audio recording on IC -help wanted

[Michael A. Terrell]

PT wrote:

Thanks to everyone's replies so far.

Watson, Yes Grainger does have them and for a good price. I will have
to look into if they will sell to a private party without a minimum
order. If not, maybe I can find out if someone at work is placing an
order with Grainger and see if I can piggy back onto that.

Wayne, nope, Sciplus.com doesn't have them. I have had them bookmarked
for a while (neat place) so I did search them back when I first started
looking for the cap.

Jim, Ya you are probably right. I just need to locate a shop or
electrical supply place nearby that has a counter and welcomes walk-ins
(many don't even want to see you if you are not a corporate account
holder). I was just hoping I could find a place online where I could
order it for a reasonable price and let it arrive on my door step
rather than going or calling various repair or supply houses. You know
how a lot of those places can be, where you call up and they are sort
of surly and when it is clear you want ONE capacitor they are not all
the interested in talking to you as they would be if you were calling
for a box of them or lighting fixtures for a new construction project
or that sort of thing. I went thru that years ago when I was looking
for a certain fluorescent lighting ballast for a homemade lighting
fixture to be used on an aquarium. The ballast was only $22 and I only
needed one. Usually the first question was "Do you have an account with
us?". Anyway, sorry to get off on a sort of side rant.

PT

Where do you work? Do they have any commercial accounts with
suppliers? If so ask the one of the maintenance crew to pick it up for
you. They can pay cash and they don't want to lose business to a big
customer. I could walk into Grainger's and tell them where I worked, pay
cash and tax with no questions asked because my employer spent at least
$1000 a month on light bulbs and ballasts.
--
Former professional electron wrangler.

Michael A. Terrell
Central Florida

 

[Michael A. Terrell]

Dave Platt wrote:

So, it would not be surprising if the sprays to which you are
referring are a mixture of somewhat-purified oleic acid, with solvents
(e.g. various alcohols) and propellants (propane and/or carbon
dioxide).

And, as a followup... it looks as if it wouldn't be difficult or
expensive to experiment with this stuff to see if it's the real thing.
After a few minutes of searching on Google I see one supplier selling
oleic acid for under $14/gallon (purity not stated), and another
selling laboratory-grade for $24 per pint or $95 per gallon.

One could make a lot of contact cleaner with a gallon of this stuff

--
Dave Platt

And do a lot of damage to parts if the mix is wrong. There have
been a number of cheap knockoff contact cleaners that damaged plastics,
washed away the carbon track on pots and caused arcing in switches.

--
Former professional electron wrangler.

Michael A. Terrell
Central Florida

 

[Watson A.Name - \"Watt Su]

"clicliclic" <clicliclic@freenet.de> wrote in message
news:8b226cfb.0504140931.55c61f85@posting.google.com...

Hi,

what is the active ingredient for the removal of oxide and sulfide
layers that is found in standard contact cleaning sprays? If you put
some spray some onto white paper it will leave oily stains of a
reddish color.

Fifty years ago such an orange or red oily liquid used to be available
in small bottles, and just a small droplet was applied to a contact to
be cleaned.

Is the active ingredient an organic liquid of red color, or perhaps a
solid red chemical dissolved in an organic solvent? What is its name
or chemical formula?

Some of the stuff I bought is labeled residue free and I found that it
doesn't leave any residue. I think it's made by CAIG Labs.

> Tia, Martin.

 

[Watson A.Name - \"Watt Su]

"PT" <westford97-google1@yahoo.com> wrote in message
news:1113496657.497909.202170@z14g2000cwz.googlegroups.com...

Thanks to everyone's replies so far.
[snip]

HTH.

I was just hoping I could find a place online where I could
order it for a reasonable price and let it arrive on my door step
rather than going or calling various repair or supply houses. You know

Try this. Just type capacitor into the search window.
http://www.mcmaster.com/

how a lot of those places can be, where you call up and they are sort
of surly and when it is clear you want ONE capacitor they are not all
the interested in talking to you as they would be if you were calling
for a box of them or lighting fixtures for a new construction project
or that sort of thing. I went thru that years ago when I was looking
for a certain fluorescent lighting ballast for a homemade lighting
fixture to be used on an aquarium. The ballast was only $22 and I only
needed one. Usually the first question was "Do you have an account
with
us?". Anyway, sorry to get off on a sort of side rant.

