audio recording on IC -help wanted

[Ron(UK)]

Lostgallifreyan wrote:

Franc Zabkar <fzabkar@iinternode.on.net> wrote in
news:7d7cq3hh7ln465u5dg5p9jpgj31k09u0lf@4ax.com:

BTW, does anyone know what is meant by "POOT SIZE" and "POOT IEGTH".



Poot length? Mine tend to be of the order of 400 milliseconds.

You should eat more roughage

 

[Lostgallifreyan]

"Michael A. Terrell" <mike.terrell@earthlink.net> wrote in
news:47A6C59D.78CC76B2@earthlink.net:

Lostgallifreyan wrote:

Franc Zabkar <fzabkar@iinternode.on.net> wrote in
news:7d7cq3hh7ln465u5dg5p9jpgj31k09u0lf@4ax.com:

BTW, does anyone know what is meant by "POOT SIZE" and "POOT IEGTH".



Poot length? Mine tend to be of the order of 400 milliseconds.


Unless someone lights one.

This would affect the spatial dimensions, not the temporal.

 

[Lostgallifreyan]

"Ron(UK)" <ron@lunevalleyaudio.com> wrote in news:-
MudnQ8_gr7zmTraRVnyiAA@bt.com:

Lostgallifreyan wrote:
Franc Zabkar <fzabkar@iinternode.on.net> wrote in
news:7d7cq3hh7ln465u5dg5p9jpgj31k09u0lf@4ax.com:

BTW, does anyone know what is meant by "POOT SIZE" and "POOT IEGTH".



Poot length? Mine tend to be of the order of 400 milliseconds.

You should eat more roughage

That is probably why I should NOT eat more roughage...

 

[Michael A. Terrell]

Lostgallifreyan wrote:

"Michael A. Terrell" <mike.terrell@earthlink.net> wrote in
news:47A6C59D.78CC76B2@earthlink.net:

Lostgallifreyan wrote:

Franc Zabkar <fzabkar@iinternode.on.net> wrote in
news:7d7cq3hh7ln465u5dg5p9jpgj31k09u0lf@4ax.com:

BTW, does anyone know what is meant by "POOT SIZE" and "POOT IEGTH".



Poot length? Mine tend to be of the order of 400 milliseconds.


Unless someone lights one.



This would affect the spatial dimensions, not the temporal.

It would also call for clean underwear. ;-)


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

 

[Lostgallifreyan]

"Michael A. Terrell" <mike.terrell@earthlink.net> wrote in
news:47A7AFB1.F0678ECD@earthlink.net:

Lostgallifreyan wrote:

"Michael A. Terrell" <mike.terrell@earthlink.net> wrote in
news:47A6C59D.78CC76B2@earthlink.net:

Lostgallifreyan wrote:

Franc Zabkar <fzabkar@iinternode.on.net> wrote in
news:7d7cq3hh7ln465u5dg5p9jpgj31k09u0lf@4ax.com:

BTW, does anyone know what is meant by "POOT SIZE" and "POOT IEGTH".



Poot length? Mine tend to be of the order of 400 milliseconds.


Unless someone lights one.



This would affect the spatial dimensions, not the temporal.


It would also call for clean underwear. ;-)

Indeed it would. And lets not get into the poot size stats.

 

[Lostgallifreyan]

"Mark Licetti" <MetalBladeSPAMNOMORE@SPAMNOMOREprodigy.net> wrote in
news:qEEsj.8325$0o7.6748@newssvr13.news.prodigy.net:

SPAMNOMORE

I say this the way Greg House says GETAWAY.

 

Mark Licetti wrote:

Email to MetalBlade@prodigy.net, if using "email reply" in Newsgroups edit
address manually to delete two strings: "SPAMNOMORE" repeated twice.

You misspelled it in the headers. I fixed it in these.

