Driver to drive?

[Brian]

"Hassan" <hasan5012@yahoo.com> wrote in message
news:26acb996.0410190344.57beb64a@posting.google.com...

Hello;
The real application is:
30 < Vin < 9 and Vo= 15 V @ 7A
As you see, it is both a step up and step down converter.
Would you please show me how to design it with MC34063A?
Thank you in advance.
Hassan

I have added two additional schematics at the site I sent you to before
http://www.fncwired.com/StepDnEx/
It has a step-up and a step-up/step-down schematic added. The program I am
using is "FNC-Elcad". You can see more about it, where the schematics are
(just click on "Home" or "Program Guide" while you are there). Hope this
helps. If you have anymore questions, please feel free to ask.
Brian

 

[John Popelish]

KM wrote:

John Popelish wrote:
KM wrote:
I have use a LC3803 Linear regurator to design a flyback regurator. A
tronsformer is wind with single primary and double secondary coil (one
for 3volts and one 7volts) the FB was return from 3 volt output. It is
found that the output of 7 volts when unloaded is floating high to 13v
when only 3volts output are loaded. It is found that the overshoot is
causing the raise. What is the possible solution to this?

Are the 3 and 7 volt outputs both positive?
Do the 3 and 7 volt outputs share a common return?
What are the rated full load currents for each output?

both are positive
No, there are individual return seperately

That rules out sharing currents in the 3 volt winding.

the rated full load are 2.2A for 3 Volts and 1.2 A for 7volts respectively.

I think I would try winding part of the 7 volt winding bifilar with
the 3 volt winding and putting the rest on top of that. And you will
probably need to add some minimum load to the 7 volt output so that it
is never completely unloaded.

--
John Popelish

 

[Nicholas O. Lindan]

"Phil Hobbs" <pcdhSpamMeSenseless@us.ibm.com> wrote

If you guys are going to use a private language, in which "Gaussian" means
something other than "having a Gaussian amplitude distribution, go ahead.

That's funny. I thought that was what _you_ were saying: the
amplitude has a Gaussian distribution. As in your statement:

"Gaussian" means that samples of the instantaneous noise signal form a random
process whose probability density is Gaussian--i.e. that a histogram of the
amplitude has a round top and wings that die off rapidly but that have no
sharp cutoff.

Because that's what "us guys" are also saying.

* * *

Customer: I'd like to purchase an argument.

Store clerk: That will be five pounds, sir.

Customer: Very well, here you are.

Clerk: Thank you very much.

Customer: I would like to argue that ...

Clerk: First you will have to pay me five pounds.

Customer: I just did.

Clerk: No you didn't.

Customer: I did.

Clerk: Didn't.

Customer: Did.

Clerk: Didn't.

Customer: This isn't an argument.

Clerk: Yes it is.

Customer: Isn't.

Clerk: Is.

.... ad nauseum, ad infinitum ...

--
Nicholas O. Lindan, Cleveland, Ohio
Consulting Engineer: Electronics; Informatics; Photonics.
Remove spaces etc. to reply: n o lindan at net com dot com

 

[John Larkin]

On Sun, 17 Oct 2004 10:18:30 GMT, Rich Grise <rich@example.net> wrote:

On Sat, 16 Oct 2004 04:18:05 -0700, robin.pain@tesco.net wrote:

John Larkin <jjlarkin@highlandSNIPtechTHISnologyPLEASE.com> wrote in message news:<t1qvm095fevnt365vuc4m6inlie9jbreuh@4ax.com>...

Caps lock is indispensable, as real programmers code in uppercase.

John

UPPER CASE verses lower case:-
If you want to provide the maximum meaning for the minimum effort ya
gotta have as much variety as possible. The same thing applies to
prose as well as code so lower case is not a stylistic thing, it is a
better thing:-
...
Which example is easier for the brain to decode and contains more
information in less text?

That's irrelevant. He learned to program back when keypunches only had
UPPER CASE, and his brain ossified that way.

