Driver to drive?

[Ken Smith]

In article <10ojd7uj3m7c1f6@corp.supernews.com>,
Tim Wescott <tim@wescottnospamdesign.com> wrote:

Ban wrote:

Tim Wescott wrote:

- snip -

I think the digital approach is very valid in this case, but there will be a
I/O delay higher than with an analog filter.

If you use an IIR filter the system delay won't be much more than an
analog filter (the filter itself will be comparable, any excess will
just be from the acquisition and output sample time).

Actually the delay may be less in the digital case. With real analog
parts you may need to put in more poles to make up for component
tolerances. In the digital IIR version your parts can easily be good to
0.1%

--
--
kensmith@rahul.net forging knowledge

 

[Active8]

On Thu, 04 Nov 2004 11:54:27 -0700, Jim Thompson wrote:

On Thu, 4 Nov 2004 10:52:23 -0800, "Joel Kolstad"
JKolstad71HatesSpam@Yahoo.Com> wrote:

"Paul Burke" <paul@scazon.com> wrote in message
news:2uukkhF2d5084U1@uni-berlin.de...
But if it's a school exercise, use the freeware you already have- your
brain. An 8 input map is cumbersome, but not impossible, and you'll soon
realise why most people use HDLs these days.

I wasn't aware that Karnaugh maps could be (systematically) used for more
than 5 variables? Can they be? Back when I was in school we used the
'table method' (I've forgotten the real name) beyond 4.

And 4 is enough to convince people of the value of HDLs, I think!


Naaah! 8 is easy as long as you are neat with your partitioning. But
I'm going to have to learn some HDL of some flavor or another... a lot
of my recent CMOS analog chip designs require a lot of addressing,
sometimes 12-wide :-(

That's the road I statrted on and most of what I read indicated that

Verilog was the way to go - can't remember why - yet VHDL still
lives.

Would the group opine?

--
Best Regards,
Mike

 

[Rich Grise]

On Thu, 04 Nov 2004 13:58:34 +0000, Fred Bloggs wrote:

The US elections are null and void- the nation remains deeply divided
and this will intensify over the next four years. This is the price the
Bush administration pays for their criminal acts during the campaign and
the elections. The GOP knew they were going to lose Ohio and that is why
they deliberately rigged things so that the mean wait time to vote was
something like 4 1/2 hours, this is heretofore unheard of. And even
assuming the elections were legitimate, the outcome does not change the
*fact* that the Bush administration engaged in seriously criminal
misrepresentation of intelligence data that lead this nation to war.
Everything about this picture is dead wrong. Democracy is finished in
this country. An astonishing work of art that sums up what we have done
can be found here: http://www.michaelmoore.com/

So, if the stuff he's getting away with is really "illegal," will he
be brought up on charges any time soon?

Thanks,
Rich

 

[Terry Given]

Kevin Aylward wrote:

Terry Given wrote:

Kevin Aylward wrote:


Rich Grise wrote:


On Wed, 03 Nov 2004 12:56:43 +0000, Kevin Aylward wrote:
[about FET current sources]


Vt\Vp can vary several hundred percent so this one off batch means
nothing. You can expect huge variations. Your "design" is an
accident waiting to happen.


So, in other words, are you saying, as was I, that coming off the
line, even with care in the production process, there is still so
much variation in the cutoff current


V Pinch off/V Threshold and Idss



that makes it such that you'd have
to individually test each unit? (which, of course, jacks the price
up a bunch)


Yes. Unless, of course your design can stand say, at least a
+100%/-50% variation in current.

Kevin Aylward

Which it probably cant, not if you wanted a "constant" current source
(sink) in the first place.


This is actually a different issue. A constant current can be constant,
yet vary

The constant bit refers to its ability to remain fixed with respect to
its applied voltage.


Although I suppose if I tried hard enough I
could think of an application where the stability was important but
not the magnitude, just not off the top of my head.



Driving a zener is one application where its actual magnitude might not
be important over a wide range. This would be for obtaining a very good
PSRR on a reference.

thats what I initially thought of, but mostly when I've done this I have
biased the zener with a particular current to achieve a known (sometimes
near zero, other times not) tempco, for overall temperature stability in
addition to PSRR. +100%/-50% blows that out of the water.

How stable over temperature Kevin?