 

[Sjouke Burry]

michael nikolaou wrote:

Hi

I have a 12 v relay driving an large 220 volt AC relay . Across the contact
of the driver relay i placed one RC snubber circut (27NF with 100 R
resisitor in series) to help with some spikes that were influencing the low
voltage driver circuits.
The driver circuit is able to detect mains zero crossing and fire the
driver relay at an angle i choose .
From what i read the best point to switch off the power relay is at zero
crossing . I did that and i show a large spike up to 1 KV at the relay
contact followed by a decaying 500hz waveform to 0 volts . After some
experimentation the best point came exactly when switching off at the peak
of the mains voltage .At this point there is smooth decaying waveform to 0
volt after 5 periods of 500 HZ but no overshoot. The relay presents no
arcing. If i remove the snubber and make the experiment the best place to
switch is zero crossing but i also see large SHARP spikes up to 500 Volts
Peak.
My question is
The switching with snubber must be made at zero crossing or at the peak of
an ac voltage waveform ?
What is the behaviour of the circuit ?.
As i understand any large spikes can harm the X2 capacitor i'm using so
what is the best operating practise ?.

Any help will be appreciated

Michael


Dont switch off at zero voltage, but at zero current.

So monitor across a small sense resistor, and wait for
zero across that.

 

[michael nikolaou]

can you be more specific about the sense resistor . My circuit creates 500
micosecond pulse at every 50 hz zero voltage crossing.
At this pulse edge i activate relay considering turn-off / off delay to
calculate the peak voltage so 0 current for my inductive load .
Do you have something different in mind?
"Sjouke Burry" <burrynulnulfour@ppllaanneett.nnlll> wrote in message
news:47c44d7e$0$25500$ba620dc5@text.nova.planet.nl...

michael nikolaou wrote:
Hi

I have a 12 v relay driving an large 220 volt AC relay . Across the
contact of the driver relay i placed one RC snubber circut (27NF with 100
R resisitor in series) to help with some spikes that were influencing the
low voltage driver circuits.
The driver circuit is able to detect mains zero crossing and fire the
driver relay at an angle i choose .
From what i read the best point to switch off the power relay is at zero
crossing . I did that and i show a large spike up to 1 KV at the relay
contact followed by a decaying 500hz waveform to 0 volts . After some
experimentation the best point came exactly when switching off at the
peak of the mains voltage .At this point there is smooth decaying
waveform to 0 volt after 5 periods of 500 HZ but no overshoot. The
relay presents no arcing. If i remove the snubber and make the
experiment the best place to switch is zero crossing but i also see large
SHARP spikes up to 500 Volts Peak.
My question is
The switching with snubber must be made at zero crossing or at the peak
of an ac voltage waveform ?
What is the behaviour of the circuit ?.
As i understand any large spikes can harm the X2 capacitor i'm using so
what is the best operating practise ?.

Any help will be appreciated

Michael


Dont switch off at zero voltage, but at zero current.
So monitor across a small sense resistor, and wait for
zero across that.

 

[Sjouke Burry]

michael nikolaou wrote:

can you be more specific about the sense resistor . My circuit creates 500
micosecond pulse at every 50 hz zero voltage crossing.
At this pulse edge i activate relay considering turn-off / off delay to
calculate the peak voltage so 0 current for my inductive load .
Do you have something different in mind?
"Sjouke Burry" <burrynulnulfour@ppllaanneett.nnlll> wrote in message
news:47c44d7e$0$25500$ba620dc5@text.nova.planet.nl...
michael nikolaou wrote:
Hi

I have a 12 v relay driving an large 220 volt AC relay . Across the
contact of the driver relay i placed one RC snubber circut (27NF with 100
R resisitor in series) to help with some spikes that were influencing the
low voltage driver circuits.
The driver circuit is able to detect mains zero crossing and fire the
driver relay at an angle i choose .
From what i read the best point to switch off the power relay is at zero
crossing . I did that and i show a large spike up to 1 KV at the relay
contact followed by a decaying 500hz waveform to 0 volts . After some
experimentation the best point came exactly when switching off at the
peak of the mains voltage .At this point there is smooth decaying
waveform to 0 volt after 5 periods of 500 HZ but no overshoot. The
relay presents no arcing. If i remove the snubber and make the
experiment the best place to switch is zero crossing but i also see large
SHARP spikes up to 500 Volts Peak.
My question is
The switching with snubber must be made at zero crossing or at the peak
of an ac voltage waveform ?
What is the behaviour of the circuit ?.
As i understand any large spikes can harm the X2 capacitor i'm using so
what is the best operating practise ?.

