HDTenEightyP/NetNews huggingface dataset:
From: sasrer@unx.sas.com (Rodney Radford)
Subject: Re: Thunderstorms (was: Re: Night and Winter)
Date: Tue, 6 Oct 1992 18:05:20 GMT
Organization: SAS Institute Inc.

In a galaxy far away, "Janis Maria Cortese" once said:
>Just the other day "Karl Denninge" said:
>>>>Lightning is one of those things you really can't protect well against.
>>>Yes, you can.  If an electrical storm comes up, GET OFF YOUR COMPUTER
>>>AND UNPLUG THE DAMNED THING.
>>>Just unplug everything you can.  Nothing is better protection than that.

Well unplugging everything is also not guaranteed to work!

My manager had a case where his house was struck by lighting and it fried all
kings of electronic devices throughout the house including his PC - nothing
strange so far right? Wrong, the PC was physically UNPLUGGED from the socket
as well as the modem was unplugged from the phone line! He just had the PC, and
modem sitting in the middle of the floor, with the wire all coiled up. After
everything else in the house was fried he tried plugging in his PC to be
dismayed that it, too, did not work; nor did the modem (with another PC). 
It seems that all the wire (20-30') hooked to his PC acted as an antenna and
picked up enough electricity from the EMF in the room!

So unplugging it is still not a complete guarantee!!!!
--
---
Rodney Radford          || Computer Graphics/Imaging
sasrer@unx.sas.com      || SAS Institute, Inc.
(919) 677-8000 x7703    || Cary, NC  27513
From: heyes@dadev.cebaf.gov (Graham Heyes)
Subject: Digital design on a Mac?
Organization: Continuous Electron Beam Accelerator Facility
Distribution: sci.electronics
Date: Fri, 2 Oct 1992 18:51:08 GMT

Does anyone know of a, preferably shareware, program to aid
design of digital circuits on a Mac? I have found something 
called DigSim2.8 but it has a very limited set of components
built in.

	thanks,
		graham Heyes
Newsgroups: sci.electronics
From: dfs5716@usl.edu (Seidel Daniel F)
Subject: LD's and how much info they hold.
Keywords: storage,LD's
Organization: University of Southwestern Louisiana
Distribution: y
Date: Tue, 6 Oct 1992 17:38:52 GMT






   Just wondering ... Does anyone out there in net-land know exactly what
the storage capacity is on laser discs (movie size).  A person I know was
curious as to whether or not any sort of storage compression is used on these
due to the fact that they first reared their head many many (well 
technologically speaking) years ago.
Newsgroups: sci.electronics
Subject: Re: Soil Humidity Sensors
From: srgxnbs@grace.dsir.govt.nz
Date: 2 Oct 92 09:27:09 +1200
Organization: DSIR, Gracefield, New Zealand

In article <6079@mtecv2.mty.itesm.mx>, ggonzale@mtecv2.mty.itesm.mx (Gabriel Gonzalez) writes:
> Hello there!
> 
> I'm working in an automatic watering system for this campus, and I need
> to know how can I measure the humidity level of the soil. I need to get
> an electrical signal representing this parameter. I've searched in
> catalogs (like Omegas's) and found nothing. I've thought about measuring
> the earths resistance, but found no easy way of doing it. It doesn't
> have to be a very accurate measurement, but I need a good (read it
> stable) signal to work with. If you can give me any ideas I'll
> appreciate it.
> We are building up a control system using a DP-31 with a PS; we monitor
> the water flow an level of several deposits and wells.
> Thanks for your help.
> 
> Gabriel Gonzalez (CALVIN)
> ggonzale@mtecv2.mty.itesm.mx

the method I've seen is a tube stuck into the ground with a porous ceramic
plug in the bottom. The tube is filled with water and evacuated. A pressure
gauge indicates the partial pressure and hence moisture content. We played
round with attaching an electronic pressure sensor for remote monitoring,
projected ended up on the low-priority shelf.

these tubes are commercially available, check out irrigation specialists

> 
-- 
Bruce Spedding
Materials Science and Performance
Industrial Research Ltd,     Fax: +64-4-569-0132
P.O.Box 31310,              Work: +64-4-569-0485
Lower Hutt,  ( NZST : +12 ) Home: +64-4-562-8522
New Zealand.  Internet: srgxnbs@grv.grace.cri.nz
From: CPS@cup.portal.com (CHRIS PATRIC SMOLINSKI)
Newsgroups: sci.electronics
Subject: HV transformer sources?
Date: Mon, 28 Sep 92 16:46:40 PDT
Organization: The Portal System (TM)
Distribution: usa

Anyone know of any mail order sources for reasonably priced HV transformers
suitable for Tesla coils? From what I've heard, neon sign transformers work
pretty well.


