Driver to drive?

[John Fields]

On Wed, 20 Oct 2004 01:04:55 GMT, "Clarence" <no@No.com> wrote:

"John Fields" <jfields@austininstruments.com> wrote in message
news:gbdbn0pthrcfn35csurdfsr9os2dt480id@4ax.com...
On Wed, 20 Oct 2004 00:09:36 GMT, "Clarence" <no@No.com> wrote:

As usual had nothing of value to contribute!

---
Same old "John Fields", huh, Clarence?

You started it, you can just live with it!

Go get your nap.... You need it pretty bad.

---
Getting winded, huh?

--
John Fields

 

[techdrive]

I've had electronic ideas too. When I was about 10 years old, in 1973, I
thought it would be super cool to put a recargeable battery into a drill.
Now manufacturers make millions a year on this idea, heck maybe millions a
day. When I was in chemistry in college, about 1982, I asked a prof: "If
water is made of 2 hydrogen atoms and an oxygen, What if you split the
bond and used the hydrogen as the fuel and the oxygen as the oxident or
catalyst and use it as a fuel source?" He told me that it would take more
energy to split the molecule then you would get in energy. Now there are
buses running around that use this very principle, it's called fuel cell
technology. So, to answer your question, If you have an electronic idea,
run with it and see where it takes you. Don't just forget about it because
someone tells you it won't work or it's a dumb idea. Take it from me,
someone else will run with it if you don't. -Mike

 

[Jonathan Kirwan]

On Tue, 26 Oct 2004 12:00:27 -0700, John Larkin
<jjlarkin@highSNIPlandTHIStechPLEASEnology.com> wrote:

http://www.cnn.com/2004/WORLD/meast/10/26/iraq.explosives/index.html

Thanks, interesting addition. I think the point remains that there are
different claims and that there simply hasn't been sufficient time for a clear
picture to arise (or, at least, settle out as being permanently unclear.)
Statements that assume either that we completely failed to do our job or
succeeded as well as was possible are premature, at this point.

Jon

 

[Rich Grise]

On Tue, 26 Oct 2004 08:25:21 +0000, Robert Baer wrote:

Rich Grise wrote:

I've decided I'm going to write a book. Screw it, I sit here
and claim I have a theory that explains everything, dammit,
I ought to have the hairs to put my mouth where my mouth is.

Now the big question, which will, of course, be everyone's
first objection: If I know everything, howcome I can't figure
out how to get money?

Well, I have an answer, and of course, from the POV of the
people who have the money, it sounds just like nothing but
more of the same whining from the people who don't have the
money.

The people who have the money will resist the theory because
it tells how the people without money can theoretically get
money, but the people with the money are terrified that if
they let loose of any of their money at all, it will all
be sucked up by the infinite abyss of the money hole, and
they will die horribly, a pauper in the streets like the
ones they're so desperately trying to avoid becoming in
their own right.

So, I guess I'll have to resort to the old-fashioned way,
of getting a job - although I would like to think that it's
within the realm of possibility within known reality that
I could find some employer who wants me for my mind instead
of just my body. ;-)

Or - one of the things of "magic" that so few people actually
try - to simply ask for some:

How does one go about getting an advance to write a book? I
am lazy, after all, and it does happen, and there might be
some eccentric out there, or it could be about as successful
as the left-handed microwave oven. Which, by the way, if
anybody takes that one to market, I'd appreciate a buck or
two thrown my way for thinking of it.

But, I'm certainly not going to sit here and wait for somebody
to show up with a check! I think I can handle "starving writer"
for awhile - actually, that's what I already am, because
if anyone were to look into it, my current "job title" (I'm
a contractor, so don't really have a title or anything, except
maybe "misc.") is "Tech Writer," and I'm poor, albeit not
literally starving.

And if worse came to worst, standing on the street with a sign
that says "Bum" pays about $15 bucks an hour. ;-)

So, off to the grindstone!

Cheers!
Rich

Well, if *everything* i know is wrong, then *maybe* something i do NOT
know might be right????

Right!

