Driver to drive?

On Tuesday, 29 October 2013 07:15:25 UTC+11, Greegor wrote:
BS > It isn't laziness to want to be part
BS > of a system where everybody is working
BS > close to as effectively as they can.

G > Coming from you, Slowman, that's funny.

BS > It's actually sad. I'm perfectly certain
BS > that I'm not working as effectively as
BS > I might, and I'd love to be a member of
BS > a system which could manage to offer me
BS > a job. Sadly, most people think that if
BS > you are 70 you should be happy to be retired.

The reason you're so very fond of socialism
is that you are not a producer, and haven't
been for many years. Under actual socialism
however, you would be sweeping streets or
cleaning toilets.

The Netherlands represents what "actual socialism" looks like today, and there was never any suggestion that I ought to be applying for menial jobs. When I did apply for jobs where I was marginally over-qualified, I never even got to interview (which I did from time to time with jobs which did match my skills and experience).

Capitalism wouldn't insult your huge ego by
asking you to do such lowly tasks, Slowman.

Perhaps, but capitalism is supposed to be about the efficient allocation of resources, and using me a menial would be wasteful. Having me doing nothing is even more wasteful, but no system is 100% perfect.

--
Bill Sloman, Sydney
 
On Tuesday, 29 October 2013 10:14:23 UTC+11, Greegor wrote:
JT > I think I'll just become a wino >:-}

Have the socialists come up with a job code for that yet?

Having grown up in family businesses
and having managed small businesse
I was quite accustomed to menial duties.

Then I worked at one company where
I was asked to collect the garbage
one day and I thought nothing of it
until I noticed that other people
at the company sneered and acted
snotty, even asserted that I must
not be a professional since I was
willing to do trash rounds.

I got a similar response in the UK around 1975, when I needed a letter typed in a hurry, and did it on an unused typewriter in the typing pool.Very odd.
Australians tend not to see jobs as caste-marked.

Under capitalism, Slowman is known
for the worthless putz he really is.

I'm 70 and retired - in the current job market employers can prefer to hire younger candidates, which certainly makes me worthless at the moment. An object is worth what somebody is willing to pay for it.

As for being a putz - responding to your inane and misleading posts is obviously putzing around.

Socialism appeals to Slowman because
he thinks socialists would make maximum
use of his enormous ego, but even they
would recognize what a putz he truly is.

I was in work for half my time in the Netherlands, so they took a while to recognise how worthless I was - in fact they didn't declare me to be worthless until I turned 60, which I see as ageism rather than socialism.

An enormous ego might survive ten years of rejection letters, but I've no reason to believe that mine is in any way exceptional - I certainly don't like getting them, but I keep on sending off the job-application e-mails anyway.

--
Bill Sloman, Sydney
 
On Mon, 28 Oct 2013 13:50:01 -0700 (PDT), dagmargoodboat@yahoo.com
wrote:

On Monday, October 28, 2013 4:15:25 PM UTC-4, Greegor wrote:
Under actual socialism
however, you would be sweeping streets or
cleaning toilets.

I've thought of doing that--something menial, possibly
out-of-doors. There's no shame in it--all honest labor
is honorable.

Sometimes, when I'm up at dawn to handle the workload, I spy the
garbage truck driver... drive up to my "container", robotically pick
it up and dump it into the truck, then gently sit it down on the side
walk... brain not taxed in the slightest... and you're right...
honorable labor.

We could take former Speaker Pelosi's advice and all become
artists. Few late nights, free Obamacare, EBT, etc. Steady
money, for just being the fabulous people we already are...

IOW, WIJG?

Cheers,
James Arthur

I think I'll just become a wino >:-}

...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 | |
| Voice:(480)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.
 
