Driver to drive?

[David L. Jones]

Bobby Joe wrote:

Anyone used these guys sucessfully? I'm a bit worried about chinese
methodology since we have all experienced low quality chinese
manufacturing techniques.

No problems at all with all sorts of boards.
Biggest problem I've heard of were they sent the wrong colour board, but
fixed within two days for free.
Service is excellent, always on time, and quality is excellent for the
price.
They did the board and front panel for my uWatch and uCurrent projects for
example:
http://www.calcwatch.com/
http://www.alternatezone.com/electronics/ucurrent/

Dave.
--
---------------------------------------------
Check out my Electronics Engineering Video Blog & Podcast:
http://www.alternatezone.com/eevblog/

 

[daestrom]

Don T wrote:

"Richardson" <member@newsguy.com> wrote in message
news:JYWdncZmtr_K2uPXnZ2dnUVZ_tOdnZ2d@posted.toastnet...

Again power is not measured in AMP, but in WATT you stupid jerks, Give
it up now suckers.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


If you know it all answer me this. Why are tools like electric drills
and even shop vacuums listed as having 6.0 AMP etc. motors?

http://www.blackanddecker.com/ProductGuide/CategoryOverview.aspx?cPath=1496.2050

Because it makes better advertising copy than 0.48 horsepower??

daestrom

 

[David L. Jones]

Bobby Joe wrote:

Whats the E-Test for? They test the board for proper electrical
connections?

Correct, and for shorts too.

If so what do they do when there is a bad board?

They usually toss them out, but you can specifically ask them to send the
bad boards, useful for manual samples etc.

Do they replace the board?

Depends, some do, some don't. Usually they manufacture more boards than you
order, just in case a few fail for this or other reasons (silk screen,
soldermask etc)

I'm curious because the cost is 200$ for an E-test
on a relatively simple board run and I don't think it is needed.

It's free (or built into the price) with www.pcbcart.com

Dave.

--
---------------------------------------------
Check out my Electronics Engineering Video Blog & Podcast:
http://www.alternatezone.com/eevblog/

 

[David L. Jones]

Bobby Joe wrote:

On Aug 10, 3:43 am, "Polyp" <po...@everywhere.com> wrote:
"Bobby Joe" <bobbyjoe23...@gmail.com> wrote in message

news:c81b510b-921e-4de0-93cb-a6ecf2db1879@e18g2000vbe.googlegroups.com...

Whats the E-Test for? They test the board for proper electrical
connections? If so what do they do when there is a bad board? Do
they replace the board? I'm curious because the cost is 200$ for an
E-test on a relatively simple board run and I don't think it is
needed.

As I understand it, it's a point to point flying probe check. I've
not had it done on simple boards when only having a low number made.

When a faulty board is found my vendor simply marks it as being
faulty.

For my case the only issues I can see are at the high pin count SMT's
with a pitch of about 8 mils. Other than that I have made sure
everything on the board has a clearance of at least 10 mils. 90% of
the board is just running traces from led's to the IC's. Since I will
be hand assembling the first few boards I imagine I will be able to
see any of the main issues and I will have to do checks anyways to
makes sure my soldering was good. So I can't justify an extra 20-30%
increase in cost just for the E-test if that is the only reason. The
boards are only 2-layer so I don't have to worry about inner traces
that I can't get at.

In that case I wouldn't bother either.

Dave.
--
---------------------------------------------
Check out my Electronics Engineering Video Blog & Podcast:
http://www.alternatezone.com/eevblog/

 

[Rich Grise]

On Mon, 10 Aug 2009 22:36:21 +0100, News wrote:

I believe GM may make the engine variable speed, and lower efficiency, as
the customers may be disconcerted at experiencing a constant speed revving
engine. Sounds garbage to me. Who cares about the speed of the engine?

The driver. It could be disconcerting, especially to Aunt Tillie, when
the sound of the motor doesn't change through acceleration, braking, etc.

Cheers!
Rich

 

[Rich Grise]

On Mon, 10 Aug 2009 18:19:42 -0400, daestrom wrote:

Archimedes' Lever wrote:

If all you are going to do is make shit up, you should stay out of a
discussion where you tout yourself as knowing about it.

Back at ya. Go look at the pulley ratio on an old engine (say '40s or
'50s) with a DC generator, then go look at a modern auto. Until you've
done that, just shut up and blow away...

The only way to get rid of trolls like that is to filter them.

