Driver to drive?

John Larkin · Nov 1, 2004

On Sun, 31 Oct 2004 05:38:45 +0000 (UTC), kensmith@green.rahul.net
(Ken Smith) wrote:

In article <gij8o05ku5p90vl9g6kg1bsrqdrghlqbjm@4ax.com>,
John Larkin <jjlarkin@highlandSNIPtechTHISnologyPLEASE.com> wrote:
On Sat, 30 Oct 2004 17:02:45 +0000 (UTC), kensmith@green.rahul.net
(Ken Smith) wrote:

Just because you can find a bigger number to divide
by doesn't make 380 million tons a small number.

Thousand.

Yes, I guess I should have said "thousand". It doesn't really change the
point since someone could quote 700 billion and have a bigger number to
divide it by.

Without meaning to offend, I have noticed that more liberal people
tend to be innumerate. Something in my brain just automatically
sanity-checks any numbers I see (habit developed from engineering, of
course) and I'm astounded by how much of the stuff in the press makes
no sense, orders of magnitude off from reality. I guess they don't
teach much math in journalism school.

John

John Larkin · Nov 1, 2004

On Sun, 31 Oct 2004 20:57:54 GMT, Fred Bloggs <nospam@nospam.com>
wrote:

John Larkin wrote:
On Sun, 31 Oct 2004 20:55:04 +0100, "Frank Bemelman"
f.bemelmanx@xs4all.invalid.nl> wrote:

but then again, I am not like you.

Hey! We agree on something! How nice.

John

I am also relieved to know you are one of a kind. God is good.

Everybody is one of a kind. God is great.

John

Wim Ton · Nov 1, 2004

"terry" <leonlai2k@yahoo.com> wrote in message
news:9904d48.0410311917.2e7964a2@posting.google.com...

Hi,

I want to interface from a MCU to a large memory IC (1M-16M bytes)
using small number of pins (such as I2C or SPI) to store records. Is
there such type of memory IC in the world?

I remember ST makes a serial EEPROM of several megabits.

Wim

Anders F · Nov 1, 2004

"Terry Given" <my_name@ieee.org> wrote in message
news:udjhd.1723$op3.72514@news.xtra.co.nz...

terry wrote:
Hi,

I want to interface from a MCU to a large memory IC (1M-16M bytes)
using small number of pins (such as I2C or SPI) to store records. Is
there such type of memory IC in the world?

Thanks!

use a USB micro such as TUSB3210,

Thats only a device contoller?

and buy one of those cute little
flash-sticks. 4 wires.....and you can get 512Mb flash sticks

And even bigger... But afaik. they need an USB host controller...
In any case the USB protocol is unnecessarily complicated imho. I'd go for
Hamiltons suggestion ;-)

/A

Cheers
Terry

Anders F · Nov 1, 2004

"Wim Ton" <wimton@blueyonder.co.uk> wrote in message
news:mLvhd.429$Bk6.399@fe2.news.blueyonder.co.uk...

"terry" <leonlai2k@yahoo.com> wrote in message
news:9904d48.0410311917.2e7964a2@posting.google.com...
Hi,

I want to interface from a MCU to a large memory IC (1M-16M bytes)
using small number of pins (such as I2C or SPI) to store records. Is
there such type of memory IC in the world?

I remember ST makes a serial EEPROM of several megabits.

And Atmel Also....
/A

Anders F · Nov 1, 2004

<cablespec@3web.net> wrote in message
news:b8b7ae38.0411011006.7882d777@posting.google.com...

Hi,

I really need help....

I'm looking an easy way to design a dual complementaty SPST switch
with a single control line in order to replace an obsolete Tesas
Instrument IC: TL604CP

Did you check maxim-ic.com and the like?

Could it be possible to design a such switch using a CMOS CD4066 or by
using a couple of fets?

Yep. Be aware of make-before-break demands though!

(for reference you should state what specs you actually need - not just what
obsolete component that satisfy them ;-)

/A

Joerg · Nov 1, 2004

Hi John,

All I've seen was a reference to magnetic coupling. Anybody see more?

Here is an EDN story but it says 'proprietary' so I guess it'll be

guarded like the recipe for Coca Cola:

http://www.reed-electronics.com/ednmag/article/CA453517?industryid=2817

If they have it patented already it would be found on the USPTO server.

