Driver to drive?

[john jardine]

"ChrisGibboGibson" <chrisgibbogibson@aol.com> wrote in message
news:20041113114238.08238.00000601@mb-m04.aol.com...

Pooh Bear wrote:

[snip]

No European countries run on 230V to the best of my knowledge.


Legally, *all* European Union countries run on 230 volts.

The fact that, in practice, you will measure either 240 volts or 220 volts
does
not seem to deter the pillocks in Brussels.

Gibbo

It's usually 251V round here.

regards
john

 

[Winfield Hill]

Winfield Hill wrote...

I'm going to sign off now, get breakfast, and shovel the snow. :&gt
Then I'll poke around and find an old post of mine to edit and put
up as my entry for Numan's 150A linear regulator.

I came across this old beast, wihch uses 75 pass transistors, for
amusement. It's a 1.8V 250A quad Pentium linear regulator. :&gt

Winfield Hill wrote,

no-spam@baggypants.com wrote...
cant find any quad-pentium mobo for my cars computer, so i,m
designing my own but the 1.8V power supply is hard- it needs up
to 250 amps from the engines 42V batt. i NEED a seatwarmer to
anybody has aome thoughts?

Hi baggypants, you have two interesting problems, which I can solve with
one circuit. You should use what we call a linear regulator, because a
sensitive computer motherboard needs an electrically-quiet environment.

+42V ____ 350A breaker
(o)==|____|==+====+====+===+===+===+===+===+===+===+===+===+===+===+===,
| | | | | | | | | | | | | | |
,--+----+ | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | |
| 100 | | 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1
| 1W | | 75W 75W 75W 75W 75W 75W 75W 75W 75W 75W 75W 75W 75W
| | |/ | | | | | | | | | | | | | |
| +--| | | | | | | | | | | | | | |
| | |\ | 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1
| | V |/ 75W 75W 75W 75W 75W 75W 75W 75W 75W 75W 75W 75W 75W
| 100 +--| | | | | | | | | | | | | |
| 1W | |\ | | | | | | | | | | | | |
| | |/ V |/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/
| +--| +==|===|===|===|===|===|===|===|===|===|===|===|===|
| | |\ | |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
| | V |/ V V V V V V V V V V V V V
,---+ 100 +--| | | | | | | | | | | | | |
| | 1W | |\ | | | | | | | | | | | | |
| | | |/ V |/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/
2k2 | +--| +==|===|===|===|===|===|===|===|===|===|===|===|===|
| | | |\ | |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
| |/ | V |/ V V V V V V V V V V V V V
+-| 100 +--| | | | | | | | | | | | | |
| |\ 1W | |\ | | | | | | | | | | | | |
| V | |/ V |/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/
2k2 | +--| +==|===|===|===|===|===|===|===|===|===|===|===|===|
| | | |\ | |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
| |/ | V |/ V V V V V V V V V V V V V
+-| 100 +--| | | | | | | | | | | | | |
| |\ 1W | |\ | | | | | | | | | | | | |
| V | |/ V |/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/
| +--|--| +==|===|===|===|===|===|===|===|===|===|===|===|===|
| | | |\ | |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
| 1k0 | V |/ V V V V V V V V V V V V V
| | _|_ +--| | | | | | | | | | | | | |
| | \_/ | |\ | | | | | | | | | | | | |
| | | | V |/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/ |/
| | | | +==|===|===|===|===|===|===|===|===|===|===|===|===|
| '--+----|----+ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
+--, | | V V V V V V V V V V V V V
| \|_ 22 6.8 | | | | | | | | | | | | |
| /_\ 3W 10W 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1
| | 6.8V | | 75W 75W 75W 75W 75W 75W 75W 75W 75W 75W 75W 75W 75W
| | | | | | | | | | | | | | | | |
| '--------|----+----+===+===+=+=+++++===+===+===+===+===+===+===+==='
| | | | |||
| '----+---, | ||| +1.80V, 0 to 250A
| | | '++====(O)=============,,.
| 0.01 | | |||
'--+--||--, ,-----|----------|---------(O)--------, |||
| | | | | + sense \ |||
__|__ 2k7 562 | ,-----+ '--+++
| | | | | | | 2200uF |||
| |---+----+ | 1.5 |+ 6V QUAD PENTIUM
|_____| 1.25V | | 10W === |||
| 1k24 | | | ,--+++
| LMV431 | | | | - sense / |||
'-----------+-----|----|-----|------+--(o)--------' |||
RETURN | | | | |||
,--(o)--------------+----+-----+--33--' |||
==+========================================================'''

Circuit Notes: Twenty-eight places 2n5686 or equivalent NPN TO-3, mounted
on a pair of isolated leaf-blower heat sinks, with thin heat-sink grease,
and no insulating pads; each heat sink dissipates about 4kW at 250A> and
5kW under 300A short circuit condition. Each resistor bank dissipates up
to 0.7kW.

