audio recording on IC -help wanted

[aubrey.mcintosh@gmail.com]

I was reading

<http://www.kemet.com/kemet/web/homepage/kechome.nsf/vapubfiles/
A700%20Series.pdf/$file/A700%20Series.pdf>

and I notice a "pointy hexazoid" in the outline drawing. Duh, which
end is positive?


I am laying out a board with USB, and I was going to put a 120uF
capacitor across the power near the connector, and the part in stock
at Mouser, A700D127M006ATE0157222, caught my attention.

Why would I avoid / seek this technology?
Any guess how long these might last in a device in a home / office
environment?

 

[Martin]

Anyone know where to obtain the odd-looking plug that is on the end of
present-day JVC camcorder AC-adapter cables? It's sort of a
rectangular cross-section, but with a lip on one edge.

I'm wanting to make a regulated external battery pack for my MG155US
camcorder, and I'm stumped on the connector-availability thing.

thanks,

Martin

 

[AndersG]

Used in a low-power psu:
http://focus.ti.com/lit/an/slua016/slua016.pdf

I assume it is not very critical? Would a 2Sk170 do? The circuit will
regulate 3.7V from 9-16V DC.

 

Big discount on brand new motherboards http://cheaphardware.blogspot.com/

 

[Lostgallifreyan]

krw <krw@att.bizzzz> wrote in
news:MPG.211e43e0d520ff8d98a890@news.individual.net:

In article <p4r7b3p66j5ntfi4ec318nnqeh4tl3ofpi@4ax.com>,
SomeKindOfWonderful@allthegirlsintheworldbeware.org says...
On Fri, 03 Aug 2007 13:45:01 GMT, "Michael A. Terrell"
mike.terrell@earthlink.net> wrote:

Bungalow Bill wrote:

I'm an idiot.


A two year could perform better than you.

Trying to air out all your dirty socks, Dimbulb?

Eureka! I have it! It fits now, the dummy cell in the subject of this
thread. Exactly what we need to illuminate a dimbulb. >

 

[Palindrome]

Alex Coleman wrote:

Am in the UK and have a DECT handset containing two AAA NiMH cells.

The manufacturer says it is alright to indefinitely leave the handset
in the charging cradle. Maybe the charging is done so gently that it
is ok.

However the cells last for several hours talktime so they will never
properly run down before being put back on charge.

This means the recommended first few charge-discharge cycles will
never occur

Is a charging regime where the handsets are always replaced back on
charge likely to noticeably reduce available battery capacity?

How about this? -- Is it worth leaving off the charging cradles the
DECT handsets for a several days in order to have them run down on
their own and then putting them into their charging cradles? ISTR
that NiCds tended to like this sort of regime.


NiMH cells do not have the memory effect that you are thinking of.

The worst thing to do to most batteries is to let them run down and then
leave them in that state, eg by forgetting to put them back on charge.

The charger is charging them at a very low rate that can be sustained
indefinately. That's why the things take so long to charge initially..

Leave them on the charger.

--
Sue

 

[greenplanetsolutions@gmai]

Hello

I operate an industrial surplus reuse store site called
reusestore.com. We deal with a lot of older obsolete parts. I also run
a company called Green Planet Solutions inc. We specialize in WEEE and
RoHS directives and engineering support. (www.atotalgps.com)

One of the reasons why I wanted to write in this message board is to
share some information with every one as are part of the data
collection on what we are seeing and some thing to think about.

When RoHS and WEE were first introduced to our clients here in the US
we saw a tendency to have a knee jerk reaction. Some clients wanted to
buy up as many old leaded parts as they could while they tried to
cross over to totally lead free products and processes.

While this can be a good plan it can damage you greatly also.

One of the first problems, among hundreds of others, is that when you
buy up older leaded components you have no idea if your states local
EPA laws will be changed and effect the use of your now thousands of
dollars worth of store leaded components.

Take for instance California EPA local prop 65. Certain fire
retardants that are found in some electronic component packages are
now deemed illegal for use in this state.

Others like cadmium, among other materials, are not only restricted
from use in the EU, but now the US is starting to adopt the EU RoHS
regulations.

Most components that are not RoHS compliant will not be able to be
sold into the market in new products.

Most of our stock in our reusestore.com is only slated to be used as
replacement parts for products put on to the market before Jan 2006.

In most cases we research the components to see if they are higher in
the levels and then we send them to the proper recycling channels.

My worry I think here is, that in most cases, companies are putting
off this effort to change over to RoHS compliancy until the very last
moment where they could get caught in the local EPA laws cross fire.

What do you think?

