HDTenEightyP/NetNews huggingface dataset:
From: wilkens%nmr@venus.ycc.yale.edu (Ken Wilkens)
Newsgroups: sci.electronics
Subject: Re: police laser radar
Date: 18 Nov 92 13:24:06 GMT
     <Nov16.225043.36767@yuma.ACNS.ColoState.EDU>
Organization: Yale University
X-Useragent: Nuntius v1.1a2

Well I was thinking about putting laser diodes on the front of my car
also soon as I found what wavelength the operate at. I don't think it
would take much power to foul the lidar as it uses reflected power which
should be alot less than you would be broadcasting. As for the legal
issue, it is illegal to jam radio this is light so don't see what the FCC
could say about it! :) And being in the infered region you cant see it so
just diguise the the diodes behind parking lights or in headlight bezels
and such so they can't be seen!

Ken
From: svaldez@sdcc13.ucsd.edu (@ocf.berkeley.edu  )
Newsgroups: sci.electronics
Subject: does dbuV = uV ???
Date: 20 Nov 92 02:44:06 GMT

Plain and simple the subject line sez it all...

svaldez@sdcc13.ucsd.edu
svaldez@ocf.berkeley.edu
From: slmdj@cc.usu.edu
Newsgroups: sci.electronics
Subject: Mail order succes story
Date: 17 Nov 92 10:03:24 MDT
Organization: Utah State University

In article <iowauB1w165w@vector0.SAC.CA.US>, jon@vector0.SAC.CA.US  (Dazed N. Confused) writes:
> 
>> In article <BxBzJK.BqK@news.udel.edu> bew@brahms.udel.edu (Ben Williams) writ
>> 
>>    I've just read this thread containing 50+ complaints about Radio Shack.
>>    What I would like to know is:  Why do we have to shop at RS to get
>>    electronic supplies?
> 
> 
>      Let's have a list of good mail-order companies.  I know several
> people around here have experience with many different companies
> (actually--wasn't there a list a looong time ago?)
> 
>      I've only tried DigiKey and I've been happy.  25$ minimum order.
> 1-800-DIGI-KEY.
> 
> --Jon
> 
>    jon@vector0.SAC.CA.US                     Life is like a kiwi.
>    citrus.SAC.CA.US!vector0!jon
> 


Personally, the mail-order company I have had the best success with is 
All Electronics Corp. in Van Nuys California, I believe (I don't have one of
their catalogs sitting in front of me...)
They have provided excellent service, _very_ reasonable prices ($10 min. order,
$3.00 ships the order) and a very good selection of components, equipment, 
etc...

Paul Cowley
slmdj@cc.usu.edu
EE Undergrad Extrordinaire


Newsgroups: sci.electronics
From: kingpin@mole.gnu.ai.mit.edu (Joe Smooth)
Subject: For Sale: EPROMs
Organization: None
Distribution: sci
Date: Wed, 18 Nov 1992 23:35:09 GMT

I have the following EPROMs for sale:

	31 Amdek 27C512 200nS - $2 / each

	90 Intel 27512 250nS - $1.50 /each

I will sell in quantities more than 10, so if you are interested,
reply to me, and maybe we can work something out..

From what I know, they all work, but if, for some reason, one doesn't,
I will replace it.. 

	Thanks!

			- Joe
Newsgroups: sci.electronics
From: dag@col.hp.com (David Geiser)
Subject: Re: Using big caps as computer power supply filters (?)
Date: Thu, 19 Nov 1992 15:39:33 GMT
Organization: HP Colorado Springs Division

wlsmith@valve.heart.rri.uwo.ca (Wayne Smith) writes:
>            I would think that cap's that big would provide maybe 1
> second of backup power.  

What will you gain with 1 sec of backup power?  Does your 'puter
and OS have a _graceful_ save and shutdown on power fail mode or
does it just crash?  I wouldn't expect anything graceful from a
DOS machine.

Problems you might have:  inrush current at power-on may smoke
your surge protectors, time constant for "power supply stable"
signal may be too small with huge caps.