On Sun, 27 Oct 2013 20:29:18 -0700 (PDT), dagmargoodboat@yahoo.com
wrote:

On Sunday, October 27, 2013 8:14:01 PM UTC-4, k...@attt.bizz wrote:
On Sun, 27 Oct 2013 10:19:50 -0700 (PDT), dagmargoo..@yahoo.com
wrote:
On Saturday, October 26, 2013 3:22:59 AM UTC-4, Greegor wrote:
bloggs.fred wrote

God forbid the government should require people to budget responsibly!

A government that can't budget diddly
intends to advise citizens on how to
budget?

Not advise, overrule.

Command.

Yes, but that's not as punny.

Kinda the opposite of "by the People," eh?

The Constitution is such an anachronism. If the US were China,
Obama's job would be so much easier.
 
On Monday, October 28, 2013 6:18:12 PM UTC-4, Jim Thompson wrote:
On Mon, 28 Oct 2013 13:50:01 -0700 (PDT), dagmarg... wrote:
On Monday, October 28, 2013 4:15:25 PM UTC-4, Greegor wrote:

Under actual socialism
however, you would be sweeping streets or
cleaning toilets.

I've thought of doing that--something menial, possibly
out-of-doors. There's no shame in it--all honest labor
is honorable.


Sometimes, when I'm up at dawn to handle the workload, I spy the
garbage truck driver... drive up to my "container", robotically pick
it up and dump it into the truck, then gently sit it down on the side
walk... brain not taxed in the slightest... and you're right...
honorable labor.

We could take former Speaker Pelosi's advice and all become
artists. Few late nights, free Obamacare, EBT, etc. Steady
money, for just being the fabulous people we already are...

IOW, WIJG?


I think I'll just become a wino >:-}
O
o o
o.
. \ /
:)-)->--<
/ \
Ch^H^HBeers,

James Arthur
 
The Daring Dufas wrote:
[...] A Conservative is a Liberal who's been sodomized by the government and wasn't too drunk to remember what happened, doesn't like it and doesn't want it happening again to him or anyone else. Liberals who stay Liberal after being sodomized are the weird ones who like it and want to forcibly share the experience with everyone else. ^_^ TDD
---

Colorful but yes.
 
PaxPerPoten wrote:
PpP > Information for Ignorant assholes
PpP > like you... My state has a balanced
PpP > budget and has no debt!! We buy
PpP > only what we can afford. You sure
PpP > as Hell cannot say that for the
PpP > lame asshole in DC.

Bob F wrote:
BF > I bet your state is one of the Repub
BF > leach states that gets more money
BF > from the feds than they pay
BF > in federal taxes too.

Please LIST those states so they
can get the credit!

If there is a state smart enough
to pull off what you claim, shouldn't
you tell everybody how smart they are?

PpP > by the way ..we also sell more
PpP > product to China then we buy from them.

Really! You are funny!
http://www.census.gov/foreign-trade/balance/c5700.html
2013 : U.S. trade in goods with China
NOTE: All figures are in millions of U.S. dollars on a nominal basis, not
seasonally adjusted unless otherwise specified. Details may not equal totals due to rounding.

Month Exports Imports Balance
January 2013 9,384.6 37,172.0 -27,787.4
February 2013 9,302.6 32,715.0 -23,412.5
March 2013 9,435.4 27,321.7 -17,886.3
April 2013 8,991.9 33,101.8 -24,109.9
May 2013 8,786.5 36,646.2 -27,859.7
June 2013 9,181.5 35,831.3 -26,649.8
July 2013 8,735.2 38,818.4 -30,083.2
August 2013 9,280.9 39,171.7 -29,890.8
TOTAL 2013 73,098.6 280,778.0 -207,679.4
---

His claim was about his state, not the country.
Do you have a state by state breakdown of that?
[...]

What state is that smart?
 
On Thu, 31 Oct 2013 22:27:05 -0700 (PDT), Greegor
<greegor47@gmail.com> wrote:

PaxPerPoten wrote:
PpP > Information for Ignorant assholes
PpP > like you... My state has a balanced
PpP > budget and has no debt!! We buy
PpP > only what we can afford. You sure
PpP > as Hell cannot say that for the
PpP > lame asshole in DC.