--
Thanks,
- Win

 

[ChrisGibboGibson]

Pooh Bear wrote:

[snip]

No European countries run on 230V to the best of my knowledge.

Legally, *all* European Union countries run on 230 volts.

The fact that, in practice, you will measure either 240 volts or 220 volts does
not seem to deter the pillocks in Brussels.

Gibbo

 

[ChrisGibboGibson]

"john jardine" wrote:

"ChrisGibboGibson" <chrisgibbogibson@aol.com> wrote in message
news:20041113114238.08238.00000601@mb-m04.aol.com...
Pooh Bear wrote:

[snip]

No European countries run on 230V to the best of my knowledge.


Legally, *all* European Union countries run on 230 volts.

The fact that, in practice, you will measure either 240 volts or 220 volts
does
not seem to deter the pillocks in Brussels.

Gibbo

It's usually 251V round here.

regards
john

You're only just within the legal limit.

I usually get around 210 at the end of the pontoon.

Thanks for the resistors, small one was perfect.

Gibbo

 

[John Fields]

On Sat, 13 Nov 2004 01:24:12 GMT, "Harry Dellamano"
<harryd@tdsystems.org> wrote:

Ok John Fields, this is for you. You remember a while ago when I stated that
LEDs run in voltage mode have some advantages over constant current mode and
you called me every name in the book. Well this is why some traffic lights
flash.

---
Some traffic lights flash because I called you every name in the book?
Odd...
---

As stated the LEDs must be Power Factor Corrected (PFC) and act like a
incandescent lamps which has a power factor of one.

---
Show me an LED with a reactance that matters below oh, I don't know...
a couple of hundred kHz, anyway, and I'll agree with you.
---

.... snipped a lot of irrelevant poop.


--
John Fields

 

[Kevin Aylward]

ChrisGibboGibson wrote:

But OP does just as much work by sending all the current back to the
supply company so they should pay him the same amount.

Count the electrons into OP's house, and count the electrons out of
OP's house. I bet they're pretty close in quantity.

Indeed it is. The net number is absolutely zero. Its AC. They only
vibrate about a bit.


Kevin Aylward
salesEXTRACT@anasoft.co.uk
http://www.anasoft.co.uk
SuperSpice, a very affordable Mixed-Mode
Windows Simulator with Schematic Capture,
Waveform Display, FFT's and Filter Design.

 

[Pooh Bear]

ChrisGibboGibson wrote:

Pooh Bear wrote:

[snip]

No European countries run on 230V to the best of my knowledge.


Legally, *all* European Union countries run on 230 volts.

Hilarious isn't it ?

No such actual voltage in the the largest Western market. Confuses the f**k out of
the Chinese who think it's really 230V and whose transformers will happily overheat
here.

The fact that, in practice, you will measure either 240 volts or 220 volts does
not seem to deter the pillocks in Brussels.

But there's a cop-out that tells the truth !

As you know - incandescent light bulbs are very sensitive to voltage wrt lifetime.

So in mainland Europe you still get 220 V lightbulbs and here in the UK we get 240V
bulbs. Check it for yourself if in doubt.


Graham

 

[Andrew Holme]

Frank Birbacher wrote:

For the comparator I thought of chip 74684, but maybe I
cannot get it.
Are there alternatives to 74684/685?

Just spotted 25 x SN74LS682N on ebay (UK) with no bids on them at the moment

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&category=36332&item=3851722229&rd=1

 

[Terry Given]

Paul Burridge wrote:

On Thu, 11 Nov 2004 04:55:08 GMT, Rich The Philosophizer
null@example.net> wrote:


Which one is that? Cannibalism/vampirism, or infant mutilation?


The latter. Hiding behind 'religious tradition' for what amounts to
patent bestiality just ain't acceptable.

Given the fact that it is clearly accepted, your statement is wrong.
Shouldnt be though

Whats really funny is the fuss made over somali immigrants and their
propensity for genital mutilation of girls - its OK for white people to
circumcise boys, but not for black people to circumcise girls - or maybe
its the lack of anaesthetic?

