Driver to drive?

On Sunday, October 21, 2012 1:09:23 AM UTC-4, rajibbandopadhyay wrote:

Dear friends,

The reason why I got stuck with electronic circuits just before biasing

will be clear in a short while.

Without the support of a good teacher the logic involved appears

formidable.

The pages attached relate to transistor as an amplifier and its biasing.

The book concerned is All.new.electronics.self-teaching.guide.2008. The

questions are posted on some of the attached pages themselves. The rest

attached pages are for logical continuity and completeness.

I will try to find a way on how to get those pages uploaded and then get

back.

Please help.

Regards

You're not going to learn much from a book like that, it is just recipes. The gain equation for the uncompensated config beta x Rc/ hie is more symbolic than numerical since hie is all over the map depending on collector current swing.

 

On Monday, October 22, 2012 9:37:41 AM UTC-4, dagmarg...@yahoo.com wrote:

On Oct 22, 9:20 am, bloggs.fredbloggs.f...@gmail.com wrote:

On Monday, October 22, 2012 8:49:30 AM UTC-4, dagmarg...@yahoo.com wrote:

On Oct 21, 12:20 pm, bloggs.fredbloggs.f...@gmail.com wrote:



On Sunday, October 21, 2012 9:05:39 AM UTC-4, dagmarg...@yahoo.com wrote:



On Oct 19, 12:49 am, bloggs.fredbloggs.f...@gmail.com wrote:



http://blogs.nbc12.com/decisionvirginia/2012/10/arr.html



Okay, 8 ballots, by a lone wolf.  He's in jail.  Good.



Who's doing what about this?



 http://news.investors.com/ibd-editorials/100312-628015-obama-ignores-...



55k in FL, 30k in VA, 20k in OH, etc.  By odd coincidence, if you read



the source report, it's swing states that are most affected.



James Arthur



That story is more deceptive misrepresentation. /Every/ absentee voter has access to FVAP online, they do not need a physical office.http://www.fvap.gov/



That would've been handy for my buddy, just back from doing route

clearance from his FOB in the 'Stan. As he was walking ahead of his

Buffalo, picking up IEDs off the road with his bare hands, he could've

logged onto some federal <expletive> website and done whatever.



That's a FAKE testimonial if I ever heard one...



It's absolutely true. I talk to him several times a day. I'm

grateful each and every day that he's back, intact.



You keep making up narratives to explain away the real facts, like

reincarnating Nazi eugenicists to supposedly suppress military

voters. I don't understand that.



Best,

James Arthur

Nobody is doing route clearance by picking up IEDs with their bare hands.

 

[legg]

On Mon, 22 Oct 2012 22:04:28 -0800, Robert Baer
<robertbaer@localnet.com> wrote:

legg wrote:
On Sat, 20 Oct 2012 21:01:30 -0400, "Martin Riddle"
martin_rid@verizon.net> wrote:


"Jan Panteltje"<pNaonStpealmtje@yahoo.com> wrote in message
news:k5uv6l$6vf$1@news.albasani.net...
On a sunny day (Sat, 20 Oct 2012 12:42:11 -0800) it happened Robert
Baer
robertbaer@localnet.com> wrote in<J8Dgs.1184$aW7.1012@newsfe24.iad>:

See similar title in a.b.s.electronic for PDF.
Almost took longer to document than to build..

Nobody can get that group.

alt.binaries.schematics.electronic ?
I get that group, but I don't see the post.

Cheers

Ditto

RL
Somehow the post vaporized, so i put it up on my corporate site at
http://www.oil4lessllc.org/HV%20probes/ .
That probe was a "quick and dirty"; rise time seems to be better than
20nSec (my "pulse generator" is a HP3312A function generator).
However, the output step only goes up 70% then a slow rise to max
with a time constant of about 600nSec.
*
Am using SPICE to help design a 40KV probe and i seem to be homing
into a design with values.
The listing is below (and on that site).

Have you attempted a spice simulation of the part you've actually
built and tested? This would be more than just instructive and assist
in developing the newer iteration and an understanding of the spice
derivative.

