Device driver - CS, CE or EE degree

10 Farad of electrolytic rated at 600V – Dave, are you kidding me?-:slight_smile: I mean I only saw caps in the range of Farad in homework questions. The last home brew crazy discrete class AB audio amp I built uses 2 10,000 micro Farad/100V electrolytics, I have enough trouble to find an enclosure for her.

The link below shows a 100 MILLI Farad rated only 10V. Look at the size. I’m not sure if you can fit your 10F/600V electrolytic in a shopping cart if that exists.

http://cgi.ebay.com/Boom-Box-Electrolytic-Capacitor.-100,000UF-10V-DC_W0QQitemZ260323449011QQcmdZViewItem

Calvin Guan
Broadcom Corp.
Connecting Everything(r)

— On Mon, 6/22/09, David R. Cattley wrote:

> From: David R. Cattley
> Subject: RE: [ntdev] Device driver - CS, CE or EE degree
> To: “Windows System Software Devs Interest List”
> Date: Monday, June 22, 2009, 10:18 AM
> Geez, Mark.? It was a pretty
> common stunt in EE lab to charge up a big
> electrolytic, with the leads folded over carefully to the
> side and toss it
> to some newby across the lab :slight_smile:
>
> If they caught it, they remembered it - and leaned to step
> out of the way
> next time.? Of course these were not ten Farad devices
> with 600 volts
> applied - that would be cruel.
>
> But now capacitors you can see are a novelty in circuit
> design outside of
> the power supplies.? The labs are probably pretty safe
> ;)? ? Now that giant
> thing supplying the impulse current to Scott’s car stereo
> subwoofer is
> another matter …
>
> Cheers,
> -dave
>
>
>
> -----Original Message-----
> From: xxxxx@lists.osr.com
> [mailto:xxxxx@lists.osr.com]
> On Behalf Of Mark Cariddi
> Sent: Monday, June 22, 2009 1:03 PM
> To: Windows System Software Devs Interest List
> Subject: RE: [ntdev] Device driver - CS, CE or EE degree
>
> I actually went to college to get a CE
> degree.???2 months into the
> semester I picked up a charged capacitor by the leads (dumb
> mistake 1,
> student left capacitor charged.???Stupid
> mistake 2, I picked it up by
> the leads), got thrown across the room, and had an eye that
> twitched for
> 2 weeks.???Software is safer in my book…
>
> --Mark Cariddi
> Consulting Associate
> OSR…
>
>
> -----Original Message-----
> From: xxxxx@lists.osr.com
> [mailto:xxxxx@lists.osr.com]
> On Behalf Of
> xxxxx@hotmail.com
> Sent: Monday, June 22, 2009 12:47 PM
> To: ntdev redirect
> Subject: RE:[ntdev] Device driver - CS, CE or EE degree
>
> > If you have a solid understanding of what makes a
> computer tick, and
> are thoroughly versed
> > in operating system mechanisms, you will always be in
> high demand.
>
> You seem to be much too optimistic…
>
> > today there are fewer and fewer people who understand
> how an operating
> system works.
>
> …probably, just because demand for this kind of knowledge
> gets lower
> and lower everywhere, apart from few specific locations on
> the globe???
>
> Anton Bassov
>
> —
> NTDEV is sponsored by OSR
>
> For our schedule of WDF, WDM, debugging and other seminars
> visit:
> http://www.osr.com/seminars
>
> To unsubscribe, visit the List Server section of OSR Online
> at
> http://www.osronline.com/page.cfm?name=ListServer
>
> —
> NTDEV is sponsored by OSR
>
> For our schedule of WDF, WDM, debugging and other seminars
> visit:
> http://www.osr.com/seminars
>
> To unsubscribe, visit the List Server section of OSR Online
> at
> http://www.osronline.com/page.cfm?name=ListServer
>
>
> —
> NTDEV is sponsored by OSR
>
> For our schedule of WDF, WDM, debugging and other seminars
> visit:
> http://www.osr.com/seminars
>
> To unsubscribe, visit the List Server section of OSR Online
> at http://www.osronline.com/page.cfm?name=ListServer
>

(well, another thread down the tubes… bye bye thread!)