Magnetic is what I'd do because it is cheap. A toroid coupler can be
made for 50 cents. But for a DC-200MHz job this requires modulation or
sampling before the transformer. There is also the optical path but it
can get expensive at that bandwidth which is why I designed that out
pretty much every time.

Regards, Joerg

http://www.analogconsultants.com

John Fields · Nov 1, 2004

On Mon, 01 Nov 2004 11:49:40 GMT, xray <notreally@hotmail.invalid>
wrote:

sorry about redundancy but messages are being cancelled

---
Sadly, not enough of them...
---

plonk, plonk, etc.

I can sit on the sidelines

and snipe

because I am better than you

unless you

agree with me

like

Clarence

--
John Fields

Jonathan Kirwan · Nov 1, 2004

On Mon, 01 Nov 2004 08:02:21 -0800, John Larkin
<jjlarkin@highlandSNIPtechTHISnologyPLEASE.com> wrote:

Right: Ronald Reagan taught us that, and pulled us out of the Carter
stagflation

By turning us from the greatest creditor nation (in 1980) into the greatest
debtor nation (by 1983, I think.) I believe this story made the cover of Time,
around then.

Jon

Reg Edwards · Nov 1, 2004

Something in my brain just automatically
sanity-checks any numbers I see (habit developed from engineering, of
course) and I'm astounded by how much of the stuff in the press makes
no sense, orders of magnitude off from reality. I guess they don't
teach much math in journalism school.

John

=================================

In schools, the same importance should be attached to Elementary Statistics
as reading, writing and rithmatic. Starting with the teachers who no doubt
will ask for extra pay!
----
Reg

legg · Nov 1, 2004

On 1 Nov 2004 07:12:46 -0800, david.pariseau@sbcglobal.net (David
Pariseau) wrote:

Your circuit is tied to the mains - what else is it tied to?

Are you observing surface-mount part advisory re connections to pin2?

Are you making measurements with other mains-powered equipment when
the circuit is live?

Are you correctly identifying L and N?

If external (output) connections to the reference are intermittent,
are you sure that the common line is mating first and opening last on
each and every make/break event?

RL

The circuit is not tied to anything else. The schematic was the
entire circuit. I'm using a battery operated multimeter and a
portable scope (transformer isolated) to take measurements.

There's transformer isolation and then there's the use of an
ungrounded isolation transformer. There should be no safety ground on
live line-connected scopes, if you want minimum test equipment
influence.

What is the SMT advisory re: pin 2? Pin 3 I left unconnected as per
the datasheet.

Sorry, ref to pin 2 was for SC70 only. Shoting the iffy pin to neg ref
avoids numbering confusion and inadvertent tracking errors.

I'm pretty sure L and N are identified correctly, but what would that
matter in re: to the circuit (aside from the safety concerns, etc)

When combined with test equipment leakage (to safety earth), inverted
input provides a source of line and connection surge currents.

I'm using an auto-transformer (variac) to make the connections, but
even if the connections are intermittent, how would this affect
operation. Aside from adding a delay to successful operation.

Intermittency was referenced to any output connections. Connection
surges would be forced to pass through the reference's positive
terminal, if late mating or early breaking of the common reference
terminal was allowed.

RL

Joel Kolstad · Nov 1, 2004

Magnetic is what I'd do because it is cheap. A toroid coupler can be made
for 50 cents. But for a DC-200MHz job this requires modulation or sampling
before the transformer.

My understanding is that this is exactly how it's done -- modulation with a
pretty high frequency carrier and recovery on the opposite side of a
transformer. I wouldn't be surprised if optical coupling were used to
provide the carrier reference to the isolated side.

Overall it's an impressively effective and _cheap_ way to accomplish the
task!

---Joel

Terry Given · Nov 1, 2004

John Larkin wrote:

On Mon, 01 Nov 2004 09:44:05 -0700, Jim Thompson
thegreatone@example.com> wrote:

http://www.ronanddave.com/week/week.htm

...Jim Thompson

That makes sense. I think that most liberals and most conservatives
really pretty much want the same ends, a prosperous, healthy, just
society, but disagree on methods.