RL

 

[rickman]

On 10/23/2012 10:34 AM, dagmargoodboat@yahoo.com wrote:

This is evil:
http://dailycaller.com/2012/07/03/usda-combats-mountain-pride-self-reliance-to-boost-food-stamp-rolls/

James

What is evil about trying to reach everyone who qualifies for food stamps?

Rick

 

[rickman]

On 10/23/2012 1:28 AM, dagmargoodboat@yahoo.com wrote:

On Oct 22, 5:28 pm, rickman<gnu...@gmail.com> wrote:

What are the 200+ components? I thought there were two primary
components, the inner tube and the outer tube... plus the fluid and the
end caps. What are the other 196?

http://www.solyndra.com/technology-products/cylindrical-module/
"Each module in a 200 Series panel has 195 individual solar cells."

That is not the same as 200+ components, is it?

Where did you get the 2-5x more expensive number?

An estimate. Inner tube, plus outer, etc., 2x for the poor
utilization of the PV film, etc.

Ok, an estimate of something you are not qualified to estimate.

I don't know the details of the design. Someone said the Solyndra
design is thin film compared to thick film which means bulk silicon. So
the cost structure may be very different. A lot of people here talk
like they actually understand all the details. I certainly don't. But
it is fairly obvious that the design was viable at some point.

Not obvious at all. What's obvious is that it wasn't--it FAILED.

Ok.

So there were tax incentives to home users. How many home installed
solar panels do you see? Around here there are nearly NONE.

That's because *even with subsidies to make them, and 2/3rds off the
selling price*, they still didn't make sense.

The cost of the pv units is only part of the cost of an installation.
I've priced them and they are very expensive because of the cost of the
controllers plus the installation labor. It would take some 20+ years
to pay back the expense and that assumes you get full credit for the
electricity from the power company. We have that in Maryland, but only
the "generation" charge, you still have to pay for transmission and
distribution of all electricity you use but don't get reimbursed for any
electricity you generate. Most comparisons use the full cost of
electricity, which is no longer valid for any juice you sell back to the
power company. In other words, if you install pv panels, only install a
couple of hundreds Watts.

What more proof does one need?

Most of their big sales& installations were b.s. situations, ISTR.

Photovoltaic doesn't make sense on home rooftops. The installed cost is
about the same the electricity they will ever generate and the lifetime
cost is not well established. The few rooftop units I have seen on
homes were removed before they tried to sell the houses.

The fact that the tax incentives were not enough incentives to get
Solyndra units on every home in America doesn't prove they were bogus.
It just proves that home pv is not viable.

Rick

 

[rickman]

On 10/22/2012 7:40 PM, John Larkin wrote:

On Sun, 21 Oct 2012 21:31:26 -0400, rickman<gnuarm@gmail.com> wrote:

On 10/21/2012 7:50 PM, John Larkin wrote:

The real energy breakthrough has been fracking, privately developed,
privately funded. There is now a glut of natural gas in the USA, and
we will likely be a net oil exporter soon.



But if Romney wins the election he will be pushing "clean" coal (even
though that is an oxymoron). Since natural gas is cheaper than coal for
most uses, how will that work? Will the free market be suspended?

Rick

I'd assume that nobody would elect to build new coal plants, and that
older ones would be converted to gas or shut down because they aren't
competitive. Clean coal would be even more expensive, and CO2
sequestration would be impossibly expensive.

If you elect Romney, you will "electing" to build new "clean coal" power
plants... at least if you can believe Romney. I have heard him talk
about promoting "clean coal" a number of times, even when he isn't in
coal country!

Rick

 

[rickman]

On 10/22/2012 9:25 PM, Les Cargill wrote:

rickman wrote:
On 10/22/2012 6:39 PM, Les Cargill wrote:
rickman wrote:
On 10/22/2012 2:54 PM, Les Cargill wrote:

Pretty much. The materials used are in a pretty fair state of control.

snip

You wait until here to snip???




Heh. Yeah.

What are the materials used in fracking?