Hope This Helps!
Rich

 

[Richard the Dreaded Liber]

On Sun, 09 Aug 2009 16:57:04 -0400, Jamie wrote:

John Fields wrote:
On Sat, 8 Aug 2009 06:38:33 -0700 (PDT), Bill Sloman
On Aug 8, 3:23 am, Richard the Dreaded Libertarian
On Fri, 07 Aug 2009 11:47:22 -0400, wrote:
On Wed, 05 Aug 2009 11:46:28 -0700, Jim Thompson

Written by a doctor (orthopedic surgeon) acquaintance of ours...

Is Canada's health care system perfect? No. That being said, compared
to the US the data indicate that Canada gets slightly better results.

A couple of indicators:

https://www.cia.gov/library/publications/the-world-factbook/rankorder...
https://www.cia.gov/library/publications/the-world-factbook/rankorder...

And just how long is the waiting list for, say, and MRI or CAT scan?
How long is the waiting list for a transplant? How long is the waiting
list for a coronary bypass?

Oh, that's right - they get around the rationing by coming to the US to
get treatment.

Well, you can kiss that safety valve goodbye if Obama's socialized
medicine gets passed.

Right. They'd have to go to England and "go private" there. The U.K.
National Health system provides perfectly adequate health care for
everybody, but there's enough spare capacity to service people who
want to buy faster service - when my ruptured intervertebral had taken
a long time to recover I spent a couple of hundred pouds on a private
magnetic resonance scan; and X-ray scan would have been half the
price, but I didn't fancy absorbing 4% of the lethal radiation dose.
Pity...


Be nice

And still no answer to my "how long is the watiting list" question.

Wonder why that could be?
</sarcasm>

Cheers!
Rich

 

[Don T]

"daestrom" <daestrom@twcny.rr.com> wrote in message
news:h5q7en12lar@news2.newsguy.com...

Don T wrote:
"Richardson" <member@newsguy.com> wrote in message
news:JYWdncZmtr_K2uPXnZ2dnUVZ_tOdnZ2d@posted.toastnet...

Again power is not measured in AMP, but in WATT you stupid jerks, Give it
up now suckers.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


If you know it all answer me this. Why are tools like electric drills and
even shop vacuums listed as having 6.0 AMP etc. motors?

http://www.blackanddecker.com/ProductGuide/CategoryOverview.aspx?cPath=1496.2050


Because it makes better advertising copy than 0.48 horsepower??

daestrom

=> snicker <=

Probable, but it makes the statement that "power is never measured in
ampere units" quite wrong.

--


Don Thompson

Stolen from Dan: "Just thinking, besides, I watched 2 dogs mating once,
and that makes me an expert. "

There is nothing more frightening than active ignorance.
~Goethe

It is a worthy thing to fight for one's freedom;
it is another sight finer to fight for another man's.
~Mark Twain

 

[Rich Grise]

On Sat, 08 Aug 2009 15:29:40 -0400, legg wrote:

On Sat, 8 Aug 2009 03:27:10 -0700 (PDT), Bobby Joe
bobbyjoe23928@gmail.com> wrote:

http://en.wikipedia.org/wiki/Surface-mount_technology

I'm trying to purchase some caps and resistors for line termination
and bypass. I don't know if it's me or what but it seems like package
names are mixed with the actual. That is, imperial and metric are both
used. Worse is that most exist in both as the same name.

0402? Is that metric or imperial?

0402 (1005 metric) : 0.04" × 0.02" (1.0 mm × 0.5 mm) Typical power
rating for resistors 1/16 Watt
01005 (0402 metric) : 0.016" × 0.008" (0.4 mm × 0.2 mm) Typical power
rating for resistors 1/32 Watt

It's even worse that they are "inverted". Not sure how they get 01005
out of .015 and .008...
METRIC IMPERIAL

0603 (0.6x0.3mm) 0201 (.02x.01inch)
1005 (1.0x0.5) 0402 (.04x.02)
1608 (1.6x0.8) 0603 (.06x.03)
2012 (2.0x1.2) 0805 (.08x.05)
3216 (3.2x1.6) 1206 (.10x.06)
3225 (3.2x2.5) 1210 (.12x.10)
3720 (3.7x2.0) 1408 (.14x.08)
5025 (5.0x2.5) 2010 (.20x.10)

How do these relate to package designations? I see SOD-23, SOT-123,

and all kinds of other packages called out on, say, Digi-Key and stuff.

Oh, never mind. RTFDS. ;-) (makes it kinda tedious to spec a part for
a certain size.)

Thanks,
Rich

 

[Richard the Dreaded Liber]

On Sun, 09 Aug 2009 21:59:54 +0000, Jim Yanik wrote:

PeterD <peter2@hipson.net> wrote in

In Obama's world, free speach is tresspassing against him and his
thugs.

