Driver to drive?

[Paul Burridge]

On 14 Oct 2004 00:30:25 -0700, robin.pain@tesco.net
(robin.pain@tesco.net) wrote:

"It says 'A serious error has occurred, do you want to report it to
M$' What shall I do press 'send' or 'don't send' ?"

"Press 'send', they have at least a couple of hours before the missile
arrives."

Hehe! You can just imagine a Trident submarine's nukes controlled by
Windoze. Here comes WW3.

--

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

 

[Paul Burridge]

On Thu, 14 Oct 2004 07:51:32 GMT, Rich Grise <null@example.net> wrote:

Um, please don't slap me, but I think the ampersand means, "and", and the
"in parallel" sign means "in parallel". It's a sentence, telling you that
the voltage at Vin is voltage-divided from Vcc by R1 and R2, and the
effective base input resistance for the signal is the value of the two
resistors in parallel, because from the signal's POV, Vcc and ground are
the same point. This would be the "input impedance" of the circuit, which
is the load seen by the driving source.

Rich, I may be full of sh*t (it has been known) but AIUI (or not) the
overall input impedance of the stage is R1||R2||ZQ where the last term
is the input impedance of the tranny (approximately Beta x Re+RE)
where Re is the dynamic resistance of the B/E junction and RE is the
emitter resistor (where used). Of course, I stand to be corrected (as
usual).
--

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

 

[Paul Burridge]

On Thu, 14 Oct 2004 04:51:17 -0500, "Dave" <db5151@hotmail.com> wrote:

Yeah, okay, I see it now. Damn I've gotten dense. Sorry to be such a
bother and so hard to convince. I haven't even touched any of this in over
20 years, and that has apparently affected my ability to reason and actually
think. Can't tell you all how much I appreciate your patience. And your
persistance. I've got a lot of catching up to do. Thank you.

I can certainly sympathise with that! I was in your position about 3
years ago and I've *still* got a lot of catching up to do. :-(
--

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

 

[Winfield Hill]

xray wrote...

Tonight, I lost my glasses somewhere as the debate was starting. I kept
searching for them randomly in all the expected places. Never found
them early during the debates, so settled down and watched "fuzzy"
performances, thinking there must be a cosmic message. As soon as the
debates ended, I went into another room I had passed through on my
searches and found them immediately. I don't know yet what the cosmic
message was, but only being able to find my glasses after speaks
something (yet unclear) to me. Umm... didn't change my opinions, and
I'd call this one close to a draw.

That's because you couldn't see GWB's stupid smirks, "grins" and drools.


--
Thanks,
- Win

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

 

[Joerg]

Hi Mr.P.V.,

Ralph explained circuitry options. As to calibration data the only ways
I see:

A: Find a decent forum on the web where some knowledgeable techs hang
out who could give you the fuel injector flow information.

B: Drive under a typical condition where you know the gas mileage of
your car from long experience. Such as a long flat stretch of freeway,
no wind, constant speed. Log the injector pulse frequency or have a
passenger do that. Now you have a benchmark number.

With respect to flowmeters the number of cylinders doesn't have much to
do with their complexity. They measure the flow in the fuel line to the
injector unit and that will always be one line regardless of the
cylinder number.

Regards, Joerg

http://www.analogconsultants.com

 

[Pat Ford]

"Tom Del Rosso" <ng01@att.net.invalid> wrote in message
news:7nobd.696871$Gx4.328760@bgtnsc04-news.ops.worldnet.att.net...

"John Larkin" <jjlarkin@highSNIPlandTHIStechPLEASEnology.com> wrote in
message news:ancom0tkqer8738s390u28i7iadj71j1rc@4ax.com...

Windows is good for the tugboat industry:

http://feed.proteinos.com/001229.html

When the author says...

"In the end, what you ask caused such a colossal failure on the Yorktown?
According to a military memo, "the Yorktown lost control of its propulsion
system because its computers were unable to divide by the number zero."

