Driver to drive?

[Spehro Pefhany]

On Tue, 23 Nov 2004 17:11:58 -0500, the renowned Boris Mohar
<borism_-void-_@sympatico.ca> wrote:

I use only one address but I fail to see why I could not have different
billing and shipping address.

That's a fraud indicator.


Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com

 

[Clifford Heath]

Boris Mohar wrote:

I use only one address but I fail to see why I could not have different
billing and shipping address.

Fraud avoidance. The supplier bears the liability for online
credit-card orders, so it's their business what security rules
they make. The delivery address at least gives investigators
a place to start asking questions.

 

[Paul Burridge]

On Tue, 23 Nov 2004 22:53:39 GMT, Rich The Philosophizer
<null@example.net> wrote:

And I think the most off-putting concept of all, to those who think that
their thoughts are all there is, is the fact that God lives in your own
personal asshole.

And there was I thinking that God didn't exist as anything other than
a problematical concept! Rich, you may have saved my soul! ;-)
--

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

 

[Rich Grise]

On Tue, 23 Nov 2004 18:03:14 -0500, Spehro Pefhany wrote:

On Tue, 23 Nov 2004 17:11:58 -0500, the renowned Boris Mohar
borism_-void-_@sympatico.ca> wrote:

I use only one address but I fail to see why I could not have different
billing and shipping address.

That's a fraud indicator.

I did not know this. This explains why it was so hard for me to convince
people that I was for real - Paypal won't "validate" a P.O. box. I also
had a problem when I went to vote[0], which is kinda weird. I have a
billing address which is a PO box, which is the address listed on my bank
account, but my shipping address is the factory where I sit and my RV is
parked in their lot. 12143 1/3 Rivera Rd. A third, get it? It's on the
odd-numbered side of the street. ;-)

But I guess sending money is a lot less likely to meet with distrust than
having it sent to me. ;-)

Thanks!
Rich

[0] They want a house address. I thought I registered last election!
Anyway, I said, well, this PO box is my mailing address, the only other
address I have is the factory where I sit, this is the closest thing I
have to an address! They were still confused, being government employees
- I guess that qualifies as a manufacturing job these days - Manufacturing
Excuses! - Anyway, in my frustration, I said, "I'm homeless!" They asked
me, "Oh! What are the major cross-streets?" Like, "Oh, which corner do
you sit on?" In about four seconds, somebody pulled a "provisional ballot"
out of the air somewhere.

I voted Badnarik. He didn't win. )-;
R.

 

[Ken Smith]

In article <afc7q0lfs9phhs1v3l4cqocruvkurusel5@4ax.com>,
Boris Mohar <borism_-void-_@sympatico.ca> wrote:

This website from hell does not reflect the rest the company.

Are you really sure it doesn't. Some companies were started by a bunch of
smart guys who are now all retired leaving the place in the hands of the
bosses children or the like. When I see a botched web site I worry about
the whole company. It can indicate a rot has set in.


--
--
kensmith@rahul.net forging knowledge

 

[John Miles]

In article <afc7q0lfs9phhs1v3l4cqocruvkurusel5@4ax.com>, borism_-void-
_@sympatico.ca says...

This website from hell does not reflect the rest the company.

You mean you can order parts that actually exist from the website and
have them delivered in a timely fashion?

-- jm

------------------------------------------------------
http://www.qsl.net/ke5fx
Note: My E-mail address has been altered to avoid spam
------------------------------------------------------

 

[Artist]

You will need a working fluid that vaporizes well below 200F. The
coolant used in air conditioners maybe. Then, once vaporized in boiler
and under pressure, it must be passed through either a turbine or a
cylinder with a piston. These are coupled to a generator to convert the
energy from the heat that can do useful work (enthalpy) into
electricity. You will need a low temperature heat sink to remove the
heat energy in the fluid that cannot do useful work (entropy) from the
fluid in gas phase to return it to liquid phase. Then this liquid must
be pumped back into the boiler.

There is not a way to get significant amounts of electriciy from heat
without moving parts.

I recommend mechanical engineering text books on thermodynamics.

Raymond wrote:

Hey, smart people out there.

How can I generate, about 6 volts at 1.5 amps, using only heat.
The heat will be about 200 degrees F, sometimes hotter.

I can't find any thermocouples that generate much more than 20 mills.
And, I'm not stuck on thermocouple technology.

Help.

If you can help me, I'd love to reciprocate ($). Feel free to e-mail
me at
rrgoldstein@yahoo.com

--
If sj. appears in my email address remove it to respond.
It is a spam jammer.