Mike Dolbow

 

[Jim Thompson]

On Wed, 19 Mar 2008 14:57:32 -0700, John Larkin
<jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

On Wed, 19 Mar 2008 13:41:29 -0800, "UltimatePatriot"
UltimatePatriot@thebestcountry.org> wrote:


"John Larkin" <jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in
message newsus2u3lrffafureo4nkdf2gaa36kj0j03s@4ax.com...
On Wed, 19 Mar 2008 12:28:16 -0700 (PDT), mrdarrett@gmail.com wrote:

rabbitsfriendsandrelati...@hotmail.com> wrote:
High fuel cost and high food cost...... through your stupid
war...heeheeheee.......

You called everyone terrorists and ignored humanity... You killed
over a
million innocents in IRAQ and you never count them as human....

God damn you...

The number is less than 100,000 you fucking idiot, and they are not
Iraqis.

Many are Iraqi innocents that were killed by insurgent retards.

Over a million? You are over the top of stupidity. That makes you a
total retard.



Weeeeell, there were around 100,000 back in '04...
http://www.guardian.co.uk/world/2004/oct/29/iraq.sarahboseley

Now it's around 600,000-ish...
http://www.washingtonpost.com/wp-dyn/content/article/2006/10/10/AR2006101001442.html

and that was in '06.

Anybody concerned about Iran?

Anyone?

Oh well... there's always Costa Rica to flee to...

MD


Sadaam killed 2 or 3 million people in his 20 years in charge. The
corrupt UN "food for oil" program helped him kill a good fraction of
those millions.

The difference is that he didn't allow the world's press corp to
report every incident.

John




BULLSHIT! you last said Saddam killed 168 people back in 2003,


Cite? Over a million died in the Iran-Iraq war alone.


then
180,000 people recently,


Cite?


now he killed 2 millions people to justify for
your evil?

Keep making thing up as you go shit eater, just like your fucking Rosy
economy.


The Ultimate Shit of Americunt.



Wow, you are really obsessed with poop. It doesn't appeal to me at
all.


John

I guess I'll need to make a compound filter to kill your responses to
TURD.

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC'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 Free, Because of the Brave

 

[John Larkin]

On Tue, 22 Jul 2008 22:42:13 -0500, "==Harley==" <Heat@HotHot.com>
wrote:

The world may need it, but it's not gonna get it. Fusion is always 10 to 15
years away.

So are fuel cells.

John

 

[Bob Urz]

pfjw@aol.com wrote:

Issues with LEDs today:

Color rendering
Diffusion

Once those are solved effectively, they will be excellent
alternatives. My guess is 5 years to color rendering, and 5 more to
diffusion. Most LEDs today filter a single color to a specific
monochromatic output. Even the LED-type flashlights are very heavily
skewed to the blue end of the spectrum in order to get sufficient
brightness, and require multiple LEDs to get even a minor beam with
very poor diffusion.

Peter Wieck
Wyncote, PA

http://members.shaw.ca/sagelighting/led_spotlights_and_bulbs_specifi.htm

http://www.electronicproducts.com/ShowPage.asp?Filename=hlap01.jun2006.html

http://www.californiagreensolutions.com/cgi-bin/gt/tpl.h,content=270

http://www.ledsmagazine.com/news/4/1/4

http://www.mew.co.jp/e-tecrepo/531e/main02.html
http://www.mew.co.jp/e/corp/news/2006/0603-01.htm

http://www.eetimes.com/showArticle.jhtml?articleID=181503227

Bob

----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption =----

 

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[Boki]

Hi All,

I am connecting to Nokia phone, due to its output is only USB signal,
even it can emulate com port at PC side, however, it need USB host
( and driver )

I am implementing on embedded system, I believe you know what I need.

Could you please adivce the sutible chip for me ?

I want as cheap as possible.


Best regards,
Boki.

 

[DaveC]

I want to keep some NiMH rechargeable 9v batteries in my tool bag (well, my
meter bag, actually). I am currently running a double loop of electrical tape
around the entire battery to insulate the terminals.

I'd like to use something more durable (one battery has had a terminal peek
through the tape) and was thinking about something like a battery terminal
connector but made of insulating material like nylon (probably of some
cheaper plastic).

Does such a thing exist? I did web searches, but maybe my terminology isn't
spot-on...

Ideas?

Thanks,
--
DaveC
me@bogusdomain.net
This is an invalid return address
Please reply in the news group

 

[Joerg]

Uwe Bonnes wrote:

Pieter <dit3_werkt_ook_niet@hotmail.com> wrote:
Hi,

I am building a device that can measure noise from resistors and
semiconductors. The source resistance ranges 0.2 Ohm to 20 MOhm.

But mostly semiconductors have to measured, and the range that is most
important is 500 Ohm to 2500 Ohm. That is the basic resistance of
those devices.