If you want to add something that will help your 'puter survive a
few cycles of line drop-out, try a ferro-resonant transformer.

dag
"If you want to get rid of those caps, advertise in alt.pyrotechnics"
-- 

 To the cat, the experimenter is problematic.
From: v064mcqs@ubvmsb.cc.buffalo.edu (NEIL GANDLER)
Newsgroups: sci.electronics
Subject: Pinouts of the LM393 Dual-Op amp
Date: 23 Nov 92 04:42:00 GMT
Organization: University at Buffalo
News-Software: VAX/VMS VNEWS 1.41


 Are the pinouts for the LM393 Low power dual Comparator the same
as the 1458 and can the 1458 be substitued for the 393 since they
are somewhat cheaper. Im using them in a product that I plan to market.

		Neil Gandler
From: baden@inqmind.bison.mb.ca (Baden de Bari)
Newsgroups: sci.electronics
Subject: Re: Dipol Simulation wanted!
Date: Sat, 21 Nov 92 01:22:14 CST
Organization: The Inquiring Mind BBS  1 204 488-1607

uteca042@unibi.hrz.uni-bielefeld.de (0116) writes:

> I need some stuff about programming a Simulation of a Dipol radiation
> from Heinrich Hertz. It is very important for a friend of mine (electric
> engineer). I know that I got a 3D Simulation from a ftp server along time
> ago, but I deleted it because I had no use for it. Knows anybody where I
> can get it once again? I would very pleased if someone send me email about it
> 
> Send to
> uteca042@unibi.hrz.uni-bielefeld.de
> 
> 

 
        I too would appreciate such information if someone could attain 
it, esp relating to vector graphics, etc, and PASCAL routines.
 
                Thanks.
        >>Baden<<


baden@inqmind.bison.mb.ca
The Inquiring Mind BBS, Winnipeg, Manitoba  204 488-1607
From: jorgense@plains.NoDak.edu (Lee A. Jorgensen)
Newsgroups: sci.electronics
Subject: Voltage Doubling ... DC
Summary: PLEASE help ...
Date: 22 Nov 92 18:26:33 GMT
Organization: North Dakota Higher Education Computing Network

I need information on how to double DC voltage.  I did have an idea
for doing this, but the idea involved converting the DC voltage to
pulsating DC and then stepping it up, then convert that back to DC.
 
However, my process is less than perfect, and would weigh a bit more
than a solid-state device(s) to do the same thing.

Could someone please either point me in the right direction, or send
me a schematic ...

THANKS ...

-Lee.

-- 
Lee Jorgensen             Internet: jorgense@plains.NoDak.edu
-------------------------------------------------------------
   Sorry, but the rest of this .signature is out of order.
               Sorry for the inconvenience.
From: rp@cns.nyu.edu (Robert Picardi)
Newsgroups: sci.electronics
Subject: Re: Using big caps as computer power supply fi
Date: 17 Nov 92 19:11:09 GMT
Reply-To: rp@cns.nyu.edu
Distribution: na
Organization: New York University

In article 29174@julian.uwo.ca, wlsmith@valve.heart.rri.uwo.ca (Wayne Smith) writes:
> I've got some big electrolytic caps (20000 to 60000 uf, 16 to 40 volts),
> and I was thinking of putting them across the 5V and 12V power supplies
> in my pc.  I would think that cap's that big would provide maybe 1
> second of backup power.  Should I use some inductors or smaller
> caps with these big guys (to make them safer), or are they pretty reliable
> on their own (I wouldn't want them exploding inside my pc).  :)


Not a good idea... they look like a short circuit to your power supply at
turn-on. 
Newsgroups: sci.electronics
From: medin@catbyte.b30.ingr.com (Dave Medin)
Subject: Re: Anti-shoplifting devices and magnetic media
Reply-To: medin@catbyte.b30.ingr.com
Organization: Intergraph Corporation, Huntsville AL
Date: Wed, 18 Nov 1992 18:28:13 GMT