Cheers
Terry

 

[Fred Bloggs]

Bill Sloman wrote:

Right now, it certainly doesn't look as if Dubbya should have invaded
Irak if he didn't have enough troops available to guarantee security
after the invasion.

I know- it was put to the idiot in a pre-election interview, essentially
recapitulating that every reason originally given for war proved to be
false- but the brain-damaged idiot retreated into his "but Saddam was
bad and the world is a better place now that he's gone" crap- the
severely incapable riffraff is beyond analysis- it is a very dark day
for America. Bush is seriously mentally and physically disabled- he was
so catatonic during his acceptance speech that the Cheney *scum* had to
reach over to him like a small child to make him shake hands after the
introductory congratulations. We have a very serious problem here and
how people don't see it I'll never know.- Most of America must be half
dead is the only explanation- a nation of walking dead people without
purpose or reason- dull, stupid, ignorant, apathetic vermin.

 

[Paul Burridge]

On Sat, 13 Nov 2004 20:25:28 GMT, Rich The Philosophizer
<null@example.net> wrote:

My theory, of course, is that the flow of enzymes or hormones
or whatever caused by emotionsl movement can stimulate, or
maybe just catalyze, this synapse growth. I.e., emotional
release dramatically empowers the learning process.

Ah, but did you formulate your theory after smoking a doobie or two?
That might invalidate it. ;-}
--

"What is now proved was once only imagin'd." - William Blake, 1793.

 

[Winfield Hill]

Fred Bloggs wrote...

Eh- you have approximately doubled the required AH of the battery.

Indeed, but you'll have to agree it's a big efficiency improvement
over my 42V to 1.8V linear regulator / seat warmer.


--
Thanks,
- Win

 

[Rich The Philosophizer]

On Sat, 13 Nov 2004 13:24:44 -0700, Mark Fergerson wrote:

Oh, dear. The drugs are kicking in.

Piss-poor excuse. I'm stoned nearly blind right now on
good bud from Washington state. Spellcheckers are Good
Things. ;&gt

Oh, I just didn't want to try to continue to try to make
coherent arguments at the time. It's not an "excuse" It's
more like "Since I'm getting pretty buzzed, and know that
when I'm buzzed I don't make much sense, I'll refrain from
trying to make sense for the nonce.

Can I get back to you on this?

Take your time. Just be sure you believe your survival is
worth the effort, or you might not be around to do so.

Oh, heavens! My survival is so far from threatened - wait -
that's not what you said. "worth the effort?" Hm. Hmhm. Mmm,Hmhm.
Heh. Heheh. KH'm! KH'm! <stifle, snort, lose>
BWWAAAAHAHAHAHAhahahahahahahahaaaaaaaaa!

Mark L. Fergerson

;^j
Rich

 

[BFoelsch]

"sjcma" <ma@removethis.canada.com> wrote in message
news:E_6dnXTsXooJXAvcRVn-1Q@rogers.com...

Hi,

I'm hoping someone can enlighten me on the definition(s) of a Colpitts
oscillator. I've seen many circuits diagrams that show a Colpitts
oscillator, but they don't always look the same.

Assuming an NPN device, some show the capacitive feedback from collector
to emitter, some show the capacitor feedback from emitter to base, and
some show the tap between the 2 tank capacitors grounded. I've seen
circuits that are common base, common emitter, and common collector all
claming to be Colpitts.

What's the common link between all these circuits besides tapping the tank
in between two capacitors and connecting it somewhere (sometimes, even
ground!).

Nothing. The "tapped tank capacitance," as you call it , is the definition
of a Colpitts oscillator. If you take the same circuit, but tap the
inductor, you have a Hartley oscillator.

Both oscillators may be common emitter, base, or collector. Oscillators like
that are identified by the AC circuit, where the circuit happens to be
grounded or how the power is applied is irrelevant.

If someone feels like typing a lot, perhaps a quick explanation of the
advantages of each topology would be nice

Maybe in the morning, I'm pooped right now.

Thanks in advance.

sjcma

 

[Ken Smith]

In article <cn527702tob@drn.newsguy.com>,
Winfield Hill <hill_a@t_rowland-dotties-harvard-dot.s-edu> wrote:
[.....]

150A regulator. He delivers his kW power level for only a few
seconds, and during that time dissipates 150A * 5V at most (likely
less, due to battery and cabling voltage drops), which amounts to
about 450 * 3 watt-sec = 1350J during that time. Unlike ordinary
linear kW supplies, this won't present a serious heat sink problem.