Bob F wrote:
BF > I bet your state is one of the Repub
BF > leach states that gets more money
BF > from the feds than they pay
BF > in federal taxes too.

Please LIST those states so they
can get the credit!

If there is a state smart enough
to pull off what you claim, shouldn't
you tell everybody how smart they are?

PpP > by the way ..we also sell more
PpP > product to China then we buy from them.

Really! You are funny!
http://www.census.gov/foreign-trade/balance/c5700.html
2013 : U.S. trade in goods with China
NOTE: All figures are in millions of U.S. dollars on a nominal basis, not
seasonally adjusted unless otherwise specified. Details may not equal totals due to rounding.

Month Exports Imports Balance
January 2013 9,384.6 37,172.0 -27,787.4
February 2013 9,302.6 32,715.0 -23,412.5
March 2013 9,435.4 27,321.7 -17,886.3
April 2013 8,991.9 33,101.8 -24,109.9
May 2013 8,786.5 36,646.2 -27,859.7
June 2013 9,181.5 35,831.3 -26,649.8
July 2013 8,735.2 38,818.4 -30,083.2
August 2013 9,280.9 39,171.7 -29,890.8
TOTAL 2013 73,098.6 280,778.0 -207,679.4
---

His claim was about his state, not the country.
Do you have a state by state breakdown of that?
[...]

What state is that smart?

Texas, IIRC.
 
All of this because somebody wants to
undo the printer maker supply scam, right?
 
On Mon, 11 Nov 2013 15:13:36 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon@on-my-web-site.com> wrote:

> http://tinyurl.com/lwywqf5

and from another posting

> http://tinyurl.com/p5x5cd8

for those of us [mainly ME!] who seems to be taunted by tinyurl could you
include the exact URL?

by posting a very long URL enclosed in <> it seems to get less 'wrap'
damage.
 
On Tue, 12 Nov 2013 08:01:23 -0700, RobertMacy
<robert.a.macy@gmail.com> wrote:

On Mon, 11 Nov 2013 15:13:36 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@on-my-web-site.com> wrote:

http://tinyurl.com/lwywqf5

<http://hotair.com/archives/2013/11/08/espn-panelist-why-are-we-playing-a-war-anthem-like-the-star-spangled-banner-before-sporting-events/>

and from another posting

http://tinyurl.com/p5x5cd8

<http://hotair.com/archives/2013/11/11/australian-ministers-weve-had-just-about-enough-of-this-socialism-masquerading-as-environmentalism/>

for those of us [mainly ME!] who seems to be taunted by tinyurl could you
include the exact URL?

by posting a very long URL enclosed in <> it seems to get less 'wrap'
damage.

I've been pushing the <...> approach for some time, but some morons
lurking here insist that it doesn't matter >:-}

What sort of problem is tinyurl causing you?

...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 | |
| Voice:(480)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.
 
On Tue, 12 Nov 2013 08:18:15 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon@on-my-web-site.com> wrote:

...snip....

I've been pushing the <...> approach for some time, but some morons
lurking here insist that it doesn't matter >:-}

What sort of problem is tinyurl causing you?

...Jim Thompson

Thanks for posting. Do the <> help you?

the <> cause my reader to show the URL as a single line, highlighted in
blue. If too long, wraps the line WITHOUT inserting cr,lf

I can easily ctrl-c it, or go to it directly. Some people post both the
tinyurl and the exact url.

Also, examine looking for .pdf file, in which case it is best to 'save
from link' to a folder; else wait an indeterminant amount of time, during
which link could break and I have to start over, worse, at the end of the
time, my outdated Adobe may not read it anyway, so I have to go to cache4
to rename it .pdff for the Foxit Reader; or run it through online service,
<http://freemypdf.com/> to make it compatible with my outdated Adobe
Reader. No offense meant, but I can see if the source is a 'looney'
website which will inundate me with cookies, add me to a spam list, or
generally screw me up with thousands of unrelated side images. Or,
sometimes, and this is the most rewarding of all, find a new reliable
source of information, which I wish to bookmark for future.

tinyurl sometimes, not all the time, but often enough to cause me to avoid
it, does NOTHING when I go there, just sits showing their logo, etc
without any indication of anything going on. page says DONE and no
transferring bits. can sit for hours like that, NEVER going to the step of
showing me the appropriate link.
 
