audio recording on IC -help wanted

[Joerg]

Jim Thompson wrote:

On Thu, 17 Jan 2008 16:35:17 -0800, Joerg
notthisjoergsch@removethispacbell.net> wrote:

Jim Thompson wrote:
On Thu, 17 Jan 2008 16:17:17 -0800, Joerg
notthisjoergsch@removethispacbell.net> wrote:

Jim Thompson wrote:
On Thu, 17 Jan 2008 15:56:55 -0800, Joerg
notthisjoergsch@removethispacbell.net> wrote:

Is there a really, really detailed schematic with guaranteed output
voltage limits versus sink current for the LM324? Most look like this:

http://www.national.com/ds/LM/LM124.pdf

Obviously, page 8 top left and the schematic show that one can get to
around 700mV above the negative rail at 1mA, one BE drop of Q13 plus the
saturation voltage (or close to it) of Q12. But no "hard" data anywhere.
You don't like page 4 ?

Nope, they only give one value there, how much current it is guaranteed
to drive when at 2V above the rail (10mA). Then uA value stated for
200mV isn't too useful, it just confirms that the current source
outlined in the schematic actually made it into production ;-)

10mA is pretty much at the point where the output device loses it. Not a
terribly useful piece of information.
WHY are you using an LM324... CHEAPSKATE ?

Umm, yes, that would be correct. Also the sheer number of suppliers, no
single-sourced parts around here unless there really is a compelling
reason. And usually there isn't a compelling reason.

All LM324's are not made the same. Remember my blacklisting Motorola?

I don't remember. What did their LM324 do to you?

BTW my Barricade needed a few power cycles over the last week. Not good.

Yep, Mine got like that more and more often over time.

I've read that some of the heat sinks in there are on the skimpy side,
at least I'll open it before I give it up. Mostly because of that LPT port.

What did you buy to replace yours?

Linksys BEFSR81

I've got a Cisco wireless here (I believe same brand as Linksys) that
also has a few CAT-5 ports so I can use it as backup should the SMC
croak on a busy workday. I try to have a backup for pretty much anything
essential.

Tried a firmware upgrade before?

Yes. It was current, yet erratic :-(

Some firmwares supposedly could choke up when incomplete or deliberately
mutilated packets arrived, requiring a power cycle. At least that's what
I've read.

Of
course the real cheapskate fix would be to plug it into a timer that
turns it off for an hour after midnight

Yep.

Unfortunately I am going to need that printer port in there ...

Linksys makes a printer switch but, since the printers were wearing
out too, I bought printers with network ports... hp LaserJet 2015dn
and hp OfficeJet Pro K850.

Got one of those as well (Brother MFC). Also has fax, copier and scanner
in there. The sheet feeder is really nice. Every year I had to copy a
huge stack of papers before giving them to my CPA, in case they get
lost. Now it's really easy: Put stack in MFC, hit scan to file button on
PC, go do something else. No waste of paper and 15 minutes later it's
all in one PDF file. Sweet.

We also have a Dymo LabelWriter 400, but it's local to my wife's
machine.

We still write labels by hand, or I print, glue to blank label, then stick.

--
Regards, Joerg

http://www.analogconsultants.com/

 

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[Michael A. Terrell]

JensB wrote:

On 30 Jun., 09:45, "Michael A. Terrell" <mike.terr...@earthlink.net
wrote:

Are you that desperate for attention? You weren't the person that
made the threatening phone calls, or e-mailed death threats to me, were
you?

NO, I WEREN'T!
Dou you think that's funny?!

Regards,
Jens

No funnier than your childish whining: Does THIS look familiar?

Oh gosh,
now I am faced with potential threat if I'm not mistaken.
It's getting interesting...

OMG. I don't think discussion at this level this in necessary...

Be careful what you start online. There some insane people out there
making real threats. Just because you post through Google doesn't mean
that one of them won't be harassing you, like I've had to put up with.
Comments like the ones you made above will increase your chances of
having some loon tying to make your life hell on earth.


--
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

 

[Meat Plow]

I disagree. You should never top poast regardless of the orientation of
the poast you are replying to. Best to bottom poast to all replies.