Dude! 2 FARAD capacitors are common… and even 20 FARAD capacitors are not unheard of… in THUMPING loud car audio systems (and even in some ham radio uses) to act as reservoirs for big instantaneous current draws.

http://www.amazon.com/Power-Acoustik-PCX-20F-20-Farad-Capacitor/dp/B001582T0K

Peter

The cap in that ad is only about 1 1/2-2 inches in diameter. The close-up
picture with large items in the background are misleading.

I regularly see 100F now caps sold as bypass caps for high-power car audio
equipment. They somehow figured out how to get those huge values into much
smaller spaces than were possible 5-10 years ago.

Greg

-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of Calvin Guan
Sent: Monday, June 22, 2009 1:27 PM
To: Windows System Software Devs Interest List
Subject: RE: [ntdev] Device driver - CS, CE or EE degree

10 Farad of electrolytic rated at 600V – Dave, are you kidding me?-:slight_smile: I
mean I only saw caps in the range of Farad in homework questions. The last
home brew crazy discrete class AB audio amp I built uses 2 10,000 micro
Farad/100V electrolytics, I have enough trouble to find an enclosure for
her.

The link below shows a 100 MILLI Farad rated only 10V. Look at the size. I’m
not sure if you can fit your 10F/600V electrolytic in a shopping cart if
that exists.

http://cgi.ebay.com/Boom-Box-Electrolytic-Capacitor.-100,000UF-10V-DC_W0QQit
emZ260323449011QQcmdZViewItem

Calvin Guan
Broadcom Corp.
Connecting Everything(r)

— On Mon, 6/22/09, David R. Cattley wrote:

> From: David R. Cattley
> Subject: RE: [ntdev] Device driver - CS, CE or EE degree
> To: “Windows System Software Devs Interest List”
> Date: Monday, June 22, 2009, 10:18 AM
> Geez, Mark.? It was a pretty
> common stunt in EE lab to charge up a big electrolytic, with the leads
> folded over carefully to the side and toss it to some newby across the
> lab :slight_smile:
>
> If they caught it, they remembered it - and leaned to step out of the
> way next time.? Of course these were not ten Farad devices with 600
> volts applied - that would be cruel.
>
> But now capacitors you can see are a novelty in circuit design outside
> of the power supplies.? The labs are probably pretty safe
> ;)? ? Now that giant
> thing supplying the impulse current to Scott’s car stereo subwoofer is
> another matter …
>
> Cheers,
> -dave
>
>
>
> -----Original Message-----
> From: xxxxx@lists.osr.com
> [mailto:xxxxx@lists.osr.com]
> On Behalf Of Mark Cariddi
> Sent: Monday, June 22, 2009 1:03 PM
> To: Windows System Software Devs Interest List
> Subject: RE: [ntdev] Device driver - CS, CE or EE degree
>
> I actually went to college to get a CE degree.???2 months into the
> semester I picked up a charged capacitor by the leads (dumb mistake 1,
> student left capacitor charged.???Stupid mistake 2, I picked it up by
> the leads), got thrown across the room, and had an eye that twitched
> for
> 2 weeks.???Software is safer in my book…
>
> --Mark Cariddi
> Consulting Associate
> OSR…
>
>
> -----Original Message-----
> From: xxxxx@lists.osr.com
> [mailto:xxxxx@lists.osr.com]
> On Behalf Of
> xxxxx@hotmail.com
> Sent: Monday, June 22, 2009 12:47 PM
> To: ntdev redirect
> Subject: RE:[ntdev] Device driver - CS, CE or EE degree
>
> > If you have a solid understanding of what makes a
> computer tick, and
> are thoroughly versed
> > in operating system mechanisms, you will always be in
> high demand.
>
> You seem to be much too optimistic…
>
> > today there are fewer and fewer people who understand
> how an operating
> system works.
>
> …probably, just because demand for this kind of knowledge gets lower
> and lower everywhere, apart from few specific locations on the
> globe???
>
> Anton Bassov
>
> —
> NTDEV is sponsored by OSR
>
> For our schedule of WDF, WDM, debugging and other seminars
> visit:
> http://www.osr.com/seminars
>
> To unsubscribe, visit the List Server section of OSR Online at
> http://www.osronline.com/page.cfm?name=ListServer
>
> —
> NTDEV is sponsored by OSR
>
> For our schedule of WDF, WDM, debugging and other seminars
> visit:
> http://www.osr.com/seminars
>
> To unsubscribe, visit the List Server section of OSR Online at
> http://www.osronline.com/page.cfm?name=ListServer
>
>
> —
> NTDEV is sponsored by OSR
>
> For our schedule of WDF, WDM, debugging and other seminars
> visit:
> http://www.osr.com/seminars
>
> To unsubscribe, visit the List Server section of OSR Online at
> http://www.osronline.com/page.cfm?name=ListServer
>


