Driver to drive?

[mickgeyver]

On Tuesday, February 11, 2014 2:40:43 PM UTC-5, DaveC wrote:

Imagine you are asked to install a used buck-boost transformer. Imagine you

could normally do this in a few minutes. Except if the leads were cut short

such that identifying characters on the leads' insulation were missing.



Identifying 2 leads belonging to any one winding is straightforward ohm meter

work. Maybe use of a ESR meter might help separate the X windings from the H

windings?. But identifying which specific winding is which and which end is

which­­not so straightforward. For me.



How would you go about identifying the windings? Maybe use a Variac to input

voltage to each of the windings then measure the output of the others? What

outputs should I expect at, for example, the H3/H4 winding with a voltage on

H1/H2 winding? How to identify backward connection of a winding?



Are the two H windings identical? The two X windings?



Suggestions welcome.



This is a 208 -> 230 (ie, 12 & 24 v buck-boost voltage) single-phase

autotransformer in N. America.



Thanks.

There was a technique described in EDN (or some such magazine) that used an LCR meter to determine the winding polarities. The inductance would increase for windings in series with correct polarity and decrease when polarity was not correct. I'll try to look it up later and post back.
regards,
Al

 

[hamilton]

On 2/16/2014 8:08 PM, Ralph Barone wrote:

Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:
On Mon, 17 Feb 2014 11:34:07 +1000, "David Eather" <eather@tpg.com.au
wrote:

On Mon, 17 Feb 2014 11:14:49 +1000, Jim Thompson
To-Email-Use-The-Envelope-Icon@on-my-web-site.com> wrote:

On Sun, 16 Feb 2014 18:51:18 -0600, amdx <nojunk@knology.net> wrote:

On 2/16/2014 6:18 PM, Phil Allison wrote:
"amdx"

Paying guessing games with fucking idiots like you is very boring.


BTW: Fuck you.


.... Phil



I think you meant to write Playing.
But that's ok, I can see you're so mad you
can hardly feel the keyboard.
Mikek


Yep. Phil is starting to act like Larkin.

...Jim Thompson

Jim,

And your starting to act like Phil. Let it go for goodness sake. Phil is
a certifiable lunatic with an identifiable anti-social defect (malignant
narcissistic personality disorder). Please aim for something higher.

Larkin is every bit as insane as Phil. It's Larkin who keeps up with
the cheap shots. He just won't stop.

...Jim Thompson

OK, so assuming that that's reality, why are YOU playing along?

We all now that Phil is a 14 year old JD.

Maybe he will learn something before he becomes an adult and has to pay
for his remarks.

 

[Ralph Barone]

Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

On Mon, 17 Feb 2014 11:34:07 +1000, "David Eather" <eather@tpg.com.au
wrote:

On Mon, 17 Feb 2014 11:14:49 +1000, Jim Thompson
To-Email-Use-The-Envelope-Icon@on-my-web-site.com> wrote:

On Sun, 16 Feb 2014 18:51:18 -0600, amdx <nojunk@knology.net> wrote:

On 2/16/2014 6:18 PM, Phil Allison wrote:
"amdx"

Paying guessing games with fucking idiots like you is very boring.


BTW: Fuck you.


.... Phil



I think you meant to write Playing.
But that's ok, I can see you're so mad you
can hardly feel the keyboard.
Mikek


Yep. Phil is starting to act like Larkin.

...Jim Thompson

Jim,

And your starting to act like Phil. Let it go for goodness sake. Phil is
a certifiable lunatic with an identifiable anti-social defect (malignant
narcissistic personality disorder). Please aim for something higher.

Larkin is every bit as insane as Phil. It's Larkin who keeps up with
the cheap shots. He just won't stop.

...Jim Thompson

OK, so assuming that that's reality, why are YOU playing along?

 

[Bill Sloman]

On Wednesday, 19 February 2014 23:57:25 UTC+11, Fednatic wrote:

On Sun, 21 Sep 2008 08:05:26 -0700 (PDT), hans
anybutbush@hotmail.com> wrote:
On Sep 21, 7:19 am, Richard Eich <richard.e...@domain.invalid> wrote:
dagmargoodb...@yahoo.com wrote...
On Sep 20, 7:45 pm, Richard Eich <richard.e...@domain.invalid> wrote:
dagmargoodb...@yahoo.com wrote...
On Sep 20, 6:13 pm, Mike Brown <rocko...@chariot.net.au> wrote:
James Arthur wrote:

<snipped a steaming heap of last year's off-topic political nonsense>

OBAMA pretends to be a socialist but he is the biggest FASCIST of them
> all !

Two things wrong with that statement. The first is that Obama doesn't pretend to be a socialist - he's tolerably liberal, but that's as far as it goes..