- CHRIS
Newsgroups: sci.electronics
From: kennehra@craft.camp.clarkson.edu (Rich"TheMan"Kennehan)
Subject: Re: Electronics magazines & Mail order brides
Organization: Clarkson University
Date: Mon, 5 Oct 1992 18:30:08 GMT



Hi.   Can you guys reply to this newsgroup instead of sending me mail?
The mail I'm getting is very amusing and I'd like everyone to get a 
chance to read it!  What a refreshing change of pace from all of these
techie posts!!!!

- Rich


Newsgroups: sci.electronics
From: ollis@redbck.stl.dec.com (Stephen Ollis)
Subject: Nitonol & Flexinol..
Reply-To: ollis@redbck.stl.dec.com (Stephen Ollis)
Organization: Digital Equipment Corporation
Date: Wed, 30 Sep 1992 02:25:41 GMT


Pardon my ignorance but what are Flexinol and Nitinol??

Stevo..

--
DIGITAL Telephone Support, Sydney AUSTRALIA   *   Ph: +61 2 5615675 (BH)
Email: ollis@redbck.enet.dec.com            *  *      +61 2 6268533 (AH)
ICBM: 33 43'S 150 52' 15"E                    +       +61 2 5615488 (FAX)
                                             *
   Terra Australis Espirito Santo - The Great Southland of the Holy Spirit
From: downin@oasys.dt.navy.mil (Dave Downin)
Newsgroups: sci.electronics
Subject: Mystery Part!
Date: 2 Oct 92 19:10:14 GMT
Reply-To: downin@oasys.dt.navy.mil (Dave Downin)
Organization: Carderock Division, NSWC, Bethesda, MD

Help, I just blew up some kind of transistor and haven't the slightest
idea of what it is...I am assuming that it was a transistor because
it was labeled Q1...and was mounted on a pretty decent size heat sink.
It was in a Sigma monitor.

At one time it looked something like this:

----------
|   O    |
----------
|ST 99123|
|BUZ80AFI|
|        |
----------
|   |    |
|   |    |
|   |    |

If possible, a cross reference to either a Motorolla or RCA part would
be most helpfull!  Also, e-mail response would be greatly appreciated!

-Dave Downin
From: myers@hpfcso.FC.HP.COM (Bob Myers)
Date: Mon, 5 Oct 1992 16:38:14 GMT
Subject: Re: How do LCD TV screens work?
Organization: Hewlett-Packard, Fort Collins, CO, USA
Newsgroups: sci.electronics


> Just curious -- what devices are used to scan LCD TV screens and light
> the individual pixels? 
> 
> Kent 

In an LCD screen, the pixels are not indivually "lit" - instead, there is
a uniform backlight (which may just be reflected ambient light, or it may
be constructed from, say, fluorescent tubes with a diffuser.  The individual
cells (pixels) of the LCD panel act as shutters or valves for this light; when
the cell is ON (a voltage exists across the cell), the cell cuts off the
light (in the most typical mode of operation).


Bob Myers  KC0EW   Hewlett-Packard Co.      |Opinions expressed here are not
                   User Interface Tech. Div.|those of my employer or any other
myers@fc.hp.com    Fort Collins, Colorado   |sentient life-form on this planet.
Xref: sparky sci.electronics:16428 rec.radio.amateur.misc:16294
From: btbg1194@uxa.cso.uiuc.edu (Bradley T Banko)
Newsgroups: sci.electronics,rec.radio.amateur.misc
Subject: Aircraft RCV mod for Heath HW2M 2m HT?
Date: 1 Oct 92 14:24:19 GMT
Article-I.D.: news.BvG5CL.6pG
Organization: University of Illinois at Urbana

I would like to know if there is an AM Aircraft RCV mod for my 
Heath HW2M (Standard) 2m HT.  I know that there is a key sequence
mod for out-of-band transmit, but that isn't useful to me.