...I get the impression that he thinks, "a half decent computer should *at
least* be able to do *that*".

Anyway, apart from the need to execute the political appointees who chose
NT, isn't a RTOS more suitable than Unix for running a ship?

A well designed system would have killed JUST the offending app, then
restarted it if necessary, not crash the entire network.

This is where M$ seems to have missed the boat, that one app should never
have been able to take down the whole system, where is the process
independence?

Pat

 

[Joerg]

Hi Dave,

That's the king size edition. I never had anything that could run above
12MHz. Everything else was out of the $$$ range.



Remember the CPU clock is 8 MHz.


Yes, but internally you got 64MHz which is pretty hot for a uC.

This would be the leather seats that I usually can't use. Any uC with a
decent ADC on board I saw was over $2 in qties.



$1.44 in 100's from Digikey


That is indeed a bargain. Seems like they give TI and others quite a run

for the money.

Regards, Joerg

http://www.analogconsultants.com

 

[Paul Burridge]

On 14 Oct 2004 06:09:07 -0700, photo@metrodiapo.com (Pol Guerin Ph.D)
wrote:

Dearest photographers,

Metroscope research group is inviting photographers to submit any
image of metros from around the world.

What's a "metro"?
--

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

 

[CFoley1064]

Subject: Re: Photos needed for education project and publication...
From: Paul Burridge pb@notthisbit.osiris1.co.uk
Date: 10/14/2004 8:56 AM Central Daylight Time
Message-id: <kc1tm01ikl822aca5kjdovbe1u31p9vvof@4ax.com

On 14 Oct 2004 06:09:07 -0700, photo@metrodiapo.com (Pol Guerin Ph.D)
wrote:

Dearest photographers,

Metroscope research group is inviting photographers to submit any
image of metros from around the world.

What's a "metro"?

An oscilloscopescope that requires trimming of the fuzziness on focus several
times a day, uses too much vertical deflection aftershave, and keeps switching
from DC trigger to AC trigger and back again.

I thought the "Dearest photographers" was a giveaway.

I'll stick with my manly Tektronix 465. It's always known what it is. ;-)

Chris

 

[Frank Bemelman]

"Fred Bloggs" <nospam@nospam.com> schreef in bericht
news:416E64D2.1000502@nospam.com...

Once again- another HUGE group, instrumental in government policy
making, warns America to oust Bush:

[big snip]

Bit of a shame really that it takes a nearby election to wake
everybody up. But better late than never, I guess.

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

 

[Tim Wescott]

Tam/WB2TT wrote:

-- snip --

You should be able to find an IC that will do
the job.

Tam


Search on "Video Amplifier" at On, National Semi, Freescale, Linear,

Phillips, etc. You'll find something.

This can be done with transistors but you'll spend a long time at it.

--

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

 

[Tim Wescott]

Dave wrote:

-- snip --

Well, that sounds plausible until you look at the circuit issustration over
the text. There is no Rb, and R1 and R2 are not in parrallel. Please see
my reply to Paul Burridge.


-- snip --

Dave
db5151@hotmail.com

It _has_ been a while for you. The network composed of Vcc, R1 and R2
looks to the base of the transistor like a lower voltage source in
series with a single resistor (Thevinen's Equivalent). The effective
voltage is just the divided Vcc, and the effective resistance is R1 in
parallel with R2.

--

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

 

[Spehro Pefhany]

On 14 Oct 2004 15:09:17 GMT, the renowned cfoley1064@aol.com
(CFoley1064) wrote:

Subject: Re: Photos needed for education project and publication...
From: Paul Burridge pb@notthisbit.osiris1.co.uk
Date: 10/14/2004 8:56 AM Central Daylight Time
Message-id: <kc1tm01ikl822aca5kjdovbe1u31p9vvof@4ax.com

On 14 Oct 2004 06:09:07 -0700, photo@metrodiapo.com (Pol Guerin Ph.D)
wrote:

Dearest photographers,

Metroscope research group is inviting photographers to submit any
image of metros from around the world.