;-)
Rich

 

[Dbowey]

shoppa posted:
<< Frequency response is limited (seems to not go much above a few tens of kHz)
but is good enough for my playing around. >>

What is the shortest period (fastest sweep) shown on the horizontal time-base
switch of your scope?

Don

 

[Ian Stirling]

In sci.electronics.design yo <yotango@yahoo.com> wrote:

Hi,

I'm building a very low cost PC Oscilloscope. I have lots of spare
PC-100 SDRAM chips and would like to use them instead of buying FIFO.
I cannot use the computers memory via PCI because the PCI card cannot
guarantee memory access all the time. Therefore I would like to use
SDRAM in my circuit board.

I understand it's complex to use SDRAMS. I have an idea that could
simplify the job. Instead of having my circuit do all the
initializations, etc. to the SDRAM, why not do it through software on
the PC? Is this a good idea? I have no idea since I am not familiar
No.
with SDRAM. The software could have access to the pins of the SDRAM.

So, get familiar.

Google for datasheets on SDRAM chips.
You can't generally throw more than a few dozen bytes at the SDRAM
before doing something.

 

[John Larkin]

On Tue, 26 Oct 2004 19:53:06 GMT, Jonathan Kirwan
<jkirwan@easystreet.com> wrote:

On Tue, 26 Oct 2004 12:00:27 -0700, John Larkin
jjlarkin@highSNIPlandTHIStechPLEASEnology.com> wrote:

http://www.cnn.com/2004/WORLD/meast/10/26/iraq.explosives/index.html

Thanks, interesting addition. I think the point remains that there are
different claims and that there simply hasn't been sufficient time for a clear
picture to arise (or, at least, settle out as being permanently unclear.)
Statements that assume either that we completely failed to do our job or
succeeded as well as was possible are premature, at this point.

Jon

But that doesn't stop the press, or the campaigns, from going
ballistic in milliseconds.

John

 

[Jim Thompson]

On 20 Oct 2004 16:20:45 GMT, chrisgibbogibson@aol.com
(ChrisGibboGibson) wrote:

Jim Thompson wrote:


On 20 Oct 2004 15:57:56 GMT, chrisgibbogibson@aol.com
(ChrisGibboGibson) wrote:

Joerg wrote:

Hello Folks,

Just wondering: Are there any low cost small transistors that have the
baker clamp (saturation protection) built in?


Is there some reason you can't just bung a schottky in there ?

Gibbo

The only reason for using a Schottky, or Baker clamp (not quite the
same), is to prevent saturation-based storage time.


I think a baker clamp was simply a way to achieve the same results before
schottkys were available

At least where I come from they are referred to interchangably but yes,
technically they are different.

Just use a gold-doped device, such as 2N2369, for the same effect.


Are they really as fast at turn off?

Gibbo

See http://www.pci-card.com/2n2369.pdf

Says 30ns turn-off time.

Schottky's can actually ADD more Cbc. It is really difficult to find
small signal Schottky diodes. Back in the days when I did discrete
designs I would often use Ge diodes to keep from forward-biasing a Si
junction... for example preventing signal-below-ground "phase-flip" in
LM324 and LM339 applications.

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice480)460-2350 | |
| E-mail Address at Website Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

 

[Rolavine]

Amazingly US troops were able to secure the oil facilities before the fall of
Baghdad, but not the #2 weapons depot in Iraq! Still looks like a screw up to
me! Also, the CNN story does not say that the facility was under contionous
guard and that all 380 tons were missing when the US troops first moved in.

You may have the fizzle out early, But just like the swift boat attacks, the
fact that the attackers are totally wrong and without evidence didn't stop them
from hurting you. Heck the way this campaign is going I still expect to see
buggared boys on the tube saying they had sex with the candidates.

Rocky

 

[John Larkin]

On 26 Oct 2004 13:11:02 -0700, yotango@yahoo.com (yo) wrote:

Hi,

I'm building a very low cost PC Oscilloscope. I have lots of spare
PC-100 SDRAM chips and would like to use them instead of buying FIFO.
I cannot use the computers memory via PCI because the PCI card cannot
guarantee memory access all the time. Therefore I would like to use
SDRAM in my circuit board.