Thanks in advance for your comments.

KB8CNE, Brad Banko
-- 
Brad Banko;  Dept of Physics;  U of Illinois;  b-banko@uiuc.edu
=========================================================================
Tatiana Gutsu for President!                     73 de kb8cne @ n9lnq.il
Newsgroups: sci.electronics
From: ckp@netcom.com (Charles Pooley)
Subject: Re: Are HeNe lasers polarised?
Summary: explanation, HeNe polarization
Organization: Netcom - Online Communication Services  (408 241-9760 guest) 
Date: Tue, 6 Oct 1992 16:04:56 GMT


From earlier art, ques. re polarization of HeNe lasers can be clarified as
follows:
1--lasers usually run on several longitudinal modes--that is, if 2x cavity
   length is N wavelengths of light at the center of the lasing linewidth,
    there will be output at several adjascent modes at N+1, N-1, N+2, N-2,
     etc, and, unless constrained, adjascent longitudinal modes are
      polarized at right angles to each other (ie, if the even modes are
      vertical, the odd modes will be horizontal).

2--to force all the modes to have a common polarization plane which does
    not wander (see #3--), a polarity sensitive loss device is inserted
     intra-cavity, so lasing will occur at the polarization having the
     least loss.  This is usually done by having a glass plane tilted at
      the Brewster angle inside the cavity.  This reflects away some light
      at some polarization and none at the 'favorable' polarization.

3--without the Brewster element discussed above, the output is a set of
    crossed-polarized outputs which wander in polarization, as the cavity
    length changes with temperature as the laser warms up, etc.  It is
    said to be 'randomly polarized'.
-- 
Charles Pooley                  ckp@netcom.com    GEnie  c.pooley
EE consultant, Los Angeles, CA
From: dcg5662@hertz.njit.edu (Dave Grabowski (KxiK))
Newsgroups: sci.electronics
Subject: Re: Switch for serial port.
Date: 27 Sep 92 19:49:39 GMT
Organization: New Jersey Institute of Technology, Newark, N.J.

In article <34FoRB1w165w@ersys.edmonton.ab.ca> mbevan@ersys.edmonton.ab.ca (Mark Bevan) writes:
>What pins are connected to the the switch on a RS232 dataswitch 
>(a device used to connect 2+ peripherals to the same port without 
>having to disconnect and connect).
>
>Thanks Mark
>
>Mark Bevan              mbevan@ersys.edmonton.ab.ca 

  It depends. RS-232 usually uses pins 2,3,4,5,6,8,20, and 22. The only
other pins that are used are 1 & 7, which are grounds. Depending on the
switch you have, it may switch some or all of the above pins, or it may
switch >ALL< 25 lines. Those switchboxes really look nasty when you ope
them up. Almost gotta feel sorry for the people who hafta wire them up.

-Dave

-- 
-----------------------------------------------------------------------------
Kappa Xi Kappa - Over & Above!                         dcg5662@hertz.njit.edu
9 Sussex Ave., Newark, NJ (car theft capital USA)   70721.2222@compuserve.com
Newsgroups: sci.electronics
Subject: Help! Electronic voice changer wanted!
From: <BL6OCHMW@MIAMIU.BITNET>
Date: Sunday, 27 Sep 1992 19:13:36 EDT
Organization: Miami University - Academic Computer Service

I am looking for the schematics/a kit/pre-fabricated device which can attach
 
or easily be attached to a telephone in order to change all of the
 
characteristics of a person's voice.  The more flexible the electronics,
 
the better.
 
bl6ochmw@miamiu.acs.muohio.edu
From: Geoff.Swan@mailbox.bison.mb.ca (Geoff Swan)
Newsgroups: sci.electronics
Subject: Re: building a constant current power supply
Date: 24 Sep 92 23:13:58 CST

Organization: Megadata P/L, North Ryde, Sydney, Aust.