The second is that he isn't any kind of Fascist - fascism was not a particularly coherent political philosophy at the best of times, but if you think that he has adopted any of it's tenets, you are severely confused.

EVERYTHING he does is for either the BANKS, HOLLYWOOD or BIG business
and those people getting food stamps and Obama phones are simply too
stupid to realize how far he is selling them down the river.

Obamacare doesn't do anything much for banks, Hollywood or big business. Are you sure that you wouldn't like to think a little harder about that claim?

I'm afraid that you've identified yourself as not merely as a right-wing nitwit, but as a brain damaged right-wing nitwit who doesn't know where and when to gibber.

--
Bill Sloman, Sydney

 

[Fednatic]

On Sun, 21 Sep 2008 08:05:26 -0700 (PDT), hans
<anybutbush@hotmail.com> wrote:

On Sep 21, 7:19 am, Richard Eich <richard.e...@domain.invalid> wrote:
dagmargoodb...@yahoo.com wrote...
On Sep 20, 7:45 pm, Richard Eich <richard.e...@domain.invalid> wrote:
dagmargoodb...@yahoo.com wrote...
On Sep 20, 6:13 pm, Mike Brown <rocko...@chariot.net.au> wrote:
James Arthur wrote:

   c) Aside: you do understand the Nazis were the
Nationalsozialistische Deutsche Arbeiterpartei, the National Socialist
German Workers' Party--they were socialists; lefties. Not
Republicans ;-)

Cheers,
James Arthur

If you believe that the name represented their policies, you are ill
informed.

MJRB

The problem is that people conflate socialism and totalitarianism.
Understandable, since they so often travel together.

Nazism certainly preached envy, and fanned division and discontent
amongst the classes ("class warfare," I call it), familiar "liberal"
refrains today.[1] The organizing theory for both being that "someone
else has what should be yours," and the promise of fixing this.

Mmm, no.  Class warfare is what happened to Marie Antoinette.  <Chop

Rhetoric is merely rhetoric.

Whatever one calls it, it's divisive and unhelpful.

So you called it class warfare and equated it with Nazism, but your
actual point was just that it's divisive and unhelpful?  LMAO.

Hyperbole ruins your credibility with those call you on it.

Far better to
teach people how to lift themselves up than to incite them to envy
others who already have.

Yeah, but envy is a predictable side-effect of a pop culture of
celebrity worship and 'Lifestyles of the Rich and Famous', E!, etc.
-- where the great disparity between those randomly born into extreme
wealth and extreme disadvantage is laid bare.  Even Ayn Rand noted
that her support of inheritable wealth and pure meritocracy created a
fatal contradiction in her philosophy, by allowing a way for the
meritocracy to be bypassed and wealth to be held by those who didn't
themselves directly earn it (and whom would be unable to earn it, if
left to the forces of meritocracy).

So you can hardly blame some of those on the shit end of that stick
for rightfully resenting the game being rigged by luck of birth; it's
a valid emotional response.  It motivates different people in
different ways.

Even so, it isn't the Democratic Party that is inciting anyone to
envy.  It's the giants of the entertainment industry.

The latter is unproductive.

Before you can drop proclimations, you first have to show your work.  
What are your metrics for measuring unproductivity?

Current example: the idea of lowering 95% of a nation's load, while
increasing it for the remaining 5%. A popular, and populist idea
common to both ideologies.  ("The government that robs Peter to pay
Paul can always depend on the support of Paul." -- G.B. Shaw)

From 1972 to 2001, the income of the 99.99th percentile rose 437%.  
Given that taxes are a royalty paid on the benefit one obtains from
the socioeconomic system we all share, it seems appropriate that the
taxation is most properly biased towards the top.

FWIW, that's just 5.2% compounded annually for 29 years.

Non-sequitur.  Anyway, I just re-checked my numbers; it was 497%.

The 99th percentile's income in the same period rose 87%.  Below that
percentile, income growth is negative over the same period.

But I don't agree that taxes are a royalty, or that they reflect one's
share of benefit from society.

No, you probably equate taxes with class warfare and Nazism...even
though you've changed my words and created a strawman.  I said the
socio-economic system we call share, not simply "society" which is a
cultural artifact not an economic one.  Stop with the fallacies, eh?

Nonetheless, taxes sustain the social stability that we all use and
benefit from to greater or lesser degree.  The quantification of that
benefit is income and net worth.  It's pretty easy to see who is
benefitting, in an unambiguous way.  The benefit would not be able to
be obtained without the socio-economic struture.