In article <Bxw8IL.G95@wang.com>, dbushong@wang.com (Dave Bushong) writes:
|> bdenckla@husc10.harvard.edu (Benjamin Denckla) writes:
|> 
|> >This morning I walked in and out of a number of shops with
|> >anti-shoplifting detectors similar to the security devices they have in
|> >libraries, i.e. two vertical inverted U-shaped bars on either side of the
|> >exit.  Then I found that the disk I had been carrying had some errors on
|> >it which were not there beforehand.  I assume that this is some kind of a
|> >detector for non-demagnetized, i.e. not bought merchandise.  I have heard
|> >that the demagnetizing pads on the check out-counter will erase credit
|> >cards so I try to stay away from them.  But can anyone tell me if my disk
|> >could have been damaged by the detectors?  Also, how far away should I
|> >keep magnetic media like disks, credit cards, and DAT's from the
|> >demagnetizing check out counter pad?  is a foot enough?  If anyone could
|> >help I would really appreciate this as this is a very scary situation,
|> >especially without information as to exactly how scared I should be.

|> Take your tour again, but this time with a pocket compass.  If it
|> doesn't violently react to the devices, the diskette is probably
|> safe.  By the way, the reaction I was talking about is one which,
|> if the compass could talk, it would say boinnnnggggggg!  Normally
|> the disk would have to be close to the magnet to affect it; or the
|> magnet would have to be strong enough where you would feel the pull
|> on your car keys in your pocket.

Unless, of course, the field were alternating (which they probably are
to detect a hysteresis change in the anti-theft material), when the compass
wouldn't do you a bit of good.

Hold a piece of steel or a small magnet up against the detector. On the
chance that the frequency is in the audio range, does it buzz? BTW,
most keys are brass, not steel, so they can be cut easily, and would
not make good detectors.

Being that magnetic fields decline as the cube of distance, I would
doubt that they were at fault in corrupting your disk unless you
rubbed up against a detector.

I saw a demag pad at my local Wal-Mart where the notice, yet
unremoved, said to keep credit cards more than 6" away.

-- 
--------------------------------------------------------------------
       Dave Medin			Phone:	(205) 730-3169 (w)
    SSD--Networking				(205) 837-1174 (h)
    Intergraph Corp.
       M/S GD3004 		Internet: medin@catbyte.b30.ingr.com
  Huntsville, AL 35894		UUCP:  ...uunet!ingr!b30!catbyte!medin

   ******* Everywhere You Look (at least around my office) *******

 * The opinions expressed here are mine (or those of my machine)
From: vengrov@bimacs.BITNET (Vengrover David)
Newsgroups: sci.electronics
Subject: DATA FOR I.C.
Date: 15 Nov 92 14:15:04 GMT
Reply-To: vengrov@bimacs.UUCP (Vengrover David)
Organization: Bar-Ilan University, Israel.


i'm looking for data of The integrated circuit  M51308SP
this I.C. is used in the T.V. sanyo Model CEP 3011V-00

I'm looking for that information in order to change
the vertical oscillator in the I.C. from 50 c/s to 60 c/s.

any given help will be blessed.


  DAVID

                      E-mail : vengrov@bimacs.cs.biu.ac.il
From: gleason@mwk.uucp
Newsgroups: sci.electronics
Subject: Format of transmitted data on IBM remotes
Date: 19 Nov 92 23:04:50 CST
Organization: M. W. Kellogg, Houston TX



  Does anyone hae any specs on the format of the data transmissions
that IBM sends to those little terminals that their field service
people carry? 

Lee K. Gleason N5ZMR
Control-G Consultants
gleason@mwk.uucp
From: birmingh@fnalnd.fnal.gov (Phillip J. Birmingham)
Newsgroups: sci.electronics
Subject: Re: How can a radar detector bedetected?
Date: 20 Nov 92 03:56:21 -0600
Organization: Blackriver Recorporations, Inc.
NNTP-Posting-Host: fnalnd.fnal.gov

In article <18NOV92.13820140.0036@music.mus.polymtl.ca>, CT64@music.mus.polymtl.ca (Nicolas Gauvin) writes:
> A friend of mine recently got arrested because he was using a radar
> detector. The cops actually used some kind of device to detect its
> radar detector. How is this possible? Isn't a radar detector something
> that only receives but emits nothing?
> 
> 
>                         Nicolas Gauvin
>                         gauvinn@info.polymtl.ca

         Most sensitive radio/radar receivers use the superheterodyne
    principle, where you mix the received signal with a signal of a known
    frequency. This requires a local oscillator, which emits RF that can be
    detected. This is the reason that you may not use radios on airliners;
    the airline is afraid that the local oscillator will screw up the
    navigation instruments.