Thanks,
Rich

No, I started with paper tape, and only used punchcards later, when
affordable fast card readers became available; had to design my own
interfaces, and patch the assemblers and interpreters to read cards.
I've programmed a million lines or two in uppercase, about another
four thousand in the last few weeks, and it all just works. If
"ossified" means that programming embedded systems is fast, easy,
routine, and bug-free, I suppose I am that.

Embedded code should be a utility, a dependable if minor component of
a product. But if you do a bad enough job in a modern OO language, you
can make it look hard and get a lot of attention, and make a career of
it.

John

 

[John Larkin]

On Sun, 17 Oct 2004 14:54:19 +0100, Paul Burridge
<pb@notthisbit.osiris1.co.uk> wrote:

On Sat, 16 Oct 2004 18:43:25 -0700, John Larkin
jjlarkin@highlandSNIPtechTHISnologyPLEASE.com> wrote:

On Sun, 17 Oct 2004 02:17:44 +0100, Paul Burridge
pb@notthisbit.osiris1.co.uk> wrote:

On Sat, 16 Oct 2004 21:49:57 GMT, Fred Bloggs <nospam@nospam.com
wrote:

The backfire is one awesome machine- the B-52 is a hot air balloon by
comparison.

Indeed?? I find it hard to believe that the Ruskies have trumped the
Yanks on their own turf. :-|

The B-52 is now mostly a cruise missile truck.

Maybe. But it's a darned good lookin' one. I can't think of anything
else I'd sooner be bombed by. BTW, what was the model desgination of
Enola Gay?

That was a B-29.

My favorite plane was the Spitfire. I have a book full of specs and
mechanical drawings that I found in a ratty little bookstore in
Oxford.

John

 

[Clarence]

"Keith Williams" <krw@att.bizzzz> wrote in message
news:MPG.1bdee1c373bbb9b8989754@news.individual.net...

--
Keith

Had nothing of value to contribute!

 

[Frank Bemelman]

"Tony Williams" <tonyw@ledelec.demon.co.uk> schreef in bericht
news:4d0031e1ebtonyw@ledelec.demon.co.uk...

In article <41744695$0$65124$e4fe514c@news.xs4all.nl>,
Frank Bemelman <f.bemelmanx@xs4all.invalid.nl> wrote:
Okay, the request is a circuit that pulses an opto coupler,
briefly and just once. It should do so, everytime it is powered
up. Power is 9V.

CMOS 555 and output transistor Frank?

Power up ON-time is the RC charge from 0V to 2/3 Vcc,
(1.1RC), and have the same value discharge resistor
so that the cap is discharged to only 1/2 Vcc.

I was afraid someone would suggest that. Thank heavens it
is not very important. For some silly reason, I don't like
555's. There no explanation, alas. A 40106 like Joerg
suggested feels better. Or maybe I try something with a
single comparator or perhaps an opamp.

Thanks anyway

--
Thanks, Frank.
(remove 'x' and 'invalid' when replying by email)

 

[Frank Bemelman]

"John Larkin" <jjlarkin@highlandSNIPtechTHISnologyPLEASE.com> schreef in
bericht news:4mf5n0psrsb9chs9qafne7cme7fsr0uerh@4ax.com...

On Sun, 17 Oct 2004 19:58:30 +0200, "Frank Bemelman"
f.bemelmanx@xs4all.invalid.nl> wrote:

"John Larkin" <jjlarkin@highlandSNIPtechTHISnologyPLEASE.com> schreef in
bericht news:l9c5n0l1ao18ae898l8j3qlqf15l5bp7o5@4ax.com...
On Sun, 17 Oct 2004 12:08:00 +0200, "Frank Bemelman"
f.bemelmanx@xs4all.invalid.nl> wrote:


Do you believe the US is a better place now, compared to the
situation
before the invasion?

Somewhat, but that's not a causality.

I'm surprised you say that.


You are surprised that I try to think about what's actually happening,
and what the results may be, as opposed to ranting emotionally.

Burry your emotions John, if that makes you feel better.


Indulge your emotions Frank, if that helps avoid thinking.

Well, let me say that I am not impressed by the results of
your thinking sofar.