Any help will be appreciated

Michael


Dont switch off at zero voltage, but at zero current.
So monitor across a small sense resistor, and wait for
zero across that.


Just use a comparator IC to test the current, how this fits into

your design, is hard to see from this distance.

 

[Jim Thompson]

<jrwalliker@gmail.com> wrote in message
news:7d492719-d453-432a-8b6e-7db832552de3@u72g2000hsf.googlegroups.com...

As far as I can see from the OnSemi datasheet, the MC33063ADR2G and
MC34063ADR2G are totally identical except for the specified
temperature range (-40 to +85degC vs 0 to +70degC).

Does anyone know of any physical difference between them, such as
altered package construction or materials?

Are the the 33063 devices actually tested at the -40 and +85degC
temperature extremes, or is the difference purely a way of promoting
the device for different market segments (with appropriate cost
adjustments)?

John

Heck No! In terms of functionality, The -40 to +85degC is for Military
application, the other one for commercial use. It said very loud and clear
in the databook.


...Jim Thompson
--
| James E.Thompson, P.E. | mens
|
| Analog Innovations, Inc. | et
|
| Analog/Mixed-Signal ASICK's and Discrete Systems | manus |
| Phoenix, Arizona Voice480)460-2350 | |
| E-mail Address at Website Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

America: Land of the Freedom Abusers, Because of the Bastards.

 

[Fred Bloggs]

jrwalliker@gmail.com wrote:

As far as I can see from the OnSemi datasheet, the MC33063ADR2G and
MC34063ADR2G are totally identical except for the specified
temperature range (-40 to +85degC vs 0 to +70degC).

Does anyone know of any physical difference between them, such as
altered package construction or materials?

Are the the 33063 devices actually tested at the -40 and +85degC
temperature extremes, or is the difference purely a way of promoting
the device for different market segments (with appropriate cost
adjustments)?

Dunno offhand but this surely warrants serious and detailed study, we'll
get back to you...Have you checked the reliability and process screening
links?

 

get back to you...Have you checked the reliability and process screening
links?

Yes, I have now! Thanks for that pointer.

I compared the following parameters for the MC34063ADR2G (0 to +70),
MC33063ADR2G (-40 to +85) and MC33063AVDR2G / NCV33063AVDR2G (-40 to
+125) automotive published on the On-Semi website:

Wafer fab process
Reliability data
Mold compound composition
Lead frame composition
Die attach composition
Plating composition
Wire bond composition

Everything is identical for all temperature variants of the device.

So that answers the question about physical differences - there appear
to be none.

What I can't find is anything to tell me whether the devices are
ACTUALLY tested at temperature extremes.

John

 

[Pieter]

On Tue, 26 Feb 2008 18:33:50 +0100, Sjouke Burry
<burrynulnulfour@ppllaanneett.nnlll> wrote:

michael nikolaou wrote:
Hi

I have a 12 v relay driving an large 220 volt AC relay . Across the contact
of the driver relay i placed one RC snubber circut (27NF with 100 R
resisitor in series) to help with some spikes that were influencing the low
voltage driver circuits.
The driver circuit is able to detect mains zero crossing and fire the
driver relay at an angle i choose .
From what i read the best point to switch off the power relay is at zero
crossing . I did that and i show a large spike up to 1 KV at the relay
contact followed by a decaying 500hz waveform to 0 volts . After some
experimentation the best point came exactly when switching off at the peak
of the mains voltage .At this point there is smooth decaying waveform to 0
volt after 5 periods of 500 HZ but no overshoot. The relay presents no
arcing. If i remove the snubber and make the experiment the best place to
switch is zero crossing but i also see large SHARP spikes up to 500 Volts
Peak.
My question is
The switching with snubber must be made at zero crossing or at the peak of
an ac voltage waveform ?
What is the behaviour of the circuit ?.
As i understand any large spikes can harm the X2 capacitor i'm using so
what is the best operating practise ?.

Any help will be appreciated

Michael


Dont switch off at zero voltage, but at zero current.
So monitor across a small sense resistor, and wait for
zero across that.

