On Mon, 10 Jan 2005 22:09:46 -0600, "Rhyanon" <pissoff@uberbitch.com
wrote:

Look, I yanked the dweebs into replying again, bahahahahahha!!! What
fuckless mow - rons.....

---
If you expect silence in response to stupidity, then you have a deaf
wish.

--
John Fields


Please do not cross post.
I've a legitimate question.

Are you a bot?

-blu


 
"Rhyanon" <pissoff@uberbitch.com> wrote in message
news:10u6keph39vc3f7@corp.supernews.com...
"blu" <blu682@notarealaddress.com> wrote in message
news:fk3Ed.9528$b23.8729@bignews1.bellsouth.net...

"Randy McLaughlin" <randy@nospam.com> wrote in message
news:%w_Dd.1998$vM4.1854@bignews3.bellsouth.net...
"John Fields" <jfields@austininstruments.com> wrote in message
news:d6t0u0h90knnn87r1f87tig2m3am6gjoq0@4ax.com...
On Sat, 8 Jan 2005 08:11:34 -0600, "Rhyanon" <pissoff@uberbitch.com
wrote:

Hah, I am mightee.

---
Mightee fucking stupid...

--
John Fields

Please to cross posting.

Why... thank you!
It's wunnerful to have an invitation.

=blu=


Makes ya feel all warm and fuzzay, eh?
So *that's* what that feeling was. I thought I'd put my slippers on while
they were still damp.

'-)

blu


 
Do you have a reason to use solid state vs
an electromechanical relay?
If you just want to turn on/off once in a while, mechanical is the
lower cost method. If you want higher on/off cycles (flashing lights)
or a relay that is unaffected by vibration and shock, then a solid
state relay like a http://www.power-io.com/products/hdd.htm
or other dc solid state relays would work fine.
 
On Tue, 11 Jan 2005 20:08:53 +0100, "Frank Bemelman"
<f.bemelmanq@xs4all.invalid.nl> wrote:

http://www.machinadynamica.com/machina27.htm

Get one while stock lasts...
What a joke.

Just on a whim I took a stab at

http://www.machinadynamica.com/machina28.htm

There is probably more



Regards,

Boris Mohar

Got Knock? - see:
Viatrack Printed Circuit Designs (among other things) http://www.viatrack.ca
 
markzoom@digiverse.net wrote:
LOL. Yes, the dotted line should be below the solid one unless you're
in Oz....

I wish the people who dreamt up all these marvellous standards would
include a symbol that tells you if a supply is regulated or not
without taking it apart.
I just bought a batch of 10 used 18" tft displays (Ł7 or $11 each! )
and need to obtain/make cheap 24V 2.5A power supplies for the working
ones. I think they'll end up costing more than the displays....
Mark
Here's a 24V/6.5A switching supply for $34.75:
http://www.allelectronics.com/cgi-bin/category.cgi?&item=PS-2465


-- "To deny our impulses... foolish; to revel in them, chaos." MCJ 200308
 
On Tue, 11 Jan 2005 20:08:53 +0100, "Frank Bemelman"
<f.bemelmanq@xs4all.invalid.nl> wrote:

http://www.machinadynamica.com/machina27.htm

Get one while stock lasts...
Damn! I must have missed out on the "dishonesty gene" when they were passing
them out.

Back in the 1970's, there was a company passing out one-penny capacitors (sold
as a "device") for $30 each that would "fix your TV reception" permanently.
Money back guarantee, too! At least, in their case, they had you fiddling with
the back of the TV antenna system to install it, so that if there *were* any
loose wires you hadn't been paying attention to, they'd get tightened and your
reception really might improve some.

I need to get a new conscience. The one I got right now is Walt Disney's Jiminy
Cricket, I think.

Jon
 
tech-guy Jan 11, 2005
Do you really think this dude is still hanging around
looking for a solution to his problem?
Before posting to Google Groups.
learn a little about Usenet.
 

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