What's a "metro"?

An oscilloscopescope that requires trimming of the fuzziness on focus several
times a day, uses too much vertical deflection aftershave, and keeps switching
from DC trigger to AC trigger and back again.

I thought the "Dearest photographers" was a giveaway.

I'll stick with my manly Tektronix 465. It's always known what it is. ;-)

Chris

<VBG> Don't forget the closet full of color-coordinated dust covers.


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

 

[Jim Thompson]

Last time I was involved in something of this sort, it was "think
automotive, think cheap"...

Relatively "accurate" tank float gives volume, odometer system gives
distance, uP calculates MPG, miles-to-go, etc. Accurate flowmeters
are expensive.

...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]

From: bokiteam@ms21.hinet.net (boki)

Dear All,
I want to implement a simple A/D conversion by PC sound card
input channel(Line in / MIC in), therefore I can employ it as a high
resolution A/D processor ?

What is the limit/problem in hardware?

Thank you very much for your comments.

The net must be filled with informtaion about doing this, have you looked?

If you use the mic input it prob. has a dc voltage on it to power an electret
mic, so line in is a better choice. Either way the input with be ac coupled by
a series cap on the card. The line in should be good for about 300 mv rms input
(100mv is normal preamp out in hi fi). Any cheap card in a pc is noisy so you
prob. won't get as high a usable resolution as you might suspect. There are
some scope programs for PC's that use the sound card you should find one and
check it out to see the limits of this input.

Here is a link to a free sound card scope program on on the net,
I never used it

http://polly.phys.msu.su/~zeld/oscill.html

Rocky

 

[Rolavine]

Gee, this simply isn't fair as it fails to properly acknowledge Bush for
finding and bringing to justice 75% of Al Qaida members. I heard Bush say this
over 6 times now so it must be true.

I figure this single whopper is worth more than all the deceptions pulled by
the entire Kerry Campaign, period. Bush = Bull Shit.

Or maybe even worse, what if he actually believes it?

Please vote for Kerry, I'm not sure I can stand another 4 years of listening to
Bush lie.

Rocky

 

[John Larkin]

On Wed, 13 Oct 2004 21:02:24 -0700, Jim Thompson
<thegreatone@example.com> wrote:

On Mon, 11 Oct 2004 17:29:18 -0700, John Larkin
jjlarkin@highSNIPlandTHIStechPLEASEnology.com> wrote:


OK, I confess that I'm personally involved with Democrats, too. I
sleep with one every night.

John


That must be fun ;-)

...Jim Thompson

Except for the rare mosquito, and the cat jumping on my head, it
mostly is.

John

 

[Bob Stephens]

On Thu, 14 Oct 2004 11:49:33 -0400, HoloBarreŠŽ wrote:

"James Beck" <jim@reallykillersystems.com> wrote in message
news:MPG.1bd85b93336243fc989a2a@news.west.earthlink.net...
In article <ckloqo$ftq$1@nrc-news.nrc.ca>, pat.ford@nrc.ca says...

"HoloBarreŠŽ" <physical@erols.com> wrote in message
news:bPSdnU44tcV-bvDcRVn-og@rcn.net...
All--

I'm interested in measuring vehicle miles per gallon, based on
the
odometer signal and the fuel injector signals, which are all available
at
the engine's ECM (electronic control module). Flowmeters are the
benchmark
for such measurements, but for multi-cylinder vehicles, a real invasive
(plumbing) nightmare.
One representative fuel injector's signal would seem to be the
best
and least invasive compromise--not an absolute measure of true mpg's,
but
likely a very accurate "relative" indicator, good enough for my
purposes,
which could be pretty well calibrated over time.
I presume I would need some spec's from the auto mfr (nissan,
in
this case), but it's tough getting past Customer ""Service"".
Any ideas on how to obtain specs? To proceed in general? I
don't
think the workshop manual would help w/ this type of info, but then....
Knowing the array of diagnositc equipment for a vehicle might
help, so maybe a well-equipped svc. dept might help.
Any leads would be greatly appreciated.
----------------------------
Mr. P.V.'d



try asking on some of the Nissan tech lists about the #per hour of the
injectors ( or CC/minute) count the on time of the injector. Multiply the
two to get comsumption per time, then get the speed ( tap into the speed
ref
for the cruise control)
Pat