Been there, done that, got the T-shirt.

PT

 

[Robert Learney]

Have you tried buy.microchip.com - I got mine directly from there.

-Rob.


Astroman wrote:

Hi,

Does anyone know where I can get hold of the surface mount version of the
PIC10F series here in the UK ? Crownhill only do the 8 pin DIP version
which I think really defeats the object when only 6 pins are used!

Tried Maplin, Farnell and RS and they don't do them. Any help much
appreciated.


Tim

 

[John Woodgate]

clicliclic <clicliclic@freenet.de> wrote (in
<8b226cfb.0504150907.38e9e77d@posting.google.com&gt about 'contact spray
ingredient(s)', on Fri, 15 Apr 2005:

So either oleic acid polymerizes to some extent (after all it does
have a double bond)

I think it oxidizes rather than polymerizes. It's a derivative of a
'semi-drying oil', although not a very marked one.
--
Regards, John Woodgate, OOO - Own Opinions Only.
There are two sides to every question, except
'What is a Moebius strip?'
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk

 

[Wayne]

"PT" <westford97-google1@yahoo.com> wrote in message
news:1113315029.114154.281630@l41g2000cwc.googlegroups.com...

Looking for a replacement motor start capacitor. You would think this
is something easy to find, but places that sell well pumps and parts
only sell the whole control box and not the individual components
inside. Anyway...

Here is what I am looking for...

http://tinyurl.com/3utv2

Problem is, this place in the above URL (meci.com) has a $20 minumum
order PLUS another $8 or whatever it is for shipping. So this $1.40 cap
would actually cost me nearly $30 and I would have to come up with more
stuff for the cart which I don't really need or want.

Other places that have them like Mouser, etc. tend to want $15+ per cap
plus shipping again. I have been searching for other surplus places
that may have them, but so far no luck.

So if anyone has anything like this laying around their electronics
junk pile or knows a place that sells this sort of thing without a big
minimum and/or big shipping charges, please let me know.

Thanks,
PT

PT,
Another possible source.

http://www.surpluscenter.com/sort.asp?UID=2005040612364749&catname=electric&keyword=EMSC

Wayne

 

[Watson A.Name - \"Watt Su]

"Denny" <dennis702717@yahoo.com> wrote in message
news:2cbb2002.0504150724.5705747c@posting.google.com...

NEW 1 WATT RED APOLLO LED BEATS LUXEON STAR (?)

The Subject line, above, is from an eBay vendor. Anybody know if the
seller's claim is accurate?

The seller also said, in respect to new competitor to Luxeon: "There
is another competitor as well; Cree's X-Lamp preforms about equivelent
to a 3 watt star but only draws 1 watt of power."

I'd like to hear from anybody who has tried the X-Lamp, and can
comment on how many hours it works before dimming (lifespan.)

Also, where to buy Cree and Apollo at the lowest prices. Thx.

I have purchased LS LEDs from Mark Hannah (Quickar) and I consider him
to be a reputable dealer. Whether or not the statement he made is
advertising hype is another matter.

 

[John Woodgate]

clicliclic <clicliclic@freenet.de> wrote (in
<8b226cfb.0504160922.1ab85949@posting.google.com&gt about 'contact spray
ingredient(s)', on Sat, 16 Apr 2005:

Oleic acid should therefore be much harder to (oxidize and) polymerize.

Yes, oxidation comes first, and it IS slow. So polymerization is even
slower.

I am no chemist, and all this is taken from my reference on organic
chemistry!

You're doing OK so far.
--
Regards, John Woodgate, OOO - Own Opinions Only.
There are two sides to every question, except
'What is a Moebius strip?'
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk

 

[Wouter van Ooijen (www.vo]

Have you tried buy.microchip.com - I got mine directly from there.

but for the 6-pin chips they have a hughe minum order quantity!


Wouter van Ooijen

-- ------------------------------------
http://www.voti.nl
Webshop for PICs and other electronics
http://www.voti.nl/hvu
Teacher electronics and informatics

 

[Mike Harrison]

On Sun, 17 Apr 2005 09:11:37 GMT, wouter@voti.nl (Wouter van Ooijen (www.voti.nl)) wrote:

Have you tried buy.microchip.com - I got mine directly from there.

but for the 6-pin chips they have a hughe minum order quantity!