In article <lehtin.717287715@ee.ualberta.ca>, lehtin@ee.ualberta.ca (Ray 'Stingray' Lehtiniemi) writes:
> 
> 	I am currently working on a constant-current power supply to charge
> a large battery.  Is there anybody out there who has experience in building
> constant current, variable voltage power supplies in the 5 to 8 kW range? 
> The charger will be running off a 230V 30A outlet, putting out 160 - 300
> VDC at 12.2 amps. I need info on how to best accomplish this.  Please e-mail
> me (lehtin@bode.ee.ualberta.ca).
> 
> 		- Thanx

It's just the same as building a constant-voltage supply, except the error
signal returned to the controller comes from across a shunt in series with
the load rather than a proportion of the output voltage. Make sure that
the output voltage range is large enough to accomodate the range of loads
that you expect (i.e. you *cannot* operate into an open circuit - always
have some sort of burden on the supply). Otherwise design it as a conventional
off-line switch-mode power supply (you may want to use resonant mode or
phase modulated switch mode supplies if you need really low noise on your
DC rail, otherwise PWM will do). Just be careful when you design the
converter transformer that you operate outside the saturation points for
the range of expected output voltage.

    Sla/n go fo/ill,
                    Risky B.
--------------------------------------------------------------------------
Geoff Swan (research & development)   _--_|\         swanee@megadata.oz.au
Megadata Pty Ltd                     /      \ 
2/37 Waterloo Rd, North Ryde,        \_.--._/               +61 2 805 0899
NSW 2113, Australia.                       v          (Fax) +61 2 887 4847

 * Origin: The Electronic Mailbox (1:348/7.0)
From: mycal@netronix.com (Mycal Johnson)
Newsgroups: sci.electronics
Subject: DSP-Vocoder
Distribution: world
Date: Tue, 06 Oct 92 16:20:54 GMT
Organization: Netronix, Inc.



I was thinking about messing around with DSP's.  A single DSP full-duplex
vocoder looks like a good project.  The only DSP that I have a data sheet
that can preform this function is the TI TMS32010.  Does anyone know
a better/newer/cheaper DSP to use for this type of project?

Also does anyone know where to get the specs for the LPC-10 algorithm?

My goal is to cram full duplex voice accross a 2400 baud modem.


Thanx in advance,

mycal



California Ballot Recommendations -- by your pal mycal@netronix.com
-----------------------------------------------------------------------------
Prop. 155- NO   Prop. 156- NO   Prop. 157- NO   Prop. 158- NO   Prop. 159- NO
Prop. 160- YES  Prop. 161- YES  Prop. 163- YES  Prop. 164- YES  Prop. 165- YES
Prop. 166- NO   Prop. 167- NO
  Cut Government Spending, Cut Government Control, Cut Govenment period.
Newsgroups: sci.electronics
From: manuelp@ecf.toronto.edu (MANUELPILLAI Gerald Nishanthan)
Subject: Re: Remote control over the telephone.
Keywords: remote-control, telephone.
Organization: University of Toronto, Engineering Computing Facility
Date: Sun, 27 Sep 1992 04:58:35 GMT

There is an X10-based product which does this. I don't know the details,
but it allows you to issue touch-tone commands over the phone to a controller,
which sends on/off commands to the appliance (over the house wiring to an
X10 module).

A company here in Toronto sells X10 products, Baran-Harper Group (416-294-6473).
They do mail order, I bought an I/R repeater from them, no problems.  

Newsgroups: sci.electronics
From: choy@skorpio.usask.ca (I am a terminator.)
Subject: How bulletproof are batteries?
Organization: University of Saskatchewan, Saskatoon, Canada
Date: Thu, 1 Oct 1992 20:20:03 GMT

How destructible/fragile/tough are average household AA,C,D cells, etc?
This kind of info is handy when I'm making things that can take
a beating.

Henry Choy
choy@cs.usask.ca
Newsgroups: sci.electronics
From: walsh@aesc.cs.odu.edu (Michael J Walsh)
Subject: Alphanumeric Pagers
Organization: Old Dominion University
Date: Tue, 6 Oct 1992 17:18:04 GMT


I've been thinking of getting a pager and the way to go, I think, is
an Alphanumeric pager which receives a short message and number.

