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James Newtons Massmind | 1 Dec 02:06

RE: [OT] Wanna job at Samsung? Just counterfeit thier products!

> http://newpaper.asia1.com.sg/news/story/0,4136,118196,00.html
> 
> Main article focus is apparantly counterfeit electronics are 
> reaching market before the originals - and consumers are 
> mistaking the originals as the knockoffs. 
> 
> -Denny

Didn't I hear a story about Sony getting busted for buying knock off PS3's
and selling them as real Sony to make up their own production shortfalls?
Don't let that start a rumor, I may be dis-remembering it or combining
different stories in my mind, but I seem to remember something about that.

---
James.

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Brent Brown | 1 Dec 02:37
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Re: [EE] 115V 50Hz and hot transformer

I've been in contact with the transformer manufacturer and so far they sound very 
helpful.

They say I'm using it correctly, ie. it's appropriate to wire the two primaries in 
parallel. They discussed core losses and copper losses, and did a quick calculation 
on temperature rise that agrees with the temperatures I am observing. They point 
out that this temperature is well within the specifications (insulation rating of 155 
deg C) BUT they say they would like to see it lower than this (so would I !!!). Further 
to this they will take a transformer from their warehouse and do some testing at 
50Hz to confirm, and look at what changes if any can be made to improve 
performance under these conditions.

Thanks for all the responses, I'll report back when I know some more!

-- 
Brent Brown, Electronic Design Solutions
16 English Street, St Andrews,
Hamilton 3200, New Zealand
Ph: +64 7 849 0069
Fax: +64 7 849 0071
Cell: 027 433 4069
eMail:  brent.brown <at> clear.net.nz

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Jinx | 1 Dec 02:45
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Re: [EE]Magnets different in France?

> Can anybody authoritatively confirm or deny this supposed difference 
> regarding magnetic pole definitions?

Someone else thinks so

http://edhiker.home.comcast.net/North_Pole_Positive_or_Negative.html

Could just be a repeated typo though

Two other little-known facts - in France, maglev trains are stuck
firmly to the rails, and Pere Noel comes from the South Pole on
a sled pulled by Rudolph The Red-Nosed Penguin

How strange. Like the Green For Stop thing

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Victor Fraenckel | 1 Dec 02:47

Re: [EE]Magnets different in France?

It is in keeping with the French contrary nature. ;>{ )

Vic

*____________________________________________________________________________________________*

*Victor Fraenckel
KC2GUI
victorf ATSIGN windreader DOT com**
*

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Justin Richards | 1 Dec 02:51
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Re: [EE] LCD power supply

Hi Zik,

Roman Black (is he still here) has a low current 5v to 13.5v converter  here

http://www.romanblack.com/smps/conv.htm

It may be what you are after.

Justin

On 12/1/06, Zik Saleeba <zik <at> zikzak.net> wrote:
> Thanks everyone - sounds like a switcher is the way to go.
>
> Cheers,
> Zik
>
> On 12/1/06, Kenneth Lumia <klumia <at> adelphia.net> wrote:
> > Zik,
> >
> > Depending on the current requirements, you may want to
> > look at a boost switcher such as the LM2733Y.  It uses very
> > few external parts and is small (SOT-23-5).  I used it in a
> > 5v to 15V boost application and it works well.  You may
> > want to carefully look at the curves and equations before
> > using at 3.3v, especially concerning max load and efficiency.
> >
> > A voltage multiplier would probably have too many parts.
> >
> > If supply sequencing is not an issue and regulation is not critical,
> > you could also PWM a PIC output pin to provide the voltage.
(Continue reading)

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Zik Saleeba | 1 Dec 03:04
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Re: [EE] LCD power supply

Nice one - thanks.

On 12/1/06, Justin Richards <justin.richards <at> gmail.com> wrote:
> Hi Zik,
>
> Roman Black (is he still here) has a low current 5v to 13.5v converter  here
>
> http://www.romanblack.com/smps/conv.htm
>
> It may be what you are after.
>
> Justin
>
> On 12/1/06, Zik Saleeba <zik <at> zikzak.net> wrote:
> > Thanks everyone - sounds like a switcher is the way to go.
> >
> > Cheers,
> > Zik
> >
> > On 12/1/06, Kenneth Lumia <klumia <at> adelphia.net> wrote:
> > > Zik,
> > >
> > > Depending on the current requirements, you may want to
> > > look at a boost switcher such as the LM2733Y.  It uses very
> > > few external parts and is small (SOT-23-5).  I used it in a
> > > 5v to 15V boost application and it works well.  You may
> > > want to carefully look at the curves and equations before
> > > using at 3.3v, especially concerning max load and efficiency.
> > >
> > > A voltage multiplier would probably have too many parts.
(Continue reading)

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James Newton, Host | 1 Dec 03:55

[OT] new features in the archive browser

I've been playing about with a new feature in the archive browser and I
think it might be ready to announce. I'm a little nervous about the load it
puts on the server, but hopefully it will stay alive.