Just wait until he gets his Internal Civilian Security Force,that he wants
"as well armed as the military".

Doesn't he already have Homeland Security, courtesy Cheney/Bush?

Thanks,
Rich

 

[UltimatePatriot]

On Mon, 10 Aug 2009 09:34:33 -0500, "Ouroboros Rex" <its@casual.com>
wrote:

UltimatePatriot wrote:
On Sun, 9 Aug 2009 14:31:19 -0500, "Ouroboros Rex" <its@casual.com
wrote:

What you mean is, you can't find any examples of the left using the
exact same tacits in a town hall meeting.

Your tacits are utter drool.

Yep.

You should drown in your tacits.

Tommyboy posted a ridiculous right wing heath care bill hoax. I killed it
with facts.

What you posted were not facts, nor did they refute what he posted.

Floppy tried to redefine the debate above by lying about what was said. I
fixed it with facts.

You fixed nothing. You hard wired yourself in stupid mode. You didn't
need to though, since you were already doing such a good job at it.

Tommyboy tried to make the non-bailout of CIT all about dems hating small
business. I fixed it with facts.

Look, you stupid fuck... You have NEVER "fixed" anything in your
entire, pathetic life, boy.

Tommyboy tried to pretend the health care bill would leave the elderly
without care. I fixed it with facts.

The fucked up health care bill that is NOT going to get passed, did
have drawbacks in it for the elderly. You posted ZERO facts.

Tommy boy tried to pretend Obama's administrationis looking for people
that disagree with it. I fixed it with facts.

You fixed nothing. Obama, and his retard crew ARE looking for a way
out of the shit filled cess pool they have gotten themselves into.

Tommyboy tried to pretend Obama had called out the unions to town hall
meetings. I fixed it with facts.

Perhaps not he by direct explicit order, but he certainly did by OKing
the suggestions made by his retarded underling advisors.

Meanwhile, you have drooled baseless insults.

You're an utter idiot. It is not baseless, nor is it an insult. It is
an iteration of fact.

Yeah, clearly I am the problem here. lol

Your bent brain is the problem. You are just so goddamned hard wired
retarded that you'll never see reality without it being colored by your
stupidity.

 

[UltimatePatriot]

On Mon, 10 Aug 2009 09:38:37 -0500, "Ouroboros Rex" <its@casual.com>
wrote:

UltimatePatriot wrote:
On Sun, 9 Aug 2009 14:32:31 -0500, "Ouroboros Rex" <its@casual.com
wrote:

You mean trespassing.

How does showing up at a public forum equate to trespassing, you
retarded little unamerican piece of shit?

They just showed up and waited to get in, did they? Cite please.

Where did you see it written that that was the procedure?

You really are one retarded motherfucker, pussy boy.


Public lot. Public building. Public forum. Public meeting.

Where is the trespassing at you retarded, pussified lying piece of
shit?

 

[UltimatePatriot]

On Mon, 10 Aug 2009 09:39:01 -0500, "Ouroboros Rex" <its@casual.com>
wrote:

UltimatePatriot wrote:
On Sun, 9 Aug 2009 14:32:21 -0500, "Ouroboros Rex" <its@casual.com
wrote:

UltimatePatriot wrote:
On Fri, 7 Aug 2009 14:17:24 -0500, "Ouroboros Rex" <its@casual.com
wrote:

There were at least two scuffles between protesters trying to enter
and organizers manning the doors.


"organizers" of the scuffle.

translation: droool

Nice sig. Fits you to a T.

More nothing from the nothing.

Is this what you call "fixing with facts"?

Got any more nothing for us, nothing boy?

 

[UltimatePatriot]

On Mon, 10 Aug 2009 09:56:50 -0500, "amdx" <amdx@knology.net> wrote:

and the food was so bad I lost 10 pounds in
three days ;-)

Proof that it was all water and lard, and very likely has all returned

or will very soon.

 

[rebel]

On Tue, 11 Aug 2009 08:32:24 +1000, "David L. Jones" <altzone@gmail.com> wrote:

Frank Buss wrote:
Mikko Syrjälahti wrote:

I've ordered 2 and 4 layer boards with 0.15/0.15 track/spacing from
them. Quality and communications has been ok.

Any examples of prices and shipping costs? I'm interested especially
in prototype quantities. Other websites publishes some prices on the
front page, but seems like you have to register for pcbcart first to
see some numbers.