On Tue, 12 Nov 2013 09:16:14 -0700, RobertMacy
<robert.a.macy@gmail.com> wrote:

On Tue, 12 Nov 2013 08:18:15 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@on-my-web-site.com> wrote:

...snip....

I've been pushing the <...> approach for some time, but some morons
lurking here insist that it doesn't matter >:-}

What sort of problem is tinyurl causing you?

...Jim Thompson

Thanks for posting. Do the <> help you?

the <> cause my reader to show the URL as a single line, highlighted in
blue. If too long, wraps the line WITHOUT inserting cr,lf

I can easily ctrl-c it, or go to it directly. Some people post both the
tinyurl and the exact url.

Also, examine looking for .pdf file, in which case it is best to 'save
from link' to a folder; else wait an indeterminant amount of time, during
which link could break and I have to start over, worse, at the end of the
time, my outdated Adobe may not read it anyway, so I have to go to cache4
to rename it .pdff for the Foxit Reader; or run it through online service,
http://freemypdf.com/> to make it compatible with my outdated Adobe
Reader. No offense meant, but I can see if the source is a 'looney'
website which will inundate me with cookies, add me to a spam list, or
generally screw me up with thousands of unrelated side images. Or,
sometimes, and this is the most rewarding of all, find a new reliable
source of information, which I wish to bookmark for future.

tinyurl sometimes, not all the time, but often enough to cause me to avoid
it, does NOTHING when I go there, just sits showing their logo, etc
without any indication of anything going on. page says DONE and no
transferring bits. can sit for hours like that, NEVER going to the step of
showing me the appropriate link.

Are you hung up in some kind of Joergasm ?:-}

...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 | |
| Voice:(480)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.
 
On Tue, 12 Nov 2013 09:32:47 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon@on-my-web-site.com> wrote:

...snip...

Are you hung up in some kind of Joergasm ?:-}

...Jim Thompson

FINALLY got to use that pun you wrote years ago?!
 
On Tue, 12 Nov 2013 09:36:54 -0700, RobertMacy
<robert.a.macy@gmail.com> wrote:

On Tue, 12 Nov 2013 09:32:47 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@on-my-web-site.com> wrote:

...snip...

Are you hung up in some kind of Joergasm ?:-}

...Jim Thompson

FINALLY got to use that pun you wrote years ago?!

Yep ;-)

...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 | |
| Voice:(480)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.
 
On Tuesday, November 19, 2013 3:00:57 AM UTC+2, Tim Williams wrote:
"amdx" <nojunk@knology.net> wrote in message
news:l6e8u7$6g2$1@dont-email.me...
Boys, I don't mind a little disagreement, but Jim!
Putting anyone in the same category as Phil Allison,
shame, shame on you, that's a low blow.

Actually, when I read the first post of this latest series, I could've
sworn I was reading one of them. That distinct combination of arrogance
and ignorance.

Both John and Jim are equally childish as Phil.

Tim

ROFL, had not been here for a while, nice to see some things
do not change/get exhausted :).

I think technically Jim has a point, a trace does have an inductance
whether you choose to view it as a transmission line (e.g. referenced
to a plane) or not. Whether this inductance is to blame in this
particular case is a matter of quantity, perhaps not so easy
to guess/simulate.
Then traces also have active resistance, you know :D .