And the idea that the elite should pay for everyone else's benefits--

Another strawman.  We all pay, in proportion to our benefit.

which is the actual effect--would mean only the elite would have all
the influence and power. Surely that isn't and couldn't be good.

"Those who derive the benefit must bear the burden." -- common law
maxim.

"From each according to his ability, to each according to his needs."
--Karl Marx

These two quotes are expressing widely different thoughts, dude.  

It's hard to tell what the Nazis' actual economic policy was, since
neither they nor their philosophy ever really generated any economic
activity besides war.

Well then, without a peek at their economic policies one can't really
refer to them as economic "socialists" can one?  I mean, really.

The Nazis' professed policy was socialism.  And they pointed fingers
at people they thought were too rich and took it from them. So, if not
Socialism(tm), a flavor of socialism anyhow.

This is a distortion of history.  

Back to the original troll's contention, Republicans are not Nazis,
and the comparison doesn't prove it.  It was silly.

There's an element of the Republican Party that has facist
tendencies, however.  That's not silly.

Cheers,
James Arthur

--
One nation, under surveillance.

"President Obama" -- say it every chance you can.

Richard, very well stated post. Thanks.

In fact the comment about J. Arthur's suggestion about Nazism being
socialism and how wrong that is deserves some eleboartion, I think.

Just because the name for Nazi party included the word socialism does
not make them any more socialist than the Bush/Cheney/Rove fascists
propaganda about compassionate conservativism making it true. There is
no compassion in the neocon platform of discrimination against non-
Christians, those within the admin. who don;t carry the party line
(there are many examples of people who have been fired or passed over
when deserved in favor of friends/chronies - think Brownie - or the
firing of the Justice lawyers), against special needs kids in schools
whose programs have been pilloried in favor of the No Childs Behind Is
Left program, the fascist reading of public school library computer
contents by private citizens, etc, etc, etc.

The Nazis did not express and develop socialism as it could have been.
Therefore the US thinks socialism is terrible without understanding
the basic tenets.

Unregulated private enterprise has been the economic policy of
Reaganomics and maybe you neocons have noticed the result. Therefore,
under the socialism-is-bad-policy association, you would put private
enterprise on the list of to -be-avoided policies. Prob not.

hans

OBAMA pretends to be a socialist but he is the biggest FASCIST of them
all !

EVERYTHING he does is for either the BANKS, HOLLYWOOD or BIG business
and those people getting food stamps and Obama phones are simply too
stupid to realize how far he is selling them down the river.

 

[don hindenach]

On Wed, 19 Feb 2014 20:57:25 +0800
Fednatic <fednatic@gmail.com> wrote:

On Sun, 21 Sep 2008 08:05:26 -0700 (PDT), hans
anybutbush@hotmail.com> wrote:

On Sep 21, 7:19 am, Richard Eich <richard.e...@domain.invalid> wrote:
dagmargoodb...@yahoo.com wrote...
On Sep 20, 7:45 pm, Richard Eich <richard.e...@domain.invalid> wrote:
dagmargoodb...@yahoo.com wrote...
On Sep 20, 6:13 pm, Mike Brown <rocko...@chariot.net.au> wrote:
James Arthur wrote:

   c) Aside: you do understand the Nazis were the
Nationalsozialistische Deutsche Arbeiterpartei, the National Socialist
German Workers' Party--they were socialists; lefties. Not
Republicans ;-)

Cheers,
James Arthur

If you believe that the name represented their policies, you are ill
informed.

MJRB

The problem is that people conflate socialism and totalitarianism.
Understandable, since they so often travel together.

Nazism certainly preached envy, and fanned division and discontent
amongst the classes ("class warfare," I call it), familiar "liberal"
refrains today.[1] The organizing theory for both being that "someone
else has what should be yours," and the promise of fixing this.

Mmm, no.  Class warfare is what happened to Marie Antoinette.  <Chop

Rhetoric is merely rhetoric.

Whatever one calls it, it's divisive and unhelpful.

So you called it class warfare and equated it with Nazism, but your
actual point was just that it's divisive and unhelpful?  LMAO.

Hyperbole ruins your credibility with those call you on it.

Far better to
teach people how to lift themselves up than to incite them to envy
others who already have.

Yeah, but envy is a predictable side-effect of a pop culture of
celebrity worship and 'Lifestyles of the Rich and Famous', E!, etc.
-- where the great disparity between those randomly born into extreme
wealth and extreme disadvantage is laid bare.  Even Ayn Rand noted
that her support of inheritable wealth and pure meritocracy created a
fatal contradiction in her philosophy, by allowing a way for the
meritocracy to be bypassed and wealth to be held by those who didn't
themselves directly earn it (and whom would be unable to earn it, if
left to the forces of meritocracy).