If you go to piclist.com and click on "archive" then "today" (or any day)
then "Thread" to sort the posts people sent that day by thread, clicking on
the subject of a thread will show (on the left side by default) the entire
conversation included in that tread. 

Or if you like, just click on this for a demo:
http://www.piclist.com/techref/postbot.asp?by=time&id=piclist\2006\11\20&ord
er=thread then select a thread to view.

It tries to do a number of things that are darn hard.

- It tries to remove quoted text when it is extraneous, but NOT when it is
really being used. I'm sure it isn't really getting that right, and I would
love it if anyone could point out examples where it gets it wrong either by
not removing quoted text that should be remove or by removing quoted text
that should not be removed.

- It displays information about the poster (gleaned only from their email
address) on the right side of each post. If there is no picon for a domain,
some tricky JavaScript attempts to load a favicon from the domains web site,
but then falls back to just the text of the domain name if one is not found.
And it still wraps correctly in the columnar format for the little .com,
.net and .org's icons or into rows for country names and flags.

- It attempts to figure out what FAQ page applies to the subject at hand and
lists that at the top of the page. Minor A.I. application there. Real fun to
(Continue reading)

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Genome | 1 Dec 05:10
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Re: [OT]:: Reading a persons attitude from their eyes.. .

I got 22... Tell you the truth.. 80 or 90% of the time I did not have any 
idea on their emotions.... so maybe this where just more of luck maybe... I 
thought there was a research done on this that its not really facial 
expression we perceived that tells true human emotions but through some 
hormones released through the skin, that the other person detects.. I 
mean... You could look really angry or maybe act angry by changing your 
facial expression or movements.. but ofcourse you are not really angry.. 
maybe this is how deception is perceived... so I would not bet my life on 
the test..

"Herbert Graf" <mailinglist3 <at> farcite.net> wrote in message 
news:1164925914.3857.3.camel <at> PD804...
> On Thu, 2006-11-30 at 15:03 +1300, Russell McMahon wrote:
>> Test - introduced to me by my son who has a BSc in Psychology.
>> 36 pictures of eyes and a small part of a face.
>> Tests to see how well you can determine the persons attitude
>>
>>         http://www.i-am-bored.com/bored_link.cfm?link_id=20329
>>
>> I surprised myself with a score of 27/36 which they say is towards the
>> higher end of normal.
>> Multichoice with 4 options per photo.
>> Some photos are extremely poor ones.
>> No doubt people will doubt the usefulness and accuracy of such a test.
>> However, that anyone (let alone me) can score 75% on a 4 choice per
>> question test suggests that eyes are indeed an accurate indicator of
>> mood.
>
> Well, I have to say I was VERY surprised. I scored 28. What's so
> surprising is almost ALL of my answers were pure gut, I just went with
(Continue reading)

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Robert Ammerman | 1 Dec 05:12
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Re: [EE] 115V 50Hz and hot transformer

> I've tried a 230/115V transformer (measured 120V) but my PCB mount 
> transformer
> on my board gets too hot for my liking (85 deg C, or 185 deg F, no load). 
> FYI it is
> too hot to touch for more than a second or two!
>
> Trying to figure out a way of getting a 60Hz supply to test the 
> transformer before I
> complain to the transformer manufacturer. I thought about 12V or 24V to 
> mains
> inverters, but everything available here seems to be fixed 50Hz. Would 
> also need to
> be a sine wave for a proper test, and with 100VA or more I could test my 
> complete
> product.

Use signal generator to high power audio amp to old tube amplifier output 
transformer wired backwards = high volt, high power sine wave.

You can also probably find an appropriate "power supply" transformer that 
will work as well as the tube amp transformer.

I had to do this once to test a phase difference transducer used in power 
plants to determine when it is safe to close a breaker (ie: you better be in 
phase on both sides of the breaker). I built a little PIC app that generated 
a 60Hz sinewave output. The actual frequency was slightly adjustable so I 
could actually simulate a generator speeding up and slowing down in response 
to control pulses from the system attempting to get the gen in phase with 
the line before closing the breaker.
(Continue reading)

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Mark Rages | 1 Dec 05:46
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Re: [EE]Magnets different in France?

On 11/30/06, Victor Fraenckel <victorf <at> windreader.com> wrote:
> It is in keeping with the French contrary nature. ;>{ )
>
> Vic
>

"The French copy no-one.  And no-one copies the French." (said about
French cars.)

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Gmane