I just started calling around and due to being a young person I 
don't have the benifit of credit, I might have to purchase the 
pager itself.


I've been quoted a price of $221 and would like to know is this
an average price and if not would it be worth mail ordering one
somewhere and if so where?

E-mail me or let me know where I should cross post this, thanks.


-Michael

I really need to briefed on the subject.

-- 
test
From: stevek@gobi.UUCP (Stephen Kogge)
Newsgroups: sci.electronics
Subject: Re: Nitonol & Flexinol..
Date: 30 Sep 92 10:45:44 GMT
Organization: Underwater Imaging

In article <1992Sep30.022541.10659@funlwb.enet.dec.com> ollis@redbck.stl.dec.com (Stephen Ollis) writes:
>
>Pardon my ignorance but what are Flexinol and Nitinol??
>
>Stevo..

	Nitinol was developed by the the US Navy at of all places NOL White
Oak Md Labs, alas they are now NSWC and are on the net as nswc.gov.
	Nitinol is a metal that when heated to the correct temperature
will return to its original shape. Stories about spoons and tin cups that
folded up when heated by tea or coffee abounded at NOL when it was
first invented.

	Steve Kogge
	stevek@uimage.com
From: klimasewski@fccvde.enet.dec.com (My name is...)
Newsgroups: sci.electronics
Subject: EPROM/PAL PROGRAMMERS
Date: 29 Sep 92 12:05:16 GMT
Organization: Digital Equipment Corporation


I would like some comments from users on the following programmers.

POCKET PROGRAMMER - $129.95 (Intronics, Inc.)

MS-DOS E/EEPROM Programming System - $289.00 (Andromeda Research)

UNIVERSAL DEVICE PROGRAMMER - $475.00 (Link Computer Graphics,Inc)

PC EPROM PROGRAMMER - $139.95 (Needham's Electronics)

My only comment is that they all need several adapters for their list
of programable devices.


                                      Ken
Newsgroups: sci.electronics
From: sehari@iastate.edu (Babak Sehari)
Subject: Re: Remote control over the telephone.
Originator: sehari@vincent1.iastate.edu
Keywords: remote-control, telephone.
Organization: Iowa State University of Science and Technology, Ames, Iowa.
Date: Sat, 26 Sep 1992 05:17:51 GMT

In <1992Sep25.092643.329@hemlock.cray.com> andyw@aspen32.cray.com (Andy Warner) writes:


>A friend wants to be able to control an electrical device
>over the telephone. A simple relay closure upon receipt
>of a DMTF sequence would be fine.
>Technically, I thought this would be feasable, but since
>my friend is no techno-freak, can anyone refer me to commercial
>products that can do this kind of thing ? I wondered if things
>like this were available from alarm companies ?

>Thanks,
>-- 
>andyw.	N0REN/G1XRL

>andyw@aspen.cray.com	Andy Warner, Cray Research, Inc.	(612) 683-5835

I do not know of any commercial product that can do that but by modifying
your answering machine a little bit you might be able to achieve your goal.

Another way is using a computer and automatic modem.  In this case, you
let a server, or bbs, run all the time on your computer and wait for phone
calls.  This way you could not only increase the security by asking for
password(s), but also you could control virtually unlimited number of 
applications.  Also, you could keep a log of who did what at what time, etc...
Off course a little bit of programming and design of some interface board
might be required.  But, it is not big deal and is very simple.

                    With highest regards,
                         Babak   Sehari.

Xref: sparky sci.electronics:16347 comp.robotics:1913
From: irie@husc9.harvard.edu (Robert E. Irie)
Newsgroups: sci.electronics,comp.robotics
Subject: Radio Control Car Interface help!
Date: 30 Sep 92 03:11:03 GMT
Article-I.D.: husc9.IRIE.92Sep29201103
Distribution: sci
Organization: Harvard Arts and Sciences Computer Services, Cambridge, MA

Hi all,
	For my senior design project, I am plannign on adding
a microcontroller (68hc11) to a RC model car that will effectively
bypass the receiver on the car and the servos/motors/relays. Basically,
I want the microcontroller to allow normal signals from the handheld
transmitter to pass to the servos et al, but will take over when certain
conditions (sensed by ultrasonic transducers) occur. I would like
accurate control of the motors and steering, so I figure a "serious"
model car (ie not the Radio Shack cars) would be suitable.

