Driver to drive?

[Martin Brown]

Paul Keinanen wrote:

On Thu, 29 Oct 2009 08:12:41 -0400, "vaughn"
vaughnsimonHATESSPAM@gmail.FAKE.com> wrote:

nospam@nevis.com> wrote in message news:4ae8ff39$1@news.x-privat.org...
For a laptop, printer and a couple of 15 watt compact florescent lights?
Hardly a huge expense, with 1000watt inverters $100.00 on ebay, a couple
of Sams' club deep cycle batteries ?

Actually for system you don't really need inverters at all. I use
12-volt compact florescent lamps,

Which definitely contains an inverter, thus, adding cost.

Although they are cheaply mass produced as emergency standby lights.
And pure solid state LED based units are still more expensive.

I use the lamps out in my yard, and my in-home 12-volt wiring
system is slowly growing.

This is a good strategy if the 12 V system total cost is less than the
cost of more common 120 V (US) or 230 V (Europe) systems added with
the inverter cost.

Although you really need to pay attention to the current flowing in a
low voltage DC wiring system. It takes a lot more of a percentage when
you drop half a volt off 12v than the same drop on 120 or 240v.

And to deliver the same power into the load takes 10x or 20x the current
on a 12v service. Useful if you are off grid but not so good in winter
at my latitude. Not enough winter sun to keep things topped up.

Wind power is a bit better in that respect if you have the space.

Regards,
Martin Brown

 

[Josepi]

Wgat was that supposed to be?

<a7yvm109gf5d1@netzero.com> wrote in message
news:305c101e-c676-4dbe-b058-d12784803fb6@g23g2000vbr.googlegroups.com...

________)
(, / /)
/ ___, _ (/_ ___
/ ( _ (_(_ _/(__ (_/ _(_)(_(_
(_/ .-/
(_/

 

[Phil Allison]

"Raveninghorde"

One of my chaps is off to do his PhD, which means he will know a lot
about nothing.

He asked me the other day if reversing the 24V AC power supply to a
board had caused damage to an elctrolytic capacitor. I don't think
you have to know the circuit to answer the question.

Talk about not understanding what he knows.

* Messrs Abbott and Costello famously said:

PhD stands for Pin headed Dope.



.... Phil

 

On Thu, 29 Oct 2009 09:31:53 -0400, "Josepi" <JRM@invalid..com> wrote:

Ten years from batteries? Not if you actually used them and didn't just
keep them on float.

I have heard this story over and over from manufacturers but I have not
heard of anybody, actually using their batteries and discharging them each
night to a resonable level, that gets more than a few years of dependable
usage out of them.

My batteries are 14 years old and still going strong. There's a pretty
good chance they'll make 20, which is their nominal lifetime rating.
They're the bare minimum size in the context of my consumption -
generally between 12 and 15kWh per day. Only a fraction of that makes
a trip through the batteries, which is as it should be for any
well-managed setup.

Wayne

 

[Jim Thompson]

On Thu, 29 Oct 2009 11:09:20 +0000, Raveninghorde
<raveninghorde@invalid> wrote:

One of my chaps is off to do his PhD, which means he will know a lot
about nothing.

He asked me the other day if reversing the 24V AC power supply to a
board had caused damage to an elctrolytic capacitor. I don't think
you have to know the circuit to answer the question.

Talk about not understanding what he knows.

PhD == Piled Higher and Deeper

...Jim Thompson
--
| James E.Thompson, CTO | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

"Somebody had to build the ceiling...
before Michelangelo could go to work."
- John Ratzenberger

http://analog-innovations.com/SED/Somebody_had_to_build_the_ceiling.pdf

 

[Michael A. Terrell]

nospam@nevis.com wrote:

Michael A. Terrell wrote:

What guarantee do you have that the seller will be in business next
year, let alone 15 years from now?

