HDTenEightyP/NetNews huggingface dataset:
From: larryc@shell.portal.com (Larry WB Ching)
Subject: SCI.ELECTRONICS Phone fraud !!!
Summary: A recent attempt to rip-off sci.electronics correspondents. 
Keywords: fraud, con artists, phone numbers 
Organization: Portal Communications Company -- 408/973-9111 (voice) 408/973-8091 (data)
Distribution: sci.electronics
Date: Fri, 1 Jan 1993 23:16:23 GMT



 At about 6PM thursday evening, I got a phone call. The operator said that 
he had a collect call to me from Charles Pooley in New York. The name was
familiar, but I didn't remember exactly why. I said I would accept the call,
but then the "operator" said the call couldn't get through because I had
the call collect option blocked. He then said he could pass the call
through if I gave him my calling card number. I said that I'd rather call 
Mr. Pooley myself, and could the "operator" give me Mr. Pooley's number.
There was a pause, then a phone number with a San Jose area code! It didn't
occur to me until later that , if the call was from New York, why was
the call-from number (408)!??!

 I remembered that Charles & I had been corresponding on a topic from 
sci.electronics. I was lucky enough to have an old message from him lying 
around, and emailed him a message about my mysterious phone call. 

 Charles Pooley replyed to me today - turns out the guy tried the same scam
on him too! But this time, the bogus operator said the collect call was
from me to Charles! Charles was also wary, and didn't give the crook his
calling card number.

 So - WATCH OUT! How this con artist chose my name & Charles' to try is 
beyond me. As far as public postings in sci.electronics, I don't think
Charles and I had exchanged more than four public postings. Most of
our correspondence has been via "private" email. 

 This has definitely raised my paranoia level. If, out of the millions of 
public postings during 1992, someone should choose two correspondents
who have exchange only a slight amount of messages.... I mean , why us?
Or, is there a "boilerroom" operation going on, with a bunch of phony
operators, armed with USENET listings - calling people with this con?

 OH! - I may have put my phone number in one of my public sci.electronics
postings - that's probably how the scamsters make their selection. Makes
sense...

 				CHILDREN BEWARE!!!

		Larry "No, you don't need my stinkin' number!!!" Ching
			larryc@shell.portal.com

 
Newsgroups: sci.electronics,sci.energy,rec.autos
From: sbradley@scic.intel.com (Seth "Gimpy" Bradley)
Subject: Re: Flyin' Flywheels
Organization: Intel Corporation
Date: Sat, 26 Dec 1992 23:53:29 GMT

In article <1992Dec26.083859.15101@klic.rain.com> keithl@klic.rain.com (Keith Lofstrom) writes:
>I'm not holding my breath.  If they try and build the real thing without
>adequate containment, they will probably just kill themselves.  "Think of
>it as evolution in action."

Just thought I'd mention that I once saw a diagram of a bus in limited
use in Europe that uses a flywheel as secondary storage. The flywheel
is accelerated during braking, and its momentum is used to accelerate the
vehicle when it resumes travel.  I believe that the primary fuel was
hydrogen or LPG.  The flywheel arrangement was employed to reduce fuel
consumption.
-- 
Seth J. Bradley, Senior System Administrator, Intel SCIC
Internet: sbradley@scic.intel.com   UUCP: uunet!scic.intel.com!sbradley
----------------------------------------
"A system admin's life is a sorry one.  The only advantage he has over
Emergency Room doctors is that malpractice suits are rare.  On the other
hand, ER doctors never have to deal with patients installing new versions
of their own innards!"  -Michael O'Brien
Newsgroups: sci.electronics
From: kehoe@netcom.com (Thomas David Kehoe)
Subject: Re: Clocks
Organization: Netcom - Online Communication Services (408 241-9760 guest)
Date: Mon, 28 Dec 1992 19:41:41 GMT


I have a different clock problem...when using bucket brigade
devices (BBDs), the clock frequency is twice the sampling
frequency.  Is there a way to make the clock frequency
four or eight times the sampling frequency?