Does anyone have any experience with RC cars? modifying them?
Any suggestions and comments would be much appreciated! I can
post a summary for others who are also interested. Thanks again!

Robert Irie

--
File: AW esome .sig            REVIEW/SEE/ADMIRE              Escape: Reality
=====|====|====|====|====|====|====|====|====|====|====|====|====|====|====|=
Robert E. Irie                                         irie@husc.harvard.edu
Senior ES Major, Harvard College                       irie@husc.bitnet
Harvard Robotics Laboratory                            irie@hrl.harvard.edu
-----------------------------------------------------------------------------
Type mail or use rn commands          Line     Column    8M, 20Mhz CPU Wanted
Newsgroups: sci.electronics,comp.sys.ibm.pc.hardware
From: u009@csx.cciw.ca (G. Stewart Beal)
Subject: Re: ibm pc keyboard loopback plug
Organization: Canada Centre for Inland Waters
Date: Thu, 1 Oct 1992 14:03:53 GMT

In article <govender.717416622@shannon> govender@shannon.ee.wits.ac.za (Govender) writes:
>is there a way of using a dummy plug to fool a pc/at into thinking that it
>has a keyboard at switch on?
>
Some Bios's have the ability to specify if a keyboard is connected. I
personally have a problem with one keyboard (you know the problem: "KEYBOARD
NONEXISTANT - HIT F1 TO CONTINUE !) and I have disabled the keyboard error.
The controller is apparently still initialized but the error condition is
ignored. The keyboard still works with the system too.
 
Regards, Stu Beal, VE3MWM, U009@CS.CCIW.CA,
National Water Research Institute, Burlington, Ontario, Canada.
 
"We'd made it through yet another nuclear winter and
 the lawn had just trapped and eaten it's first robin." - Kyle J. Spiller

Newsgroups: sci.electronics,misc.forsale,misc.forsale.computers,misc.forsale.wanted,rec.radio.swap,rec.radio.amateur,sci.physics
From: root@torinet.com (Superuser)
Subject: Tektronix 2235 Scope for sale
Organization: Torinet Systems, Inc.
Distribution: misc.forsale,misc.forsale.computers,misc.forsale.wanted,sci.electronics,sci.physics
Date: Sun, 27 Sep 1992 21:33:18 GMT
Keywords: Tektronix 2235 Scope for sale

Tektronix 2235 Oscilloscope

- 100 MHz
- Dual Trace
- Calibrated on Sept 90
- Two 1x,10x probes included
- Front Clip-On Panel Cover
- Tektronix equipment has the HIGHEST resale value in the industry.

This is an excellent scope. It has been well taken care of and functions
perfectly. Unfortunately, the manual has gone missing, but who needs one!
The retail value of this scope (new) is around $ 1950 US. It was purchased 
used for just over $ 1700.00 CDN. 

$ 1500 CDN + Shipping or Best Offer. 
It MUST sell. I will concider all offers: Best one takes it with them.
--
Torin Walker (Super)         root@torinet.com           Voice (416) 886-8054
Torinet Systems, Inc.       uunet!torinet!root          Fax   (416) 756-0720
Newsgroups: sci.electronics
From: sehari@iastate.edu (Babak Sehari)
Subject: Re: need help about practical applications on am
Originator: sehari@vincent2.iastate.edu
Organization: Iowa State University of Science and Technology, Ames, Iowa.
Date: Sun, 27 Sep 1992 19:58:39 GMT

In <1686BF15.B521307@vmtecqro.qro.itesm.mx> B521307@vmtecqro.qro.itesm.mx (Benjamin Millan Garcia) writes:

>hi every body. I would like to know about actual and important practical
>aplications on amplitud modulated. I will thank anyhelp on this topic.
>Thanks.
> 
>b521307 at vmtecqro.qro.itesm.mx

I assume you are looking for legal, according to FCC, applications.  Other
wise, you could do anything you do with FM or PM with AM as well.

                      With highest regards,
                           Babak   Sehari.