I understand it's complex to use SDRAMS. I have an idea that could
simplify the job. Instead of having my circuit do all the
initializations, etc. to the SDRAM, why not do it through software on
the PC? Is this a good idea? I have no idea since I am not familiar
with SDRAM. The software could have access to the pins of the SDRAM.

Does anyone have any suggestions, web sites, information? I have no
idea what signals I would need to send to the SDRAM. Also, once the
SDRAM is setup / initialized, how can my circuit save & read data to
and from the SDRAM?

Many thanks!

If you're going through the PC, why not just poke the samples into the
PC's memory?

John

 

[Rolavine]

From: John Larkin jjlarkin@highlandSNIPtechTHISno

Rumor has it that 60 Minutes was going to run another smear piece on
the missing explosives, just before election night. Danly Dan hasn't
given up!

Good for him, if the media was not yanked to the right, cowering to their
corporate owners they would have torn Bush into tiny pieces of shit by now.

What should have been the editorials in response to '75% of Al Qaida leaders
have been captured or killed'.

 

[Winfield Hill]

Jim Thompson wrote...

You need an 'HC4538 non-retriggerable one shot.

Hey, Jim, did you design that one too? :&gt


--
Thanks,
- Win

(email: use hill_at_rowland-dotties-org for now)

 

[Andrew Holme]

gary s wrote:

1. Is there any way to do a quick check on a microprocessor to
determine if it's "alive"? I realize manufacturers use million-dollar
testers for functional testing, but is there a way to "generically" do
a quick check on the bench using standard test equipment?

Generically, no. It's possible with some processors (e.g. 6502) to get a
binary count on the address lines simply by applying power and a clock.

2. Ditto for speed? How can one determine if a microprocessor will run
at its marked speed on a bench?

Buy it from a reputable supplier.

3. If there is a "generic" feature set that is common to most
microprocessors, and what might that be?

There isn't.

 

[Jim Thompson]

On 26 Oct 2004 14:26:28 -0700, Winfield Hill
<Winfield_member@newsguy.com> wrote:

Jim Thompson wrote...

You need an 'HC4538 non-retriggerable one shot.

Hey, Jim, did you design that one too? :&gt

No.

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice480)460-2350 | |
| E-mail Address at Website Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

 

[Ken Smith]

In article <20041018165718.10848.00004769@mb-m25.aol.com>,
BobGardner <bobgardner@aol.comma> wrote:

They always told me 'there is no such thing as peak to peak voltage'.

Who are they and why do they always say these things.


Peak to peak voltage:

(a) The most positive voltage minus the most negitive voltage seen within
the measurement time. This is what is normally meant by peak to peak.

(b) The most positive minus the most negitive voltage that will ever be
seen. This is what you use when designing for overvoltages etc.

(c) The range of voltage that the signal spends 90% or 99% of its time
between. This is used when refering to noise.

(d) The same as any of the above with after the removal of some low
frequency components. This is used when measuring the fur on a waveform.

RMS voltage:

You the the voltage at each instant or time square it, find the average of
the squared value and the take the squareroot. This is very hand for
rating things like lightbulbs that don't react quickly to the input
voltage.

Peak to peak current:

(the same as the above with s/voltage/current/ )

RMS current:

(See RMS voltage )

Peak to peak power:

(a) Peak to peak voltage times the peak to peak current. This is used to
get a number that impresses the uninformed.

(b) In audio amplifiers this is the power produced when the pull up
transistor first shorts, then blows open and then the pull donw transistor
does the same. This is how many audio amplifiers are rated.

(c) The peak power caused by the positive swing plus the peak power caused
by the negitive swing. This is an almost honest measure of the pulsed
output handling ability of a circuit, so it is never used.

RMS power:

(a) Take the instantanious power square it, average the squares and then
squareroot the average. This is the RMS power but no-one ever means this
when they say RMS power.

(b) Average power misnamed RMS power. This is what most people mean if
they say RMS power.

(c) A completely fictional number created in the marketing department.