So you can hardly blame some of those on the shit end of that stick
for rightfully resenting the game being rigged by luck of birth; it's
a valid emotional response.  It motivates different people in
different ways.

Even so, it isn't the Democratic Party that is inciting anyone to
envy.  It's the giants of the entertainment industry.

The latter is unproductive.

Before you can drop proclimations, you first have to show your work.  
What are your metrics for measuring unproductivity?

Current example: the idea of lowering 95% of a nation's load, while
increasing it for the remaining 5%. A popular, and populist idea
common to both ideologies.  ("The government that robs Peter to pay
Paul can always depend on the support of Paul." -- G.B. Shaw)

From 1972 to 2001, the income of the 99.99th percentile rose 437%.  
Given that taxes are a royalty paid on the benefit one obtains from
the socioeconomic system we all share, it seems appropriate that the
taxation is most properly biased towards the top.

FWIW, that's just 5.2% compounded annually for 29 years.

Non-sequitur.  Anyway, I just re-checked my numbers; it was 497%.

The 99th percentile's income in the same period rose 87%.  Below that
percentile, income growth is negative over the same period.

But I don't agree that taxes are a royalty, or that they reflect one's
share of benefit from society.

No, you probably equate taxes with class warfare and Nazism...even
though you've changed my words and created a strawman.  I said the
socio-economic system we call share, not simply "society" which is a
cultural artifact not an economic one.  Stop with the fallacies, eh?

Nonetheless, taxes sustain the social stability that we all use and
benefit from to greater or lesser degree.  The quantification of that
benefit is income and net worth.  It's pretty easy to see who is
benefitting, in an unambiguous way.  The benefit would not be able to
be obtained without the socio-economic struture.

And the idea that the elite should pay for everyone else's benefits--

Another strawman.  We all pay, in proportion to our benefit.

which is the actual effect--would mean only the elite would have all
the influence and power. Surely that isn't and couldn't be good.

"Those who derive the benefit must bear the burden." -- common law
maxim.

"From each according to his ability, to each according to his needs."
--Karl Marx

These two quotes are expressing widely different thoughts, dude.  

It's hard to tell what the Nazis' actual economic policy was, since
neither they nor their philosophy ever really generated any economic
activity besides war.

Well then, without a peek at their economic policies one can't really
refer to them as economic "socialists" can one?  I mean, really.

The Nazis' professed policy was socialism.  And they pointed fingers
at people they thought were too rich and took it from them. So, if not
Socialism(tm), a flavor of socialism anyhow.

This is a distortion of history.  

Back to the original troll's contention, Republicans are not Nazis,
and the comparison doesn't prove it.  It was silly.

There's an element of the Republican Party that has facist
tendencies, however.  That's not silly.

Cheers,
James Arthur

--
One nation, under surveillance.

"President Obama" -- say it every chance you can.

Richard, very well stated post. Thanks.

In fact the comment about J. Arthur's suggestion about Nazism being
socialism and how wrong that is deserves some eleboartion, I think.

Just because the name for Nazi party included the word socialism does
not make them any more socialist than the Bush/Cheney/Rove fascists
propaganda about compassionate conservativism making it true. There is
no compassion in the neocon platform of discrimination against non-
Christians, those within the admin. who don;t carry the party line
(there are many examples of people who have been fired or passed over
when deserved in favor of friends/chronies - think Brownie - or the
firing of the Justice lawyers), against special needs kids in schools
whose programs have been pilloried in favor of the No Childs Behind Is
Left program, the fascist reading of public school library computer
contents by private citizens, etc, etc, etc.

The Nazis did not express and develop socialism as it could have been.
Therefore the US thinks socialism is terrible without understanding
the basic tenets.

Unregulated private enterprise has been the economic policy of
Reaganomics and maybe you neocons have noticed the result. Therefore,
under the socialism-is-bad-policy association, you would put private
enterprise on the list of to -be-avoided policies. Prob not.

hans


OBAMA pretends to be a socialist but he is the biggest FASCIST of them
all !

EVERYTHING he does is for either the BANKS, HOLLYWOOD or BIG business
and those people getting food stamps and Obama phones are simply too
stupid to realize how far he is selling them down the river.

moo

--
-donh-
donh at audiosys dot com

 

[Anthony Stewart]

All fuses are rated according to their impulse capability in terms of I^2t because their cold resistance varies with rating. But the true power calculation is I*2Rt.

Every protection device must have a time constant faster than the failure mode it is protecting, which implies a smaller mass or accelerated by magnetic or thermal forces.

I can remember blowing breakers due to induction motors starting up and wish I had a better means to control the starting current at the expense of starting torque or no-load waiting time while getting up to speed.

