HDTenEightyP/NetNews huggingface dataset:
From: 880518l@dragon.acadiau.ca (Nelson Langille)
Subject: Re: help - tv remote
Organization: Acadia University
Distribution: sci
Date: Thu, 31 Dec 1992 18:46:22 GMT

schuch@phx.mcd.mot.com (John Schuch) writes:

>In article <1992Dec29.4265.27307@dosgate> "glen mead" <glen.mead@canrem.com> writes:
>>Recently I learned that a friends mother suffers from Hodgkins (sp?)
>>disease.  As a result, her motor control has become very poor and she is

>Finding a cable box or TV with three "favorite" channel settings is
>probably unlikely, at least I've never seen one.

Actually the cable company here rents converters that have a FC button for
favorite channel.  You just program in which are your favorite channels
and every time you press this FC button, it jumps from one favorite channel to
the next.
Newsgroups: sci.electronics
From: "glen mead" <glen.mead@canrem.com>
Subject: lasers/collimated light
Reply-To: "glen mead" <glen.mead@canrem.com>
Organization: Canada Remote Systems
Distribution: sci
Date: 31 Dec 92 13:51:42 EST

jeh@cmkrnl.com writes:

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

Yes, please let me know as I have a great deal of interest in this area. 
In fact, I'm about to head downstairs and continue work on my project now.

Glen Mead - RZ/RD 500 Owners Group
---
 * Amiga-Reader V2.00B * 
--
Canada Remote Systems  - Toronto, Ontario
World's Largest PCBOARD System - 416-629-7000/629-7044
Xref: sparky sci.electronics:21373 sci.energy:6350 rec.autos:30313
From: mwilson@ncratl.AtlantaGA.NCR.COM (Mark Wilson)
Newsgroups: sci.electronics,sci.energy,rec.autos
Subject: Re: Flywheel batteries as EV power source
Date: 22 Dec 92 14:23:42 GMT
Organization: NCR Engineering and Manufacturing Atlanta -- Atlanta, GA

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.

-- 
Mob rule doesn't become any prettier, just because the mob start to call itself
a government.
It ain't charity if you are using someone else's money.
Mark.Wilson@AtlantaGA.NCR.com
Newsgroups: sci.electronics
From: jmacphai@cue.bc.ca (James MacPhail)
Subject: Re: Vector wire pencils
Organization: Computer Using Educators of B.C., Canada
Date: Sun, 3 Jan 93 00:47:14 GMT

>>Are these useful?  They are the "pencils" which wrap a wire around a post
>>and you then solder it.  I'm trying to determine what system to use for
>
>I dont like the look of wire wrapping ... it doesnt look to reliable to me
>but then again, there are many companies that use it .... I wont though!
>

You guys are aware of ScotchFlex, right? If not, check it out. It is made
by 3M (and thus tends to be considered over-priced by some).

It is composed of IDC forks that go through the perf-board from the
wire side, and DIP sockets that plug on from the component side. The 
forks stand out about 0.1" and will take 2-3 layers of wire. Wiring,
unwiring, and changes are VERY fast. No stripping, just push the wire
into the fork with the wiring tool and cut off the excess.

I don't know why 3M doesn't market this better. I used to consider it
a "trade-secret" but if more people used it, the price might come down
and 3M might expand the line. (Currently there is no support for PGA
parts etc. just DIPs)

You can use headers and non-standard sockets by using ones with PC tails
and soldering the forks on the back.

No, I don't work for 3M.