Fight the mark of the beast: http://www.house.gov/paul/privacy
Stop judicial corruption: http://www.Jail4Judges.org
Support antispam legislation: http://www.cauce.org

Hulk Hogan for President!

 

[Robert Baer]

Artist wrote:

You will need a working fluid that vaporizes well below 200F. The
coolant used in air conditioners maybe. Then, once vaporized in boiler
and under pressure, it must be passed through either a turbine or a
cylinder with a piston. These are coupled to a generator to convert the
energy from the heat that can do useful work (enthalpy) into
electricity. You will need a low temperature heat sink to remove the
heat energy in the fluid that cannot do useful work (entropy) from the
fluid in gas phase to return it to liquid phase. Then this liquid must
be pumped back into the boiler.

There is not a way to get significant amounts of electriciy from heat
without moving parts.

I recommend mechanical engineering text books on thermodynamics.

Raymond wrote:
Hey, smart people out there.

How can I generate, about 6 volts at 1.5 amps, using only heat.
The heat will be about 200 degrees F, sometimes hotter.

I can't find any thermocouples that generate much more than 20 mills.
And, I'm not stuck on thermocouple technology.

Help.

If you can help me, I'd love to reciprocate ($). Feel free to e-mail
me at
rrgoldstein@yahoo.com

--
If sj. appears in my email address remove it to respond.
It is a spam jammer.

Fight the mark of the beast: http://www.house.gov/paul/privacy
Stop judicial corruption: http://www.Jail4Judges.org
Support antispam legislation: http://www.cauce.org

Hulk Hogan for President!

Me thinks that a thermocouple has no moving parts...

 

[Tim Shoppa]

Robert Baer <robertbaer@earthlink.net> wrote in message news:<41A43C6A.CCCEEBA6@earthlink.net>...

Me thinks that a thermocouple has no moving parts...

And it'll never be as efficient as a an engine with moving parts.

Not knowing the application it's hard to say if efficiency or "no
moving parts" is a requirement.

RTG's use thermocouples and have a "sweet spot" of a few hundred
watts. But the price/performance point for a deep space probe may
be different than the intended application here . (Not that all
RTG's go into deep space probes, either...)

Tim.

 

[Boris Mohar]

On Tue, 23 Nov 2004 19:41:28 -0800, John Miles
<jmiles@pop.removethistomailme.net> wrote:

In article <afc7q0lfs9phhs1v3l4cqocruvkurusel5@4ax.com>, borism_-void-
_@sympatico.ca says...

This website from hell does not reflect the rest the company.

You mean you can order parts that actually exist from the website and
have them delivered in a timely fashion?

-- jm

Only as a last resort. This time I ordered the parts by sending them an
email. They phoned back for the Visa number (shudder).

There is on part that I have been buying for years. MAX412. It is a very
good and quiet dual op amp. I cannot just order it but instead I have to
submit for quotation. After few days the quotation arrives it the "quote
basket" after which I am allowed to place the order.

BTW when I log in my billing and my shipping address is displayed and at
that point I am allowed to change either one.

--

Boris Mohar

 

[lemonjuice]

On Wed, 24 Nov 2004 03:43:02 GMT, Rich Grise <rich@example.net> wrote:

On Wed, 24 Nov 2004 00:02:52 +0000, Paul Burridge wrote:

On Tue, 23 Nov 2004 21:44:01 GMT, Rich Grise <rich@example.net
wrote:

I don't know what his point is, but I just simply would like to
present a
way that some people have been looking at this base voltage/base
current
issue. Yes, the application of base voltage does ultimately result
in an
effect on the collector current. But how many designs have you ever
seen
where the designer relies on a particular Vbe drop to give the right
answer? I've _never_ seen a circuit like that, other than things
like
current mirrors, and in that case, the Vbe is taken into
consideration
either as an almost-constant, a la diode drop, or simply to be as
equal as
is practicable to its partner in the circuit. But the easiest way
I've
ever seen presented of doing the circuit analysis uses base current
and
beta, with Vbe being a secondary (or less) consideration.

This is the only bone I have to pick here with you. If you want to
call it
"voltage controlled", then fine, go ahead, but I know that every
time I've
copied a circuit out of a book or whatever, the operative parameter
has
been base current.

The Vbe/Ic way of looking at it works accurately over a much greater
range than the Ic/Ib relationship, Rich. Even *I* know that!