I was thinking that a counter might do it.  To get the
length of delay I want, the clock runs under 20KHz, so
I can hear it through the BBD output.  Now I'm using
a pair of RC low-pass filters, which gets rid of the
clock sound, but also most of the high end.  The active
filters I tried weren't any better.  I looked at 
active filter chips (CCDs, I think), but they were
$25 each, or so.  I'd pay up to $5-10 for one.
-- 
"Why my thoughts are my own, when they are in, but when they are out
they are another's." - Susannah Martin, hanged for witchcraft, 1692.
Thomas David Kehoe          kehoe@netcom.com         (408) 354-5926
Newsgroups: sci.electronics
Subject: Automatic filmstrip projectors
From: kevin@netlink.cts.com (Kevin Dorne)
Date: Wed, 30 Dec 92 12:10:26 PST
Organization: NetLink Online Communications, San Diego CA

Does anyone know the frequency that is recorded on cassettes to change 
the
frame in automatic filmstrip projectors?  If you do, PLEASE send me mail.
It would also be helpful if anyone knows how to generate this tone on an
Amiga computer. Thanks in advance.

kevin@pro-nbs.cts.com (preferably) or kevin@Netlink.cts.com

--                    
INTERNET:  kevin@netlink.cts.com (Kevin Dorne)
UUCP:   ...!ryptyde!netlink!kevin
NetLink Online Communications * Public Access in San Diego, CA (619) 453-1115
Newsgroups: sci.electronics
From: mikolaje@ccrs.emr.ca (Ken Mikolajek)
Subject: Re: 486DX2 Crystals
Organization: Canada Centre for Remote Sensing, Ottawa
Date: Wed, 23 Dec 1992 16:01:59 GMT

In article <1992Dec16.011918.25341@eng.ufl.edu> iqbal@omaha.eel.ufl.edu (M.Iqbal) writes:
>In article <1992Dec12.003507.1@research.ptt.nl>, walvdrk_r@research.ptt.nl (Kees van der Wal) writes:
>|> In article <1g4ul8INN2em@violet.csv.warwick.ac.uk>, esrej@csv.warwick.ac.uk (Mr
>|> L A J Davis) writes: 
>|> 
>|> > I purchased a 486 motherboard fitted with a 486DX2 50MHz cpu. Unfortunately
>|> > ... stuff deleted
>
>Square wave have infinte number of frequencies: a fact explained in 
>any introductory communication book. If you do not believe me than 
>try finding Fourier Transform of a pulse train or see a specturm
>of a pulse train on a spectrum analyzer. 

Actually I was under the impression that a square wave only had
odd harminics. That's what we see in communications  and
signal processing textbooks.

>
>Anyways, one should be able see that square wave have harmonics all over 
>the frequency band. What CPU is doing is picking up a harmonic of the input
>clock frequecny. Therefore, second harmonic of 25 mhz is 50 mhz and similarly
>second harmonic of 33 mhz is 66 mhz. Usually, a CPU has a Phase lock loop
>to lock on the second harmonic of the clock frequency; thus, running 
>the internal circuitry of the porcessor at 50 or 66 mhz. One can, however,
>pick up second harmonic by using a filter, but, it is much easier to build 
>a Phase lock loop on a silicon wafer than passive components like R, L, 
>and C.

I seems far mor likely they are using both edges of the clock to generate
a frequency doubled clock. The optimum duty cycle with a high performance
VLSI device is seldom %50 so a PLL approach probably wouldn't be
suitable anyways.