On Sun, 15 Jul 2007 17:35:36 -0700, FrediFizzx wrote:

"John Fields" <jfields@austininstruments.com> wrote in message
news:v89l93hsoaq9e2s7bcfqa08mrdv70l8026@4ax.com...
On Sun, 15 Jul 2007 14:39:54 -0700, "FrediFizzx"
fredifizzx@hotmail.com> wrote:

"John Fields" <jfields@austininstruments.com> wrote in message
news:4p2l93ttjh3g208te7o34gq0eo0ea9bg3a@4ax.com...
On Mon, 16 Jul 2007 06:42:49 +1000, "Sally" <me@anon.net> wrote:

But the old rule to avoid unpleasant language is as valid as ever.
How
can
you rabbit on about top posters and still resort to foul language?

---
One has nothing to do with the other, "Sally", and by top posting
you brand yourself as an intellectual midget whose grousing about
fowl language is for the birds.

Quite frankly, anyone that can't handle a top post must have
malfunctioning brain connections of some sort.

---
Quite frankly, your "Quite frankly" seems designed to cast you in
the role of an authority on top posting, while your bottom post
shows that you accede to the wisdom of the masses. Good move.

Secondly, it's not a question of not being able to "handle" it, it's
more a question about why a top poster considers his response to an
earlier question important enough to try to juggle time so that his
response will seem to be placed before the question.

It's not a question at all. If someone replies to me with a top post, I
will reply to them with a top post. If someone replies to me with a
bottom post, I will reply to them with a bottom post. The ultimate
netiquette. There is really no logic to either form. Threading a reply
is a different case which the logic is to reply after the other poster's
reply. Unless there is just a short overall comment then it would be
just as logical to top post it.

FD

 

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[Joerg]

Jamie wrote:

Joerg wrote:

Jim Thompson wrote:

On Thu, 17 Jan 2008 16:17:17 -0800, Joerg
notthisjoergsch@removethispacbell.net> wrote:

Jim Thompson wrote:

On Thu, 17 Jan 2008 15:56:55 -0800, Joerg
notthisjoergsch@removethispacbell.net> wrote:

Is there a really, really detailed schematic with guaranteed
output voltage limits versus sink current for the LM324? Most look
like this:

http://www.national.com/ds/LM/LM124.pdf

Obviously, page 8 top left and the schematic show that one can get
to around 700mV above the negative rail at 1mA, one BE drop of Q13
plus the saturation voltage (or close to it) of Q12. But no "hard"
data anywhere.

You don't like page 4 ?

Nope, they only give one value there, how much current it is
guaranteed to drive when at 2V above the rail (10mA). Then uA value
stated for 200mV isn't too useful, it just confirms that the current
source outlined in the schematic actually made it into production ;-)

10mA is pretty much at the point where the output device loses it.
Not a terribly useful piece of information.


WHY are you using an LM324... CHEAPSKATE ?


Umm, yes, that would be correct. Also the sheer number of suppliers,
no single-sourced parts around here unless there really is a
compelling reason. And usually there isn't a compelling reason.

BTW my Barricade needed a few power cycles over the last week. Not
good. What did you buy to replace yours? Tried a firmware upgrade
before? Of course the real cheapskate fix would be to plug it into a
timer that turns it off for an hour after midnight

Unfortunately I am going to need that printer port in there ...

Yes, Replace the caps.
I had some issues with my not to long ago.

Thanks. The electrolytics in the power supply inside the router? That's
kind of disappointing. Those routers used to be on the pricier side,
metal case, no wall wart and all that.

--
Regards, Joerg

http://www.analogconsultants.com/

 

[On Web]

"Lostgallifreyan" <no-one@nowhere.net> wrote in message
news:Xns9953610FDCF07zoodlewurdle@140.99.99.130...

"On Web" <a@b.com> wrote in
news:j3fdi.5003$tj3.2717@newsfe7-win.ntli.net:

Jim is also trying to capture the phone numbers of people calling the
line, so maybe that's the application..