Not showing any minimum when I looked just now.... (could be that this varies by country though)

 

[Graham W]

I'll add the Siliconix 1979 info to the right:
tlbs wrote:

I couldn't find anything in any of my databooks (some of them quite
old).

The 2N3436 does cross reference to an NTE 133, which is:

JFET N-Ch General Purpose AF Amp/Switch
BV[GSS] min = 25 V -50v
V[GS] max cutoff = 6 V -9.8v
I[DSS] (min - max) = 0.5 - 15 mA 3.0 - 15mA
C[ISS] max = 6 pF 18pF
C[RSS] max = 2 pF no info
g[FS] = 40000 umho 2500 - 10,000umho@1kHz
Power diss, max = 300 mW 300mW (@ or below 25şC)
Noise Factor 2dB

Hope this helps. Me Too!

--
Graham W http://www.gcw.org.uk/ PGM-FI page updated, Graphics Tutorial
WIMBORNE http://www.wessex-astro-society.freeserve.co.uk/ Wessex
Dorset UK Astro Society's Web pages, Info, Meeting Dates, Sites & Maps
Change 'news' to 'sewn' in my Reply address to avoid my spam filter.

 

[Wouter van Ooijen (www.vo]

but for the 6-pin chips they have a hughe minum order quantity!

Not showing any minimum when I looked just now.... (could be that this varies by country though)

You are right. The minum was there some timne ago (IIRC one reel, =
1500). Not any more


Wouter van Ooijen

-- ------------------------------------
http://www.voti.nl
Webshop for PICs and other electronics
http://www.voti.nl/hvu
Teacher electronics and informatics

 

[Watson A.Name - \"Watt Su]

"Jimmy V." <isagency@freeler.nl> wrote in message
news:889cc650.0504190731.57cbdc3d@posting.google.com...

Free information on the latest goods in the Security business. Surf to
http://www.isagency.net to get educated. Hard and software security is
needed to ensure a long lifespand for a business.

The web page sucks. Not only that, but I can't find any contact info to
tell the bozo that it's rude to post commercial advertising in
discussion newsgroups. ID-ten-T!

 

[AutoTracer]

Sounds like either of those relays will work. Both are 12V and about the
same current for the coil and both have contacts rated for 115V (i assume
because you didn't include it for the second one)at least which is what the
lock uses.

The first one is SPDT So you get one switch with one NO and one NC contact
on it. You use the NO side for your application. The second switch DPST is
two switches both having only NO contacts only. You can use either one of
these switches.

A relay with DPDT contacts is like the SPDT but has two switches and is
quite universal because it can be wired many ways. Enclosed relay sounds
like a good idea for safety but may not be necessary if they are all in a
closed box.

The first part of your description seems to contradict the second. SInce
there may be uncertainty, the SPDT switch will give you one of each NO and
NC contacts in case you got it backward.


I think maybe you are saying the feature module has a NC switch contact
output but the lock needs a NO switch input. The Feature module drives the
realy 12V coil. When unlocking, the feature module switch opens up and this
de-energizes the relay which Closes the NC contacts and activates the lock
solenoid. In any case go with the SPDT so you can try it either way.



"Vittorio" <cropseyironworks@verizon.net> wrote in message
news:1113958163.622274.204540@f14g2000cwb.googlegroups.com...

I've purchased a phone system that's capable of releasing typical
magnetic locks remotely from any extension phone. An accessory called
"external feature module" is responsible for deacivating a mag lock via
a terminal block controlled by any phone. The circut is normally
closed, when opened the power to the mag lock's rendered deactivated.
My mag lock has to be deactivated by closing two leads. For some reason
the manufacturer doesn't want the lock to be unpowered in order to gain
egress. Here's my question. The telephone manufacturer tells me I need
a "normally open" relay that serves a nomally open circut for my type
of mag lock. If I select a 12 VDC (INPUT VOLTAGE) SPDT (CONTACT TYPE)
10 AMPS (LOAD RATING @240 VAC), (POWER COMSUMPTION) 115 mA, 5 PIN RELAY
- spade terminal relay. OR DO I NEED AN ENCLOSED POWER RELAY DPST-NO 25
AMPS 12 VDC 158 mA (STANDARD WITH DC INPUT VOLTAGE) CAN YOU PEOPLE HELP
ME MAKE THIS FLY?