Rick

http://en.wikipedia.org/wiki/Proppants_and_fracking_fluids

--
Les Cargill

Wikipedia doesn't do well exploration. What do the companies that do
fracking say they use?

Rick


To my understanding, pretty much what's in the Wikipedia article.
There are variations, but the mainline is what's shown there.

Then you don't understand. They won't say what they use for fracking
and have resisted *strongly* efforts to pass bills requiring them to say
what they use. People in the area who drink the water want to know what
they should test for and the frackers won't frackin' tell them.

Rick

 

[Jamie]

rickman wrote:

On 10/22/2012 7:40 PM, John Larkin wrote:

On Sun, 21 Oct 2012 21:31:26 -0400, rickman<gnuarm@gmail.com> wrote:

On 10/21/2012 7:50 PM, John Larkin wrote:


The real energy breakthrough has been fracking, privately developed,
privately funded. There is now a glut of natural gas in the USA, and
we will likely be a net oil exporter soon.



But if Romney wins the election he will be pushing "clean" coal (even
though that is an oxymoron). Since natural gas is cheaper than coal for
most uses, how will that work? Will the free market be suspended?

Rick


I'd assume that nobody would elect to build new coal plants, and that
older ones would be converted to gas or shut down because they aren't
competitive. Clean coal would be even more expensive, and CO2
sequestration would be impossibly expensive.


If you elect Romney, you will "electing" to build new "clean coal" power
plants... at least if you can believe Romney. I have heard him talk
about promoting "clean coal" a number of times, even when he isn't in
coal country!

Rick

It's going to be a sad day for many if Obama does not win, it may even
put a smile on my face.

Jamie

 

[Robert Baer]

legg wrote:

On Mon, 22 Oct 2012 22:04:28 -0800, Robert Baer
robertbaer@localnet.com> wrote:

snip
Somehow the post vaporized, so i put it up on my corporate site at
http://www.oil4lessllc.org/HV%20probes/ .
That probe was a "quick and dirty"; rise time seems to be better than
20nSec (my "pulse generator" is a HP3312A function generator).
However, the output step only goes up 70% then a slow rise to max
with a time constant of about 600nSec.
*
Am using SPICE to help design a 40KV probe and i seem to be homing
into a design with values.
The listing is below (and on that site).
The attenuation ratio is 2500 and is "protected" to ground like the
Tektronix probes.
Why 2500? Because it takes two 1Gohm resistors to withstand the 40KV
(target rating is 30KV with some "elbow room").
Note the resistance ratio is exactly 2500:1 and (now) the capacitance
ratio is close also.

Physical layout is to have a floating ring around each resistor,to
provide a controllable input coupling and capacitive divider (which is
the secret of a (theoretical) infinite risetime.
Now around this whole assembly will be a grounded shield (to isolate
input from external bazzzz fazzzz).
I think that five sections is a reasonable division of each resistor
for emulation of the actual distributed part.

Risetime seems to be infinite, but there is this slow "hump" that i
am fighting.
Any ideas as how to solve?


It's conventional to include a 'tip' resistor, that will absorb
contact (arc) surges safely.

The hardest thing about HV probe structure, is getting practical
values that are physically possible, to do the job. Look at physical
embodiments, make a few measurements, then go to the model.
* The only guides i have so far,are the Tektronix P6015 probe and the

"quick and dirty" 1Gohm probe i built.
Unfortunately, i have no way to making reasonable guesses related to
capacitances involved in their construction. The few P6015 drawings
leave a lot to be desired, and measurements on my Q&D probe would be
extremely difficult to do due to some of the very low values.

Not much point in speculating over something that you can't build.
Sizing the capacitive divider is a real physical issue. Your Cr/Cs
ratio may be impractical.
* But i have one working one, and the model for it.

And as far as sizing the capacitive divider, as long as there is a
simple capacitor from tip to output, and its ratio to a total
corresponding capacitance from there to ground, there is no problem;
that is simple - for a simple model.