I only see one post from him, the first one:

Jim <nomail@riomail.com> wrote in news:Xns99526A09F520B5D4AM2@127.0.0.1:

I am in the UK.

Can I build a simple device which would switch a pair of contacts on/off
when my landline phone was being used.

Am thinking of something like this. There might be a simple reed switch
(do such things still exist) which would close its contacts if there was
a current on the phone line.

Perhaps I might need to improve the situation and wind the landline (or
maybe just one of the two wires) around the reed switch.

Would something like this work?

Or can I buy a simple plug-in device for something like a fiver which
closes its contacts when the phone line is active?


There is no claim of any attempt to capture callers' numbers there.

No, but see the other thread by Jim.

Regarding issues of recording, deriving switch signals, this is legal in
the UK, you just have to watch how the law applies in specific instances.

There are plenty of legal things I don't think people should do and there
are plenty of illegal things people do regardless of the law.

You talk of 'jury rigging' a phone line, which is as loaded a phrase as I
ever heard, it implies some kind of illicit activity. Any real jury knows
that a person is guilty until proven innocent.

You have the intended context wrong. I was thinking in terms of jury rigging
equipment - adapting/customising it if you wish, certainly not a use of the
word jury in a legal sense.

If you want to be cautious, just point the OP to a page that discusses the
regulations governing user connections to the user side of the master
socket wiring, and the laws governing lawful making and use of
recordings. The rest you must leave to their discretion, you can't police
their morality.

Well clearly I can't police people morality, neither do I or anyone else
have to aid people either.

The easiest course is to look at what is commercially available in a shop.
If it's on open sale, it is safe to assume that discussing its function is
not only legal, but wise, and it might be cheaper to make than to buy.
Doubtful though, unless you buy from Maplin or other shop that charges
around twice what many shops accept as reasonable.

The commercial availability of things has no bearing on their final
application.

 

[Albert Manfredi]

On Jul 15, 4:21 am, "Mr.T" <MrT@home> wrote:

Mostly people choose what is readily available at an affordable price.

Universal dislike for something counts as more than just "what is
readily available at an affordable price." Sorry.

Or not, discotecques use deep pounding bass to give their customers a dance
beat. Doesn't seem to drive them away

Yes, but there's a big difference between *prolonged* bass and
periodic bass, perhaps at approximately 1 Hz or so. Which is
reminiscent of a heartbeat, therefore natural and presumably pleasing.

Or more likely just ending up with another example of the irrational
behaviour patterns of humans.

I don't think it's irrational to expect humans to be put off by
sources of articial light whose color temp is not what they evolved
with. Defense mechanisms typically work that way, matter of fact.

Anyway, this has to be one of the longest threads in usenet history
(probably not, actually).

Bert

 

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[robb]

it is a connector device that you clip/solder on the edge of a
pcb that looks like an IC pin when your are done... but it is on
the edge of a PCB

what i am trying to do is create another PCB DIP 40 adapter for
a smaller SMT/SMD chip package. the PCB will have traces on one
side for the SMD chip where pin traces lead to the pads along the
edge of PCB to accomodate these pin connectors.
The PCB part will be cut to the size of a DIP 40 device
(obviously. ? ) so with ??pins installed?? look like a
Franken-DIP-40 with a SMD chip piggy back

the **space is very tight ** and i also want sturdy pin
connectors. I have seen these used somewhere but can not figure
where so as to show an example

thanks for any help,
robb

 

I want control the read and write (SRAM single data port AT60142)
with
FPGA
link http://www.atmel.com/dyn/resources/prod_documents/doc7726.pdf
but I want stick a read cycle and write cycle in the SAME adress See
below

CS ----\_________________/------
RD ----\_______/-----------------
WR -----------------\________/-----------
data ----Z--<--data-->Z


The data sheet indicate the data still on the bus 8ns after the RD
raising edge.
But i m problem with (tGHQZ : time OE high to high Z)
I think, i can't write with WR falling edge juste after read.
According your experience
Can I do that?