NTDEV is sponsored by OSR

For our schedule of WDF, WDM, debugging and other seminars visit:
http://www.osr.com/seminars

To unsubscribe, visit the List Server section of OSR Online at
http://www.osronline.com/page.cfm?name=ListServer

Calvin,

Hyperbole for effect :slight_smile:

Although I did get to work with some *very* high power laser systems that
did have storage banks in excess of that kind of charge capacity but yeah,
throwing one of those would have required a small trebuchet or a really big
rubber band :slight_smile:

But have you seen some of the stuff they sell in car audio these days? My
goodness, it is either market BS aimed at people with more money than brains
(and hearing acuity) or the materials science dudes have found ways to hide
electrons in every corner of a cap.

Cheers,
-dave

-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of Calvin Guan
Sent: Monday, June 22, 2009 2:27 PM
To: Windows System Software Devs Interest List
Subject: RE: [ntdev] Device driver - CS, CE or EE degree

10 Farad of electrolytic rated at 600V – Dave, are you kidding me?-:slight_smile: I
mean I only saw caps in the range of Farad in homework questions. The last
home brew crazy discrete class AB audio amp I built uses 2 10,000 micro
Farad/100V electrolytics, I have enough trouble to find an enclosure for
her.

The link below shows a 100 MILLI Farad rated only 10V. Look at the size. I’m
not sure if you can fit your 10F/600V electrolytic in a shopping cart if
that exists.

http://cgi.ebay.com/Boom-Box-Electrolytic-Capacitor.-100,000UF-10V-DC_W0QQit
emZ260323449011QQcmdZViewItem

Calvin Guan
Broadcom Corp.
Connecting Everything(r)

— On Mon, 6/22/09, David R. Cattley wrote:

> From: David R. Cattley
> Subject: RE: [ntdev] Device driver - CS, CE or EE degree
> To: “Windows System Software Devs Interest List”
> Date: Monday, June 22, 2009, 10:18 AM
> Geez, Mark.? It was a pretty
> common stunt in EE lab to charge up a big
> electrolytic, with the leads folded over carefully to the
> side and toss it
> to some newby across the lab :slight_smile:
>
> If they caught it, they remembered it - and leaned to step
> out of the way
> next time.? Of course these were not ten Farad devices
> with 600 volts
> applied - that would be cruel.
>
> But now capacitors you can see are a novelty in circuit
> design outside of
> the power supplies.? The labs are probably pretty safe
> ;)? ? Now that giant
> thing supplying the impulse current to Scott’s car stereo
> subwoofer is
> another matter …
>
> Cheers,
> -dave
>
>
>
> -----Original Message-----
> From: xxxxx@lists.osr.com
> [mailto:xxxxx@lists.osr.com]
> On Behalf Of Mark Cariddi
> Sent: Monday, June 22, 2009 1:03 PM
> To: Windows System Software Devs Interest List
> Subject: RE: [ntdev] Device driver - CS, CE or EE degree
>
> I actually went to college to get a CE
> degree.???2 months into the
> semester I picked up a charged capacitor by the leads (dumb
> mistake 1,
> student left capacitor charged.???Stupid
> mistake 2, I picked it up by
> the leads), got thrown across the room, and had an eye that
> twitched for
> 2 weeks.???Software is safer in my book…
>
> --Mark Cariddi
> Consulting Associate
> OSR…
>
>
> -----Original Message-----
> From: xxxxx@lists.osr.com
> [mailto:xxxxx@lists.osr.com]
> On Behalf Of
> xxxxx@hotmail.com
> Sent: Monday, June 22, 2009 12:47 PM
> To: ntdev redirect
> Subject: RE:[ntdev] Device driver - CS, CE or EE degree
>
> > If you have a solid understanding of what makes a
> computer tick, and
> are thoroughly versed
> > in operating system mechanisms, you will always be in
> high demand.
>
> You seem to be much too optimistic…
>
> > today there are fewer and fewer people who understand
> how an operating
> system works.
>
> …probably, just because demand for this kind of knowledge
> gets lower
> and lower everywhere, apart from few specific locations on
> the globe???
>
> Anton Bassov
>
> —
> NTDEV is sponsored by OSR
>
> For our schedule of WDF, WDM, debugging and other seminars
> visit:
> http://www.osr.com/seminars
>
> To unsubscribe, visit the List Server section of OSR Online
> at
> http://www.osronline.com/page.cfm?name=ListServer
>
> —
> NTDEV is sponsored by OSR
>
> For our schedule of WDF, WDM, debugging and other seminars
> visit:
> http://www.osr.com/seminars
>
> To unsubscribe, visit the List Server section of OSR Online
> at
> http://www.osronline.com/page.cfm?name=ListServer
>
>
> —
> NTDEV is sponsored by OSR
>
> For our schedule of WDF, WDM, debugging and other seminars
> visit:
> http://www.osr.com/seminars
>
> To unsubscribe, visit the List Server section of OSR Online
> at http://www.osronline.com/page.cfm?name=ListServer
>