--
Thanks, Frank.
(remove 'x' and 'invalid' when replying by email)

 

[Fred Bloggs]

Tom Seim wrote:

Fred Bloggs <nospam@nospam.com> wrote in message news:<4171C2DB.8050104@nospam.com>...

Tom Seim wrote:
Teresa Heinz (no Kerry in the name) released PART of her 2003 tax
return. Paid an effective rate of 12% on 5 mil income. How did she
skate on the top income tax rate? That tried and true tax dodge:
tax-free municipals.

You call tax free municipal bonds skating and a tax dodge? That has been
a legitimate
investment for time immemorial


ALL of the tax code loop holes are legitiment by definition - they are
passed by Congress.

How dumb are you? It is in the public interest that these bonds be tax
free. period.

to give the government an advantage in

attracting the most investors at the lowest rate- a rate of return paid
for by the taxes of the locality BTW. The *factual* reports are that THK
has distributed her investments approximately 50:50 this way-
approximately 2.8M$ tax free income from them.


Well, Kerry will put a stop to that, you say!

Why would he, idiot?

Well, NO HE WON'T!! If
he did, besides raising his own taxes, he would raise the bond
interest costs paid by munis (that's you & me, if you don't know what
a muni is) by 70%. Which will mean higher local and state taxes to
pay the higher interest cost.

That is the most nonsensical you have barfed so far! Do you talk with a
lisp and other form of speech impediment too?

Where the hell are you getting that? Tax free municipal will stay tax
free, it is only the dividends and capital gains on non-tax free
investments that will be taxed for the higher income people. Kerry has
no proposals concerning changing any bond rates, idiot.


Can you spell "ad hominem"? Do you know what that means? Obviously
not.

It is not ad hominem to address you by your rightfully deserved title.

OK, what makes one tax dodge pc and another a shameless corporate
scam? Political spin, of course.

Almost everything you say is so incredibly ignorant. Investing in tax
free municipal bonds is not a tax dodge.


Of course it is. People invest in munis to avoid paying taxes on
interest. That is the ONLY reason they buy the munis.

Let me see if I have this straight. Those bonds are issued to pay for
public works with tax free interest to induce investors, and you call
those investors tax dodgers when they participate? That is not correct
and you know it! A true tax dodge is using some loophole *unanticipated*
by Congress to avoid paying tax. I was under the impression that this
tax stuff might be something you understood- but I see now you're
another one who is "dumb as shit"-or is this another of your
pseudo-discussions which is really about getting the Rove slurs in
print. Your boy there is going to jail- I don't think he will last out
his sentence.

Those bonds were issued to pay

for a public works project, it is in the interest of the citizens of the
locality to borrow money at the lowest rate, and a tax free bond will
attract by making their lower tax free interest rate competitive. This
is not political spin- it is common sense.


The spin part is demonizing one tax preference while you PERSONALLY
benefit from another.

You say closing the *unanticipated* loopholes with phony offshore
subsidiaries and overseas abuse is "demonizing"? You are one sick
un-American piece of trash!

Geez- I wonder if Arlington,

Texas issued a bond to put that $135 Million investment in Bush's new
Ranger stadium? Duh ya' think? That deal there is about the single
greatest source of his existing wealth.


That's still ok, you say. Nobody making less than $200k is going to
have their taxes raised. Wrong again, bucko. First, the Bush tax cuts
are due to expire. Expiring with them are the middle income tax
cuts, 10% lower income tax bracket and $2,000 child credit.

Those baseline tax cuts have been extended to "sunset" in the year 2010-
they are safe and Kerry has pledged to maintain them. You're not even up
on the latest news.


Oh yes I am. Without legislative action taxes WILL increase
dramatically in 2010. Republicans will hold Kerry's feet to the fire
on this issue, making a deadlock highly probable:

Although the House strongly opposed it, Title IX of the Economic
Growth and Tax Relief Reconciliation Act of 2001 provides that the Act
shall not apply after December 31, 2010. The Senate added this
provision at the last minute to avoid a minority challenge to the
bill.