Er... Data sheet...

er...I'm very lazy, I figured you could rattle some numbers off the top
of your head

Kevin Aylward

Cheers
Terry

 

[Active8]

On Thu, 4 Nov 2004 10:52:23 -0800, Joel Kolstad wrote:

"Paul Burke" <paul@scazon.com> wrote in message
news:2uukkhF2d5084U1@uni-berlin.de...
But if it's a school exercise, use the freeware you already have- your
brain. An 8 input map is cumbersome, but not impossible, and you'll soon
realise why most people use HDLs these days.

I wasn't aware that Karnaugh maps could be (systematically) used for more
than 5 variables? Can they be? Back when I was in school we used the
'table method' (I've forgotten the real name) beyond 4.

And 4 is enough to convince people of the value of HDLs, I think!

Yeah, and the K-map apps I've found are only free for lower numbers
of inputs, though some of them are pretty cool apps.
--
Best Regards,
Mike

 

[Ken Smith]

In article <41840f93$0$43451$e4fe514c@news.xs4all.nl>,
Frank Bemelman <f.bemelmanx@xs4all.invalid.nl> wrote:

"Rich Grise" <rich@example.net> schreef in bericht
newsan.2004.10.30.20.38.16.629248@example.net...
On Sat, 30 Oct 2004 20:18:58 +0200, Frank Bemelman wrote:

"John S. Dyson" <toor@iquest.net> schreef in bericht
news:cm0ejh$1dj$1@news.iquest.net...

that way. The 'throwing' out of office attitude really does show a
violent mentality. Our system does NOT 'throw' someone out of
office,

What the heck. For all I care someone shoots him out of his office.

Changed the subject line.

I don't think Mr. Dyson is evil, but merely a dupe. He's being
manipulated, as are all the faithful, by a double-whammy of irrational
fear, and knee-jerk jingoistic faith in their savior, George the
Infallible.

And I've chenged the subject line too - the hating has to stop
somewhere.

Okay, tar & feathers it is.

How dare you do something so disgusting and hateful with the oil that
earth has provided you. You you hate the earth so much that you would
degrade its oil products by putting them on Dyson. Think of the poor
chickens having to run around naked. The level of depravity people reach
is sometimes truely shocking. I suppose you'd even kick republicans with
a muddy boot without considering the microorganisms that you may be
forcing to come into contact with them.


--
--
kensmith@rahul.net forging knowledge

 

[Terry Given]

nick wrote:

becase i have a 8 variables logic circuit ,i want to find a software to solve it
any kind of freeware can do that?
thanks!

by the time you have found the s/w (if any), learned how to use it and
produced a result you could easily have solved the K-map by hand. Use a
pencil and a large sheet of paper. Stop trying to cheap on homework,
you'll never learn anything that way.

Cheers
Terry

 

[John Larkin]

On Sat, 30 Oct 2004 18:22:28 GMT, Fred Bloggs <nospam@nospam.com>
wrote:

John Larkin wrote:

And it's always guesswork as to whether we're even trying to grow the
correct strain just ahead of the expected flu season.

Not really- they sample migrating bird feces among other things to make
a darned good determination of strain- and it rare that the vaccine will
contains a single strain- sometimes it can be six or more. It is a
neutralizing anti-body vaccine so that it is perfectly possible to
stimulate several varieties of B-cell simultaneously, and this is what's
done.

This is hardly
the first time big mistakes have ocurred in the flu vaccine program.

Right- the strain identified for the 2003 flu season failed to propagate
in the egg medium. That production was canceled and the vaccine from the
2002 flu season was re-ordered.


I've read that newer growth media are being developed, more like the
big vat fermenters used to grow a lot of other drugs and vaccines.

Whatever- you're a damned moron.

Maybe so, but strangely enough, I've never had flu.

John

 

[Charles W. Johson Jr.]

"John Crighton" <john_c@tpg.com.au> wrote in message
news:418a878e.4866937@News.individual.net...

On Thu, 04 Nov 2004 08:58:36 -0800, John Larkin
jjlarkin@highlandSNIPtechTHISnologyPLEASE.com> wrote:




Employees *must* go on strike if the collective organization - the
union - decides to.

You are getting close but still not quite there yet. The employees
who are having a dispute at a particular work place decide
whether to strike or not. The employees at a particular work site
may be union members and they make the decisions about
how they handle themselves in their dispute.
There is no *must* go on strike.




And it's more often the union bosses who decide,

Sorry, wrong again. The union members the employees, decide
on the sort of action to be taken.
The union field officer from head office guides and advises the
membership, he cannot make a group of people do something
the group does not want. Why do think stop work meetings are
held? To discuss, vote on tactics and strategy, not to just
stand around and be dictated to by some individual.



and who negotiate, and present a done-deal settlement to the workers.