The frequency ranges to be measured are 0-10 Hz and 0-1 MHz. And the
noise is low, maximum of the semiconductor devices is 10 dB (compared
to the resistance 500 to 2500 Ohm), probably less.

For this project, I am searching a low noise N-JFET for the input
stage. This will be followed by a very low noise opamp like the AD797
or LT1028. The drain current will probably be something like 10 mA.

My questions:
What N-FETs (BFxxx? 2Nxxxx?) are really low-noise? Searching
datasheets is hopeless.
Does anyone here have advice about the input stage? Do you think a FET
input with opamp following it will do? Or can you think of better ones
that have lower noise, and lower input capacitance?

The BF862 is very low noise.

I was just going to suggest that one, it ought to be the lowest noise
JFET around. However, as Martin pointed out one may have to consider the
sub-audio region. NXP's data sheet is, ahem, rather skimpy. Do you (or
Martin) know about any study of the BF862 below, say, 20Hz?

Also, does anyone know what happened to the old 2N4417? Can't find it
anywhere these days.

Look at the Linear Technology site to use it in conjunction with low noise
fast Op-Amps.

I am a bit partial to the Texas THS series. Mostly because many can be
used at +/-10V and more, resulting in lots of dynamic range.

--
Regards, Joerg

http://www.analogconsultants.com/

 

[Jim Thompson]

"UltimatePatriot" <UltimatePatriot@thebestcountry.org> wrote in message
news:usb3u3hdqsnjpj4d9r6a29tgbedfttl5ii@4ax.com...

On Wed, 19 Mar 2008 15:13:59 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@My-Web-Site.com> wrote:


I guess I'll need to make a compound filter to kill your responses to
TURD.

...Jim Thompson
--
Said the idiot that has responded to every post I have made, declaring
your "filter catches".

I don't think there is anyone on the planet that acts as retarded as
the ThompsonTard does.

Aside from that, you fucking retard... Larkin responded to a forger's
post, idiot!

You are a terror if you disagree with me fucker. We gonna fuck every body
until we made Russia and China angry enough to destroy us, we don't care
if we gonna to the dirt poor like those S. Americans.



PS. The best cure for your smelly cock? Wash my dick instantly after
pulling my dick off a dog's ass.
So keep in mind folks if you don't want to carry that smelly cock to a
public place.



...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC'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 Free, Because of the Brave

 

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[Jamie]

Stephanie wrote:

Not sure what series this is

- NPN or PNP bipolar
or
- FETs

small-signal transistors in through-hole DIP package.

Where should I start looking?

Stef

I think what you're looking for are

transistor arrays.
They come in many forms.

http://web.mit.edu/6.301/www/LM3086.pdf
ULN2002A are open collector types good for 50volts at a .5 amps.
http://www.onsemi.com/pub/Collateral/MC1413-D.PDF

Ect..
google hits = 68,600

You should try it.

--
"I'm never wrong, once i thought i was, but was mistaken"
Real Programmers Do things like this.
http://webpages.charter.net/jamie_5

 

It came out of a GPS / Bluetooth reciever, I think it's a motion/
vibration sensor of some sort, to save battery, ie when it hasn't
moved for a certain amount of time the unit will shut off. It probably
generates a closed circuit when the ball(or whatever) inside moves and
touches off 2 different terminals.

Can't seem to find any examples of them on the web though.

 

[Mr.T]

"Albert Manfredi" <bert22306@hotmail.com> wrote in message
news:1184542307.793624.265940@o61g2000hsh.googlegroups.com...

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.

IF we were talking *universal* dislike then I might agree.

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.

No *proof* though that artificial light MUST be different from natural
light.
Only the preferences of many accustomed to it being so.

Defense mechanisms typically work that way, matter of fact.

I'm interested to know what's the "defence mechanism" that benefits from low
color temperatures?

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

A hell of a long way from it actually.

MrT.

 

[Radius]

Hi there..

Sometime lurker first time poster.

I'm working on an older mid 90's vintage cnc motor controller board.

The magic smoke has been let out of several of the 2SK1277 MOSFETs on
this board along with the IR2110 high/low controllers.

The problem I'm having is finding a suitable substitute for the
2SK1277. I've found some IR2110 ICs, but cannot find any of the
2SK1277.

In all honesty I'm not that great at this stuff, although I do manage
to get most of the stuff working I attempt to repair. What I'm looking
for is some help in determining a good sub for the MOSFET I need. One
caveat, it does need to be in a TO-3P package due to how the board/
heatsink combo is built.

Data sheet for the 2SK1277 is here:
http://www.ortodoxism.ro/datasheets/fuji/2SK1277.pdf

A possible replacement that may or may not work (help!) is here:
http://www.fairchildsemi.com/ds/FQ%2FFQA30N40.pdf

Thank you for any help!
Michael