Dimiter

------------------------------------------------------
Dimiter Popoff, TGI http://www.tgi-sci.com
------------------------------------------------------
http://www.flickr.com/photos/didi_tgi/sets/72157600228621276/
 
On Mon, 18 Nov 2013 12:25:28 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

On Mon, 18 Nov 2013 10:30:05 -0800, John Larkin
jlarkin@highlandtechnology.com> wrote:

On Mon, 18 Nov 2013 11:14:39 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

On Mon, 18 Nov 2013 09:34:16 -0800, John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

On Mon, 18 Nov 2013 09:05:54 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

On Mon, 18 Nov 2013 06:59:03 -0800, John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

On Thu, 14 Nov 2013 08:13:54 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

On Wed, 13 Nov 2013 19:30:07 -0800, John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

On Mon, 11 Nov 2013 10:49:05 -0600, "Tim Williams" <tmoranwms@charter.net
wrote:

Is J2 the socket for the PIC, or is it going through cables to the PIC
somewhere else?

What are the trace lengths on the loop from Q1 source (ground), to the
nearest bypass capacitor on +12VR, through D5, back to Q1? (Hint: D5 must
be placed at Q1, not at the coil.)

Why? It will clamp a flyback overshoot wherever it is in the circuit.

If the wiring from FET to coil is significantly inductive, then what?

...Jim Thompson


Since you can't think this through, you'll have to Spice it.

No. It's _you_ who'll have to LTspice it... and you'll get it wrong
:-}

...Jim Thompson


Whenever "Thompson" and "inductance" show up in the same post, amusement is sure
to follow.

Wiring inductance _between_device_and_catch_diode_ can cause voltage
spikes, depending on device turn-off speed... irrespective of what
smug-ass comments Larkin may churn up.

...Jim Thompson

Show us.

See attachment. Sorry that Larkin is incapable of understanding the
basic behavior of _any_ inductance.

...Jim Thompson

Moron. A PCB trace, or a wire, isn't an inductor, it's a transmission
line. And a mosfet isn't an ideal switch.

According to your model, every mosfet always blows up from its own
wirebond inductance! Or from any drain trace, even if the load is
resistive!

(Thompson + inductors) dependably = (stupidity)




--

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 Mon, 18 Nov 2013 13:20:14 -0800, John Larkin
<jlarkin@highlandtechnology.com> wrote:

On Mon, 18 Nov 2013 12:25:28 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

On Mon, 18 Nov 2013 10:30:05 -0800, John Larkin
jlarkin@highlandtechnology.com> wrote:

On Mon, 18 Nov 2013 11:14:39 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

On Mon, 18 Nov 2013 09:34:16 -0800, John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

On Mon, 18 Nov 2013 09:05:54 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

On Mon, 18 Nov 2013 06:59:03 -0800, John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

On Thu, 14 Nov 2013 08:13:54 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

On Wed, 13 Nov 2013 19:30:07 -0800, John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

On Mon, 11 Nov 2013 10:49:05 -0600, "Tim Williams" <tmoranwms@charter.net
wrote:

Is J2 the socket for the PIC, or is it going through cables to the PIC
somewhere else?

What are the trace lengths on the loop from Q1 source (ground), to the
nearest bypass capacitor on +12VR, through D5, back to Q1? (Hint: D5 must
be placed at Q1, not at the coil.)

Why? It will clamp a flyback overshoot wherever it is in the circuit.

If the wiring from FET to coil is significantly inductive, then what?

...Jim Thompson


Since you can't think this through, you'll have to Spice it.

No. It's _you_ who'll have to LTspice it... and you'll get it wrong
:-}

...Jim Thompson


Whenever "Thompson" and "inductance" show up in the same post, amusement is sure
to follow.

Wiring inductance _between_device_and_catch_diode_ can cause voltage
spikes, depending on device turn-off speed... irrespective of what
smug-ass comments Larkin may churn up.

...Jim Thompson

Show us.

See attachment. Sorry that Larkin is incapable of understanding the
basic behavior of _any_ inductance.

...Jim Thompson

Moron. A PCB trace, or a wire, isn't an inductor, it's a transmission
line. And a mosfet isn't an ideal switch.