 

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[Joerg]

JW wrote:

On Tue, 02 Dec 2008 16:02:59 -0800 Joerg
notthisjoergsch@removethispacbell.net> wrote in Message id:
X0kZk.8403$x%.4487@nlpi070.nbdc.sbc.com>:

Hello Folks,

For an experiment a client needs a 3.3V/15A or larger supply, must be
linear. Checked the usual suspects and at 10A there's pretty much the
end of the rope these days. 5V/25A could be useful if I can get in there
and hack it, should have enough SOA to deliver 3.3V/15A.

Does anyone know where to get one? Can be used/salvaged as long as it
works and is linear.

A switcher might work if it has next to nothing in ripple. Most are
50-100mV, won't work. I want to avoid having to build a post-regulator.
But if nothing's there, man's got to do what man's got to do.

Dang, I had two supplies 5V/30A until my wife said it's time to clean up
the garage :-(

How about this one?
http://www.mpja.com/prodinfo.asp?number=8522+PS

Hooray! Thanks! Looks like it might be a classic uA723 design so a hack
should be a piece of cake.

--
Regards, Joerg

http://www.analogconsultants.com/

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

 

[LVMarc]

arjav1ec@gmail.com wrote:

Hi,

I am a student of ME. I am doing my final year project on
piezoelectric in shoes. Piezoelectric is located in shoes, while
walking, piezoelectric compressed and it generates an electric signal.
this electric signal is stored in capacitor in other words, this
electric signal charges a capacitor.

I need a piezoelectri for this application. which type of electric
suits? which specifications i need to buy it? do you have any idea ,
from where i can buy it online?

Thanks.

Regards,
Arjav Bavarva.

Have thought abput your assignment. Very tricky aspects. The most

prolific and pobust piezo-electric devcie would be the push to start
ignitos on a barbeque. you can buy spare parts of just the ignitor at
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good luck

marc

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[MichaelS]

Hello NG

I have problems with S-RAM memory chips of BSI typ BS62LV4007SC(I)P55.
The elements are used in a disturbance recorder. They are supplied
through a lithium battery at power failure. Some of these chips fail
from time to time. Somebody made similar experiences with these
chips ?

Thanks for your Effort

 

[Lostgallifreyan]

Lostgallifreyan <no-one@nowhere.net> wrote in
news:Xns9970EFECC4488zoodlewurdle@140.99.99.130:

don@manx.misty.com (Don Klipstein) wrote in
news:slrnf9qf1q.t4p.don@manx.misty.com:

Why do people need shortwave light to avoid eyestrain?


Try it. Take a red LED and a blue LED. Bright enough to read by. Both
outputting the same amount of light, as judged by eye, when their
beams are side by side on a white wall. Read some small print for a
while, or walk around a dark cluttered room using them as torches. The
red light won't reveal the detail with the same clarity.

I just tried this and I have to say it didn't work as I thought. The
blue was less bright than the red but that still didn't account for it.

I think it's probably the green part of the usual spectra we see by that
makes the difference. If we use hotter tungsten the ratio of red to green
favours green more than with cooler tungsten, and we're more sensitive to
green, so a smaller hotter source can make useful light more efficiently
than a larger cooler one. If it's biased too much toward blue I guess the
same problem occurs as with light that is too red.

 

[Phil Allison]

"Mr.T"

Homes in Australia are mostly all electric.

Yes, mostly. Some hydro electricity,

** In Tasmania, it is 100% hydro.

Massive amounts of it too, compared to the small population.




....... Phil

 

[Frank]

I heard Digikey kill off the enjoyment by their high pack & postage fee, if
you have a real big order it is not so bad you can spread out the cost.


legg <legg@nospam.magma.ca> wrote in message
news:n7oj73lshp38aofg48b90tv9igcl87icm7@4ax.com...
On Wed, 20 Jun 2007 20:58:57 +1200, "Frank" <erty@home.com> wrote:

I need two of each to repair two switch mode power supplys

SPW47N60C3 Cool MOST Power Transistor

SDT12S60 Silicon Carbide Schottky Diode

Both parts in stock at Digikey, and available in small quantities..

http://www.digikey.com

RL

 

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