The relay is too slow. So you need a delay to switch off at the NEXT
crossing.

Pieter.

 

[Spehro Pefhany]

On Wed, 27 Feb 2008 09:32:09 -0800 (PST), the renowned
jrwalliker@gmail.com wrote:

get back to you...Have you checked the reliability and process screening
links?

Yes, I have now! Thanks for that pointer.

I compared the following parameters for the MC34063ADR2G (0 to +70),
MC33063ADR2G (-40 to +85) and MC33063AVDR2G / NCV33063AVDR2G (-40 to
+125) automotive published on the On-Semi website:

Wafer fab process
Reliability data
Mold compound composition
Lead frame composition
Die attach composition
Plating composition
Wire bond composition

Everything is identical for all temperature variants of the device.

So that answers the question about physical differences - there appear
to be none.

What I can't find is anything to tell me whether the devices are
ACTUALLY tested at temperature extremes.

John

They may be tested to tighter standards at room temperature, so that
they will still meet specs at temperature extremes. Why do you care?



Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com

 

On 28 Feb, 03:44, Spehro Pefhany <speffS...@interlogDOTyou.knowwhat>
wrote:

They may be tested to tighter standards at room temperature, so that
they will still meet specs at temperature extremes. Why do you care?

That sounds plausible.

The application is highly cost sensitive and requires very occasional
operation down to -20 deg C and up to +80deg C (including self-heating
of the housing). The vast majority of the time will be spent between
+10 and +50 deg C.

Parametric deviations at temperature extremes of up to twice the
specified limits would not cause a problem.

John

 

[Eeyore]

jrwalliker@gmail.com wrote:

Spehro Pefhany wrote:

They may be tested to tighter standards at room temperature, so that
they will still meet specs at temperature extremes. Why do you care?

That sounds plausible.

The application is highly cost sensitive and requires very occasional
operation down to -20 deg C and up to +80deg C (including self-heating
of the housing). The vast majority of the time will be spent between
+10 and +50 deg C.

Parametric deviations at temperature extremes of up to twice the
specified limits would not cause a problem.

Well .... the actual device itself (the silicon chip) comes off the same
line. Military devices are merely chosen by selection.

Graham

 

[JakTheHammer]

"Eeyore" <rabbitsfriendsandrelations@hotmail.com> wrote in message
news:47C77FA5.5D0A6A34@hotmail.com...

jrwalliker@gmail.com wrote:

Spehro Pefhany wrote:

They may be tested to tighter standards at room temperature, so that
they will still meet specs at temperature extremes. Why do you care?

That sounds plausible.

The application is highly cost sensitive and requires very occasional
operation down to -20 deg C and up to +80deg C (including self-heating
of the housing). The vast majority of the time will be spent between
+10 and +50 deg C.

Parametric deviations at temperature extremes of up to twice the
specified limits would not cause a problem.

Well .... the actual device itself (the silicon chip) comes off the same
line. Military devices are merely chosen by selection.

Graham

Exactly, the rest of the people think they know what they're talking about.
I've in Electronic for hundreds of years....Heeheee..........Ain't that a
HOOT?

 

[MooseFET]

"Wrecking Ball" <Buckley--fascists@crawford.net> wrote in message
news:GCExj.4153$tW.2399@nlpi070.nbdc.sbc.com...

John McCain's Bizarre 'Conservative Problem'
Matt Taibbi, RollingStone.com
Election 2008: He's gone from laughingstock to presumptive nominee by
campaigning for World War III. So why do conservatives fear him?
It's the day before the Virginia primary, and darkness has fallen outside
the Aviation Museum in Richmond. Inside, presumptive Republican nominee
John
McCain stands proudly before a museum-exhibit version of his own A-4 Navy
jet fighter, plowing through the Poconos-stand-up portion of his stump
speech.

I've heard this shtick so many times by now that a kind of campaign
echolalia has kicked in -- I find myself involuntarily blurting out
McCain's
punch lines before he even starts a joke. At present, we're about two
minutes shy of a prison joke that ends with The food was a lot better in
here when you were governor!

I clench my teeth, bracing for impact. Behind me, a pair of aging Soccer
Moms in acrylic sweaters sing McCain's praises. "I can't even imagine
being
a prisoner of war," says Mom Number One. "It must be so hard."