According to your model, every mosfet always blows up from its own
wirebond inductance! Or from any drain trace, even if the load is
resistive!

(Thompson + inductors) dependably = (stupidity)

No amount of bloviation will cover your ignorance... wiring out to a
solenoid or relay before the catch diode will give you grief.

No matter how many times you bloviate.

...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 | |
| Voice:(480)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.
 
On Mon, 18 Nov 2013 14:25:27 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

On Mon, 18 Nov 2013 13:20:14 -0800, John Larkin
jlarkin@highlandtechnology.com> wrote:

On Mon, 18 Nov 2013 12:25:28 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

On Mon, 18 Nov 2013 10:30:05 -0800, John Larkin
jlarkin@highlandtechnology.com> wrote:

On Mon, 18 Nov 2013 11:14:39 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

On Mon, 18 Nov 2013 09:34:16 -0800, John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

On Mon, 18 Nov 2013 09:05:54 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

On Mon, 18 Nov 2013 06:59:03 -0800, John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

On Thu, 14 Nov 2013 08:13:54 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

On Wed, 13 Nov 2013 19:30:07 -0800, John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

On Mon, 11 Nov 2013 10:49:05 -0600, "Tim Williams" <tmoranwms@charter.net
wrote:

Is J2 the socket for the PIC, or is it going through cables to the PIC
somewhere else?

What are the trace lengths on the loop from Q1 source (ground), to the
nearest bypass capacitor on +12VR, through D5, back to Q1? (Hint: D5 must
be placed at Q1, not at the coil.)

Why? It will clamp a flyback overshoot wherever it is in the circuit.

If the wiring from FET to coil is significantly inductive, then what?

...Jim Thompson


Since you can't think this through, you'll have to Spice it.

No. It's _you_ who'll have to LTspice it... and you'll get it wrong
:-}

...Jim Thompson


Whenever "Thompson" and "inductance" show up in the same post, amusement is sure
to follow.

Wiring inductance _between_device_and_catch_diode_ can cause voltage
spikes, depending on device turn-off speed... irrespective of what
smug-ass comments Larkin may churn up.

...Jim Thompson

Show us.

See attachment. Sorry that Larkin is incapable of understanding the
basic behavior of _any_ inductance.

...Jim Thompson

Moron. A PCB trace, or a wire, isn't an inductor, it's a transmission
line. And a mosfet isn't an ideal switch.

According to your model, every mosfet always blows up from its own
wirebond inductance! Or from any drain trace, even if the load is
resistive!

(Thompson + inductors) dependably = (stupidity)

No amount of bloviation will cover your ignorance... wiring out to a
solenoid or relay before the catch diode will give you grief.

No matter how many times you bloviate.

...Jim Thompson

Using your idiotic simulation, I suppose so. Good thing I don't use
your idiotic simulations.

25 kilovolts! Hilarious! I wish I could make a 25 kilovolt boost
conveter from a 2N7000!



--

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 Tuesday, November 19, 2013 4:38:45 AM UTC+2, John Larkin wrote:
...
I think technically Jim has a point, a trace does have an inductance
whether you choose to view it as a transmission line (e.g. referenced
to a plane) or not.

An inductor and a transmission line will behave differently here. The
inductor can, at least in a goofy simulation, make an unlimited
flyback spike; the transmission line flyback voltage is limited to
Zo*Id and usually a lot lower.

Indeed, as I said it is a matter of quantity.
I can certainly imagine a long enough unterminated trace produce
a spike which over time might kill something - though a 2N7000 seems
an unlikely candidate, it must be said.
But then they may have improved processes, switching times, got them
on smaller dies (if doable) ... who knows.

------------------------------------------------------
Dimiter Popoff, TGI http://www.tgi-sci.com
------------------------------------------------------
http://www.flickr.com/photos/didi_tgi/sets/72157600228621276/
 

Welcome to EDABoard.com

Sponsor

Back
Top