NTDEV is sponsored by OSR

For our schedule of WDF, WDM, debugging and other seminars visit:
http://www.osr.com/seminars

To unsubscribe, visit the List Server section of OSR Online at
http://www.osronline.com/page.cfm?name=ListServer

I think Calvin was (correctly) calling me out on the 600v rating though
surely some hamshack somewhere has enough coffee cans and oil to build even
that.

-dave

-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of xxxxx@osr.com
Sent: Monday, June 22, 2009 2:39 PM
To: Windows System Software Devs Interest List
Subject: RE:[ntdev] Device driver - CS, CE or EE degree

(well, another thread down the tubes… bye bye thread!)

Dude! 2 FARAD capacitors are common… and even 20 FARAD capacitors are not
unheard of… in THUMPING loud car audio systems (and even in some ham radio
uses) to act as reservoirs for big instantaneous current draws.

http://www.amazon.com/Power-Acoustik-PCX-20F-20-Farad-Capacitor/dp/B001582T0
K

Peter


NTDEV is sponsored by OSR

For our schedule of WDF, WDM, debugging and other seminars visit:
http://www.osr.com/seminars

To unsubscribe, visit the List Server section of OSR Online at
http://www.osronline.com/page.cfm?name=ListServer


(well, another thread down the tubes… bye bye thread!)

Ya think the OP has figured out who the EEs are?

:wink:

Let ME guess: The ones who pay attention to stuff like the voltage rating of capacitors and not just the capacitance?

Did you know that newer versions of the old school oil-saturated capacitors are “quite the thing” for audio use? Yeah… they sell them for like $100 each. The even have 600V (no kidding) caps (well, 1uf at 600V).

Peter

Yikes, back in the late 50’s early 60’s I was buy boxes on 1 and 10 farad
caps with higher voltage ratings than that for $5. There was a local junk
yard that was taking them out of WWII radar sets. Each one was about the
size of a beer can.


Don Burn (MVP, Windows DDK)
Windows Filesystem and Driver Consulting
Website: http://www.windrvr.com
Blog: http://msmvps.com/blogs/WinDrvr

wrote in message news:xxxxx@ntdev…
>


>
> Let ME guess: The ones who pay attention to stuff like the voltage rating
> of capacitors and not just the capacitance?
>
> Did you know that newer versions of the old school oil-saturated
> capacitors are “quite the thing” for audio use? Yeah… they sell them
> for like $100 each. The even have 600V (no kidding) caps (well, 1uf at
> 600V).
>
> Peter
>
>
>
> Information from ESET NOD32 Antivirus, version of virus
> signature database 4179 (20090622)

>
> The message was checked by ESET NOD32 Antivirus.
>
> http://www.eset.com
>
>
>

Information from ESET NOD32 Antivirus, version of virus signature database 4179 (20090622)