Title IX will result in a multi-billion dollar automatic tax increase
on January 1, 2011. The top income tax rate will rise from 35%
per-cent to 39.6% while the lowest rate will shoot up 50%. The child
credit will drop from $1,000 to $500, the annual contribution limit on
IRAs will drop from $ 5,000 to $ 2,000, and the marriage penalty and
death tax will reappear in toto.

Right- there is nothing in Kerry's plan to increase taxes for income
under $200K.

How many of you know what the AMT (Alternative Minimum Tax) is? Many
of you are going to find out. This tax can hit people making as
little as $75k-not exactly your typical filthy rich bastard. By 2010
virtually everybody amking over $90k will be paying AMT instead of
the "regular" income tax. One group that got hit very hard in the
last few years were those who got stock options that turned out to be
worthless; except to the IRS where they are used in the AMT
calculation. And they AMT deduction is going back to its original
pre-Bush level abscent Congressional action. This is a $13k drop,
which is taxed at 26%, or about a $3,300 TAX INCREASE!

It looks like the AMT issue has been neglected by Congress period- at
this time it is not statistically significant. But it will be soon by
all economic projections. So this is a problem for both Republicans and
Democrats.



It's a problem for anyone caught in its trap. By 2010 the GAO
estimates that 17% of tax payers will fall into its jaws. It was
addressed by Bush's tax cuts: the AMT deduction was raised by $13k and
the income by $25k. These will revert back to previous levels in 2010.

The point of the AMT is that it trumps the income tax. This means that
an INCOME TAX CUT is rendered NULL AND VOID by the AMT. This, in turn,
means that those paying the AMT are not benefiting from the tax cut
and will not generate any new tax revenue for Kerry if he raises
taxes.

This problem will be dealt with at the proper time. It is a bipartisan
concern.

You are beyond pathetic- how damned dumb are you parasite space-fillers
at PNNL anyway?


Can you spell "ad hominem"? Do you know what that means?

Yes- it means "let's drop the act and call a spade a spade."

 

[Clarence]

"John Fields" <jfields@austininstruments.com> wrote in message
news:u6i5n01gj2tli9deibev6hgjpv6djt3vj4@4ax.com...

On Sun, 17 Oct 2004 18:08:02 GMT, "Clarence" <no@No.com> wrote:

Moral, NOT religious! NOTE the difference, it is important!

Where do you think the concept of morality comes from, dumbass?

Watch you language John. Your immaturity is showing.

Morals are derived from logical philosophical thought. They had always been
arrived at in this manner. Religion is only a method of imposing them on to a
poorly educated and / or week minded mass of people.

Surly you do not think God said it is so, therefore if you do not comply HE/
She will strike you down? GMAB!

 

[Clarence]

"Rich Grise" <rich@example.net> wrote in message
newsan.2004.10.17.20.56.19.372099@example.net...

On Sun, 17 Oct 2004 18:58:15 +0000, Clarence wrote:

"Spehro Pefhany" <speffSNIP@interlogDOTyou.knowwhat> wrote in message
news:ghd5n0t62rnttuiv1jr65j6o2rovmvulg7@4ax.com...
On 17 Oct 2004 16:40:26 GMT, the renowned Jim Yanik
jyanik@abuse.gov.> wrote:

Except that the people the US is killing mostly deserve it.
They actually go looking for it.
Those Iraqis with RPGs are not your average Iraqi citizen.

Mostly young male weapon-owning patriots with some military
experience. Probably a lot like a younger version of you.

The place will be better off with them removed.

So, you've appointed yourself judge and jury, and are conveniently
letting the US military do the executions.

No, we were invited by Saddam. He signed a treaty and thought to end the war
with a lie. It didn't stick when he broke the rules.

Or have you appointed yourself God?

We are all God in our own minds.
Appointment not required.
You are where I recognized that trait!

Can't get a free country with a bunch of thugs trying to take over.

You're talking about being better off with the US military removed,
right?

No and you know it. Why argue with reality?

I do not want to disagree with you Rich.
Even though we do not share some opinions.