Ken Mikolajek.
mikolaje@ccrs.emr.ca
From: bhertz@terapin.com (Ben Hertz)
Newsgroups: sci.electronics
Subject: Printed Circuit generating Software?
Date: 2 Jan 93 23:02:32 PST
Organization: BBS

        Hi everyone.  I'm a high school student who's interested in
electronics.  I enjoy building little circuits and reading all the stuff in
this conference that I know absolutely nothing about.  
        After seeing some new "iron-on" sheets for making P.C. boards
advertised in several catalogs I began considering generating my own boards. 
What I'm looking for is a Shareware, or relatively cheap program that will
generate patterns for me.  There is a review of such a program in the May
edition of Computer Craft, but after reading it over I'm not so sure if it does
what I originally thought it did.  I am hoping for a program which I tell what
I need connected to what other things, and it spits out a pattern. Maybe that's
too much too ask, I don't know.
        Anyway, if someone out there knows of a shareware program that creates
Printed Circuit patterns, or where I could get one, I'd like to hear from them.
 Thanks.

P.S.  Anyone know how many people are connected to this conference?

                         Ben Hertz (bhertz.terapin.com)
                         Richmond, California
From: mikael@terapin.com (Mikael Andersson)
Newsgroups: sci.electronics
Subject: Where can i find a cheap GAL programmer?
Date: 1 Jan 93 05:13:39 PST
Organization: BBS

I would like to buy a GAL chip programmer but are there no cheap but good
ones on the market? I don't want to spend $400-$800 for a programmer or 
is there anybody who has a GAL programmer for sale?
 
Mikael
Newsgroups: sci.electronics
From: wrb@cbnews.cb.att.com (wallace.r.blackburn)
Subject: Re: help needed building water level sensor
Organization: AT&T
Distribution: usa
Date: Tue, 29 Dec 1992 17:52:43 GMT

In article <1hq0ilINNbji@fnnews.fnal.gov> behnke@FNALF.FNAL.GOV writes:
>In article <00965764.D96DDB80@Msu.oscs.montana.edu>, uchrgrh@Msu.oscs.montana.edu writes:
>>I would like to build a solid state device that would turn off a water
>>pump in my aquarium if the water level drops  below a certain level.
>>I am willing to look at prefabricated stuff but would prefer to build it
>>my self.
>
>Seems that a simple micro-switch attached to a float would work fine.  The float
>would be attached to the lever of the micro switch.  The pump motor is in series
>with the micro switch.  When the float level gets below a level YOU consider
>safe, the switch opens and stops the pump.  For a analogous system, take the
>cover off of the tank of your toilet and watch how the action works when you
>flush it.  If needed, one could get fancy and have an extra tank of fresh H2O.
>When the water level in the main tank drops below a specified level, a second
>pump is started to pump fresh water into the tank to keep the filter pump
>operating.
>
>Just an idea.
>
>Mike "This 24GB database will be the death of me" Behnke
>
>My opinions are my own, and MOST of them don't mean a thing !
>
>mb

HEY!!!!  That would be simple, functional, and reliable!  What the heck are
you trying to do here?!

I was going to answer this in a few weeks.  I wanted to get the results of
the modeling and reliability studies first.  Since I'm on the spot though,
I'll give the preliminaries.

First, for reliability, you definitely need multiple sensors.  Three
should be sufficient.  These will each be monitored by separate
microcontrollers and the results sent to a master contoller via a duplexed
serial link.  Some more work will have to be done to determine the optimal
protocol for the link and so on.  Most probably have to develop an entirely
new one.

The master controller will compare the results sent from the three
subsystems and determine whether the water level is within desired
parameters.  Periodically, the master controller will run diagnostics on
itself and each subsystem.  If any part of the system fails diagnostics, a
signal will be sent to a dial-out modem which will automatically call a
computer at another site.  Periodic "I'm alive" calls will also be made.
If a scheduled call is missed, the computer will assume the system is down
and initiate emergency response notices to appropriate people.