Negotiate on behalf of the members, yes.
Present a done deal settlement, No. That would be silly.


People who dissent get hurt.

Och away you go!
You have been watching too many silly hollywood films.

Here is a little factoid for you.
The most powerfull union in Australia is the doctors union.
The AMA ( Australia Medical Association).
http://www.ama.com.au/
You probably have an American version with similar initials.
When doctors dissagree or dissent at meetings do you think
they behave in an uncivilisd manner hurting one another?





How can the two dozen or so people working in a union
head office deliberately stuff up yours or anyone's business?
Why would they want to?

For money and power, of course.

You are still not understanding. Let me illustrate.
Lets say I was working in your company as a
cleaner and I was in the Cleaners and Janitors
Union (I just made that up for the sake of explanation)
How the hell can the Cleaners and Janitors Union
make money and get power by trying to stuff up your
company? Why the hell would they want to?
They are not interested in you until there is a problem
with a CJU member.



1. Union dues.

What an individual does with a few hundred dollars
of his own money per year has nothing to do with you.
How will a thousand dollars or so, of union dues from
four or five cleaners, affect you? It is their money
for goodness sake!


2. Side deals with management.

That is crazy talk.
So the four or five fictitious cleaners working at your company
are being deceived by someone at the CJU head office.
You have been watching too much television.
Why would a small union be interested in talking to you
about anything other than their members conditions?


3. Political power.

Crazy talk again. A small union like the fictitious cleaners
union I made up is only interested in its members. The
union may show support for a politcal party but how the
hell can a small union or even a large one gain political
power? That is just silly. Oh wait! Yes, I did forget about
Lord Sutch in the UK with the Screaming Looney Party,
so why not the Broom and Buckets Party. Do you really
see that as political power?



4. Setting an example to other businesses.

Setting an example of what exactly?




Around here,

You are confusing me. When you say around here do
you mean your particular company or the USA in general?
How would you know anything about union negotiations if
you have never been a member of a union or discussed
industrial relations problems with union members.



union bosses do all the contract negotiations, and
recommend that the r+f accept or reject management offers. You may
want somebody to do that for you, but I never have.


Sorry mate you are wrong.
I repeat again, how would you know that union bosses do
all negotiations when you say that you have never been
in a trade union or discussed anything with trade union
members on any industrial matters. You can't be talking
from practical experience so where did you get this gem
of info that union bosses do all negotiations?

Most negotiations or disputes start on the shop floor and
are resolved on the shop floor, the more difficult problems
go to higher levels. Union shop floor delegates sort out
minor problems with supervisors and low level managers,
and if need be, high level managers. There is rarely a
need to bring in a union field organiser. The shop steward
may ask a union field organiser for advise over the phone
but rarely needs to call him for a face to face meeting.




Are you referring to your own company?

No! I'd retire before I let a union come between me and my people.




For illustration purposes.
Lets say Maria, one of your cleaners who happens to be
a member of the Cleaners and Janitors Union was having
a problem with one of your engineers touching her up
and making improper suggestions. What would you do,
when I, as shop floor delegate of the CJU come to see
you about the problem?
Would you discuss the problem with me?

No! I'd handle it myself.


snip

That happened to us, about a year or so ago, but the sexual harassment
was female-on-female. Young female on older female, in fact.

As Maria's shop floor representative would I be able
to sort out the problem in a civilised manner with you?
If so, how would you go about it.

It wasn't easy; her supervisor and I both had to work on it from
different angles. A combination of sympathy and threats made the
harasser back off, so we didn't have to fire her. Everything's OK now.

It's interesting that you assumed that the harassment would be
male-on-female, and that it would be an engineer (presumably
"management") harassing a worker, "labor".

I didn't assume anything, I made up the simple fictitious scenario
for you to explore. I chose a low paid worker and a vital worker,
both of whom are equal in my eyes, I make no distinction there.
So far all you have said is that you would not talk to Maria and her
elected shop floor representative. So how the hell you can fix the
problem when you have still to hear the facts, is a mystery to me.

On behalf of Maria, I come to you with a problem and you say "I'll
handle it myself" That sounds a bit rude and abrupt and may
escalate the problem. So far you are not sounding good to me or
Maria.




It is interesting to note that Matrons in hospitals rank among
the worst bullies in the workplace more sinister than male bullies.