 

[John Fields]

On Sun, 17 Oct 2004 20:23:57 GMT, "Clarence" <no@No.com> wrote:

"John Fields" <jfields@austininstruments.com> wrote in message
news:knh5n0h3p14hufumlrqb0fna75s96om4ke@4ax.com...
On Sun, 17 Oct 2004 18:03:01 GMT, "Clarence" <no@No.com> wrote:

No, but if he was murdering innocent people and I told him to stop and he
continued, I might empty my S&W into him!
---
And you're fit to be judge, jury, and executioner???
Guess again.
---
Since you are too dense to understand. Why do you continue to draw
attention
to yourself?
---
John Fields

BTDT, No charges filed. If you are defending the innocent, your not committing
a crime. Not a Guess....

---
Damn, but you're a dumb shit. Stupid too...

You can't think or use the written language properly, and yet you
presume to have the capacity for unilaterally determining innocence
and guilt and meting out appropriate 'punishment' for what you
consider to be transgressions against your sensibilities?

Better you should turn that S&W on yourself...

--
John Fields

 

[Terry Given]

Ken Smith wrote:

In article <10n99pqfppovse2@corp.supernews.com>,
Andrey <a8421@intergate.bc.ca> wrote:
[...]

also within the extends of the metal mast. I believe I am safe. If lightning
strikes, it's pass of least resistance will be the mast.


The mast will ring at some frequency. For a short time there will be a
zillion watts of RF coupling into the cable.

Not only that, but go study up on the effects of lightning strikes. The
fast risetime large amplitude currents flowing thru the "lightning rod"
can and do induce huge fault currents in nearby conductors.

speaking of which, John Tobias published an interesting paper on
lightning protection systems in the july/august 2004 IEEE trans.
industry applications.

Cheers
Terry

 

[Paul Burridge]

On Tue, 19 Oct 2004 16:38:41 GMT, "Clarence" <no@No.com> wrote:

"John Larkin" <jjlarkin@highlandSNIPtechTHISnologyPLEASE.com> wrote in message
news:3ecan0510ca92ra2mtf0fkk2q1d3cj5jb4@4ax.com...
On Tue, 19 Oct 2004 14:16:47 +0100, "Ian Buckner"
Ian_Buckner@agilent.com> wrote:


There is a Spitfire mounted on a stand outside Edinburgh Airport.
We also get a number of interesting planes each year for the show
at East Fortune airfield (they have one of the Concordes there now).
I have an enlargement of a press photo of a flypast some years ago
over Edinburgh with a Concorde escorted by a flight of Spitfires.
Regards - Ian

"a Concorde escorted by a flight of Spitfires"

Wow, what a concept; wish I'd been there. And the Spits are still
flying, but the Concorde isn't.
John



More fuel efficient?

And quieter!

--

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

 

[Rich Grise]

On Tue, 19 Oct 2004 09:33:48 -0400, Keith Williams wrote:

In article <pan.2004.10.16.20.39.46.809822@example.net>,
rich@example.net says...
On Sat, 16 Oct 2004 17:24:50 +0000, Clarence wrote:

Oh, aren't those the one's who take all the credit for your work?
^

Well, I'll take credit for charging you two demerits for improper
use of the apostrophe, in this and another post. There is no apostrophe
in the plural "ones".

Ok, what about:

"Oh, aren't those the ones who take all the credit for one's work?"

Perfect.

Consider your fine paid in full.


Rich

 

[Winfield Hill]

Watson A.Name - \"Watt Sun, the Dark Remover\" wrote...

Winfield Hill wrote ...

I'm looking for an RF amplifier module that can deliver
2 to 3 watts into 50 ohms, over a 20 to 80MHz (or 120
or 150MHz...) range. Variable gain isn't required, but
would be a plus. My budget price is $100 but higher
is OK. I'll get 5 pieces to start, more if necessary.

Hey, Win! Ten-four, good buddy! Are you going into the
CB biz? (just kidding.)

Nah. This is just the right range for driving EOs
(Electro-Optic Modulators).

Run off 12VDC, or 28VDC?