James MacPhail  jmacphai@cue.bc.ca  james@mirg2.phy.queensu.ca
From: MATGBB@LURE.LATROBE.EDU.AU (BYRNES,Graham)
Newsgroups: sci.electronics
Subject: Re: 486DX2 Crystals
Date: 21 Dec 92 07:23:23 GMT
Article-I.D.: lugb.1992Dec21.072323.28556
Organization: La Trobe University
X-News-Reader: VMS NEWS 1.24

In <1992Dec16.194706.27550@iitinc.uucp> sehat@iitinc.uucp writes:

> From article <1992Dec16.011918.25341@eng.ufl.edu>, by iqbal@omaha.eel.ufl.edu (M.Iqbal):
> 
> 
> > 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.
> > 
> 
> Actually, A CPU PLL normally does not pick up any harmonic component of the
> input signal. In fact, the way the CPU PLL works is to compare one edge (for
> example rising edge) of the input clock to the edges of the internal oscillator
> circuit. In order to get 2x internal clock, the internal oscillator is divided
> by 2 before the edge comparison. The frequency of the internal osc is then
> adjusted such that for every input edge there is corresponding edge of the
> divided internal osc (a phase-freq detector is normally used to do this).
> If you need to find more information on the circuit used in the 486DX2, pick
> up a copy of the latest JSSCC.
> -- 
> Sehat Sutardja,
> 
> sehat@iit.com				| INTEGRATED INFORMATION TECHNOLOGY
> 					| 
And aside from that, a square wave only has ODD harmonics, so filtering
for the 2nd harmonic wouldn't work too well...
Graham B
Newsgroups: sci.electronics
From: franzoni@sixter.var.dec.com (Mauro Franzoni)
Subject: Re: MC68HC11 questions
Keywords: 6811 motorola microcontroller
Reply-To: franzoni@sixter.var.dec.com (Mauro Franzoni)
Organization: Digital Equipment Corporation
Distribution: usa
Date: Mon, 28 Dec 1992 16:37:23 GMT

In article <1992Dec22.150437.15637@cbnews.cb.att.com>, wrb@cbnews.cb.att.com
(wallace.r.blackburn) writes:

|> Could I use the Miniboard and some downloading software for the PC to
|> program similar parts such as the 'A1 (only 512 bytes EEPROM)?  B.G. Micro
|> has the 68HC11A1FN for $5.95.  Seems like a good price.  Motorola's books
|> say it has EEPROM (I thought EEPROM parts had 811 in the number).

68HC11A1FN: as far as I know (from a local dealer) the A1 stands for 512 bytes
EEprom,
(A0 = no EPROM, A8 = 8kb EEPROM) the FN stands for OTP (one time program) PLCC
plastic case
with no erase window.

Because it is OTP, I guess it actually comes with EPROM, not EEPROM.

mf
Newsgroups: rec.music.makers.,sci.electronics
From: jimbo@socrates.umd.edu (Jim Bogard)
Subject: Anybody got a schematic for a fast audio keyed strobe?
Organization: University of Maryland University College
Date: Sat, 2 Jan 1993 17:18:20 GMT

Well, being the typical starving musician, I will again resort to the 
DIY route...

Can anybody please point me towards a schematic for a fast strobe?
The idea of this thing is for a microphone to be placed in some
crevice of the drum set, whereupon when the right thing is whacked
the strobe will fire.  Thus, the power supply needs to be able to 
supply enough power to fire the strobe fairly quickly.. I guess 10Hz 
would be a reasonable ceiling.

Thanks.

J-.

-- 
Jim Bogard  (jimbo@socrates.umd.edu)
                                            "Implement now, tweak later."
Tech at large / gigging daemon
From: wb8foz@skybridge.SCL.CWRU.Edu (David Lesher)
Newsgroups: sci.electronics
Subject: Re: RFI free dimmer switches...
Date: 26 Dec 1992 15:45:07 GMT
Organization: NRK Clinic for habitual NetNews abusers - Beltway Annex
Distribution: na
Reply-To: wb8foz@skybridge.scl.cwru.edu (David Lesher)
NNTP-Posting-Host: skybridge.scl.cwru.edu

I'm a little confused by the present discussion.

If you only turn ON at the zero-crossing, you will, I suspect, avoid
RFI problems. But, first off, does this not give you problems in
modulating the output? You could only have setting that are multiples
of the number of {half} cycles. [I suppose that is not TOO limiting,
though, is it?]