I am heartened to know that you sorted the female on female
real life problem out without anyone getting sacked.



John


Regards,
John Crighton
Sydney

JC you need to realize that Unions don't work the same world wide.

Charles

 

[Tim Wescott]

Richard Coutts wrote:

I live in an old appartment with one telephone line than runs 20' from
the entry point to the wall receptacle. I have a splitter off the
receptacle with a 25' run to a phone, and a 3' run to a phone router
(MultiLink ASAP DR401). Off the DR401 I have a 25' run to a Fax Modem
and a 3' run to another phone.

The problem is that the Caller ID of the phones doesn't always work.
Sometimes it shows the caller number, othertimes "-ERROR-". The ring
tones always reach their destination, but the Caller ID info is
erradic.

I'm wondering if the long runs, combined with the number of devices I
have is to much for the line and if I need a line relay (if there is
such a thing) to boost the signal of the incoming calls. Does that
make any sense? If so, what kind of relay would I need? I searched
the web, but didn't see anything that fit this description.

Any advice would be greatly appreciated.

Thanks,
Rich

Given that POTS lines are designed to run several miles from the switch
to you, I would be surprised that a few feet one way or another inside
your apartment would cause problems. There are line relays, but they
are made for the telephone companies to place every 5 - 10 miles on long
runs. They are ugly, bulletproof, reliable and very, very expensive --
they're probably also obsolete in these days of fiber optics.

If you can try disconnecting everything except for one caller-ID phone
or box at your wall receptacle, then call yourself on a cell phone or
otherwise arrange for some incoming calls. This will help isolate the
problem to "inside the apartment" or "outside the apartment".

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

 

[Fred Bloggs]

Paul Burridge wrote:

On Sat, 30 Oct 2004 18:33:03 GMT, Fred Bloggs <nospam@nospam.com
wrote:


I don't see that he looks fearful at all. And as a matter of fact he
makes Bush look like a retarded fanatic by comparison. It is a sorry
commentary on the state of affairs in the US when a major terrorist
leader is more truthful with the American people than the President
himself. Bush has been misleading America (into war), Bush has been
suppressing the truth, Bush is in fact corrupt and greedy, Bush has been
robbing America of trillions to pay off his corporate cronies. Now if
there's something Osama said that wasn't true, let us know what it is.


Since what he says is so heavily and selectively censored, I doubt
anyone will.

Another atrocity coming out of the Bush camp is this incredibly
insulting comparison of Bush with Winston Churchill- this is the most
disgusting insult of Churchill in recorded history! Protesters have
compared the well-known images of Churchill sitting on the roof of the
air defense ministry smoking a cigar during a German night raid to catch
the "fireworks"- and compared that to the documented cowardly rat-like
performance of the Bush/Cheney scum, running for bunkers at the
slightest whisper that danger may be near. It is the most disgusting
abomination of propaganda of all time, the US has no leader of
Churchill's caliber- nowhere close.

 

[Rich Grise]

On Sat, 30 Oct 2004 11:34:53 +0100, Terry Pinnell wrote:

"Steve" <aeroman10@yahoo.com> wrote:

Hello,
My group and I built the following dc motor control circut:
http://forum.webzila.com/index.php?act=Attach&type=post&id=2441

I replaced the SK100 transistor with NTE262 and the SL100 with TIP110

That seems an odd choice. The circuit (duly modified as suggested by
nospam and Terry Given to correct the drawing error) will need further
changes if you use those types.

The SK100 and SL100 are a complementary pair of general purpose medium
power transistors, with max current around 500 mA and power rating of 800
mW. Plainly inadequate for your 2A motor (and presumably hard to find), so
you're obviously right to change them.

The NTE262/TIP110 are up to the job but that pair is not complementary.
And both are Darlingtons, so cannot be expected to be straightforward
replacements. Also, if you want to use Darlingtons (to eliminate the
2N2222s?), then why not use the *pair*? IOW, either the TIP110/115 or the
NTE261/262?

I'm wondering if the resulting 4 E-B drops in series with the motor will
have to be taken into consideration.

Thanks,
Rich

 

[Clarence]

"John Crighton" <john_c@tpg.com.au>

Has no clue how labor unions work in the US.

BTW: The "AMA" is NOT a union.