Other than a variable speed controller, a simple solution is s thermal breaker which ought to be embedded in the motor assembly. In the early days a fan fail circuit that might overheat with s stuck rotor consisted of a heater resistor and bi-metallic strip bonded together in line with air flow. Now you can use a PTC which regulates to 85'C upon short circuit and thus resistance and power depends on max sustained current for required voltage and size.

In this case I suspect, you have two reasons;
1) to avoid false tripping due to over-sensitive slow-blow fuses
2) provide safety by reaching 85'C faster than any bad contact. This is hard to predict if your wiring has or will have any bad connections.

There are standards for thermal breakers for I^2t time constants and is your best bet, albeit may be a little expensive for 2phase breaker.

Another alternative are PTC's which may be ganged in parallel if thermally coupled but exposed to air for rapid resettable air fuse characteristics. They regulate to 85'C on short circuit but run cool in normal operation due to several decade range in variable resistance.

You might consider two (2x) 4 Amp PTC's in parallel, where 4 Amp is the trip current which is 2x the Hold current and trips in < 30 sec @ 5x hold current rating. Verify specs if this works for you. Cost $2.84 each. 0.5" pitch radial capacitor-like thin body using metal oxide material in epoxy... I think this is what they use in DC motors for cars such as for power windows.. Include voltage margin to rating.

http://tinyurl.com/mojfzes < Digikey ships overnight.

 

[Mike]

In article <a43eccd0-cf56-43ef-8804-6c536cac8ea3@googlegroups.com>,
<haiticare2011@gmail.com> wrote:

Raspberry Pi with a camera card.

2. The board has 512 mb to store the images.

The board has 512MB system memory *total*, there's memory consumed
by running Linux, your apps, and part of it is reserved and used by the GPU.

You may wish to find somewhere to offload the images to. The SD card you boot
from (that holds the Linux OS/files/swap space) can be Gigabytes large, so that's
one answer, or you could force them over a wired/wireless network to another computer.

>5. The board has wifi for internet

Not built in, you need to add a USB WIFI dongle, and you may need a powered hub
for it to work, current on the USB ports is limited.

>9. The camera can sense NIR if a filter is removed.

There are two versions of the camera, the regular one, and the "NOIR"
model, which has the filter factory not-fitted

--
--------------------------------------+------------------------------------
Mike Brown: mjb[-at-]signal11.org.uk | http://www.signal11.org.uk

--- news://freenews.netfront.net/ - complaints: news@netfront.net ---

 

[Anthony Stewart]

although avery old thread, from my HVAC and HVDC testing, HVDC is easier to see partial discharge due to particulate matter that transports charges towards conductive surface and detonates with extremely high energy density thus heating up and medium around and usually triggers a faster pulse rate from 1ppm towards 1pps and then 10 to 100 pps. the rate of change of voltage accelerates the PD activity. when outside , it is usually called corona where contamination and corresponding current levels are higher. Breakdown occurs when kinetic energy in a gap, void or particle exceeds the barrier Potential Energy. the barrier is affected by external energy levels which are proprtional to wavelength of particles or light.

the AC field and energetic particles create a DC static electrification, which can result in PD or ESD like current pulses that creat broad spectral noise since rise time can be from 1 pico to 1 nano second . thus Faraday shielding is very important.

 

On Saturday, March 1, 2014 10:23:53 AM UTC-5, Mike wrote:

In article <a43eccd0-cf56-43ef-8804-6c536cac8ea3@googlegroups.com>,

haiticare20161@gmail.com> wrote:

Raspberry Pi with a camera card.



2. The board has 512 mb to store the images.



The board has 512MB system memory *total*, there's memory consumed

by running Linux, your apps, and part of it is reserved and used by the GPU.



You may wish to find somewhere to offload the images to. The SD card you boot

from (that holds the Linux OS/files/swap space) can be Gigabytes large, so that's

one answer, or you could force them over a wired/wireless network to another computer.



5. The board has wifi for internet



Not built in, you need to add a USB WIFI dongle, and you may need a powered hub

for it to work, current on the USB ports is limited.



9. The camera can sense NIR if a filter is removed.



There are two versions of the camera, the regular one, and the "NOIR"

model, which has the filter factory not-fitted



--

--------------------------------------+------------------------------------

Mike Brown: mjb[-at-]signal11.org.uk | http://www.signal11.org.uk



--- news://freenews.netfront.net/ - complaints: news@netfront.net ---

The main negative I have learned about this system is they throw away 2/3 of
the pixel information to massage the image for a pleasant look and feel.

