Maker Pro
Maker Pro

Isolated, regulated, toroidal step down transformer AC power supply design.

M

Mark

Can't do it NOW, Andy. I'll get around to it.

I am a little apprehensive about poking around inside live electrical
equipment. Sorry to disappoint you so.
 
B

Bob Parker

What a stupendously stupid proposition to make.

The topographic particulars of any individual post has NO IMPACT whatsoever
on the chronology or the EXTERNAL thread structure of any given subject of
conversation on Usenet, AFAIK.

If you have a reader that CAN thread conversations based on the internal
topographic details of the text of individual posts, then good for you, but
you can't expect others to adjust their habits for the peculiar capabilities
of your reader.


"To get attention, causing disruptions, *annoy people*, or general
chaos are almost always at the top of a troll's agenda."
 
M

Mark

Pfffft....

You make some of the most inane suggestions, dress them up as cognisant
arguments and then call ME the Troll!??

Bob, ANYONE can see through you.
 
M

Mark

What was wrong with either of these suggestions?

a) Buy another UPS (on Ebay for around $30) and then just step-down the
voltage using my pre-existing wall-wart transformer. If 240 VAC goes in,
something CLOSE to 9 VAC should come out and everything is happy, ..maybe.

b) A design involving transformation to a nominal VAC then rectification and
regulation to a nominal DC, filtering and decoupling, and then inversion
back to 9 VAC (+/- x%).

But then why bother to make it when you can buy option a) for $30 bucks.

But then again, maybe ONLY a Ferro-resonant UPS design will do it? Probably
not.

I did amend my specification to 2 amps (fused at input). The fact of the
matter is that I could have scaled up/down most designs that I was likely to
receive, except for the very small or the ridiculously large.

Now, where's my nomination? CLUELESS NEWBIE OF THE MONTH seems like a synch
to me and you only got two nominations. Phil will vote for me I swear and
you just can't get a better credentials than that. Bob will vote for me,
twice. Trev will, honest!
 
L

Lionel

On Mon, 2 Apr 2007 23:09:17 +1000, "Mark"

[Big snip of my helpful questions that the OP totally ignored]

Well, there's 3 minutes of my life I won't be seeing again...
Now, where's my nomination? CLUELESS NEWBIE OF THE MONTH seems like a synch
to me and you only got two nominations. Phil will vote for me I swear and
you just can't get a better credentials than that. Bob will vote for me,
twice. Trev will, honest!

(YANETUT)

YHGMTPO AE & AUK. YHL. LTBF,YPW.

HTH, HAND.
 
T

Trevor Wilson

Mark said:
Pfffft....

You make some of the most inane suggestions, dress them up as cognisant
arguments and then call ME the Troll!??

Bob, ANYONE can see through you.

**Oh yeah? See if you can find anyone who disagrees with Bob. Bob has you
nailed.

I'll wait.

While I do, go to one of the following newsgroups:

rec.audio.tech
sci.electronics.repair

Maybe they'll help you.
 
M

Mark

Anything else you wanted to tell me about your expectations?

"(You Are Not Expected To Understand This But)

You Have Greatly Misunderstood The Purpose Of Aus.Electronics and Alt Usenet
Kooks. You Have Lost. Learn to Be Funny, You Pathetic Wanker.

Hope This Helps, Have A Nice Day."

I won't bother to make pretensions of 'hip cyber-credibility', except to
say:

TAWSFI, HETLA DETLA YAFLAEIP.

TUTLA EFETLA EEETLA, SRFLA MTFLA ATHFL YAUA!

....and try to sound important whilst doing it.



Lionel said:
On Mon, 2 Apr 2007 23:09:17 +1000, "Mark"

[Big snip of my helpful questions that the OP totally ignored]

Well, there's 3 minutes of my life I won't be seeing again...
Now, where's my nomination? CLUELESS NEWBIE OF THE MONTH seems like a
synch
to me and you only got two nominations. Phil will vote for me I swear and
you just can't get a better credentials than that. Bob will vote for me,
twice. Trev will, honest!

(YANETUT)

YHGMTPO AE & AUK. YHL. LTBF,YPW.

HTH, HAND.

--
W "Some people are alive only because it is illegal to kill them."
. | ,. w ,
\|/ \|/ Perna condita delenda est
---^----^---------------------------------------------------------------
 
B

Bob Parker

Anything else you wanted to tell me about your expectations?

"(You Are Not Expected To Understand This But)

You Have Greatly Misunderstood The Purpose Of Aus.Electronics and Alt Usenet
Kooks. You Have Lost. Learn to Be Funny, You Pathetic Wanker.

Hope This Helps, Have A Nice Day."

I won't bother to make pretensions of 'hip cyber-credibility', except to
say:

TAWSFI, HETLA DETLA YAFLAEIP.

TUTLA EFETLA EEETLA, SRFLA MTFLA ATHFL YAUA!