That will work as long as his fuel pressure regulator is exactly within
spec. The injectors are going to be rated at VOL/TIME @ a specific fuel
pressure. I guess you might come pretty close, but as the regulator
ages and the pressure drifts, it is anyones guess. Also, as the
injectors age and get worn and dirty the computer will adjust the on
time to keep the mix correct as far as emmisions are concerned, that
will cause errors if just on time is used. Once again, I have never
tried it, so the data might be close enough. The only long term stable
solution I can think of right now, would be to place flow sensors in the
out going and return lines of the tank and do the math there.

Jim
-----------------------

Even here, you are calculating a relatively small flow *difference*
from relatively large flows--from what I've read. If a clear fuel line "tap"
was evident, then you could use just one flowmeter. And flowmeters are not
cheap! And the plumbing is still considerable.
What you say about injectors is exactly true, but likely still the
best compromise. Thus, tapping off existing ports seems to be the
expeditious way to go.
I appreciate everyones' insights!

However, as I barely grokked the theory of tube amps, I would need
someone skilled in the nitty gritty of counters, PICs, etc. to do this--on
my car. Would local EE grads/undergrads be capable of undertaking this?

Would there be advantages, either way, to taking the odometer
pulses before the processor (right off the wheel), or the signal after the
processor (on its way to the LCD)?

FYI, according to Nissan, they calc THEIR mpgs by sensing the
height level in the fuel tank!! Flow sensor indeed!!!!
----------------------------
Mr. P.V.'d

Don't know what your budget is, but numerous manufacturer's offer OBD-II
scanners - either stand alone or OBD to RS232 for use with a laptop or PDA
which display all sensor information, error codes and let you reset those
pesky Maintenance Required flags.


Bob

 

[Bob Stephens]

On Thu, 14 Oct 2004 11:34:20 -0400, Spehro Pefhany wrote:

On 14 Oct 2004 15:09:17 GMT, the renowned cfoley1064@aol.com
(CFoley1064) wrote:

Subject: Re: Photos needed for education project and publication...
From: Paul Burridge pb@notthisbit.osiris1.co.uk
Date: 10/14/2004 8:56 AM Central Daylight Time
Message-id: <kc1tm01ikl822aca5kjdovbe1u31p9vvof@4ax.com

On 14 Oct 2004 06:09:07 -0700, photo@metrodiapo.com (Pol Guerin Ph.D)
wrote:

Dearest photographers,

Metroscope research group is inviting photographers to submit any
image of metros from around the world.

What's a "metro"?

An oscilloscopescope that requires trimming of the fuzziness on focus several
times a day, uses too much vertical deflection aftershave, and keeps switching
from DC trigger to AC trigger and back again.

I thought the "Dearest photographers" was a giveaway.

I'll stick with my manly Tektronix 465. It's always known what it is. ;-)

Chris

VBG> Don't forget the closet full of color-coordinated dust covers.


Best regards,
Spehro Pefhany

Let's not even get into probing...

 

[Iwo Mergler]

boki wrote:

Dear All,
I want to implement a simple A/D conversion by PC sound card
input channel(Line in / MIC in), therefore I can employ it as a high
resolution A/D processor ?

What is the limit/problem in hardware?

Thank you very much for your comments.

Best regards,
Boki.

The soundcard input is a high pass at a few tens of
Hz. It doesn't work at DC and badly at low frequencies
(<~50Hz).

It's not as high resolution as you may think. 16 bit
is not really achievable inside a PC and most soundcards
are not even close, anything below the first 12 bits or
so is random numbers.

Otherwise it's possible and done quite regularily.

Iwo