 

[Jan Panteltje]

On a sunny day (Fri, 7 Mar 2014 03:54:00 -0800 (PST)) it happened
haiticare2011@gmail.com wrote in
<185ab285-f212-473e-9b04-6b3665d0e6e8@googlegroups.com>:

On Saturday, March 1, 2014 10:23:53 AM UTC-5, Mike wrote:
In article <a43eccd0-cf56-43ef-8804-6c536cac8ea3@googlegroups.com>,

haiticare20161@gmail.com> wrote:

Raspberry Pi with a camera card.



2. The board has 512 mb to store the images.



The board has 512MB system memory *total*, there's memory consumed

by running Linux, your apps, and part of it is reserved and used by the GPU.



You may wish to find somewhere to offload the images to. The SD card you boot

from (that holds the Linux OS/files/swap space) can be Gigabytes large, so that's

one answer, or you could force them over a wired/wireless network to another computer.



5. The board has wifi for internet



Not built in, you need to add a USB WIFI dongle, and you may need a powered hub

for it to work, current on the USB ports is limited.

Not only that, there are severe throughput restrictions on the USB,
to the point you cannot use a USB keyboard without it dropping characters all the time, useless.
So I use it with ssh -y pi@SOMEWHERE_IP via ethernet from an other PC.
If you lookup (google) the Raspi and USB problems you will find more about it.
I am not against Raspi, on the contrary, I have one in use all day as PIC programmer and development system.
and other one to control a big LED matrix display, or play HD (720 progressive) movies of the teevee via the HDMI.
As a camera I tried my ethernet webcams on it, and it works, but then again processing power is limited.
But then, for the same price as that Raspi camera you have pan and tilt and adjustable focus, and IR and sound.
Not HD though.. But seriously you need a real camera for that,
I would not even dream of doing real time image procssing on the Pi, but if someone can do ii hope he/she will let us know.

9. The camera can sense NIR if a filter is removed.



There are two versions of the camera, the regular one, and the "NOIR"

model, which has the filter factory not-fitted



--

--------------------------------------+------------------------------------

Mike Brown: mjb[-at-]signal11.org.uk | http://www.signal11.org.uk



--- news://freenews.netfront.net/ - complaints: news@netfront.net ---

The main negative I have learned about this system is they throw away 2/3 of
the pixel information to massage the image for a pleasant look and feel.

I dunno about that, but it likely is yuv and not RGB.
Bandwidth problem.

 

I dunno about that, but it likely is yuv and not RGB.

Bandwidth problem.

hmmm mmm mmm mmm

I guess you know the Camera they sell does not use the USB, but a parallel bus?
My needs are not full RT, and if I were to do RT, with my state of knowledge
and skill, I might try to catch the bit train on the fly - to do RT processing
you would need the whole image in memory, and with this technology,
that is not RT by definition.
For my needs, just being able to move around the image in memory is enough.

BUT...I am always looking for cheaper, simpler solutions. There are several
things I can't get enough of. They are control of camera exposure, bit depth of
pixels mainly. If you have any interestig solutions, let me know, and I'll be
grateful.

The Pi camera can get 3000x2000 (dont hold me to that number) snapshots 30 fps,
and stick them in memory. I am concerned thy step on the bits, but for the
money,I've not seen anything as good. - limited survey of course.

For example, I'd like to get a system which uses an Atmel mcu or similar to
control a camera board. Alberto Ricci Bitti had a nice design that used an
omivision board, but it was done in 2006, and the board is now a bit scarce.

Any ideas welcome.
jb

 

[Jan Panteltje]

On a sunny day (Fri, 7 Mar 2014 12:04:00 -0800 (PST)) it happened
haiticare2011@gmail.com wrote in
<adec54a1-5dc2-4b85-99a9-5105bc1f8a29@googlegroups.com>:

I dunno about that, but it likely is yuv and not RGB.

Bandwidth problem.


hmmm mmm mmm mmm

I guess you know the Camera they sell does not use the USB, but a parallel bus?

Yes, my comment was on the USB deficiencies I encountered.
USB seems to work OK with a USB to serial adaptor at 19200 Bd though.
A E2500 Logitech USB webcam worked (low res) but could hardly get 1 fps.
Could be a driver problem too, they keep changing (Linux) video stuff.

Yes that camera is on the par bus, and yes it is HD, and YES it is a propriety driver.

None of my USB webcams works right on Raspi (if at all).
I have a USB digitizer that does not work right with this kernel driver version, else I could run some analog PAL cams.

The only thing that actually workeed is this on the ethernet connection:
http://panteltje.com/panteltje/mcamip/
That driver has support for the cheap Chinese pan tilt IR webcams now too.