The TIP35 and TIP36 transistors are fairly cheap. I think I'd start like
this:

10 each TIP35
------------------- ---/\/\---
! \ /e !
! ----- !
! TIP36 ! !
+-/\/\/-- -----------/\/\------+
! e \ / !
! ------ !
! ! --------- !
---+--/\/\/\/--+-----! LM317 !---------+----
---------
!

--

--
kensmith@rahul.net forging knowledge

 

[Rich The Philosophizer]

On Fri, 12 Nov 2004 13:23:45 -0600, John Fields wrote:

On Fri, 12 Nov 2004 18:28:47 GMT, Rich Grise <rich@example.net> wrote:

On Thu, 11 Nov 2004 09:20:10 -0600, John Fields wrote:

On Thu, 11 Nov 2004 09:27:05 GMT, Rich The Philosophizer
null@example.net> wrote:

On Thu, 11 Nov 2004 00:06:12 +0000, Steve Taylor wrote:

John Fields wrote:
---
It's still an example, and a good one.



...when your enemy's supply lines are 16 weeks long and you have French
help....

Or when you're defending your home from invaders.

---

RICH BUT GROUNDED

I am a gadwalk.
Small of brain but large with turd,
too heavy to fly

So, do you think, like, we haven't noticed?

---
Hmmm... Sorry, I guess allusion is lost on you.

maybe you'll get it if it's written like this:

RICH BUT GROUNDED

Rich is a gadwalk.
Small of brain but large with turd,
too heavy to fly

Well, your estimation of me certainly confirms what I have already
been able to discern about your capacity for rational thought.

Thanks,
Rich

 

[Rich The Philosophizer]

On Sat, 13 Nov 2004 12:32:54 +0000, ChrisGibboGibson wrote:

Scott acepilot@bloomer.net wrote:

He may not have any employees which reinforces OP's original argument that he
gets nothing from the supply company just like he gets nothing from the
employees which he doesn't have.

...it is doing WORK, so legally you
must pay the worker's wages for work performed.

But OP does just as much work by sending all the current back to the supply
company so they should pay him the same amount.

No, you've got it wrong here.

The power lines are a big belt. There's a pulley at the power company's
end, and a pulley at your end. Some guy turns the crank on the pulley
at the power Co, and that turns the pulley at your house, cranking
your fridge, so you don't have to crank it yourself.

_This_ is the guy you're paying.

Count the electrons into OP's house, and count the electrons out of OP's house.
I bet they're pretty close in quantity.

That's right - your car certainly doesn't use up the alternator belt!

Cheers!
Rich

 

[Rich Grise]

On Sat, 13 Nov 2004 21:23:13 -0500, sjcma wrote:

Hi,

I'm hoping someone can enlighten me on the definition(s) of a Colpitts
oscillator. I've seen many circuits diagrams that show a Colpitts
oscillator, but they don't always look the same.

Assuming an NPN device, some show the capacitive feedback from collector
to emitter, some show the capacitor feedback from emitter to base, and
some show the tap between the 2 tank capacitors grounded. I've seen
circuits that are common base, common emitter, and common collector all
claming to be Colpitts.

What's the common link between all these circuits besides tapping the
tank in between two capacitors and connecting it somewhere (sometimes,
even ground!).

As far as I know, there isn't. The way I learned it, the definition
of a Colpitts is a parallel resonant circuit with a tapped capacitor,
with signal ground at the junction of the caps, so the ends are 180
degrees out of phase, so it's a natural feedback path. Or something
like that. One end to the output and the other to the input, basically.
And the Hartley is the same thing with the coil and caps swapped. ;-)

The rest is window dressing.

If someone feels like typing a lot, perhaps a quick explanation of the
advantages of each topology would be nice

All I can say to this is, of course, "It depends."

But I'd bet credits to navy beans that a google search will turn up
reading material that can keep you occupied for awhile.

Cheers!
Rich

 

[Jonathan Kirwan]

On Sun, 14 Nov 2004 06:33:53 +0000, Guy Macon <http://www.guymacon.com> wrote:

This is a perfect match for a BasicX controller, and I think that
you can do it all yourself (possibly with a few questions posted
here) using that technology.

I'm a little worried about the 20mA @ >=5V (quiescent, without taking into
account any I/O requirements.) AAA's are rated for 20mA, but it would require 4
of them in order to meet the 5V minimum. At 20mA, the four AAA's would last
(down to 1.25V each) for about 40 hours according to the Eveready chart.