Secondly, won't such a dimmer make the lamp singing problem far worse?
The filament gets heated, and cools, over a much longer period than
with chopper-type dimmers.

I suppose the solution is to use line power of a frequency far above
the audio range. Back when I was taking a course on electronic power
control, I recall reading of scheme to provide large office buildings
with ~100khz to run the gas discharge lighting. The idea was to reduce
the losses in the ballasts. Not only does that increase the "light/kw$"
but it would also reduce the "waste heat/lumen" that has to be cooled
by the HVAC.  Wonder what ever came of that idea....
--
A host is a host from coast to coast..wb8foz@skybridge.scl.cwru.edu
& no one will talk to a host that's close..........................
Unless the host (that isn't close).........................pob 1433
is busy, hung or dead....................................20915-1433
Newsgroups: sci.electronics,sci.energy,rec.autos
From:  ()
Subject: Re: Flywheel batteries as EV power source
Date: Wed, 23 Dec 92 21:40:02 GMT

In article <1992Dec23.081836.4720@adobe.com>, pngai@adobe.com (Phil Ngai) writes:
> 
> In article <1992Dec22.204130.18133@enterprise.rdd.lmsc.lockheed.com> () writes:
> >Conservation of energy exactly, where do you think you get the energy to 
> >turn a carbon carbon fly wheel into cotton candy from?  Before you start
> >flaming at others for not doing the math, do it yourself.
> 
> Goodness, an anonymous english major posts. Why don't you think about
> this: suppose I have a torch fueled by 10 gallons of gasoline. Do you
> believe I could vaporize your "carbon carbon" fly wheel? How would
> you compare that to the energy required to merely shred the material?

Nope, I don't believe you could vaporize a carbon carbon fly wheel with 10 
pounds of gasoline (thats why we need to get heat of vaporization numbers).
I do belive that you could burn the flywheel on fire with the torch, but
that's not going to happen in a vacuum (or was that what you ment by 
"vaporization").

As for anonymous, no such thing in this world.
As for english major posts, in my case hardly (just read the grammer)
however for any english majors out there please post!!  This thing
is more important to you (as you are more numerous) than it is to 
the technocrats.  

Darin Olson
R&DD
LMSC
Palo Alto CA
From: dhi00@ccc.amdahl.com (mofo )
Newsgroups: sci.electronics
Subject: re: Failure modes of p-n junction devices running high current?
Date: 21 Dec 92 16:39:41 GMT
Reply-To: dhi00@juts.ccc.amdahl.com (mofo )
Distribution: na
Organization: Amdahl Corporation, Sunnyvale CA

i had the impression some high current semiconductor failures were
caused by spot heating due to uneven current distribution.  this 
would make some spots along the junction carry a heavier density
than others, hence, higher heat load.  i think this is more true
of older devices before they started putting in load balancing
resistors in them.

d
From: clemon@lemsys.UUCP (Craig Lemon VE3XCL)
Newsgroups: sci.electronics
Subject: Re: Caller ID block?
Date: Sun, 27 Dec 1992 11:24:23 EST
Distribution: world
Organization: Private UUCP "Twig" Node
X-Newsreader: Arn V1.00

In article <28815@oasys.dt.navy.mil>, Curt Welch writes:

> Guess what.  I have your name and e-mail address.  It's a weapon too. 
> And I've got it aimed right at YOU!
> 
> Are you going to start complaining about how e-mail and news messages have
> a return address on them next.  And start crying about how unfair it is
> that any crazy USENET reader (like me) can start harassing you?
> 
> And by posting in sci.electronics, there are now thousands of people that
> have your name and e-mail address.  Why are you so worred about one
> company getting your phone number but you don't seem to mind giving your
> e-mail address to thousands of people all around the world?

        Probably because receiving email doesn't wake you up (usually).