-- 
 Phillip J. Birmingham   birmingh@fnal.fnal.gov  
 I don't speak for Fermilab, although my mouth is probably big enough...
From: 8809787l@levels.unisa.edu.au
Newsgroups: sci.electronics
Subject: RANDOM GENERATOR needed for digital testing
Date: 11 Nov 92 14:25:30 GMT
Organization: University of South Australia

Dear friends 

I was just wondering if any one could provide me with some info on the
construction of PSEUDORANDOM generators and also how one can construct weighted
generators of this nature so that the probability of 1's or 0's occuring could
be changed.

thank you very much for your time.

peyam pourbeik

8809787L@LV.LEVELS.UNISA.EDU.AU
Newsgroups: sci.electronics
From: schuch@phx.mcd.mot.com (John Schuch)
Subject: How to post DTMF circuit
Organization: Motorola Computer Group, Tempe, Az.
Date: Sat, 21 Nov 1992 16:22:38 GMT

OK, I managed to get the DTMF circuit into a postscript file. Now,
do I post the 24K file directly, post a zipped/uuencoded version, or
Email the thing on request? I'll leave it to the consensus of the net.

John


-- 
| ONE LINE NOVEL: She backed away from the corpse slowly, not so much out  |
| of fear, but simply unsure of what the crowd expected her to do with it. |
+--------------------------------------------------------------------------+
| John R. Schuch  -  Motorola Computer Group  -  Manufacturing Engineering |
Newsgroups: sci.electronics
From: brewster@sscvx1.ssc.gov
Subject: spice simulator
Organization: Superconducting Super Collider Laboratory
Date: Fri, 20 Nov 1992 17:26:12 GMT

Has anyone heard of a SPICE type simulator available on the MACINTOSH.  If so
which is a known best.  Please E-mail me at "BREWSTER@SSCVX1.SSC.GOV" if you
have an answer.  Thanks in advance.  Bill Brewster
From: tgamble@cimage.com (Rick Campbell /10000)
Newsgroups: sci.electronics
Subject: Re: Request for information about the 6502 microprocessor
Date: 16 Nov 92 13:31:25 GMT
Organization: Cimage Corp, Ann Arbor, MI
X-Newsreader: Tin 1.1 PL5

Mark James Collier (mjcol@dcs.warwick.ac.uk) wrote:
: Does anybody know how I can get as much information as exists about the
: 6502 microprocessor? For my third year project I am emulating the 6502 at the
: cycle level, ie via its internal registers. Thus I need to know information
: not normally included in programming texts. Can anybody recommend a book
: (eg what is Rodney Zak's 'Programming the 6502' like?) or provide an e-mail
: address for RockWell (or the designers of the chip, if not them)?
: 

A few years back I worked with the Commodore VIC-20. This computer contains a
6502, and the information included in some of the many programming books was
pretty detailed. The computer also came with a complete schematic, including
all the support chips. I have seen these computers in the paper for as little
as $20. 


-- 
 Rick Campbell  
 Internet: gamble@cimage.com
     -or-: emunix.emich.edu!rc3502
From: miller@hmsp04.wg3.waii.com (Griff Miller X7114)
Newsgroups: sci.electronics
Subject: Old phone
Date: 18 Nov 92 18:36:34 GMT
Distribution: usa
Organization: Western Geo. - Div of Western Atlas Intn'l Inc., Houston, TX
Originator: miller@hmsp04.wg3.waii.com

I have an old telephone (circa 1963, from the dates stamped inside) that works
in every way except that it doesn't ring when someone calls in. Sort of like
the ringer is turned down, but I checked that, of course.

Surely the wiring has changed since then - I understand that there used to be
3 wires/line and now there's 2 wires/line. Maybe with a little redirection
of the internal wiring I can get the ringer to work?