As to risetime, an intentional RCseries, paralleling C22 position can
act on leading edges. Look at the current midpoint voltage (jn
C10/C11). Also, run an ac sweep.......the LF and HF gains will meet at
some point that will look like a can of worms, and is just as easily
manipulated, given physical constraints.

RL
* The Cs was tweaked for "best looks", and could be easily done

mechanically. The Cr is done via floating coaxial "shield" around the
resistor (see the aluminum foil wrap on the Q&D probe i built).

 

[Robert Baer]

Jon Elson wrote:

Robert Baer wrote:



Physical layout is to have a floating ring around each resistor,to
provide a controllable input coupling and capacitive divider (which is
the secret of a (theoretical) infinite risetime.
Now around this whole assembly will be a grounded shield (to isolate
input from external bazzzz fazzzz).
I think that five sections is a reasonable division of each resistor
for emulation of the actual distributed part.

Risetime seems to be infinite, but there is this slow "hump" that i
am fighting.
Any ideas as how to solve?
High-Ohm resistors have been reported to be non-linear, possibly that is
what you are getting. You may need some more poles of RC compensation
to try to fix this.

Jon
"non-linear" can mean many things..voltage coefficient, temperature

coefficient, and resistance per unit across the length (i assume that is
what you are referring to).
Where is that "report"? What date?
I do not think the resistance per unit length varies much, certainly
not so much as to give the waveform seen in the simulation.
That can be varied by quite a bit by changing Cs and/or Cr.
However, it might be a GOOD THING (as Martha Stewart would say) to
use ten pi pads instead of five for the resistor.

 

[Robert Baer]

legg wrote:

On Mon, 22 Oct 2012 22:04:28 -0800, Robert Baer
robertbaer@localnet.com> wrote:

legg wrote:
On Sat, 20 Oct 2012 21:01:30 -0400, "Martin Riddle"
martin_rid@verizon.net> wrote:


"Jan Panteltje"<pNaonStpealmtje@yahoo.com> wrote in message
news:k5uv6l$6vf$1@news.albasani.net...
On a sunny day (Sat, 20 Oct 2012 12:42:11 -0800) it happened Robert
Baer
robertbaer@localnet.com> wrote in<J8Dgs.1184$aW7.1012@newsfe24.iad>:

See similar title in a.b.s.electronic for PDF.
Almost took longer to document than to build..

Nobody can get that group.

alt.binaries.schematics.electronic ?
I get that group, but I don't see the post.

Cheers

Ditto

RL
Somehow the post vaporized, so i put it up on my corporate site at
http://www.oil4lessllc.org/HV%20probes/ .
That probe was a "quick and dirty"; rise time seems to be better than
20nSec (my "pulse generator" is a HP3312A function generator).
However, the output step only goes up 70% then a slow rise to max
with a time constant of about 600nSec.
*
Am using SPICE to help design a 40KV probe and i seem to be homing
into a design with values.
The listing is below (and on that site).

Have you attempted a spice simulation of the part you've actually
built and tested? This would be more than just instructive and assist
in developing the newer iteration and an understanding of the spice
derivative.

RL
Yes, but i started with a very simple C across the 1G resistor and

one to ground; it was plain that i needed (so to speak) more cable
capacitance,and better adjust-ability of that.
Made no refinements.
Basically, that probe was an exercise of "can it be done"?
And it has the noted deficiency of no ground return inside (hence the
big fat warnings).

 

On Oct 23, 7:07 pm, rickman <gnu...@gmail.com> wrote:

On 10/23/2012 1:28 AM, dagmargoodb...@yahoo.com wrote:

On Oct 22, 5:28 pm, rickman<gnu...@gmail.com>  wrote:

What are the 200+ components?  I thought there were two primary
components, the inner tube and the outer tube... plus the fluid and the
end caps.  What are the other 196?

http://www.solyndra.com/technology-products/cylindrical-module/
   "Each module in a 200 Series panel has 195 individual solar cells."

That is not the same as 200+ components, is it?

Where did you get the 2-5x more expensive number?