 

[Michael]

Tim Shoppa wrote:

I've heard much talk over the past decade in s.e.d of the Philips-made
74HC9046 improvement on the 74HC4046 PLL, but my favorite web search
tools come up quite empty when trying to find the datasheet or a
distributor. The www.semiconductors.philips.com website is
phenomenally unusable, but if someone can ferret out the URL for a PDF
of the datasheet I'd appreciate it.

Tim.

<http://www.datasheetarchive.com/search.php?search=74HC4046&sType=part>

 

[pedro]

try this url and search the logos there
http://www.elnec.com/iclogos.php
Herb T <oth3ll0@hotmail.com> wrote in message
news:1113584232.677425.189980@z14g2000cwz.googlegroups.com...

I'm trying to identify a small 0.4 mm x 0.4 mm 6-pin DIP IC chip that
has two rows of part numbers written on it. 493, 328T, and a symbol
"o----" (round dot with a solid line above it, like a musical note
rotated 90 degrees . Anyway its package has a ceramic base with
silver/steel cap and a gold outline. The board has an antenna and a PIC
processor, but the part doesnt seem to be directly connected to either
of these components based on probing. I did notice 1.5 V input on pin 2
(I think). It's a low power component, and the whole board fits in the
palm of your hand. Some have suggested a crystal filter, but I can't
find any data sheet that reflects the numbers written on this IC. I've
tried googling, but the results weren't useful. Any ideas what it is,
or where I ought to look?
Thanks,
Herb

 

[Mike Harrison]

On 22 Apr 2005 02:09:48 -0700, werner_verdickt@hotmail.com (Werner) wrote:

I am looking for a compatible IC for a Holtek HT7713B. Seems like
Siemens made SLB0586/0587 ICs, but are these the compatible ones ?

Does anyone know where I can find a data sheet for the HT7713B?

http://www.alldatasheet.com/

 

[Mike Harrison]

On Thu, 21 Apr 2005 21:22:34 -0400, "pedro" <pperesNO@SPAMsympatico.ca> wrote:

try this url and search the logos there
http://www.elnec.com/iclogos.php
Herb T <oth3ll0@hotmail.com> wrote in message
news:1113584232.677425.189980@z14g2000cwz.googlegroups.com...
I'm trying to identify a small 0.4 mm x 0.4 mm 6-pin DIP IC chip that
has two rows of part numbers written on it. 493, 328T, and a symbol
"o----" (round dot with a solid line above it, like a musical note
rotated 90 degrees . Anyway its package has a ceramic base with
silver/steel cap and a gold outline. The board has an antenna and a PIC
processor, but the part doesnt seem to be directly connected to either
of these components based on probing. I did notice 1.5 V input on pin 2
(I think). It's a low power component, and the whole board fits in the
palm of your hand. Some have suggested a crystal filter, but I can't
find any data sheet that reflects the numbers written on this IC. I've
tried googling, but the results weren't useful. Any ideas what it is,
or where I ought to look?
Thanks,
Herb


Sounds like a SAW resonator -as used in car-alarm keyfobs etc.

 

[Gustavo]

Right now, I'm building a WWVB receiver for my University Thesis
Project. I've looked around quite a lot and it's hard to find any
chips on sale. I tried to contact the ATMEL people, but they said the
chip was obsolete. Then I tried with Evox-Rifa (the north american
distribuitor of MicroAnalogSystems) and asked for some chips, they
say that they only had for production (big quantities) but they sent
me two samples of their MAS9180 receiver chip. It is good to projects
due to it comes in SDBIL package not as SMT device. Just do some
research on the MAS9180 and you will find some information.
Another site were i found a LOT of components and they were very
heedful when you ask for some samples. There i asked for 5 of their
CM6005 receiver (very similar to the MAS9180, but in SMT package), 3
- 60Khz pretunned antennas and 3 - 60Khz xtals. And I had the devices
on my hands 1 week after that, from Germany. The web page is
www.c-maxgroup.com. You can order samples and the best of all...
FREE.
I'm using the MAS9180 receiver with the antennas and the xtal from
c-max.
Right now my main problem is to decode the signal. I want to acquire
the signal via the parallel port, and Im doing the software in
assembly to use and old PII CPU for the project.