And the sun could snuff out tomorrow, life is chancy. With your
viewpoint we'd all still be huddled around the fire afraid of
the dark. There are no 100% guarantees about anything but your own
mortality.

Yawn. I built a 48 VDC powered KU band communications system for the
International Space Station while working at Microdyne. Lockheed-Martin
packaged it into one of the custom rack modules and supplied the
modified remote control software to NASA. It was a modifed Microdyne
'700 Series' design.

Cheap and long life just don't go together on batteries. If someone
actually did discover how to do it, they would own the market in a very
short time.

Huddle all you want, around your jury-rigged toys. As far as the
fire, you might get that from you overloaded and under designed 12 volt
wiring.


--
The movie 'Deliverance' isn't a documentary!

 

[WangoTango]

In article <veaje5lh4sfng3ljjpvn2e95nu7b6i1b0l@4ax.com>, To-Email-Use-
The-Envelope-Icon@My-Web-Site.com says...

On Thu, 29 Oct 2009 11:09:20 +0000, Raveninghorde
raveninghorde@invalid> wrote:

One of my chaps is off to do his PhD, which means he will know a lot
about nothing.

He asked me the other day if reversing the 24V AC power supply to a
board had caused damage to an elctrolytic capacitor. I don't think
you have to know the circuit to answer the question.

Talk about not understanding what he knows.

PhD == Piled Higher and Deeper

A lot of folks around here have PhDs (Post Hole Diggers).

 

[Ian Bell]

Raveninghorde wrote:

One of my chaps is off to do his PhD, which means he will know a lot
about nothing.

He asked me the other day if reversing the 24V AC power supply to a
board had caused damage to an elctrolytic capacitor. I don't think
you have to know the circuit to answer the question.

Talk about not understanding what he knows.

Sounds like he already knows a lot about nothing. No need to send him
for a PhD.

Cheers

Ian

 

[Raveninghorde]

On Thu, 29 Oct 2009 15:52:51 +0000, Ian Bell <ruffrecords@yahoo.com>
wrote:

Raveninghorde wrote:
One of my chaps is off to do his PhD, which means he will know a lot
about nothing.

He asked me the other day if reversing the 24V AC power supply to a
board had caused damage to an elctrolytic capacitor. I don't think
you have to know the circuit to answer the question.

Talk about not understanding what he knows.


Sounds like he already knows a lot about nothing. No need to send him
for a PhD.

Cheers

Ian

I'm not sending him.

He's from a culture that respects qualifications not achievements. I
think respect for the Word prevents one being willing to challange
received wisdom.

To be fair to him he'll do well in a non design environment.

 

[Jim Thompson]

On Thu, 29 Oct 2009 16:18:39 +0000, Raveninghorde
<raveninghorde@invalid> wrote:

On Thu, 29 Oct 2009 15:52:51 +0000, Ian Bell <ruffrecords@yahoo.com
wrote:

Raveninghorde wrote:
One of my chaps is off to do his PhD, which means he will know a lot
about nothing.

He asked me the other day if reversing the 24V AC power supply to a
board had caused damage to an elctrolytic capacitor. I don't think
you have to know the circuit to answer the question.

Talk about not understanding what he knows.


Sounds like he already knows a lot about nothing. No need to send him
for a PhD.

Cheers

Ian

I'm not sending him.

He's from a culture that respects qualifications not achievements. I
think respect for the Word prevents one being willing to challange
received wisdom.

To be fair to him he'll do well in a non design environment.

I've made LOTS of money from fixing circuits for PhD's, then returning
again and again and again to fix what they changed after I left ;-)

...Jim Thompson
--
| James E.Thompson, CTO | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

"Somebody had to build the ceiling...
before Michelangelo could go to work."
- John Ratzenberger

http://analog-innovations.com/SED/Somebody_had_to_build_the_ceiling.pdf

 

Michael A. Terrell wrote:

nospam@nevis.com wrote:
Michael A. Terrell wrote:
What guarantee do you have that the seller will be in business next
year, let alone 15 years from now?
And the sun could snuff out tomorrow, life is chancy. With your
viewpoint we'd all still be huddled around the fire afraid of
the dark. There are no 100% guarantees about anything but your own
mortality.