An estimate.  Inner tube, plus outer, etc., 2x for the poor
utilization of the PV film, etc.

Ok, an estimate of something you are not qualified to estimate.

Not qualified? It's math and logic--no license required. Yet.

In another thread, we see that Solyndra's *cost* was indeed not less
than 3.3x the *selling price* of competing flat panels. Q.E.D.

Digging through Solyndra's literature, their claimed output was net
10% better, at triple the cost, and twice the area. Are round cells
cute? Sure. But, you can get the same output in half the space for
about 1/3rd the already-too-high cost.

If PV is too expensive for homes, >3.3x that price isn't going to fly.

--
Cheers,
James Arthur

 

On Oct 23, 3:46 pm, bloggs.fredbloggs.f...@gmail.com wrote:

On Monday, October 22, 2012 9:37:41 AM UTC-4, dagmarg...@yahoo.com wrote:
On Oct 22, 9:20 am, bloggs.fredbloggs.f...@gmail.com wrote:

On Monday, October 22, 2012 8:49:30 AM UTC-4, dagmarg...@yahoo.com wrote:

On Oct 21, 12:20 pm, bloggs.fredbloggs.f...@gmail.com wrote:

On Sunday, October 21, 2012 9:05:39 AM UTC-4, dagmarg...@yahoo.com wrote:

On Oct 19, 12:49 am, bloggs.fredbloggs.f...@gmail.com wrote:

http://blogs.nbc12.com/decisionvirginia/2012/10/arr.html

Okay, 8 ballots, by a lone wolf.  He's in jail.  Good.

Who's doing what about this?

 http://news.investors.com/ibd-editorials/100312-628015-obama-ignores-...

55k in FL, 30k in VA, 20k in OH, etc.  By odd coincidence, if you read

the source report, it's swing states that are most affected.

James Arthur

That story is more deceptive misrepresentation. /Every/ absentee voter has access to FVAP online, they do not need a physical office.http://www.fvap.gov/

That would've been handy for my buddy, just back from doing route

clearance from his FOB in the 'Stan. As he was walking ahead of his

Buffalo, picking up IEDs off the road with his bare hands, he could've

logged onto some federal <expletive> website and done whatever.

That's a FAKE testimonial if I ever heard one...

It's absolutely true.  I talk to him several times a day.  I'm

grateful each and every day that he's back, intact.

You keep making up narratives to explain away the real facts, like

reincarnating Nazi eugenicists to supposedly suppress military

voters.  I don't understand that.


Nobody is doing route clearance by picking up IEDs with their bare hands.

Actually, they do. And, they walk the route, in front of their
vehicles. Not always, but as conditions require.

I was similarly appalled. My pal explained that in many places their
Buffaloes (armored vehicles) don't give good enough visibility, often
they can just turn you into a blind target. And, the IEDs are *very*
hard to see. Better to be out where you can see.

They have certain precautions in their favor (which shall go
unposted). But yes, manually, especially to disarm. The Buffalo has
an extensible arm; they use that too where they can.

I asked if he actually found any. "Oh yeah. Constantly. Several,
the hard way."

It changed him. He saw things men should not see.


James Arthur

 

[rajibbandopadhyay]

On Tue, 23 Oct 2012 12:24:47 -0700, Jim Thompson wrote:

[...]

Around 1970 I wrote a tutorial on biasing for ICE, but haven't been able
to locate a copy. The following example MAY be of help to you...

http://www.analog-innovations.com/SED/MC1530-TeachingExercise.pdf

while I look around for the write-up of more generalized methods.

And I would be eagerly waiting...
Regards

 

[John Larkin]

On Wed, 24 Oct 2012 09:38:44 -0700 (PDT),
bloggs.fredbloggs.fred@gmail.com wrote:

On Monday, October 22, 2012 3:30:23 PM UTC-4, John Larkin wrote:
On Mon, 22 Oct 2012 11:31:31 -0700 (PDT),

bloggs.fredbloggs.fred@gmail.com wrote:



On Monday, October 22, 2012 11:50:37 AM UTC-4, John Larkin wrote:







I can't believe an engineer wrote the above. You are an engineer, right?