>Curt Welch

--
 Craig Lemon VE3XCL (Advanced) - Kitchener, Ontario. +1 519 741 0297
 clemon@lemsys.UUCP clemon%lemsys@xenitec.on.ca  | 1A Electrical Engineering
 TCP/IP: ve3xcl@ve3xcl.ampr.org [44.135.84.51]   |  University of Waterloo
 AX.25 Packet: ve3xcl@ve3euk.#SWON.ON.CAN.NA     | Waterloo, Ontario, CANADA
From: cstadbg@csv.warwick.ac.uk (Mr M J Brown)
Newsgroups: sci.electronics
Subject: Re: Canabalism of old electronics
Date: 31 Dec 92 12:38:34 GMT
Organization: Computing Services, University of Warwick, UK
NNTP-Posting-Host: lily.csv.warwick.ac.uk

In article <1992Dec21.205126.15568@news.mentorg.com> philip@mentorg.com (Philip Peake) writes:
>In article <1992Dec18.203808.25583@kong.gsfc.nasa.gov>, mark stephens <stephens@kong.gsfc.nasa.gov> writes:
>|> Perhaps this is a stupid question but... for those in the home hobbiest
>|> arena, do yall routinely canabalise old radios, TVs, etc. for spare
>|> parts?  Seems like there should be some good components to be had such as
>|> pots, transformers and so on.  I don't know if its worth extracting
>|> resistors, though.
>
>When I started playing with electronics ... about 30 years ago ... that
>was exactly what I did. It was the only way I could afford to play.
>
>Things are not so easy these days, with lots of custom ICs and
>PCB mounted resistors etc leaving leads which are a little
>on the short side, as well as being more difficult to remove.
>

Usually resistors arent worth bothering with, but just about anything else,
including direct soldered ics, SMT, connectors is fair game to me, as long
as I have the trusty Black and Decker heat gun !! Using one of them you can
clear something like a standard PC or AT motherboard sized PCB in about
15 minutes, with hardly any casualties!

=============================================================================  
     _/      _/   _/   _/  _/   _/_/_/_/   |
    _/_/  _/_/   _/   _/_/     _/          |         Michael Brown
   _/  _/  _/   _/   _/       _/_/         |
  _/      _/   _/   _/_/     _/            |   cstadbg@csv.warwick.ac.uk
 _/      _/   _/   _/  _/   _/_/_/_/  _/   |     mjb@dcs.warwick.ac.uk
                                           |    csulo@csv.warwick.ac.uk
=============================================================================
Xref: sparky sci.electronics:21349 misc.consumers:21064
From: louis@aupair.cs.athabascau.ca (Louis Schmittroth)
Newsgroups: sci.electronics,misc.consumers
Subject: Re: DOES AMERICA SAY YES TO JAPAN? - Off track!!
Date: 22 Dec 92 02:37:56 GMT
Followup-To: sci.electronics

rboudrie@chpc.org (Rob Boudrie) writes:


>>> That's part of the reason why there is less actual wealth in the US
>>>to invest. (I don't defend the shitty savings rate of Americans,
>>>although there is more than a casual relationship between small (or
>>>no) paychecks and savings.)
>>
>>How, then, do you explain the fact that the US STILL has the highest per capita
>>income in the world? We do NOT have the highest saving rate.
>>

Whoa, you are away off base here.  Americans have the 8th highest per
capita GNP.  I don't have current figures, but in 1988, The US trailed
Switzerland, Iceland, Japan, Norway, Finland, Sweden, and Denmark, in
GNP per capita.  If I am not mistaked the US has fallen behind even more
since then.

--
Louis Schmittroth louis@cs.athabascau.ca
NW 1/4 18 67 21 W4 Alberta.
Organization: Washington University, St. Louis
Date:         Tue, 29 Dec 92 10:17:28 CST
From:         Dan <DANW@WUVMD>
To:           NETNEWS@WUVMD
Subject:         Looking for Paralell extender
Newsgroups:   sci.electronics

I am looking for a device that will extend a parallel printer port
over a 4 wire connection.  Basically a parallel modem.
Any information on where I might obtain one would be appreciated.