This thing would go great in the garage, but I need to know when it's ringing.
--
Griff Miller - miller@monarch.wg3.waii.com
My opinions are mine, not Western's.
"The fear of the Lord is the beginning of knowledge, but 
fools despise wisdom and discipline."   - Proverbs 1:7
From: burtt@cycvax.nscl.msu.edu (BRIAN BURTT)
Newsgroups: sci.electronics
Subject: Re: Request for information about the 6502 microprocessor
Date: 22 Nov 92 19:43:00 GMT
Organization: NSCL Michigan State University
News-Software: VAX/VMS VNEWS 1.41

In article <1992Nov17.025345.4949@njitgw.njit.edu>, dcg5662@hertz.njit.edu (Dave Grabowski (KxiK)) writes...
>In article <1992Nov16.133125.461@cimage.com> tgamble@cimage.com (Rick Campbell /10000) writes:
>>Mark James Collier (mjcol@dcs.warwick.ac.uk) wrote:
>>: Does anybody know how I can get as much information as exists about the
>>: 6502 microprocessor? For my third year project I am emulating the 6502 at the
>>: cycle level, ie via its internal registers. Thus I need to know information
>>: not normally included in programming texts. Can anybody recommend a book
>>: (eg what is Rodney Zak's 'Programming the 6502' like?) or provide an e-mail
>>: address for RockWell (or the designers of the chip, if not them)?
>>: 
>>

	Zak's book is good as a non-platform specific reference, which sounds
like just what you want.  It requires some ML background to really 
appreciate, but it sounds like you have that.
	The 6502, 6502b and 65c02, i.e. the Apple 2 chips, were made
by Synertek.  I couldn't tell you how to contact them, or even if they still
exist.

--Brian Burtt
Undergraduate major in electrical engineering 
Michigan State University
burtt@lynch.nscl.msu.edu
Newsgroups: sci.electronics
From: schuster@panix.com (Michael Schuster)
Subject: Re: How can a radar detector bedetected?
Date: Fri, 20 Nov 1992 18:15:58 GMT
Organization: PANIX Public Access Unix & Internet, NYC

In article <18NOV92.13820140.0036@music.mus.polymtl.ca> CT64@music.mus.polymtl.ca (Nicolas Gauvin) writes:
>A friend of mine recently got arrested because he was using a radar
>detector. The cops actually used some kind of device to detect its
>radar detector. How is this possible? Isn't a radar detector something
>that only receives but emits nothing?

Like all superhet receivers, a radar detector has a local oscillator.
This emits a weak radio signal which the radar detector detectors pick up.


-- 
_______________________________Mike Schuster________________________________
NY Pub. Access UNIX/Internet: schuster@panix.com | 70346.1745@CompuServe.COM
The Portal (R) System: schuster@shell.portal.com | MCI Mail,GEnie: MSCHUSTER
Newsgroups: sci.electronics
From: tod@cco.caltech.edu (Tod Edward Kurt)
Newsgroups: sci.electronics
Subject: Servo Controller Chips? (NE554, XR2264, etc)
Date: 21 Nov 1992 21:54:06 GMT
Organization: California Institute of Technology, Pasadena
NNTP-Posting-Host: sandman.caltech.edu
Keywords: Servo, PWM, motor control


Hi all,

	Does any one know of a source for Servo Control ICs?  Signetics used
to make one --the NE554-- and Exar used to make three -- the XR2264, 65, 66.
These parts have been outdated and discontinued, but if anyone knows of 
replacements or other chips, please let me know.  I've called both Signetics
and Exar.  Neither produces a modern replacement.

						-Tod
tod@sandman.caltech.edu
tkurt@vlsi.caltech.edu
From: EAO102@psuvm.psu.edu (Ernie Oporto)
Newsgroups: sci.electronics
Subject: RE: Help with refresh/record scheme needed!
Date: 21 Nov 92 22:45:52 GMT
Organization: The Pennylvania State University

>Its a long time since I played with DRAMS, but I would think that with
>a bit of judicious programming you may be able to avoid a refresh
>circuit. As long as you access all rows (columns?) within 4 ms the ram
>gets refreshed, so while you're recording you'll be refreshing anyway,
>ditto for playback. The rest of the time you could possibly arrange an
>interrupt routine every 4 mS to just read the necessary number of
>addresses if you can't build it into your program. If this is all B.S.
>then someone please say so :)

Well, that's the problem.  To record properly, I need to access all rows
in 8 seconds, though I suppose with fast enough clocking, I can access
all the rows in between the recorded bit cycles.  It will take 8 seconds
to fill the 256Kb x 8-bit memory at 32kHz sampling.  BTW, the circuit is
going to be self-contained, so no computer will be hooked up to it for
software programming.  What I see happening is that after 4ms of recorded
message, the first set of 4ms will erase as the second 4ms records.