Any voltage is OK, although driving for 50 ohms wideband
one needs at least 14V peak swing, so a 24 to 28V supply
is usual. If I could get the right RF output transistor
(60V, 10W, not too much capacitance), I'd roll my own!

The guys on alt.radio.pirate deal with these kinds of
things and the dealers who sell them. You might check
there.

OK, I'll ask.


--
Thanks,
- Win

(email: use hill_at_rowland-dotties-org for now)

 

[Rich Grise]

On Tue, 19 Oct 2004 08:37:13 +0000, John S. Dyson wrote:

In article <pan.2004.10.19.07.24.24.792050@example.net>,
Rich Grise <rich@example.net> writes:
On Mon, 18 Oct 2004 20:44:58 -0700, Tom Seim wrote:


Was "read my lips" [Bush I] or was it "read my hips" [Clintoon]?

So, since there is no possible rational justification for reelecting the
mass murderer evangelist, you hope to finesse votes by Clinton-bashing?

Actually, Carter wasn't really as much a mass murderer as incompetent
as president. Re-electing him would have no justification. Otherwise,
there has been no 'religious' freak as president in recent years. (Of course,
there are those, like Bush, who aren't shy about their religion, but also
who don't advocate other people having the same religion as him.)

I'd say murdering people who aren't the same religion as he is, _becuase_
they're not the same religion he is, makes a damned strong statement about
that.

Thanks,
Rich

 

[Rich Grise]

On Tue, 19 Oct 2004 08:37:13 +0000, John S. Dyson wrote:

In article <pan.2004.10.19.07.24.24.792050@example.net>,
Rich Grise <rich@example.net> writes:
On Mon, 18 Oct 2004 20:44:58 -0700, Tom Seim wrote:


Was "read my lips" [Bush I] or was it "read my hips" [Clintoon]?

So, since there is no possible rational justification for reelecting the
mass murderer evangelist, you hope to finesse votes by Clinton-bashing?

Actually, Carter wasn't really as much a mass murderer as incompetent
as president. Re-electing him would have no justification. Otherwise,
there has been no 'religious' freak as president in recent years. (Of course,
there are those, like Bush, who aren't shy about their religion, but also
who don't advocate other people having the same religion as him.) If
anything, there is apparently a movement to REPRESS Bush by condemning him
almost whenever he mentions his faith. (When someone mentions that they
pray for guidance, that shouldn't be deemed as being an imposition on you --
unless you are overly sensitive.) The biggest 'evangelist' group here
in the US appears to be those who are 'evangelizing' against religion.

What do you propose here? Turn the whold fucking country into the Church
of George the Blessed?

Will you be sending Homeland Security around door-to-door on Sundays, to
make sure everybody's attending services, like good little sheepies?

No, thank you - that's expressly forbidden by the Constitution, but
everybody seems to have conveniently forgotten that little fact.

Thanks,
Rich

 

[Mike Page]

Hassan wrote:

Hello;
I want to design a switching power supply with:
Vin=24 Vdc and Vo=15V @ 7A

I suggest you start with a 24V -> 12V switcher (available at 10A for
vehicular use) and "adjust" it.

Best regards,
Mike.

--
Mike Page BEng(Hons) MIEE www.eclectic-web.co.uk
Quiet! Tony's battling the forces of conservatism, whoever we are.

 

[Brian]

"Mike Page" <mike@SCRUBeclectic-CAPSweb.BLAMEco.SWENuk> wrote in message
news:WN2dnTVmLuuN7-jcRVnyjg@eclipse.net.uk...

Hassan wrote:
Hello;
I want to design a switching power supply with:
Vin=24 Vdc and Vo=15V @ 7A

I suggest you start with a 24V -> 12V switcher (available at 10A for
vehicular use) and "adjust" it.

Best regards,
Mike.

--
Mike Page BEng(Hons) MIEE www.eclectic-web.co.uk
Quiet! Tony's battling the forces of conservatism, whoever we are.

Hi Mike,
Is that 10A peak or 10A continous? If that's 10A continous, do you have a
part number?
Best regards,
Brian