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peter green | 1 Aug 01:05

Re: [EE] Shutdown the planet for 5min.

Charles Craft wrote:
>> I forgot the "order of bringup time", but off hand I think hydro is
>> fastest, natural gas next, followed by coal, and ended with nuclear
>> which can take days to bring back up.
>>
>>     
>
> Does natural gas mean gas turbine or gas fired boilers?
> Which generates more efficiently?
>
>   
IIRC turbines are better than boilers but combining the two (using the 
waste heat from the turbines to run boilers) is better than either.

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Dr Skip | 1 Aug 04:42
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Re: [EE] Shutdown the planet for 5min.

Why would there not be a redirection of the steam at its nominal usage
rate, rather than a total blowoff, until someone determined why things
went away? You could vent and throttle down, but still keep the
'boilers' going until someone higher up determined this wasn't a 5
minute "lights out" prank or such. Seems much cheaper and reasonable
than blowing it all out as a first response...

-Skip

Mark Peterson wrote:
> Generating stations can handle an immediate loss of load without damage,
> and do so regularly.  Although they can handle it, such events are
> painstakingly avoided because they are very annoying and very costly.
> When such a loss happens, they immediately blow off their steam
> reservoir to prevent the generator rotor from over speeding.  I've been
> involved in several unplanned shutdowns of this type at a 600 MW coal
> fired power plant; two due to operator error, one to a nearby industrial
> explosions, and one as the result of a tornado.  The sudden release of
> steam generates a roar that will you cause you to shake and/or drop to
> the ground.
>  
> The operator error caused shutdowns were always a case for extreme
> chastisement of the offending employee because it would take nearly 8
> hours to bring the unit back on line with a total restart cost and
> loss-of-revenue cost of approximately $100,000.
>  
> M Peterson
>  
>
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John Chung | 1 Aug 04:56
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RE: [PIC] What to do with unused pins?

Where are you guys sourcing resistors*good quality*
from? I need them in small quantities.

Thanks,
John

--- wouter van ooijen <wouter <at> voti.nl> wrote:

> > In a similar vein, I spec 1% resistors even when I
> only need 
> > 20%, because they are the same price, and better 
> > availability. There's no downside.
> 
> Yes, but that breaks the analogy. You won't get more
> reliable failure
> rate figures even when you torture your sources. (In
> the analogy: sorry,
> 1% resistors are not avialable, or cost 10 times as
> much). 
> 
> Wouter van Ooijen
> 
> -- -------------------------------------------
> Van Ooijen Technische Informatica: www.voti.nl
> consultancy, development, PICmicro products
> docent Hogeschool van Utrecht: www.voti.nl/hvu
>  
>  
> 
> --
(Continue reading)

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Peter | 1 Aug 05:11
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Re: [EE] Production qty Analog Devices DSP Blackfin - long ETA - opinions please

Thanks for your time and input.

As I suspected... that went down like a lead balloon!  I am still being 
asked to find 4000, by Dec07, but (Sept07 was spoken about..err).  I 
spoke, with my local rep, from Arrow Electronics, let's wait and see. 
Don't you hate when hierarchy make design decisions, but fail to check 
lead times.  Then it's someone else's problem to fix.  As in 
...are..."me"  As I was working on another project, and haven't been 
part of these decisions.

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Alan B. Pearce | 1 Aug 10:01
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Re: [PIC] What to do with unused pins?

>> Even "stay in bed all day" while usually safish, cannot be relied on
>> :-)
>
>
>Damn.

Yep, I'm afraid the resulting bedsores are worse than the problems of 
getting up and doing something ;)) 

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Alan B. Pearce | 1 Aug 10:20
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Re: [EE] Production qty Analog Devices DSP Blackfin - long ETA -opinions please

>As I suspected... that went down like a lead balloon!  I am still
>being asked to find 4000, by Dec07, but (Sept07 was spoken about..err).
>I spoke, with my local rep, from Arrow Electronics, let's wait and see.
>Don't you hate when hierarchy make design decisions, but fail to check
>lead times.  Then it's someone else's problem to fix.  As in
>...are..."me"  As I was working on another project, and haven't been
>part of these decisions.

Sounds like it is time to go to the monthly meeting and say "what part of 
'not in production yet' do you not understand?"

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Russell McMahon | 1 Aug 12:46
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Re: [PIC] What to do with unused pins?

>>> Even "stay in bed all day" while usually safish, cannot be relied 
>>> on
>>> :-)

>>Damn.

> Yep, I'm afraid the resulting bedsores are worse than the problems 
> of
> getting up and doing something ;))

The example that always comes to mind is flight 103 & Lockerbie :-(

A moving visit.

            http://others.servebeer.com/misc/Lockerbie.jpg
            http://others.servebeer.com/misc/Lockerbie2.jpg

            Russell

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Peter Bindels | 1 Aug 14:13
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Re: [OT] Firefox security gripe

On 27/07/07, Herbert Graf <mailinglist3 <at> farcite.net> wrote:
> IE OTOH may crash less, but in almost every case a crashing IE takes a
> good chunk of the system with it. Often Explorer goes with IE, meaning
> all the task bar stuff disappears when Explorer restarts. That's on a
> good day, I've seen cases where IE crashing cases Explorer to crash and
> NOT respawn, leaving you with a windows system that is basically useless
> unless you reboot.

Ctrl-shift-esc, file->run, explorer.exe. Happened so often I got
annoyed and figured out how to fix it without rebooting.
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Gerhard Fiedler | 1 Aug 14:15

Re: [EE] Java to applet for web site.

James Newton, Host wrote:

>> I'm not sure what exactly the problem is you're trying to solve with the
>> conversion to an applet. Running a Java app can be as simple as
>> downloading the jar file and double-clicking on it, and you're done
>> with it. 
> 
> The issue is one of presentation. I don't want to type volumes of
> explanatory text into the circuit design as text labels. And I would
> like each of the samples to accompany the text in the web page. "As you
> can see in the applet window below, the counter is formed from three JK
> flip flops and their binary output is decoded to sequential (decimal)
> wires to enable each of the different operations required in the
> processor in the proper order."

In that case, it seems you don't want the applet to necessarily allow
loading and saving arbitrary files. Loading files from the server would be
enough, and saving is not necessary. You could just take the source, follow
the few simple steps in that link I sent and see whether it works.
Depending on the app it just might... (The app supporting loading a
simulation file through the command line helps.) 

Alternatively...

> In addition to the text, I want to include pictures of the real chips that
> are being used in the circuit, links to sources and other web sites, and to
> the next lesson or sample circuit.
> 
> I could take the hours required to produce GIF animations of the circuits
> operating, but that would remove any user interaction. "press the button
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David VanHorn | 1 Aug 14:58
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Re: [PIC] What to do with unused pins?

On 7/31/07, John Chung <kravnus <at> yahoo.com> wrote:
> Where are you guys sourcing resistors*good quality*
> from? I need them in small quantities.

www.digikey.com
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Gmane