"Yeah," agrees Number Two. "You know he won't surrender over there."

"Mm-hmm," says the first. Then, after a pause: "Oh, hey, you know what I
watched yesterday? Saving Private Ryan. And We Were Soldiers."

"Oh, those are great war movies," says Mom Number Two. "Great war movies."

Another pause. Then, "Oh, I went to that new buffet," says Mom Number One.
"The one with the salads. I have to say, I'm not that into sweetbreads."

I want to choke the life out of both of them. But how do you communicate
to
someone the sheer insanity of voting to bomb the fuck out of some distant
country while you sit safe and cozy in the Virginia suburbs, evaluating
sweetbreads -- just so the world can keep on feeling like the heroic war
movies you rock yourself to sleep with on Sunday afternoons?

The answer is you can't. And that is one big reason why John McCain,
defying
the expectations of almost everyone who watched him last summer -- myself
included -- has risen from the political dead to wrap up the GOP
nomination.
He's survived because Onward to Victory is the last great illusion the
Republican Party has left to sell in this country, even to its own
followers. They can't sell fiscal responsibility, they can't sell
"values,"
they can't sell competence, they can't sell small government, they can't
even sell the economy. All they have left to offer is this sad, dwindling,
knee-jerk patriotism, a promise to keep selling world politics as a
McHale's
Navy rerun to a Middle America that wants nothing to do with realizing the
world has changed since 1946.

The lesson of the McCain campaign is that one should never underestimate
America's capacity for self-delusion. Balls-deep in one of the biggest
foreign-policy catastrophes of all time, an arrogant military misadventure
destined to make us infamous for a generation across a dozen cultures,
minivan-driving suburban America is still waiting for Bill Holden to make
it
right by blowing up the Bridge on the River Kwai -- and returning, tanned
and handsome, to get the girl with a mouth full of cool one-liners.

I scoot away from the Moms, knowing I can't win any argument here. McCain,
meanwhile, is wrapping up the tale of an old soldier who trained a monkey
to
take his place on the front lines during World War II.

"So I said to him, 'I can see why you weren't promoted,' " says McCain.
"And
he says, 'That's not what made me mad. The monkey retired as an admiral!'
"

The audience roars with laughter. We'll lick this Iraq thing yet!

According to current political wisdom, John McCain is "controversial"
among
Republicans because he lacks true conservative credentials. His main
offenses, ostensibly, are a smattering of domestic-policy positions that
defy the GOP's Limbaugh-Hannity orthodoxy: He took a public stand against
the Spanish Inquisition, he shared a room with Ted Kennedy for a few hours
to fashion a failed immigration bill, he passed a roundly criticized
campaign-finance-reform bill, he accidentally deemed the Bush tax cuts
insane out loud before realizing that this was a political error.

From the battering that McCain is taking lately from the likes of Limbaugh
and skanky bitch-whore Ann Coulter, who vowed to campaign for Hillary if
McCain gets the nomination, one wouldn't know that most of his supposed
crimes were actually based on conservative principles. His opposition to
the
tax cuts, for instance, was based on fiscal responsibility -- i.e., a
desire
to avoid slashing revenues during a period of both high national debt and
massive military spending ("I don't remember ever in the history of
warfare
when we cut taxes"). Only a Bush Republican would call insisting on
actually
having money before you spend it a lack of "true conservatism."

Next page ť
http://www.alternet.org/election08/78024/?page=2

I don't think that McCain has a conservative problem. He has a problem
with
the TurdBlossom mentality that flourished during the George W. Bush
presidency. I wouldn't call people like Sean Hannity, Rush Limbaugh, or
Ann
Coulter conservatives by any stretch of the imagination. What makes the
TurdBlossom mentality truly dangerous are Erik Prince with his Blackwater
"security" contractors who will do anything to continue to control the
White
House.

McCain is so stupid in his word game. He can't beat a Black man. Every one
is being affected by the BUSH's Stupidity and you still want the same thing
back idiot?........Ain't that COOL your so-called "Freedom" ? At the
grocery Stores & Gas pumps?

 

[legg]

forged