Dan White    danw@wuvmd.wustl.edu
Newsgroups: sci.electronics
From: medha@cbnewsg.cb.att.com (keshav.havnurkar)
Subject: 110/220 V AC why ?
Organization: AT&T
Date: Tue, 29 Dec 1992 16:01:17 GMT

Hi
  I am curious to know why some countries have 110V AC supply
and some 220V AC as their main line voltage ?
Any paticular reason for selecting any one number ? Is there
any talk of standardizing this like SI syatem of measurement ?

keshav@mhcnet.att.com
Newsgroups: sci.electronics
From: kcarver@dante.nmsu.edu (Kenneth Carver)
Subject: Re: Handling CMOS
Organization: New Mexico State University, Las Cruces, NM
Date: Wed, 23 Dec 1992 04:37:36 GMT

4000 series CMOS is well-protected and requires few if any special
handling precautions.  If you are not drawing an arc when you touch
these chips, you should be okay.  For other types of CMOS, Radio Shack
sells a handling kit consisting of a conductive foam pad and wrist
strap with clip lead.  I have found it to be quite sufficient in the
dry desert climate of New Mexico.

--Ken Carver
Newsgroups: sci.electronics,sci.energy,rec.autos.tech
From: pngai@adobe.com (Phil Ngai)
Subject: Re: Flywheel batteries as EV power source
Organization: Adobe Systems Incorporated
Date: Sat, 2 Jan 1993 05:32:58 GMT

In article <30DEC199200153934@pierre.mit.edu> chuck@pierre.mit.edu (Chuck Parsons) writes:
>  Second mechanical strength of materials is _not_ greater than the
>strength of the chemical bonds forming the material. 

In a flywheel, there is a relationship between material strength and
stored kinetic energy, but it is hardly 1 to 1. This would be almost
like arguing that the kinetic energy of a bullet or meteor is limited
to its material strength.

-- 
My opinions are my own.

Newsgroups: sci.electronics
From: paraffa@sunvis2.vislab.olemiss.edu (Carl Raffa)
Subject: help - LCD display
Organization: Mississippi Center for Supercomputing Research
Date: Thu, 31 Dec 1992 06:25:56 GMT

I have a bunch of 40 character by 4 line LCD displays, but I have
no idea how to use them (they came with no documentation).  They
have built in display drivers, and the only I/O seems to be
through a 26 pin connector.  They are house-marked EPSON boards
but the OEM division of EPSON doesn't have any information on them (or
at least they weren't gonna give ME any information on them....)
So, can anyone give me any ideas on this one?  Information on
similar devices would be helpful and much appreciated.

Please respond by e-mail

Carl Raffa
paraffa@sunvis1.vislab.olemiss.edu
----------------------------------------------------------
From: mikael@terapin.com (Mikael Andersson)
Newsgroups: sci.electronics
Subject: Pseudo-static rams
Date: 23 Dec 92 11:08:23 PST
Organization: BBS

Does anyone here know what the price of Pseudo-static ram is compared 
to static and dynamic? What sizes and speed are avaiable?
 
Mikael
Newsgroups: sci.electronics
From: jmorriso@ee.ubc.ca (John Paul Morrison)
Subject: Re: IR remote controls info?
Organization: University of BC, Electrical Engineering
Date: Thu, 31 Dec 1992 06:44:56 GMT