Obviously not.





What's obvious is that you and that other simpleton are not very good at engineering. In the real world, outside your sheltered little lab environment, there are a multitude of effects that degrade predicted performance. Until the price of Si flat panles dropped, the Solyndra design was best in class.

http://www.solyndra.com/technology-products/cylindrical-module/



What electronics have you designed lately? Show us.


What have you designed is more pertinent. We see a lot of trial and error hacking but little else.

Look at my web site. We do very little breadboarding, no prototypes.
We go directly from engineering design to manufacturing and the first
article usually works.

This works, with a couple of resistor value changes (unexpected ADC
behavior) and one jumper (a charge pump worked, but the ceramic caps
screamed at 14 KHz and annoyed folks, so I bumped the frequency up.)

https://dl.dropbox.com/u/53724080/PCBs/T680_PCB.JPG

It's a 5-channel TDC/time stamper with 12 picosecond resolution and 48
bit range.

This week's project is a 32-channel magnetic field mapper with USB
interface.

Show us something you've designed.


--

John Larkin Highland Technology, Inc

jlarkin at highlandtechnology dot com
http://www.highlandtechnology.com

Precision electronic instrumentation
Picosecond-resolution Digital Delay and Pulse generators
Custom laser drivers and controllers
Photonics and fiberoptic TTL data links
VME thermocouple, LVDT, synchro acquisition and simulation

 

[tm]

<soar2morrow@yahoo.com> wrote in message
news:7b674a63-5a6e-44a8-b6b5-f4429ba1e14a@googlegroups.com...
On Monday, October 22, 2012 11:31:31 AM UTC-7, bloggs.fred...@gmail.com
wrote:

On Monday, October 22, 2012 11:50:37 AM UTC-4, John Larkin wrote:







I can't believe an engineer wrote the above. You are an engineer,
right?







Obviously not.





What's obvious is that you and that other simpleton are not very good at
engineering. In the real world, outside your sheltered little lab
environment, there are a multitude of effects that degrade predicted
performance. Until the price of Si flat panles dropped, the Solyndra
design was best in class.

http://www.solyndra.com/technology-products/cylindrical-module/

John asked you a very easy question to answer: are you or are you not an
engineer?
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++=


And how much is the oboma campaign paying you to spam the newsgroups?

 

On Monday, October 22, 2012 11:31:31 AM UTC-7, bloggs.fred...@gmail.com wrote:

On Monday, October 22, 2012 11:50:37 AM UTC-4, John Larkin wrote:







I can't believe an engineer wrote the above. You are an engineer, right?







Obviously not.





What's obvious is that you and that other simpleton are not very good at engineering. In the real world, outside your sheltered little lab environment, there are a multitude of effects that degrade predicted performance. Until the price of Si flat panles dropped, the Solyndra design was best in class.

http://www.solyndra.com/technology-products/cylindrical-module/

John asked you a very easy question to answer: are you or are you not an engineer?

 

On Monday, October 22, 2012 3:30:23 PM UTC-4, John Larkin wrote:

On Mon, 22 Oct 2012 11:31:31 -0700 (PDT),

bloggs.fredbloggs.fred@gmail.com wrote:



On Monday, October 22, 2012 11:50:37 AM UTC-4, John Larkin wrote:







I can't believe an engineer wrote the above. You are an engineer, right?







Obviously not.





What's obvious is that you and that other simpleton are not very good at engineering. In the real world, outside your sheltered little lab environment, there are a multitude of effects that degrade predicted performance. Until the price of Si flat panles dropped, the Solyndra design was best in class.

http://www.solyndra.com/technology-products/cylindrical-module/



What electronics have you designed lately? Show us.

What have you designed is more pertinent. We see a lot of trial and error hacking but little else.