Yawn. I built a 48 VDC powered KU band communications system for the
International Space Station while working at Microdyne. Lockheed-Martin
packaged it into one of the custom rack modules and supplied the
modified remote control software to NASA. It was a modifed Microdyne
'700 Series' design.

Cheap and long life just don't go together on batteries. If someone
actually did discover how to do it, they would own the market in a very
short time.

Huddle all you want, around your jury-rigged toys. As far as the
fire, you might get that from you overloaded and under designed 12 volt
wiring.

Don't tell grandma how to suck eggs. I built my first solar water heater
in 1971 (the unit is still functioning) and worked on the first R-2000
homes in North America back in 1973. We built a completely off grid
super insulated home in 1998/99 with Hydronic radiant floor heating,
solar hot water and PV.

 

[Hammy]

On Thu, 29 Oct 2009 11:09:20 +0000, Raveninghorde
<raveninghorde@invalid> wrote:

One of my chaps is off to do his PhD, which means he will know a lot
about nothing.

He asked me the other day if reversing the 24V AC power supply to a
board had caused damage to an elctrolytic capacitor. I don't think
you have to know the circuit to answer the question.

Talk about not understanding what he knows.

Not surprising.Have you read any IEEE papers most of those pea brains
have PHD's.

I'm surprised more people aren't killed from shoddy consumer and for
that matter industrial electronics.

 

[Rich Grise]

On Thu, 29 Oct 2009 11:09:20 +0000, Raveninghorde wrote:

One of my chaps is off to do his PhD, which means he will know a lot about
nothing.

He asked me the other day if reversing the 24V AC power supply to a board
had caused damage to an elctrolytic capacitor. I don't think you have to
know the circuit to answer the question.

Talk about not understanding what he knows.

You should send this to Scott Adams for his "True tales of induhviduals"
segment. ;-)

Cheers!

Rich

 

[Jim Thompson]

On Thu, 29 Oct 2009 10:04:00 -0700 (PDT), osr@uakron.edu wrote:

Not surprising.Have you read any IEEE papers most of those pea brains
have PHD's.


They have to have a doctorate or a masters, or your not really allowed
to publish in most refereed journals, unless your a student working
with a PhD..

I'm dealing with a situation where a friend doesn't have the right
"qualifications" to publish. He came up with something earthshaking,
new, useful, and novel, patented it, licensed it etc, Now wants to
further it along, and publish what he found. His condition for
working with the pointy haired crowd, simply his name is on the
byline, he'd even fund the research. He knows the science better then
most postdocs in the field.

So far no takers.

Steve

When I google I search "search phrase" -IEEE -WIPO -patent -portal ;-)

...Jim Thompson
--
| James E.Thompson, CTO | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

"Somebody had to build the ceiling...
before Michelangelo could go to work."
- John Ratzenberger

http://analog-innovations.com/SED/Somebody_had_to_build_the_ceiling.pdf

 

[Dirk Bruere at NeoPax]

Michael A. Terrell wrote:

Dirk Bruere at NeoPax wrote:
Michael A. Terrell wrote:
nospam@nevis.com wrote:
Michael A. Terrell wrote:
nospam@nevis.com wrote:
TheM wrote:
"vaughn" <vaughnsimonHATESSPAM@gmail.FAKE.com> wrote in message news:hc7utq$1a1$1@news.eternal-september.org...
"Don Lancaster" <don@tinaja.com> wrote in message news:7kooa3F39fllbU1@mid.individual.net...
For net energy, a quarter per peak pv watt is needed.

Even then, it would be many years after a quarter per watt for actual breakeven, owing to all the previously lost energy.

Huh? I usually agree with Don on these things, but here he seems to be confusing energy break even with economic break even. I a
perfect world they might be comparable, but I doubt if that is true in the real world.