In article <1992Dec30.175645.11441@spang.Camosun.BC.CA> ua123@freenet.victoria.bc.ca (Matthew A. Skala) writes:
>
>
>I'm an independent student working on a project where I need to have a computer
>send IR remote control commands to a VCR to start and stop a tape.  I'd like
>it to be able to work with many different VCRs and so I need a way for it to
>"learn" the command sequence to send and then send it.  I know this is possible
>because those "universal" remotes exist which can record a command sequence and
>then play it back well enough to fool the VCR.  The simplest approach would be
>to just hook an IR phototransistor and an IR LED to the 'pooter, have it sample
>the command at a suitable rate, and then play it back out of the LED.  Trouble
>is, I believe some remote controls send their data by modulating a carrier, and
>so my sampling rate would have to be high enough to capture the carrier
>frequency.  This might be impractical.
>
IR devices use a carrier in the 40kHz sort of {range. This isn't hard too
sample with a microprocessor. For a trainable remote control, look at 
Steve Ciarcia's article in Byte, 1987 (March).

IF you know the exact code, you could program the IR directly.

best bet: get an HP48 calculator, and download the software that lets
you use it as a learning remote control (option 1) or as remote control
emulator (option 2; several brands of devices are supported)

>Does anybody have any suggestions?  Please reply by EMail and I will post a
>summary of the responses I get.
>-- 
>CENSORSHIP SUCKS!  UP WITH THE PEOPLE!
>
>Matthew Skala - VE7MSK - ua123@freenet.victoria.bc.ca


-- 
__________________________________________________________________________
 John Paul Morrison                     |  
 University of British Columbia, Canada |  
 Electrical Engineering                 |   .sig file without a cause
 jmorriso@ee.ubc.ca              VE7JPM |  
________________________________________|_________________________________
From: louis@aupair.cs.athabascau.ca (Louis Schmittroth)
Newsgroups: sci.electronics,misc.consumers
Subject: Re: DOES AMERICA SAY YES TO JAPAN? - Off track!!
Date: 22 Dec 92 02:22:27 GMT
Followup-To: sci.electronics

fester@island.COM (Mike Fester) writes:


>Strange, is it not, then, that our GNP is STILL double Japan's? Strange, also,
>that American companies ignored the competition for decades. Again, you might
>read Peter Drucker. He DID warn (in the 50's!) that America would be in
>trouble in the 70's, due to lack of capital investment. He also details how
>large US manufacturers ignored foreign challengers, tried to 'cream' the 
>markets (ie, only selling "top-of-the-line", and leaving mass-consumer goods
>to those 'foreigners'), and basically frittered away much of our leadership.

>AFTER you have read Drucker, you will be better equipped to take up the debate
>with some INTELLIGENT criticisms.

No, I have not read Drucker, at least on Japan, but I have read both
Prestowitz,"Trading Places," and Lester Thurow, "Head to Head."  And
yes American companies did make mistakes in hindsight.  AT&T *never*
should have given, or sold, the rights to the transistor to Sony.  IBM
never should have agree to give their basic patents to the Japanese
when they were "allowed" to set up a subsidiary in Japan.  Univac never
should have granted the full disclosure of their transistorized real
time computers to a 51% Japanese owned subsidiary in the sixties when 
the Japanese needed real time control of the bullet train.  And on and
on.  

The power structure in the US thought that Japan as an ally against
the threat of the Russian Bear was more important that fair trading 
for American companies.

You are right, however that American companies did fritter away the
huge technological and productive lead they had, at least up to about
1970.  After that it dawned on some Americans that there was a real
threat to the continued prosperity of the US.

BTW, you report that Japan has less than half the GNP of the US, but
you neglect to note that Japan's population is less than half.  Japan
has the *highest* per capita GNP in the world, something like 20%
higher than the US.

WAKE UP AMERICANS.  It may be too late already.  BTW if you want the
funny side of the colonization of the USA by the Japanes, read
Kurt Vonnegut's "Hokus Pokus."   At first it is funny, hilarious even,
but then it sinks in that it really is happening.

One request.  Please post the Drucker book which I am encouraged to
read.  I have lotsa free time now, being unemployed.
--
Louis Schmittroth louis@cs.athabascau.ca
NW 1/4 18 67 21 W4 Alberta.