There is obviously still quite a bit of design to do here, but this is just
a start.  Any other ideas would be appreciated. ;)
Newsgroups: sci.electronics
From: jmorriso@ee.ubc.ca (John Paul Morrison)
Subject: Re: need some basic help with DIODES
Organization: University of BC, Electrical Engineering
Date: Fri, 1 Jan 1993 01:35:20 GMT

In article <1ht4krINN9kb@post.its.mcw.edu> kcb@post.its.mcw.edu (Kent C. Brodie) writes:
>
>A simple question.    Which way does the "band" on a diode go?  +/-?
>

which way does current in the diode go?
follow the arrow:



                                          \    |
                                           \   |
                                            \  |
                                             \ |
                                              \|
-----------------------------------------------|---------------------
                                              /|
                                             / |
                                            /  |
                                           /   |
                                          /    |


Or alternatively, what does the 'band' look like? Turn it on its side:

the band looks like              ------------------------
a big minus sign

>--------------
>Kent C. Brodie - Sr. Systems/Network Manager		brodie@post.its.mcw.edu
>Information Technology Systems
>Medical College of Wisconsin				(414) 257-8769


-- 
__________________________________________________________________________
 John Paul Morrison                     |  
 University of British Columbia, Canada |  
 Electrical Engineering                 |   .sig file without a cause
 jmorriso@ee.ubc.ca              VE7JPM |  
________________________________________|_________________________________
Xref: sparky sci.electronics:21476 sci.energy:6412 rec.autos:30409
From: jeh@cmkrnl.com
Newsgroups: sci.electronics
Subject: Re: lasers/collimated light
Date: 31 Dec 92 09:52:37 GMT
Distribution: sci
Organization: Kernel Mode Consulting, San Diego, CA

In article <199230.4265.27329@dosgate>, "glen mead" <glen.mead@canrem.com> writes:
> jeh@cmkrnl.com writes:
> 
> J >Disclaimer:  I'm into VMS and WinNT internals; lasers are an occasional 
> J >If you want an authoritative answer, ask on the laser hobbyists' mailing
> 
> Could you forward the subscription request address for the laser hobbyists
> mailing list?  Thanks in advance, take care.

Sigh.  Me and my big mouth.  The laser hobbyists' mailing list is a very small
affair and the moderator doesn't know whether the members want the increased
traffic that would come from publicizing it world-wide.  He is currently 
conducting a straw poll on the issue.  Stay tuned (and collimated :-).

	--- Jamie Hanrahan, Kernel Mode Consulting, San Diego CA
Internet:  jeh@cmkrnl.com, hanrahan@eisner.decus.org, or jeh@crash.cts.com
Uucp:  ...{crash,eisner,uunet}!cmkrnl!jeh
Newsgroups: sci.electronics
Subject: PC VGA screen extender circuit wanted.
From: rcooke@actrix.gen.nz (Russell Cooke)
Date: Tue, 22 Dec 1992 03:52:29 GMT
Organization: Actrix Information Exchange
Summary: PC to VGA screen 8 metre extender circuit

I need a circuit that will allow a VGA screen to be run up to 8 metres from a
PC, via twisted pair cable.

It will have to be powered from the keyboard connector (ie 0/+5v).

I would like to hear from anybody who has been there, done that.


Thanks in advance,

Newsgroups: sci.electronics,sci.energy,rec.autos
From: gary@ke4zv.uucp (Gary Coffman)
Subject: Re: Flywheel batteries as EV power source
Reply-To: gary@ke4zv.UUCP (Gary Coffman)
Organization: Destructive Testing Systems
Date: Fri, 25 Dec 1992 13:44:59 GMT

In article <1992Dec22.214616.27043@fcom.cc.utah.edu> bbarkey@lark.utah.edu (Brian Barkey) writes:
>In article <78564@ncratl.AtlantaGA.NCR.COM> mwilson@ncratl.AtlantaGA.NCR.COM (Mark Wilson) writes:
>>In <1992Dec21.193621.12001@microware.com> troyf@microware.com (Troy Frericks) writes:
>>
>>|>If I were a terrorist, I would drool at the thought of being able to
>>|>get such wonderful bombs so easily... All you'd have to do is arrange
>>|>for the vacuum valve to be opened on command or the magnetic bearing
>>|>to be turned off, etc.
>>|>
>>|>BOOM!
>>
>>|Modern composit materials, when used in a flywheel, will disintegrate
>>|with such a failuar.  This bomb would be about as wonderful as some
>>|fiber-glass insulation falling out of your attic.
>>
>>You haven't been listening have you?
>>It doesn't matter what form the flywheel takes after disintegration.
>>It could even turn into a gas or sub-atomic particles.  What causes the
>>BOOM is all of that kinetic energy being turned into heat.
>>
>	And gasoline isn't explosive? 
>	I may be mistaken but any power source capable of propelling
>	a ton or more at speeds greater than 50 mph for hundreds of 
>	miles must have a significant amount of energy in it. 
>
>	Brian Barkey	