...and try to sound important whilst doing it.

Get back under your bridge, troll.
 
M

Mark

Oh, OK. So why should I try to deny any allegation of success!

Yup, you got me: This is a successful Troll.

I've fooled you all, *except that wise-old-sage Bob* of course. He saw right
through me from the beginning.

Oh, and Phil of course, although I appear to have him turned around, I know
he'll come good. He should have trusted his instincts and never budged an
inch.

Oh, and you of course. Bob has set you strait.

Yup, you got me so nailed I can't scratch my arse for trying.
 
S

swanny

Bob said:
I was drinking some coffee while I read that, and I *almost* sprayed
the monitor when I started laughing!
Very well done Andy - thanks. :)

Bob
Damn! And here I am substituting all those caps with resistors instead!
Especially the big caps, with such a small ESR that they can be replaced simply
with a wire link ...
 
B

Bob Parker

swanny said:
Damn! And here I am substituting all those caps with resistors instead!
Especially the big caps, with such a small ESR that they can be replaced simply
with a wire link ...

Make sure it's silver wire for good acoustic transparency! ;-)
 
M

Mark

I don't think it could be rightly described as a "charge pump" device at
all.

Apparently (because I had to look it up) Charge Pump devices work by
electronically switching the polarity of the capacitors. IE "the capacitor
is disconnected from the original charging voltage and reconnected with its
negative terminal to the original positive charging voltage".

That doesn't happen at all within my application.

I think that the schematic I am looking at is rightly described as a voltage
multiplier.

I.E. it is an "electrical circuit that converts AC electrical power from a
lower voltage to a higher DC voltage by means of capacitors and diodes
combined into a network."

In particular it is a half-wave series multiplier, where the voltage is only
doubled once.

However, voltage multipliers "can be used to generate bias voltages of a few
volts or tens of volts or MILLIONS OF VOLTS"

You said:

" Mark Ilsley = UTTER FUCKING LIAR

Yes, it is a pair of half-wave rectifiers which DOUBLE the voltage. 9 VAC
in and +/-15 VDC out AFTER regulation.


** Totally impossible bollocks !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

9 volts AC = 12 volts DC *peak* after rectification and filtering."

There is no escape. "Totally impossible" has only ONE meaning.

But I do so love watching you squirm on the end of my hook.

Desperately wracking your brain for an escape, an excuse, an explaination.
ANYTHING to save face. It's fun to observe you in this mode.
 
M

Mark

Wrong. The laws of physics do apply in OUR world and it certainly is
possible under those laws.

I believe (because I am no expert) that the design I am looking at is
rightly described as a Voltage Multiplier. (read below)

In any case, I wouldn't be quite so adamant about it, if I were you.

Abyway, whilst you are here, why don't we talk about US laws that aren't
applied in Cuba.
 
M

Mark

What utter piffle.

I won't be bullied into suppling requests for information. It would be an
act of submission to do so and a reward for the bullies.

I will respond to any polite request for more information with the
information requested, provided it is within the terms of the original
question. I do not feel obliged to answer any questions pertaining to
matters outside those terms or conditions, however I am still FREE to answer
them, if I wish.

Bob ASKED me what I did for a job (and quite politely as I remember it) and
I gave him a very short reply. My family commitments are relevant (to the
question of why I have not been able to peruse a number of other possible
avenues of investigation).

Their have been other reasons given. Caution, inexperience and a lack of
equipment being some of them. You must also consider remote location. I
can't just duck around the corner and pick up whatever I may need.

I had a look under the 'bonnet' last night and the regulator ICs are lying
flat on the PCB closely surrounded by many capacitors. The risk of shorting
the pins with the DMM probes is perilous. I need to pick up a set of mini
alligator clips to do the measurements safely. Attaching them when the power
is OFF. At the moment that means waiting until after the Easter break.

I really expect no further help from you, Poxy. And I am untroubled by my
position.
 
M

Mark

Yeah, right. Or to paraphrase your own comments:

"Hey, just because we behaved like arrogant cunts, don't expect any better
treatment elsewhere"

which is roughly to say: "Usenet is our life, and we can follow you
anywhere"
 
B

Bob Parker

But I do so love watching you squirm on the end of my hook.

Desperately wracking your brain for an escape, an excuse, an explaination.
ANYTHING to save face. It's fun to observe you in this mode.

Go and irritate the hell out of some other newsgroup will you, troll?
It's bad enough having all the 'net kooks' crossposting their stuff
into aus.electronics without you making it even worse.
 
B

Bob Parker

Yeah, right. Or to paraphrase your own comments:

"Hey, just because we behaved like arrogant cunts, don't expect any better
treatment elsewhere"

which is roughly to say: "Usenet is our life, and we can follow you
anywhere"

Go and annoy some other group with your babble, troll. We're tired
of you being here.
 
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