--
--
kensmith@rahul.net forging knowledge

 

[Jim Yanik]

Jonathan Kirwan <jkirwan@easystreet.com> wrote in
news:hkagn01utjbhk567cuovlbgogijfebaej4@4ax.com:

On 21 Oct 2004 15:51:50 GMT, Jim Yanik <jyanik@abuse.gov.> wrote:


Funny how people are SO forgiving of such things when it's KERRY,

No, it's because I *lived* through that period and I know some things
about the times.

SO WHAT? I did too.I'm 52.

People were shot and killed at Jackson State and at

Kent State -- at Jackson without any semblance of cause at all and at
Kent without what I consider good cause.

What's this got to do with the subject;KERRY?

And regardless, the point I made is correct. A soldier is supposed to
obey orders. Can you imagine what would be said of a mere lieutenant
Kerry who actively disobeyed?

But why didn't he REPORT the crimes and the illegal orders? There's more
than one channel to higher superiors.

And if he disobeyed ILLEGAL orders,then that would have been aired at a
court-martial.

Kerry did what he was supposed to do and then came back to try and
work politically to change things. I can only hope I'd have the
energy and courage to do the same.

Except Kerry was opposed to the war BEFORE he went,-after he couldn't get a
student deferment.

but if it
were Bush,things would be much different.Look at the stuff that's been
pulled about Bush's Reserve service,for example. (CBS and their
'documents') Where's the outcry about that? Even DemocRATs should be
calling for CBS to fire some of their people.(like Rather)

There's huge difference between someone who uses their born with a
silver spoon in mouth position (which, no matter what you try and say
to me, I am fairly certain he *did* use it) to take privileges that
few of us are able to afford and ... Kerry. I felt it was also very
wrong for the rich in the Civil War to be able to buy their way out by
paying someone else to take their place, as well. I'd be hard on
those families at that difficult time, as well.

On this score, Bush couldn't even handle the plush 'billet' as a pilot
garnered from privilege in the first place.

If you have proof of this "privelege" getting him the reserve job,let's see
it.

I mean, he couldn't even
handle it when he was given a safe and simultaneously resplendent job
on a gilded platter. Probably because he knew he'd fail the drug tests
and didn't even care, so he just looked for a way out and got his
daddy to find yet another excuse for him.

I would not call flying fighter jets "safe".But you probably would not know
about it.

For the record,do you have any military service?

Big difference.

One, is lilly-livered. The other, despite that you may disagree
strongly with his choices, was at least courageous. I do value
courage and I don't value cowardice in the face of luxury.

Jon

Courage would have been to REPORT the alleged war crimes,not be silent
about them.

Kerry's a weasel.
And you folks fell for it.

--
Jim Yanik
jyanik-at-kua.net

 

[Clarence]

"ChrisGibboGibson" <chrisgibbogibson@aol.com> wrote in message
news:20041022021417.16546.00002553@mb-m16.aol.com...

Hey, how many of us have ever been incarcerated?

I have - that's one, so far.....
Two..........
Gibbo

Gee, I thought Stainless steel toilets were designed for highway rest stops and
campgrounds. I just haven't been around these 'other' exclusive places. Do
they also provide a bidet?

 

[Jim Thompson]

On 22 Oct 2004 06:14:17 GMT, chrisgibbogibson@aol.com
(ChrisGibboGibson) wrote:

Hey, how many of us have ever been incarcerated?

I have - that's one, so far.....


Two..........

Gibbo

I've had a cop point a gun at me and tell me to get out of my car...
put hands on hood and was frisked; for daring to stop in a ritzy
neighborhood and watch the sun set. The cop thought I was casing the
neighborhood for a burglary. Does that count?

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice480)460-2350 | |
| E-mail Address at Website Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

 

[Anders F]

"Hassan" <hasan5012@yahoo.com> wrote in message
news:26acb996.0410211608.13df9920@posting.google.com...

"Anders F" <af-spam@hi5.dk> wrote in message
news:<2tnh8vF22e6ucU1@uni-berlin.de>...
"Frank Bemelman" <f.bemelmanx@xs4all.invalid.nl> wrote in message
news:4176182c$0$34762$e4fe514c@news.xs4all.nl...
"Clarence" <no@No.com> schreef in bericht
news:Ujidd.16248$nj.15005@newssvr13.news.prodigy.com...