You don't understand. The gasoline *does* contain the same amount of
energy as the flywheel, that's the whole point of the exercise. But
liquid gasoline can't explode. Only gasoline vapor properly mixed
with oxygen, 14:1 air/fuel ratio, can explode. When it's arranged
thusly it's called a FAE bomb. When the US dropped one during Desert
Storm, British troops radioed their headquarters and reported that
the "bloody yanks" were using nukes on the Iraqis. It's damned difficult
to get the proper mixture outside an engine, that's why there's all
that monkey motion with carburetors and fuel injectors. In a collision
that ruptures a gasoline tank and vaporizes a tiny amount of the gasoline
and ignites it, you get a fire that burns for half an hour or more as
the heat of the flames vaporizes more of the liquid gasoline. The mixing
with air is very inefficient and the resulting flames are very smokey
because of incomplete combustion, and not terribly hot. It's still hot 
enough to melt steel however.

Now with the flywheel failure, all the energy is released at once.
The only difference between a fire and an explosion is the *rate*
at which it occurs. This time the timescale is microseconds. You
wind up with an explosion that is about equivalent to 200 pounds
of dynamite. That's about what the typical terrorist car bomb
uses. 240 Marines died when one was driven to their barracks
in Lebanon.

Gary
-- 
Gary Coffman KE4ZV          |    You make it,     | gatech!wa4mei!ke4zv!gary
Destructive Testing Systems |    we break it.     | uunet!rsiatl!ke4zv!gary
534 Shannon Way             |    Guaranteed!      | emory!kd4nc!ke4zv!gary      
Lawrenceville, GA 30244     |                     | emory!ke4zv!gary@gatech.edu
From: mycal@netronix.com (Mycal)
Newsgroups: sci.electronics
Subject: Can Cable TV Descramblers really be detec from outsid 
Distribution: world
Date: Tue, 22 Dec 92 18:06:19 GMT
Organization: Netronix, Inc.


In article <72184@cup.portal.com> Ted_Eugene_Viens@cup.portal.com writes:

  > 
  > >
  > I am sure there are a few different ways that cable companies do this.
  > But in recent meetings with major brand converter sales reps, they told
  > me that most modern addressable converters have an additional register that
  > triggers when it receives a special code on an illegaly authorized box.
  > Scrambled channels are then switched to a channel carrying a message to
  > call the cable company to report service problem so and so.  Smart thieves
  > are forced to throw away the box.

Smart theives are forced to throw away the box?  This is funny, this is
very funny.       ^^^^^^ oh boy this is so funny :):):):):):)

  >Incredibably, many absent-minded thieves
  > actually call their cable companies.
  > Bye...  Ted..
  > 

The above statement should be :
        very stupid theives, or ones who were duped by the cable
        installer (who acutally was the theif), call the cable company.

        other theives, may in some cases, unhook there box until it
        can be looked at by a smart theive.

        smart theives, will either not have this happen (there smart enough
        to figure out how the box works, so they deactivate this trap).  Or
        once the box goes into this mode, they will fixit and re-activate it.

My statements are more 'real world', then the above messages, 'what the cable
company would like you to beleve world.'

mycal -- who is still laughing, 'gee i was forced to toss it' --



PS. this is not a flame, it just struck me as very funny.


