audio recording on IC -help wanted

Mon Jul 12, 2010 8:13 pm   

Cydrome Leader <presence_at_MUNGEpanix.com> wrote in
news:i1fomn$64h$3_at_reader1.panix.com:


Won't be long before large numbers of people react to this because they're
supposed to be able to trust the industry that sells them stuff, and firms
get regulated out of business with their heads of staff doing major jail time
for large scale fraud.

Once that happens (and I'm fairly sure it will now, this kind of abuse is
getting out of hand, and in the food and pharmaceutical trades is already
causing an official backlash), the electronics industry is going to have a
hard time selling anything to a public who has come to beleive it is being
exploited as badly as in these instances. A mugger just takes the money at
knifepoint. They don't drug their victims, tie them up, fuck them, and make
them beleive they WANT it. There will come a time when people react to this
so badly that it will change the industry, and only strong technical
grounding will allow anyone to survive in it.

Mon Jul 12, 2010 8:58 pm   

On Jul 12, 10:33 am, Lostgallifreyan <no-...@nowhere.net> wrote:

Fascinating. The one and only direct quantitative specification that
is
compared between the (built-from-discretes) Burson amplifier module
and the integrated circuit amplifiers it replaces, is the price.

'worth less than a can of Coca-Cola', the i.c. op amp is.

Other fascinating facts: IC opamps "suffer from EMI noise",
and "are not designed with a focus on audio".

I always thought it was lenses that were designed with a focus...
and the suffering of opamps hadn't previously come to my attention.

Mon Jul 12, 2010 9:38 pm   

On 07/12/2010 10:33 AM, Lostgallifreyan wrote:

You're right. How offensive that they're trying to pawn off cheap,
semiconductor amplifiers as "high quality audio" when even brain-dead
audiophiles* know that you can only get true quality audio from brown
and tan striped base UG-210 tubes manufactured between December 1931 and
February 1932 in Philadelphia.

Oh -- and they have to be dipped in LN2, and connected with 99.99% pure
copper wires that have also been dipped in LN2.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Do you need to implement control loops in software?
"Applied Control Theory for Embedded Systems" was written for you.
See details at http://www.wescottdesign.com/actfes/actfes.html

Mon Jul 12, 2010 9:59 pm   

Jamie <jamie_ka1lpa_not_valid_after_ka1lpa__at_charter.net> wrote:

wow, a $500 ethernet cable.

Denon just beat Black Box at their own game.

Mon Jul 12, 2010 10:49 pm   

On Jul 12, 1:33 pm, Lostgallifreyan <no-...@nowhere.net> wrote:

I'm reminded of looking for good low dissipation caps. I heard that
teflon were the best, but the only teflon caps I could find were used
by audio types. There was one or two sites that said for best
performance you had to condition the caps by feeding them Gaussian
white noise for one month before using them!

George H.

Mon Jul 12, 2010 11:45 pm   

On Jul 12, 11:33 am, Lostgallifreyan <no-...@nowhere.net> wrote:

I noticed that they "chose" to use lead-free solder. I don't suppose
ROI regs. had anything to do with that.... naw....

Tom P.
Albuquerque

Mon Jul 12, 2010 11:59 pm   

George Herold <gherold_at_teachspin.com> wrote:

amusing.

teflon caps are still being made for real applications, but only where
temperatire is an issue. Teflon isn't all that special as a dielectric
otherwise.

Fri Jul 16, 2010 10:14 pm   

On Fri, 16 Jul 2010 10:47:54 -0700 (PDT), "oparr_at_hotmail.com" <oparr_at_hotmail.com> wrote:


I'm happier now that you explained how a 4V drop sneaked in there,
two wipers bridging large section of element.

Element wound on thick enamelled copper wire? Think I may have opened
a busted one some decades ago.

Grant.

Wed Jul 28, 2010 5:30 pm   

Jamie <jamie_ka1lpa_not_valid_after_ka1lpa__at_charter.net> wrote in
news:MPI_n.7632$Zp1.7078_at_newsfe15.iad:


I was searching eBay for 'cryo', just thought that might be a fun way to
spend a few minutes....

2nd item on the list was this: 270614203579
Sorry, not conveniently clickable but amusing enough to warrant the effort to
visit it. I sent the seller a mssage thus: "Yum, snake oil! Don't you just
love it?" I hope his trollfood tastes nice, I'm hungry. >

Wed Jul 28, 2010 5:50 pm   

Lostgallifreyan <no-one_at_nowhere.net> wrote in
news:Xns9DC3B225830F5zoodlewurdle_at_216.196.109.145:


One more: 120506796961
Specially worth noting for the paragraph about CD's and magnets!
If those people were trading in foods or pharmaceuticals they'd be banned
worldwide. I wonder if the people who buy that stuff also think it extends
their reproductive equipment. Or hopefully, as Michael Flanders and Donald
Swann put it so wisely, it lands them 'flutter on their bottom'.

Mon Aug 09, 2010 8:26 am   

Adam Smith wrote:

power on).

Mon Aug 09, 2010 12:35 pm   

Maxim makes a line of real-time clocks:

http://www.maxim-ic.com/design_guides/en/REAL_TIME_CLOCKS_1.pdf

as do TI, ST, and others. Search "real time clock" on DigiKey. Will
any of these work?

Mon Aug 09, 2010 1:08 pm   

On Sun, 08 Aug 2010 23:12:42 -0700, Adam Smith <adamsmith_at_nospam.com>
wrote:


An RTC chip, such as the Dallas (now Maxim) DS1307 or its relatives. It
handles power management on its own, just toss on a small lithium cell.

Some microcontrollers do have built-in RTCs that can continue to run
while the main processor is sleeping. A separate clock chip gives a bit
more choice as to what processor to use.

You'll probably not find any with exactly your (unspecified) TOY format,
so expect to do a little arithmetic to get the output to the correct
layout for your app.

--
Rich Webb Norfolk, VA

Mon Aug 09, 2010 2:53 pm   

On Aug 9, 1:12 am, Adam Smith <adamsm...@nospam.com> wrote:

Start with the Maxim DS1305 or DS1307.
There are many RTC (real time clocks) out there, so I'm not suggesting
this is the best fit for your application.
But, at least it will get you started. I think Epson also makes RTC.
And you can browse Digikey, Mouser, etc.... to find more.

Good luck. -mpm

Mon Aug 09, 2010 4:32 pm   

Dallas (now Maxim) once dominated the market for real-time clocks:

http://www.maxim-ic.com/design_guides/en/REAL_TIME_CLOCKS_1.pdf

But TI, ST and others are there, too. Search DigiKey, Newark, etc.
for "real time clock".