It can stream YUV, add on screen time, motion detection, wrote it years ago.
If you can write C code you could use it as a basis, as it [the software] is 100% pixel oriented,
but I dunno what you want to do and can do.
Maybe you can grab in the same way from memory with that Raspi cam,
but I did not like the fixed focus (impossible to get close), flimsy mechanical (or absence of mechanical) system,
and propriety code.
mcamp is open source and does not use any 'driver', just uses the camera jpeg output stream (that I hacked),
so it uses libjpeg.
If jpeg compression is already decreasing perfoprmance for your applicatoon that it is a nono,
then why not just buy a decent sensor chip and make your own camera?
Nothing magical about it, those chips are usually i2c or so interfaced.

My needs are not full RT, and if I were to do RT, with my state of knowledge
and skill, I might try to catch the bit train on the fly - to do RT processing
you would need the whole image in memory, and with this technology,
that is not RT by definition.
For my needs, just being able to move around the image in memory is enough.

BUT...I am always looking for cheaper, simpler solutions. There are several
things I can't get enough of. They are control of camera exposure, bit depth of
pixels mainly. If you have any interestig solutions, let me know, and I'll be
grateful.

The Pi camera can get 3000x2000 (dont hold me to that number) snapshots 30 fps,
and stick them in memory. I am concerned thy step on the bits, but for the
money,I've not seen anything as good. - limited survey of course.

What is 'step on the bits?'

For example, I'd like to get a system which uses an Atmel mcu or similar to
control a camera board. Alberto Ricci Bitti had a nice design that used an
omivision board, but it was done in 2006, and the board is now a bit scarce.

Any ideas welcome.
jb

I have problems with a reality check here,
if that camera does 30 fps at 3000x2000 RGB that makes 30*3000*2000*3 = 540,000,000 bytes per second
540 MB memory needed for 1 (_ONE_) frame and a 1 GHz processor, of course that camera does not do that,
At the best it (the propriety driver) does jpeg compression too, and uses YUV, and divide pixels by 3 so MAYBE 1000x2000 encoded YUV.
so now you payed for?
And then real time processing, well to get an idea a dual core many GHz has problems with that with a normal frame size,
and then waht do you want to to in 1/30 second? Nothing complicated I hope.
But like i said:
If somebody does it I hope they release code, I am curious.

Did I goof on the math?

 

[gregz]

DaveC <invalid@invalid.net> wrote:

Looking for the manufacturer and (praying) the series of this connector:

http://oi57.tinypic.com/w7luea.jpg

http://oi57.tinypic.com/2hylbub.jpg

It is not proprietary‹it was used to connect 2 old pieces of equipment much
older than this connector.

Ideas?

Thanks.

Can't tell size, but looks like cinch 2404

Greg

 

John Larkin <jjlarkin@highnotlandthistechnologypart.com> wrote:

My older Fuji cam didn't need driver installs, and just opened on any
PC as a generic USB memory stick, with the images inside. This new one
needs a driver install to work on any PC.

The USB digital cameras I've used from the mid-00s just appeared to the
PC like a USB flash drive. You could also take out the card, stick it
in a card reader, and see it as a FAT32 filesystem with JPEGs on it.

I have a Nikon Coolpix L20 from about 2009 that implements "Picture
Transfer Protocol". When connected to a PC, it doesn't show up like a
USB flash drive. You need a program that speaks PTP to retrieve the
files from it. I use gtkam on Linux, and I think Microsoft's "Scanner
and Camera Wizard" on XP (or whatever it morphed into on later Windows)
can do it as well. gtkam gives me a "directory tree" view, optionally
with thumbnails. I can select a bunch of pictures and say "download
these", and a little while later I have a bunch of JPEGs sitting on my
hard drive.

I also have the option of pulling out the SD card and sticking it into
a reader. It has to be an SDHC reader for 4 GB or greater SD cards
(and, I guess, an SDXC reader for 32 GB or greater SD cards). When I do
that, it shows up as a plain old FAT32 filesystem with JPEGs on it.

So: You might look for a camera that *doesn't* speak PTP, or that can
have it turned off.

Something else to look out for: Because the entire world could read and
write FAT32, Microsoft introduced a new proprietary and patented
filesystem, exFAT. You have to pay protection money to Microsoft to
implement it, at least in the US. Some newer digital cameras (2012-up)
may want to use this format on their cards. If you always use the
camera as the card reader, you will be OK. If you only ever plug the
card directly into recent Windows (Vista and up, XP with a patch) or OS
X (10.6.5 and up) machines, you will be OK. If you want to plug the
card into something else, you may have trouble.

Matt Roberds

 

[Jan Panteltje]

On a sunny day (Sun, 23 Mar 2014 19:12:29 -0700) it happened John Larkin
<jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in
<gk4vi99n62523ftc7t2354vnb6kr550fkq@4ax.com>:

I got a Fuji AX650 as a cheap vacation type camera.