John

ayup. Not only that, but the labels are rather inadequate - after all,
how can you sum up a single persons beliefs with a word, and hope to be
accurate? now extend that to, say, 100,000,000 people, and the label
gets even less accurate.

The word "just" is also likely to be a strong point of difference - eg a
lesbian vs a christian fundamentalist likely have opposing views of what
is just.

Cheers
Terry

Peter L. · Nov 1, 2004

Both Saudi Arabia (http://www.WhoIsBush.com) and Iran
(http://www.iranian.ws) have weighed in in support of Bush. Serious
republicans are between a rock (Iraq?) and a hard place....

Peter

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http://www.newsfeeds.com The #1 Newsgroup Service in the World! >100,000 Newsgroups
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Paul Burridge · Nov 1, 2004

On 1 Nov 2004 11:21:41 -0800, feilip@gmail.com (feilip) wrote:

Hi,

I am new in designing circuit using off-the-shelf component. Would
anyone pls give me some insight?

I just wonder what is a typical design steps if I use a transmitter
chip, such as, Texas Instruments TRF6900, to build a transmitter. Do I
simulate the chip with external passive components in some software
such as Agilent ADS?

Sounds like you're trying to get in at the deep end. RF is not the
place to start designing anything!
--

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

Joerg · Nov 1, 2004

Hi Joel,

Magnetic is what I'd do because it is cheap. A toroid coupler can be made
for 50 cents. But for a DC-200MHz job this requires modulation or sampling
before the transformer.

My understanding is that this is exactly how it's done -- modulation with a
pretty high frequency carrier and recovery on the opposite side of a
transformer. I wouldn't be surprised if optical coupling were used to
provide the carrier reference to the isolated side.

I don't think they would use any optical. Coupling the ref carrier can

done through the same transformer or a separate one. I'd try to stick to
a single transformer, especially with these kinds of scopes where cost
is critical.

Overall it's an impressively effective and _cheap_ way to accomplish the
task!

Very cheap indeed but this isn't a new method. Lots of prior art and

certainly not just the ones I did.

Regards, Joerg

http://www.analogconsultants.com

Joerg · Nov 1, 2004

Hi Paul,

Sounds like you're trying to get in at the deep end. RF is not the
place to start designing anything!

Oops. RF is how I started my foray into electronics as a kid. Should I

stand in the corner now, repent and feel ashamed?

Regards, Joerg

http://www.analogconsultants.com

Jim Thompson · Oct 30, 2004

On Sat, 30 Oct 2004 16:52:25 +0000 (UTC), kensmith@green.rahul.net
(Ken Smith) wrote:

In article <4g37o0lpd315mv5j94el7sb2kpillehrkr@4ax.com>,
John Fields <jfields@austininstruments.com> wrote:

[.... OBL ....]
Don't you worry your little head about about it, _we'll_ get him.

What you mean we pailface?

[snip]

Ummmm? Did you mean "paleface"... you lefties can't even spell, no
wonder you'll vote for a snake.

Although, on second thought, John _might_ have a face that looks like
a bucket ;-)

...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

Frank Bemelman · Nov 1, 2004

"Joerg" <notthisjoergsch@removethispacbell.net> schreef in bericht
news:W0yhd.3505$zx1.352@newssvr13.news.prodigy.com...

Hi Paul,

Sounds like you're trying to get in at the deep end. RF is not the
place to start designing anything!

Oops. RF is how I started my foray into electronics as a kid. Should I
stand in the corner now, repent and feel ashamed?

No, you just have to start all over again

--
Thanks, Frank.
(remove 'x' and 'invalid' when replying by email)

Winfield Hill · Nov 1, 2004

Tom Seim wrote...

Site now directed to Air America Radio.

No, it's redirected to http://www.amerika.com, which is
someplace else, with a set of anti-Bush links arranged
in a cricle about the amerika.com symbol, a big W with
a slash through it.

Air America Radio is simply the link that happens to be
on top of the circle of links.

Guess they didn't like the way the polls are going!

Who are the amerika.com folks anyway? And who was
www.realpolitics.com before they got hacked? Or are/
were they really the same as amerika.com all along?

--
Thanks,
- Win

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

Driver to drive?

John Larkin

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