Hassan wrote:
Hello;
I want to design a switching power supply with:
Vin=24 Vdc and Vo=15V @ 7A
Notice the important part:
controller and power Mosfet just in a package.

I still recommend separate mosfets! But of course Hassan /might/
actually
mean what he wrote. He might look at Sipex's offerings... (ie. SP7655 8A
buck to 28V). That is if he's actually following the discussion ;-)

/Anders
Thank you very much for your reply.
It seems that this IC is optimized for 5 V DC output. In my
application, the input voltage rises to 30 VDC and its down margin is
20 V DC.

Fair enough! You still fail to state why the integrated fets are important.
If it's space you'll be in problems with the coils for high efficiency
designs anyway. Don't take the 95% for granted - carefull selection of (big)
coils and (expensive) fet's/diodes are usually required!

The maximum input voltage for SP7655 is 28 V DC. Do you know
another IC which can support what I need? I need a switching power
supply IC (the controller and the power mosfet in just one package)

I gave you the only one I know of for high current!
With external fets it's another story:

to
make a switching power supply with the specifications of:
Input voltage less than 30 V DC and greater than 20 V DC.
Output voltage 15 V @ 7 A.

Lots of possible designs from TI, Linear, Maxim, National and so on. Others
made recommendations...

Cheers,
Anders

In case of not finding such an IC, any design recommendations with
high efficiency (greater than 85%) would be greatly appreciated.
I am looking forward to hearing.
Thank you in advance.
Hassan

 

[Jim Yanik]

Robert Monsen <rcsurname@comcast.net> wrote in
news:QCxfd.427422$mD.130460@attbi_s02:

Jim Yanik wrote:
Robert Monsen <rcsurname@comcast.net> wrote in
news:xHifd.528854$8_6.348860@attbi_s04:




No, Saddam wasn't readying a terrorist attack. Putin says now that he
had some evidence of this at the time.

http://www.cnn.com/2004/WORLD/europe/06/18/russia.warning/

This has never been corroborated by anybody else. President Bush has
himself stated there was no connection between Saddam and terrorist
attacks on the US.


http://www.townhall.com/columnists/cliffordmay/cm20041021.shtml




Nobody credible has corroborated this. That's why GW doesn't use it in
the campaign (when, if true, it would be a real boon for his claims.)
Here is an interview frontline did with the main witness backing up
the story.

http://www.pbs.org/wgbh/pages/frontline/shows/gunning/interviews/khodad
a.html

Judge for yourself.

Here is a quote from the sidebar:

"Editors Note, June 2004: A year after the U.S.-led invasion of Iraq,
there has been no verification of Khodada's account of the activities
at Salman Pak. It should also be noted that he and other defectors
interviewed for this report were brought to FRONTLINE's attention by
the Iraqi National Congress (INC), a dissident organization that was
working to overthrow Saddam Hussein."

Right wing ideologues promote this, but only because they either are
unwilling or unable to muster any healthy skepticism. This is odd,
because when confronted with actual evidence, in the form of documents
and personal eyewitness testimony, that Kerry was a war hero in
Vietnam, they appear quite skeptical.

Perhaps Putin and the KGB is as gullible as the Bush administration
seems to be with regards to evidence put forward by Chalabi and the
INC. (or were... Chalabi has been discredited, at least in the US)
However, I suspect they are simply helping out their lil buddy, quid
pro quo, for not challenging Putin's 'crackdown' on those pesky,
unnecessary democratic reforms.

By the way, if your scroll down to the bottom of the link that mr
Yanik has posted, which attempts to corroborate the iraqi terrorist
story, you find an add for an Ann Coulter book "How to talk to a
Liberal (if you must)". Coulter, of course, deserves a pie in the
face:

http://www.thesmokinggun.com/archive/1022042coulter1.html

Unfortunately, they missed. (This is one of the attacks Dyson was
using to point out how republicans are under attack from smelly
democrats.)

Do you honestly believe that Saddam Hussein had a passenger jet airframe
for any other purpose than terrorist training? Are you that naive?

What Clifford May said is far more rational than anything else that's been
put forward.

I would not consider PBS unbiased,either.

--
Jim Yanik
jyanik-at-kua.net