 

[John Larkin]

On Wed, 24 Oct 2012 12:06:01 -0700 (PDT),
bloggs.fredbloggs.fred@gmail.com wrote:

On Wednesday, October 24, 2012 1:24:45 PM UTC-4, John Larkin wrote:
On Wed, 24 Oct 2012 09:38:44 -0700 (PDT),

bloggs.fredbloggs.fred@gmail.com wrote:



On Monday, October 22, 2012 3:30:23 PM UTC-4, John Larkin wrote:

On Mon, 22 Oct 2012 11:31:31 -0700 (PDT),



bloggs.fredbloggs.fred@gmail.com wrote:







On Monday, October 22, 2012 11:50:37 AM UTC-4, John Larkin wrote:















I can't believe an engineer wrote the above. You are an engineer, right?















Obviously not.











What's obvious is that you and that other simpleton are not very good at engineering. In the real world, outside your sheltered little lab environment, there are a multitude of effects that degrade predicted performance. Until the price of Si flat panles dropped, the Solyndra design was best in class.



http://www.solyndra.com/technology-products/cylindrical-module/







What electronics have you designed lately? Show us.





What have you designed is more pertinent. We see a lot of trial and error hacking but little else.



Look at my web site. We do very little breadboarding, no prototypes.

We go directly from engineering design to manufacturing and the first

article usually works.



This works, with a couple of resistor value changes (unexpected ADC

behavior) and one jumper (a charge pump worked, but the ceramic caps

screamed at 14 KHz and annoyed folks, so I bumped the frequency up.)



https://dl.dropbox.com/u/53724080/PCBs/T680_PCB.JPG



It's a 5-channel TDC/time stamper with 12 picosecond resolution and 48

bit range.



This week's project is a 32-channel magnetic field mapper with USB

interface.



Show us something you've designed.


And just exactly how is any of that design? Sounds more like self-amusement.

Why do you post to s.e.d.? You don't seem to admit that electronic
design actually exists.

But yes, designing electronics is amusing, and the pay's not bad
either. The mapper schematic is almost done, just 7 sheets (hand
drawn, on D-size vellum!)

What do you do? Is it amusing? You don't seem to be very cheerful.


--

John Larkin Highland Technology, Inc

jlarkin at highlandtechnology dot com
http://www.highlandtechnology.com

Precision electronic instrumentation
Picosecond-resolution Digital Delay and Pulse generators
Custom laser drivers and controllers
Photonics and fiberoptic TTL data links
VME thermocouple, LVDT, synchro acquisition and simulation

 

On Wednesday, October 24, 2012 1:24:45 PM UTC-4, John Larkin wrote:

On Wed, 24 Oct 2012 09:38:44 -0700 (PDT),

bloggs.fredbloggs.fred@gmail.com wrote:



On Monday, October 22, 2012 3:30:23 PM UTC-4, John Larkin wrote:

On Mon, 22 Oct 2012 11:31:31 -0700 (PDT),



bloggs.fredbloggs.fred@gmail.com wrote:







On Monday, October 22, 2012 11:50:37 AM UTC-4, John Larkin wrote:















I can't believe an engineer wrote the above. You are an engineer, right?















Obviously not.











What's obvious is that you and that other simpleton are not very good at engineering. In the real world, outside your sheltered little lab environment, there are a multitude of effects that degrade predicted performance.. Until the price of Si flat panles dropped, the Solyndra design was best in class.



http://www.solyndra.com/technology-products/cylindrical-module/







What electronics have you designed lately? Show us.





What have you designed is more pertinent. We see a lot of trial and error hacking but little else.



Look at my web site. We do very little breadboarding, no prototypes.

We go directly from engineering design to manufacturing and the first

article usually works.



This works, with a couple of resistor value changes (unexpected ADC

behavior) and one jumper (a charge pump worked, but the ceramic caps

screamed at 14 KHz and annoyed folks, so I bumped the frequency up.)



https://dl.dropbox.com/u/53724080/PCBs/T680_PCB.JPG



It's a 5-channel TDC/time stamper with 12 picosecond resolution and 48

bit range.



This week's project is a 32-channel magnetic field mapper with USB

interface.



Show us something you've designed.

And just exactly how is any of that design? Sounds more like self-amusement..