Yes, they have recently changed this, you have to sign up to use the Qutoe
function, but it's well worth it. I've never been spammed by them once.
The online quote system is excellent, you even get a qty price breakdown so
you can see whether it's cheaper to order 10 or 20 etc.
Huge range of options (colour, thickness, gold etc)

But if you want some basic prices, around $40 tooling for a small DS board,
around $90 for a more complex 4 layer board.
Boards themslves are as little as a few dollars to say $10 each in small qty
(<10), size and other factors dependent.

Further to David's comments, note that tooling is a once-off charge (i.e.
further runs don't pay it - they keep the separations - unless you change the
design of course). Some shops charge their setup cost on repeats.

Also they deliver on-time, repeatedly. Like a Swiss railway. And when they
quote 8/12/15 day turnaround, that is to_your_door.

I've used them for about a dozen jobs now. Quality good, price is better than
competitive, and they ask questions if they see something amiss. I've only had
one cock-up from them, where a large number of small boards were shipped in a
big V-grooved panel where I had specified fully separated.

One down-side. Your "profile" in their database specifies the shipping address.
If you want to ship direct to a client/fab/whatever, you have to first go in and
edit your profile - you can't just provide destination details in an email or
text-file. And that means a risk of confusion or worse if you have concurrent
jobs in their system.

 

[Bart!]

Fuck off, retarded troll.

 

[BillyPilgrim]

On 10 Aug 2009 12:40:40 GMT, Jim Yanik <jyanik@abuse.gov> wrote:

flipper <flipper@fish.net> wrote in
news:gnqu75hlq57irkrs6gl597p7komrd860fc@4ax.com:

On Sun, 9 Aug 2009 14:32:31 -0500, "Ouroboros Rex" <its@casual.com
wrote:

UltimatePatriot wrote:
On Fri, 7 Aug 2009 14:17:24 -0500, "Ouroboros Rex" <its@casual.com
wrote:

There were at least two scuffles between protesters trying to enter
and organizers manning the doors.


Looks more to me like the retards at the door provoked the response
by way of their illicit act of attempting to stop citizens from
entering a public forum.

You mean trespassing.


Spoken like a good loyal fascist: "No dissent allowed."


also Orwellian Newspeak;
dissent becomes "thuggery" or "misinformation".

It is gonna be a wild ride, and we never actually thought it could get
this convoluted!

 

[RichD]

On Aug 7, thaif <m.th...@gmail.com> wrote:

although i'm a grad student in electronics engg, still see the world
moves ahead with the change of positioning of particles in the
universe initiated by its previous states and These changes observed
can be told as measured or observed w r  t time parameter.
      i see the time as a frames of a video with video being more than
2D.

     please help me understand better by giving a independent
definition of time or any resource for that.thanks in advance.

Time is Allah's way of guaranteeing that
everything doesn't happen all at once.

--
Rich

 

[Archimedes' Lever]

On Mon, 10 Aug 2009 14:46:43 -0500, "bw" <bwegher@hotmail.com> wrote:

"Archimedes' Lever" <OneBigLever@InfiniteSeries.Org> wrote in message
news:050085hkluifp8sp0c3moqfrkofbb43au2@4ax.com...
On Sun, 09 Aug 2009 22:56:56 -0400, clare@snyder.on.ca wrote:

And many engines back in the generator years redlined at about 3600.

You're an idiot. The engines of the 50s and 60s redlined above 5000
rpm.

3600 rpm was the model T years, you ditz.

Wrong.
Model T was 1800 max.
http://www.barefootsworld.net/ford-t-specs.html

In the USA "high speed" engines of the pre-WW2 era were 3600 RPM
http://en.wikipedia.org/wiki/Straight-eight_engine
The flathead ford v8 was the exception at 3200 RPM

After WW2 most engines stayed at 3600 rating, but the "redline" went to 4000
RPM

RPM and compression generally increased in the 20th century as balance and
metal technology advanced.
Europe generally pushed the RPM higher before the USA

WWII was a long way back from the 50s and 60s, which were the decades I
mentioned, and in THOSE decades, the redline was higher, as was the
"normal" operating window. Far higher than the 3600 that some retarded
dope stated.

 

[Archimedes' Lever]

On Mon, 10 Aug 2009 18:19:42 -0400, daestrom <daestrom@twcny.rr.com>
wrote:

No, it is not. Generators were specifically less efficient at lower
engine speeds, and it had NOTHING to do with pulley ratios, you fucking
dipshit. The pulley ratio was only slightly lower, and that was due to
the larger mass that the rotor of the typical generator of the time had.

Guess you've never seen a DC generator that was oversped then.

What part of "larger mass" do you not understand, idiot?