---
"No time to sleep, so I've lost all my dreams"  --Metal Church
  _____)           ______        _)       _)  EAO102@PSUVM.PSU.EDU
                               __       __    OPORTO@CORVETTE.ECE.PSU.EDU
______    ______            ___      ___      Ernie "SHOKK" Oporto
                               __       __    Computer Lab Attendant
(_______ _      _ ________ _     _) _     _)  for PSU's CAC Department
Newsgroups: sci.electronics
From: mcovingt@aisun3.ai.uga.edu (Michael Covington)
Subject: Re: Joystick to PC connections
Organization: AI Programs, University of Georgia, Athens
Date: Tue, 17 Nov 1992 04:41:56 GMT

Go to the library and find PC Tech Journal for about 1985 or 1986.
In it you'll find an article called "Joystick Metrics" that tells you
not only how to build a joystick, but also how to build a game port
voltmeter, a game port thermometer, and a number of other interesting things.

-- 
:-  Michael A. Covington     internet mcovingt@uga.cc.uga.edu 
:-  Artificial Intelligence Programs       phone 706 542-0358
:-  The University of Georgia                fax 706 542-0349
:-  Athens, Georgia 30602-7415 U.S.A.     amateur radio N4TMI
Newsgroups: sci.electronics
From: markz@ssc.com (Mark Zenier)
Subject: Re: Help! Converting 2400 to 9600 baud.
Organization: SSC, Inc.,  Seattle, WA
Date: Mon, 23 Nov 1992 20:07:46 GMT
X-Newsreader: TIN [version 1.1 PL6]

Paula Stockholm (paula@nlbbs.UUCP) wrote:
:         Back when I had time to do a load of laundry while downloading a
:         file; I, too, was intrigued by this "legend".
: 
:         When I finally got a 9600, one look at it's complexity told me
:         that the 2400 to 9600 tale was a lot of hooey.

There is some basis in fact for the upgrade.  Some chip manufacturers
came out with upgraded chip sets for their 2400 baud modems to
also be 9600 baud FAX modems.   

But the problems are.  

1. What the heck do you do with a FAX modem. ;-)
 
2. You have to have an upgradeable chipset in your current modem.
 (out of a dozen or two that are used)
 
3. You have to find a distributor who sells the chipset.  Remember that
 the modem market consists of a small number of manufacturers with
 high volume buying, and no distributor is going to stock something
 that's not going to turn over, or is going to sell it with a HIGH 
 markup.  And the chipset manufacturers are niche companies like
 Silicon Systems that aren't as available as some of the big outfits.
 
4. You have to be adept enought in electronics to swap the chips.  
 (I can thing of better things to use to learn how to surface
 mount solder with than (an estimated) $30 worth of semicondutors.)
 
5. In the US, It's against FCC regulations to work on your modem.  
 The manufacturer has to do that.

Mark Zenier  markz@ssc.wa.com  

Newsgroups: sci.electronics,rec.audio
From: hb@imsor.dth.dk (Henrik Bechmann)
Newsgroups: sci.electronics,rec.audio.car,alt.locksmithing
Subject: Gemini 4002/4003 car alarm
Date: 20 Nov 92 13:07:32 GMT
Organization: UNI-C, Danish Computing Centre for Research and Education

I have one of those fitted in my car, and the users manual states that
it is possible to switch between voltage sensing mode and no voltage
sensing mode by setting a switch. I don't want it to be voltage
sensing, but the alarm reacts on voltage changes in both modes :-( 

Does anybody out there have any suggestions to solve the problem
(without a separate battery for the alarm), or does anybody have acces
to a Service Manual or an electronics diagram of the thing?

Any help will be very much apreciated.

Henrik.
--
-----------------------
! Henrik Bechmann     !
! hb@vip.imsor.dth.dk !
-----------------------