-------------------------------------------------------------------------
Restrictions Suck!  Information is cool.                  |
Ignore info/freedom restrictors is the rule.              |
                                                        // \\
Your Pal Mycal -- mycal@netronix.com               Look 4 Gorilla TV!
Newsgroups: sci.electronics
From: jmorriso@ee.ubc.ca (John Paul Morrison)
Subject: Programming 68hc811 ?
Organization: University of BC, Electrical Engineering
Date: Sat, 2 Jan 1993 02:19:17 GMT


Does anyone know how to program the EEPROM of a 68hc811 series MCU,
so it can be used in single chip mode ? (ie no external rom/ram, all
code lives in the EEPROM)

thanks

-- 
__________________________________________________________________________
 John Paul Morrison                     |  
 University of British Columbia, Canada |  
 Electrical Engineering                 |   .sig file without a cause
 jmorriso@ee.ubc.ca              VE7JPM |  
________________________________________|_________________________________
Newsgroups: sci.electronics
From: dmturne@ptsfa.PacBell.COM (Dave Turner)
Subject: Re: Blue LED manufacturer
Reply-To: dmturne@PacBell.COM (Dave Turner)
Organization: Pacific * Bell, San Ramon, CA
Date: Mon, 21 Dec 1992 09:16:16 GMT

In article <8958@lee.SEAS.UCLA.EDU> yee@edison.seas.ucla.edu (John Yee) writes:
>About Blue LEDs, there is an entry in the Digikey (1-800-344-4539) catalog
>for such devices made by CREE, 470nm peak wavelength, $2.80/each, 4 different
>ones 16, 29,32,42 degrees, T-1, T-1 3/4 clear and diffused. 1.5 - 13 mcd.

Hosfelt Electronics has an ad in the January 1993 issue of Radio-Electronics
(p. 50A16) that lists Blue LEDs made by Litton (T-1, T-1 3/4, 470 nm) for
$1.29 each.


-- 
Dave Turner	(510) 823-2001	{att,bellcore,sun,ames,decwrl}!pacbell!dmturne
From: alex@anat3d1.anatomy.upenn.edu (Alex Shrom)
Newsgroups: sci.electronics
Subject: Re: Info On Electronics CAD Programs
Date: 23 Dec 92 16:23:27 GMT
Distribution: na
Organization: University of Pennsylvania


Newsgroups: sci.electronics
From: jna@silver.lcs.mit.edu (right here, right now)
Subject: Re: lasers/collimated light i
Organization: We Take What We Want, Inc.
Distribution: sci
Date: Sun, 3 Jan 1993 02:30:57 GMT

In article <1992Dec31.072835.7253@netcom.com> nagle@netcom.com (John Nagle) writes:
>"glen mead" <glen.mead@canrem.com> writes:
>>jlange@radian.uucp (John Lange) writes:
>>JL>In nightclubs I have recently seen light effects which apparently
>>JL>use bright red, green, and blue lasers which are modulated with
>>JL>mirrors (I think) to do interesting things like project color
>>JL>images on a wall.  The red could be a simple He-Ne laser, but what
>>JL>about the green and the blue?  
>
>      I suspect you are seeing a xenon lamp fronted by a color wheel and
>mirror galvonometers, all computer controlled.  These are now a common
>disco lighting gadget.  The beam is collimated well enough that it looks
>like a laser beam, but it isn't.  Look for leakage of white light from
>the unit.
>
>					John Nagle

The device you describe is called an "Emulator". They're nice. and they
were basically produced when many of the states passed Laser Laws , banned
high-power lasers. 

  -- John
From: rhaar@albert.cs.gmr.com (Bob Haar)
Newsgroups: sci.electronics
Subject: Re: Home Automation Newsgroups
Date: 22 Dec 92 15:25:00 GMT
Reply-To: rhaar@albert.cs.gmr.com
Organization: G.M. Research Laboratories

There is no Usenet news group dedicated to home automation,
but there is a mail list ( intelhouse@dlb.com) that is.

To subscribe, send an email message to intelhouse-request@dlb.com .

---
  	Robert Haar               InterNet : rhaar@gmr.com 
	Computer Science Dept., G.M. Research Laboratories
DISCLAIMER: Unless indicated otherwise, everything in this note is
personal opinion, not an official statement of General Motors Corp.