Vaughn
I think what he wants to say is that energy break even is many years down the road,
possibly decades. And fixing and maintaining it might kill the small net energy surplus.
And before we get to break even we might have new, much better technology.

M



Who knows, but for a $1.98 a watt it's a good deal if you want to give
it a go. I know I could run my home office off a couple of panels
(laptop, printer etc.)Even having a couple would keep the lights on
in an emergency.
If there is enough sun to power the lights, you don't need them.


After 4pm six months of the year, yes I do need lights.

The solar panels are worthless for that use without expensive, short
lived batteries.
Cheap deep cycle batteries with a 15 year guarantee are available


What guarantee do you have that the seller will be in business next
year, let alone 15 years from now?

The manufacturer is likely to be.

--
Dirk

http://www.transcendence.me.uk/ - Transcendence UK
http://www.theconsensus.org/ - A UK political party
http://www.blogtalkradio.com/onetribe - Occult Talk Show

 

What amazes me is the world still funds the PhD system.

Steve

 

[Dirk Bruere at NeoPax]

vaughn wrote:

nospam@nevis.com> wrote in message news:4ae8ff39$1@news.x-privat.org...
For a laptop, printer and a couple of 15 watt compact florescent lights?
Hardly a huge expense, with 1000watt inverters $100.00 on ebay, a couple
of Sams' club deep cycle batteries ?

Actually for system you don't really need inverters at all. I use
12-volt compact florescent lamps, and 12 volt adapters are available for
laptops. I use the lamps out in my yard, and my in-home 12-volt wiring
system is slowly growing.

Does a low voltage DC house supply make sense?
It's looking like it for lighting.

--
Dirk

http://www.transcendence.me.uk/ - Transcendence UK
http://www.theconsensus.org/ - A UK political party
http://www.blogtalkradio.com/onetribe - Occult Talk Show

 

Not surprising.Have you read any IEEE papers most of those pea brains
have PHD's.

They have to have a doctorate or a masters, or your not really allowed
to publish in most refereed journals, unless your a student working
with a PhD..

I'm dealing with a situation where a friend doesn't have the right
"qualifications" to publish. He came up with something earthshaking,
new, useful, and novel, patented it, licensed it etc, Now wants to
further it along, and publish what he found. His condition for
working with the pointy haired crowd, simply his name is on the
byline, he'd even fund the research. He knows the science better then
most postdocs in the field.

So far no takers.

Steve

 

[Joerg]

osr@uakron.edu wrote:

Not surprising.Have you read any IEEE papers most of those pea brains
have PHD's.


They have to have a doctorate or a masters, or your not really allowed
to publish in most refereed journals, unless your a student working
with a PhD..

One of the huge mistakes in academia. Right up there with universities
and colleges not allowing practicing engineers to teach because they
don't have the "proper credentials".

I'm dealing with a situation where a friend doesn't have the right
"qualifications" to publish. He came up with something earthshaking,
new, useful, and novel, patented it, licensed it etc, Now wants to
further it along, and publish what he found. His condition for
working with the pointy haired crowd, simply his name is on the
byline, he'd even fund the research. He knows the science better then
most postdocs in the field.

So far no takers.

Why not self-publish it on a web site and make sure search engines find
it? You can format it just like a scientific publication and there's
nothing the ivory tower guys can do against it.

--
Regards, Joerg

http://www.analogconsultants.com/

"gmail" domain blocked because of excessive spam.
Use another domain or send PM.

 

[Vladimir Vassilevsky]

Joerg wrote:

One of the huge mistakes in academia. Right up there with universities
and colleges not allowing practicing engineers to teach because they
don't have the "proper credentials".

It's normal. Each closed group supports their status and defends itself
from intruders using whatever reasons. BTW, try practicing law or
medicine without proper credentials. And would you remind what is
exactly P.E. about?

VLV