 

[Stefan Heinzmann]

Ratch wrote:

3) He took our country to war against one of the meanest and murderous
regimes on this planet. The US did the world a BIG favor by getting rid of
Saddam and Sons, Inc. Not only did that regime oppress its people, they
subverted France, Germany, Russia, and the UN by bribing high government
officials with kickbacks from the Oil for Peace monies. That's one reason
why so many people and the UN are pissed off at the US. The war stopped and
exposed the gravy train those folks were running.

Bugger, I opposed the Iraq war without having received any bribes! Do
you know where I should have registered for my share of kickbacks? I'm
not a government official, but I seem to have missed out on something...

--
Cheers
Stefan

 

[Paul Burridge]

On Thu, 04 Nov 2004 21:59:51 GMT, "Ratch" <Watchit@Comcast.net> wrote:

I cannot convey how happy I am that Bush won a second term. Here's
why.

1) He is a pro-lifer.

ROTFL!!
For a "pro-lifer" he seems awfully keen on killing people!
Or is it only American lives he's in favor of preserving? :-D
--

"What is now proved was once only imagin'd." - William Blake, 1793.

 

[John Fields]

On Thu, 04 Nov 2004 23:40:09 +0000, Paul Burridge
<pb@notthisbit.osiris1.co.uk> wrote:

On Thu, 04 Nov 2004 21:59:51 GMT, "Ratch" <Watchit@Comcast.net> wrote:

I cannot convey how happy I am that Bush won a second term. Here's
why.

1) He is a pro-lifer.

ROTFL!!
For a "pro-lifer" he seems awfully keen on killing people!

---
Nahh... Just animals who have no respect for their own lives or those
of anyone else.

--
John Fields

 

[Ratch]

"Stefan Heinzmann" <stefan_heinzmann@yahoo.com> wrote in message
news:cmedro$b2r$03$1@news.t-online.com...

Ratch wrote:

3) He took our country to war against one of the meanest and murderous
regimes on this planet. The US did the world a BIG favor by getting rid
of
Saddam and Sons, Inc. Not only did that regime oppress its people, they
subverted France, Germany, Russia, and the UN by bribing high government
officials with kickbacks from the Oil for Peace monies. That's one
reason
why so many people and the UN are pissed off at the US. The war stopped
and
exposed the gravy train those folks were running.

Bugger, I opposed the Iraq war without having received any bribes! Do
you know where I should have registered for my share of kickbacks? I'm
not a government official, but I seem to have missed out on something...

You have to provide some service or material that the US needs to
prosecute the war. Follow the rules on contract bidding and you too might
share in some war profits. Ratch

--
Cheers
Stefan

 

[John Larkin]

On 4 Nov 2004 15:35:13 -0800, jeffm_@email.com (JeffM) wrote:

Using force to override another person's will is evil. It's that simple.
Rich Grise

What about overriding the will of children?
Scott Stephens

That's the most insidious evil of all
Rich Grise

I overrode the will of my children to protect them, civilize them, and
because I love them. To do less would be evil.
John Larkin

Aw, c'mon John. Wouldn't having "Lord of the Flies" played out before you
have been wonderfully entertaining?

Gaah. Children are savages. It's a dicey thing to keep a kid from
running wild, especially as a teenager; it takes a very delicate hand,
the right but not too steep incentive slope. My wife and I are almost
the only parents we know who haven't been screamed at, "I hate you!"

We know one girl who dropped out of high school, got a job in a pizza
restaurant, embezzled $32,000, and had an abortion, all in one year.

John

 

[Ratch]

"Paul Burridge" <pb@notthisbit.osiris1.co.uk> wrote in message
news:fcflo01p477gnn59ssslqe6ns44niovlef@4ax.com...

On Thu, 04 Nov 2004 21:59:51 GMT, "Ratch" <Watchit@Comcast.net> wrote:

I cannot convey how happy I am that Bush won a second term. Here's
why.

1) He is a pro-lifer.

ROTFL!!
For a "pro-lifer" he seems awfully keen on killing people!

Yes, certain kinds of people. We all know who they are don't we?

Or is it only American lives he's in favor of preserving? :-D

Of course not. The US does not like to see anyone, citizen or
foreigner alike die unless they deserve it.

Pro-life in this case means not delibrately killing innocent humans
when it can be avoided. Ratch

--

"What is now proved was once only imagin'd." - William Blake, 1793.

 

[John Larkin]

On Thu, 04 Nov 2004 00:59:47 GMT, Rich Grise <rich@example.net> wrote:

The presumption that you can possibly know what someone else's "own
good" is, is the height of arrogance.

It's known as "parenting."

John