The message was checked by ESET NOD32 Antivirus.

http://www.eset.com

Can we start a business selling them as iPod accessories to the unwary? I
got cans and white spray-paint here in the garage. Might have some old
quarts of Castrol 20w40 that I forgot to throw away when the Fiat left 20
years ago. It could be a (short lived) bonanza! I’m sure Calvin has a
soldering iron…

:wink:

-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of xxxxx@osr.com
Sent: Monday, June 22, 2009 3:18 PM
To: Windows System Software Devs Interest List
Subject: RE:[ntdev] Device driver - CS, CE or EE degree

Let ME guess: The ones who pay attention to stuff like the voltage rating of
capacitors and not just the capacitance?

Did you know that newer versions of the old school oil-saturated capacitors
are “quite the thing” for audio use? Yeah… they sell them for like $100
each. The even have 600V (no kidding) caps (well, 1uf at 600V).

Peter


NTDEV is sponsored by OSR

For our schedule of WDF, WDM, debugging and other seminars visit:
http://www.osr.com/seminars

To unsubscribe, visit the List Server section of OSR Online at
http://www.osronline.com/page.cfm?name=ListServer

Hmmm … dunno about that … I’ve had a PC power supply literally blow up
in my face while working on the software for a storage driver. Now, THAT
casued a need for clean underware. Right in the middle of debug as I recall.
And no, folks, it was not my driver. The supply simply gave up the ghost …
very loudly.

The personal opinion of
Gary G. Little

-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of Mark Cariddi
Sent: Monday, June 22, 2009 12:03 PM
To: Windows System Software Devs Interest List
Subject: RE: [ntdev] Device driver - CS, CE or EE degree

I actually went to college to get a CE degree. 2 months into the
semester I picked up a charged capacitor by the leads (dumb mistake 1,
student left capacitor charged. Stupid mistake 2, I picked it up by
the leads), got thrown across the room, and had an eye that twitched for
2 weeks. Software is safer in my book…

–Mark Cariddi
Consulting Associate
OSR…

-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of
xxxxx@hotmail.com
Sent: Monday, June 22, 2009 12:47 PM
To: ntdev redirect
Subject: RE:[ntdev] Device driver - CS, CE or EE degree

If you have a solid understanding of what makes a computer tick, and
are thoroughly versed
in operating system mechanisms, you will always be in high demand.

You seem to be much too optimistic…

today there are fewer and fewer people who understand how an operating
system works.

…probably, just because demand for this kind of knowledge gets lower
and lower everywhere, apart from few specific locations on the globe???

Anton Bassov


NTDEV is sponsored by OSR

For our schedule of WDF, WDM, debugging and other seminars visit:
http://www.osr.com/seminars

To unsubscribe, visit the List Server section of OSR Online at
http://www.osronline.com/page.cfm?name=ListServer


NTDEV is sponsored by OSR

For our schedule of WDF, WDM, debugging and other seminars visit:
http://www.osr.com/seminars

To unsubscribe, visit the List Server section of OSR Online at
http://www.osronline.com/page.cfm?name=ListServer

When I went to university, MANY years ago, we weren’t expected to choose a major until sophomore year. I myself switched from civil engineering to mathematics in my junior year.
So maybe you don’t need to worry about this choice yet. I hope you will sample things that are of interest to you and then it will probably become more clear to you later in the process.
And a few years after you graduate, I don’t think it will matter much what your major was, because your real world experience will be more important.

>> If you have a solid understanding of what makes a computer tick, and are thoroughly versed

> in operating system mechanisms, you will always be in high demand.

You seem to be much too optimistic…

Maybe a bit, but I’m working in the Philadelphia area, not quite the software hub of the world. I was out of the industry for around nine years, but when I came back my current job found me. They were looking for a C++ guy with some system software experience. Not very lofty requirements. Most all of their applicants (mostly web guys) who claimed they knew C++ really only had a line or two on their resume indicating some C++ exposure. After they hired me, I was told that the minute I mentioned I had experience writing windows drivers, they knew they were going to offer me the job.

Maybe the competition out here in the cradle of liberty isn’t so fierce, but it shows these skills I picked up long ago are still keeping me marketable.

– Dan