OK. I lose.

http://www.st-andrews.ac.uk/~www_pa/Scots_Guide/info/comp/active/BiPolar/bpcur.html

Kevin Aylward has been corroborated by The Internet. ;-)

Cheers!
Rich

Mmmmmm Here is a website that says a transistor is a charge
controlled device
http://encyclobeamia.solarbotics.net/articles/transistor.html

 

[Lady Chatterly]

In article <35k7q0tvdapmh1dg4rr7ej2mdu6b0vog9n@4ax.com> Paul Burridge <pb@notthisbit.osiris1.co.uk> wrote:

On Tue, 23 Nov 2004 22:53:39 GMT, Rich The Philosophizer
null@example.net> wrote:

And I think the most off-putting concept of all, to those who think that
their thoughts are all there is, is the fact that God lives in your own
personal asshole.

And there was I thinking that God didn't exist as anything other than
a problematical concept! Rich, you may have saved my soul! ;-)

Have you considered anything else?

--
Lady Chatterly

"This isn't being generated by a human is it?" -- Meat-->Plow

 

[Tim Shoppa]

"Siddhartha Jain" <losttoy2000@yahoo.co.uk> wrote in message news:<1101289326.009805.181840@c13g2000cwb.googlegroups.com>...

Hi,

http://www.ewis.ca/onlinestore/scripts/prodView.asp?idproduct=809

Oh, that is rich. "Acronymic design". "Color viewfinder".

I get this camera for $12 in India. What uses can I put it to (apart
from clicking photos)?

Possible uses:
- Take off the alleged 50mm lens and use it as a loupe
- Turn the flash into a stun-gun
- The film advance motor could be used somewhere else as well

IR Autofocus stuff is fun to play with but this camera appears to
be fixed-focus.

Here in North America point and shoots with IR rangefinders start around
$35-$40.

Tim.

 

[Bob Stephens]

On 24 Nov 2004 06:11:07 -0800, Tim Shoppa wrote:

Oh, that is rich. "Acronymic design".

I hope that's not a SNAFU...


Bob

 

[John Larkin]

On Wed, 24 Nov 2004 02:36:34 -0000, "john jardine"
<john@jjdesigns.fsnet.co.uk> wrote:

Who else makes DDS chips?.

Interestingly, nobody that I know of. Strange.

There are DDS ip blocks for fpga's, but it's hardly worth it, wasing
all those pins and using an external DAC.


John

 

[Nicholas O. Lindan]

Ah, yes. Goes by many names.

Hit the 'have you heard the news' button on the left and scroll down
1/3 for the newspaper add. Click on add to enlarge for reading.

http://www.merrillphoto.com/JunkStoreCameras.htm

This camera under the Canomatic name was sold for up to $299.00
and people bought it. When it was a Canomatic it was also a
"Video" camera.

But I imagine the Olympia's bargain $129 price is because it is
missing the "Multi-Angle Tripod".

At $12.95 you are being ripped off.

This thing is a landfill-liability. You need to be paid for
taking it.

Oh, the Merrill photo site is worth visiting.

--
Nicholas O. Lindan, Cleveland, Ohio
Consulting Engineer: Electronics; Informatics; Photonics.
Remove spaces etc. to reply: n o lindan at net com dot com

 

[Bob Stephens]

On Wed, 03 Nov 2004 09:36:44 -0800, John Larkin wrote:

On Wed, 03 Nov 2004 17:22:37 GMT, Bob Stephens
stephensyomamadigital@earthlink.net> wrote:

Anyone know of a small,low power, SMT, audio frequency voltage controlled
oscillator IC?
I'm trying to generate a swept sinewave from 100Hz to 10Khz driven from a
12 bit DAC. I've found a bunch of serial input types, but unfortunately I'm
out of I/O on this design - just one DAC remaining available.

TIA

Bob

Could you talk to a serial-data DDS chip? They're almost perfect sine
generators.

I assume you don't have enough compute power to play a swept sine
directly on a DAC!

John

I looked at a couple of DDS chips. They'd be ideal except all the ones I
saw need serial data, serial clock, and an enable or latch of some sort - 3
I/O pins I don't have

And yes, I did try to generate a sine in software with a look up table,
phase accumulator etc. Not even.

Thanks for the reply

Bob

Belated followup:

Thanks for the DDS idea John. I ended up shifting some I/O around and
bit-banged the SPI interface to an AD9833 - works great!


Bob

 

[Ken Smith]

In article <pan.2004.11.24.21.48.51.969184@example.net>,
Rich Grise <rich@example.net> wrote:

On Wed, 24 Nov 2004 19:31:07 +0000, Ken Smith wrote:

In article <pan.2004.11.24.16.22.57.868869@example.net>,
Rich Grise <rich@example.net> wrote:
On Wed, 24 Nov 2004 16:09:43 +0000, Kevin Aylward wrote:

lemonjuice wrote:
...
Mmmmmm Here is a website that says a transistor is a charge
controlled device
http://encyclobeamia.solarbotics.net/articles/transistor.html

I already addressed this in another post.