My older Fuji cam didn't need driver installs, and just opened on any PC as a
generic USB memory stick, with the images inside. This new one needs a driver
install to work on any PC. Once that is done, images will only open into the
stupid Microsoft media viewer. You can't even drag/drop a jpeg file into
Irfanview. Why would they do that?

Back it goes.

Anybody know which brands/cams operate rationally, as a plain memory stick
interface on any PC?

There are SDcard for in cameras with WiFi these days,
and cameras with WiFi too I think.
In my Canon I just take out the sdcard and put it in the PC..
Maybe the lid wil wear out some day, I like that camera

 

[Jasen Betts]

On 2014-03-24, Robert Baer <robertbaer@localnet.com> wrote:

if (isIE>0) { window.location.replace('PCbase.html'); }
if (isMozilla>=0) { window.location.replace('PCbase.html'); }
if (ch>=0) { window.location.replace('PCbase.html'); } // for Chrome

// window.location.replace('Mobile.html');


If i un-comment that last window.location.replace line, the proper
execution of going to PCbase.html fails, and i get Mobile.html instead.

How can this be fixed?

you could use some elses between the ifs or a temporary variable, but the
easiest is probably just to put it first!

window.location.replace('Mobile.html');
if (isIE>0) { window.location.replace('PCbase.html'); }
if (isMozilla>=0) { window.location.replace('PCbase.html'); }
if (ch>=0) { window.location.replace('PCbase.html'); } // for Chrome

javascript doesn't execute in parallell with the rest of the browser, the page
doesn't reload until the script ends, so the last value of location wins.



--
umop apisdn


--- news://freenews.netfront.net/ - complaints: news@netfront.net ---

 

[Martin Brown]

On 24/03/2014 02:12, John Larkin wrote:

I got a Fuji AX650 as a cheap vacation type camera.

My older Fuji cam didn't need driver installs, and just opened on any PC as a
generic USB memory stick, with the images inside. This new one needs a driver

ACtually it probably did but was silent about installing it and/or it
looked close enough to the generic driver to work with the default. The
price for ever more complex devices is that they need custom drivers.

install to work on any PC. Once that is done, images will only open into the
stupid Microsoft media viewer. You can't even drag/drop a jpeg file into
Irfanview. Why would they do that?

Most of them will mount as a mass storage device if you use the right
settings so RTFM. Just as expensive DSLRs will work with legacy lenses
but not with the out of the box settings (maker wants to sell new kit).

Back it goes.

Anybody know which brands/cams operate rationally, as a plain memory stick
interface on any PC?

Actually an interface that offers to download all new photos when you
plug the camera in isn't such a bad design (that is what Canon does).
Why should you need to drag and drop stuff over manually?

The Mickeysoft media viewer is pretty naff though and a strange choice.
You should be able to override which app opens files by using Irfanview
to grab back the extensions that the installer has mutilated.

I won't even attempt to defend ugly installer software that tramples on
existing registry settings with a me-*me*-ME-*ME* attitude! I also find
software by major players that is not digitally signed very annoying...

--
Regards,
Martin Brown

 

[Martin Riddle]

On Sun, 23 Mar 2014 19:12:29 -0700, John Larkin
<jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

I got a Fuji AX650 as a cheap vacation type camera.

My older Fuji cam didn't need driver installs, and just opened on any PC as a
generic USB memory stick, with the images inside. This new one needs a driver
install to work on any PC. Once that is done, images will only open into the
stupid Microsoft media viewer. You can't even drag/drop a jpeg file into
Irfanview. Why would they do that?

Back it goes.

Anybody know which brands/cams operate rationally, as a plain memory stick
interface on any PC?

My little Canon works just like a USB stick.

Cheers

 

[Jim Thompson]

On Mon, 24 Mar 2014 08:12:10 -0400, Martin Riddle
<martin_rid@verizon.net> wrote:

On Sun, 23 Mar 2014 19:12:29 -0700, John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

I got a Fuji AX650 as a cheap vacation type camera.

My older Fuji cam didn't need driver installs, and just opened on any PC as a
generic USB memory stick, with the images inside. This new one needs a driver
install to work on any PC. Once that is done, images will only open into the
stupid Microsoft media viewer. You can't even drag/drop a jpeg file into
Irfanview. Why would they do that?

Back it goes.

Anybody know which brands/cams operate rationally, as a plain memory stick
interface on any PC?

My little Canon works just like a USB stick.

Cheers

Same with my Olympus.

Looks like Larkin includes User Manuals in his "crutch" demeanor >:-}

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.