From the writing, my guess is that this is some kind of "engine hour" meter that
logs operational time to a resolution of 5 seconds. The unit would also turn on
the display long enough to read the accumulation (1 minute), but could go blank
after that. But that's hard to say from the way it is written out.

If my wild guess is close to it, I'd imagine that if and when the batteries need
to be replaced, it still needs to remember the accumulation. I'd also imagine
that it would be much better if this could be a set-and-forget kind of device,
where the batteries aren't being replaced every few days. This is why the LCD
and why the mention of "if it could be run for long periods of time on button
cells" comment. I'm not sure how to interpret "long periods," but I'm guessing
that once every few months or more would be good thing.

That BX-24 may be a bit too much of a pig. Olimex has a device with an LCD
built in that has enough digits to it (and other bells and whistles) and
includes the ability to operate the micro at around 2uA quiescent (no display,
but with a 32kHz timer running in sleep mode 3), can wake up to a full 8MHz in
less than 6us (usually 2us), and probably can operate the display with very low
power, as well:

http://www.olimex.com/dev/msp-449stk2.html

Uses two AAs, though. I haven't written them to ask about the power required,
but my past experience with the CPU would suggest that it could operate a very
long time on those two batteries.

But I think the spec needs a little more definition.

Jon

 

[Rich The Philosophizer]

On Sat, 13 Nov 2004 23:48:13 +0000, Fred Bloggs wrote:

Bill Sloman wrote:
John Fields <jfields@austininstruments.com> wrote in message news:<imacp09ug5gr716a2l4mcgnmdes5uu41jd@4ax.com>...

On Sat, 13 Nov 2004 14:22:29 GMT, Fred Bloggs <nospam@nospam.com
wrote:



John Fields wrote:

On 12 Nov 2004 17:15:56 -0800, jeffm_@email.com (JeffM) wrote:


snip

You may notice that slightly over half of the population of the US
voluntarily voted him back in, so I suppose y'all better start
building a BIG jail should he be found guilty.

It has been demonstrated time and time again that 75% of that "over
half" are ignorant uneducated garbage who didn't know their ass from a
hole in the ground on 90% of the major campaign issues.

---
OK, but disenfranchisement because of ignorance isn't going to happen
(again) anytime soon, I think.
---


Self-serving optimism.


It is a measure
of the effectiveness of the Rove $260M campaign machine. Therefore it is
not accurate to say anyone put Bush "back in"- as this would imply a
degree of cognizance that just wasn't there.

---
Cognizance of anything other than how to pull the lever (so to speak)
is immaterial, and even that doesn't matter since the president isn't
_really_ elected popularly.
---


Democracy is finished in
America- the more educated members of the electorate will no longer
tolerate the moron majority at the bottom.

---
Sounds to me like a case of the literati being more equal than the
illiterati.


As it should be. Do you want your diseases treated by someone who
lacks a medical eductation?


What do you suggest? A purge? Sterilization?
Euthanization of the offspring of parents with IQ's lower than _or_
higher than "x"? Euthanization of that portion of the population with
equally "unacceptable" IQ's?


Electoral expenditure rules with teeth, so that multi-millionaires
can't buy up TV time to push electoral misinformation into the brains
of the couch potatoes.

----------
Bill Sloman, Nijmegen

The biggest problem is that the complexity of government has outpaced
the capability of 99.999999% of the solaced populace. So what can be
done? They shouldn't have a say in government but then democracy
mandates they be allowed to vote. Education of even an insignificant
portion of them is hopeless. It looks like we may have reached some kind
of self-destruct limit.

Well, all of the prophecies that there are point right at exactly what
we are observing right before our very eyes, so what are the logical
conclusions?

There's even some guy that claims that there are carvings in The
Great Pyramids that predict The Big One, which seems to be in
process, or a reasonable enough facsimile thereof that a lot of
pundits are getting a lot of mileage out of it. ;-)

Also the Mayan or Aztec calendar, possibly Stonehenge, Easter
Island, and who can ignore the ever-popular Holy Bible?

I wonder what kind of conclusions you could come to if you made
a graph of various trends and stuff, like economies, wars,
weather, populations, just all sorts of cyclic-looking things,
and see if any kind of pattern would come out. I'm not motivated
on my own to go search out a pile of historical data and graph
it all, but I'd think that even as a thought experiment, a
whole lot of things seem to be coming to some kind of head.

What if that turns out to actually be an asymptote?

;^j
Rich