Noting that the "charge controlled model" is a naming misnomer. This
model describes charge as a function of applied controlling voltages. It
don't mean that charge is controlling anything. Charge is the
*dependant* variable in the "charge controlled model".

The web site also state the transistor is "a curent controlled device".
So what, its wrong. I have explained many times why it is a voltage
controlled. Its basic physics and trivial.

F = q(E + vXB)

Electric fields make charges move. Period. End of story.


Is there a junction temperature term in there somewhere? From what I've
been able to glean by mental osmosis, if you can drive B-E with a stiff
enough voltage, it makes a dandy temperature sensor. ;-)



It kind of works like this:


N-Doped area P-Doped
------------------------------
! e ! !
! e e ! !
! e e ! !
-----------------------------

There is a cloud of electrons in the N doped material.

The temperture of a bunch of electrons is the random jiggling and
bouncing around they do. If an electron jiggles and bounces its way into
the depletion layer, there is a chance the electric field can pull it over
into the P-Doped area. The electron could also just jiggle and bounce its
way back into the N-Doped area. The current is the result of the sum
of what happens to a bunch of electrons. A bunch of statistical "chances
and odds" stuff is involved. The more the electrons jiggle and bounce,
the more the chances of one of them getting sucked across so the current
depends on temperature. It is still the field that moves them across
though, so the field at the junction is still what "controls the current".

BTW: The depletion layer is not something the maker builds. If you put
P-doped material against N-doped materal, the carriers will jiggle and
bounce their way across the junction on a pure "chances and odds" basis
until enough voltage difference is created to stop them.

Thanks for teaching me to play "find-your-foot", but you've completely
evaded the question and really provided no useful information at all.

I guess that was too complex for you so I'll simplify it:

"Yes the temperature shows up in the equations"

other way. This is why technicians who slap together circuits by the seat
of their pants treat transistors as current-controlled, because it makes a
second-order expof***ingnentional term cancel the f**k out! Well, just
scale down by about two orders of magnitude. But really! Sheesh!

No they don't do that at all. They make this:

Vcc
!
--------+--------
! !
\ \
/ / R4
\R1 \
! !
! !/ c
+---------------!
! !\ e
! +-----
/ / !
\ R2 \ R3 ---
/ / ---
! ! !
! +-----
GND GND



R2 < 0.1 * R3 * (minimum HFE for this transistor)


Vb = Vcc * R2/(R1 + R2)

Ve - Vb - 0.7

Ie = Ve / R3


Gain = R4 * 25mV/Ie

--
--
kensmith@rahul.net forging knowledge

 

[Paul Burridge]

On Wed, 24 Nov 2004 17:12:50 GMT, Rich Grise <rich@example.net> wrote:

Is there a junction temperature term in there somewhere? From what I've
been able to glean by mental osmosis, if you can drive B-E with a stiff
enough voltage, it makes a dandy temperature sensor. ;-)

Yes, but usually only of *junction* temp. ;-)
--

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

 

[john jardine]

"Bob Stephens" <stephensyomamadigital@earthlink.net> wrote in message
news:nspg0k5vgruy$.1mm8i9hi5r7vp.dlg@40tude.net...

On Wed, 24 Nov 2004 02:36:34 -0000, john jardine wrote:

"Boris Mohar" <borism_-void-_@sympatico.ca> wrote in message
news:afc7q0lfs9phhs1v3l4cqocruvkurusel5@4ax.com...

This website from hell does not reflect the rest the company. It has
to
be
most un intuitive HTML construct on Internet.

[clip Boris and me ranting]

I had no problem ordering them from stock at Digikey (US). No evaluation
boards available though - even from AD.

BTW I stumbled on someting they don't mention in the data sheet.

They claim that "...NCOs inherently generate continuous phase signals,
thus
avoiding any output discontinuity when switching between frequencies."

Well, I'm using this chip as a swept sinewave generator, and unless you
handle it right it's discontinuous as hell. Merely updating the frequency
register does not update the output synchronously. There is a settling
time
where the output waveform is unstable. The workaround for this is to
enable
frequency register 0 with the starting frequency, preload frequency
register1 with the next value and flip the frequency0/1 enable bit, load
the next value into frequency0, toggle the bit etc.


Bob



Thanks Bob. Yep, swept sine (and phase switching) is what I'm after. Digikey

are doing some test marketing in the UK. Seems a hefty postage charge but
it's worth it just to get hold of the damned things.
I'll heed your warning, as usual the AD DDS datasheets seem near worthless.
regards
john