HDTenEightyP/NetNews huggingface dataset:
From: srgxnbs@grace.cri.nz
Newsgroups: sci.electronics
Subject: RE: Is lead solder bad for me?
Date: Wed, 18 Nov 92 00:24:08 GMT  
Organization: Industrial Research Ltd., New Zealand.

>From: kehoe@netcom.com (Thomas David Kehoe)
>Subj: Is lead solder bad for me?
>Date: Tue, 17 Nov 1992 17:55:50 GMT
>
>Will I get lead poisoning from breathing the smoke
>from solder?  I work next to an open window, and leave
>the soldering iron on the window sill, but when I'm
>doing close soldering work, I can't avoid breathing
>the smoke form the solder.
>
>My father got lead poisoning last year when burning
>paint off his house, so I know that lead can vaporize
>in smoke.  I think his symptoms were headaches and
>dizziness.
>
>I've switched to lead-free solder, which is 97% tin and
>3% silver (available at Radio Shack).  The label still
>says to avoid breathing the smoke.  Why doesn't everyone
>use th

I had an article a long time ago that claimed a correlation between 
soldering and asthma (I'm mildly asthmatic and I do react). The 
article blamed the _flux_ and recommended ventilation, I use a small 
fan to blow the vapour away, works ok.

>-- 
>"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
From: jimkirk@news.uwyo.edu
Newsgroups: sci.electronics
Subject: CFV: rec.crafts.metalworking
Date: 17 Nov 92 10:28:05 MST
Distribution: world
Organization: University of Wyoming - Laramie, WY

This is a Call For Votes (CFV) on creation of the unmoderated newsgroup
rec.crafts.metalworking.  The charter is reproduced below.

To vote FOR the creation of this new newsgroup, send mail to
metalyes@corral.uwyo.edu.  To vote AGAINST the creation of this group,
send mail to metalno@corral.uwyo.edu.  Please send votes *only* to one
of these two addresses, otherwise it will not count.  Do not post your
vote, or send it to my personal mailbox.  The content of the e-mail
ballot is not important, just the address it is sent to.

The voting period will last until 23:59:59 MST, 14-DEC-1992.  Votes
*received* after that date cannot be counted.

Charter
-------

Proposed Charter -- REC.CRAFTS.METALWORKING

The USENET newsgroup, rec.crafts.metalworking, is a newsgroup which discusses
various aspects of working with metal, such as (but not limited to):

  machining, as on a lathe, milling machine, grinder, etc.;
  numerical control of such machines;
  welding, whether by gas, arc, mig, tig, thermite, or other methods;
  Metal joining, whether welding, brazing, soldering, riveting,
    screwing, folding, etc.  (this section was added during the discussion)
  casting various metals by various methods;
  hardening/tempering various metals;
  blacksmithing/forging;
  spinning and hammer work;
  sheet metal work;
  jewelry-making;
  purchasing and/or reconditioning metalworking tools and machinery;
  interesting projects;
  books on metal technologies and history;

Example areas of interest:

  knife/sword making;
  automotive repair;
  steam engine (model/scale, though full-sized discussions are welcome!);
  art work, such as bronze castings and sculptures;
  gunsmithing;
  toolmaking, such as for woodworking, further metalworking, etc.;

While the bulk of the discussion will probably be directed towards
small-scale "home" shops, industrial/production discussions are also
quite welcome.
-- 
Jim Kirkpatrick
jimkirk@corral.uwyo.edu
Newsgroups: sci.electronics
From: David McKay <dinosaur@zooid.guild.org>
Subject: infrared wireless microphones
Organization: The Zoo of Ids
Date: Wed, 18 Nov 1992 06:04:03 GMT


  I'm working on an engineering design project to solve a problem of
interference with wireless microphones in lecture halls at my school.
I know that Radio Shack sells a device which uses a modulated infrared
beam to transmit from a stereo to a pair of headphones and was wondering
if anybody manufactures a similar device for wireless microphones.
 
  In other words, I'm looking for a wireless microphone which does not
use radio frequencies.
 
  Is such a device available? If so, who manufactures it and what price
does such a system go for?
 
  Any help will be appreciated.
 
  Please send any replies via mail to 9216817@SSCvax.CIS.McMaster.CA
instead of to the address at the header of this message.
 
                                         Thanks,
                                             David McKay.
 
                                  (9216817@SSCvax.CIS.McMaster.CA)
Newsgroups: sci.electronics
From: kbass@gmuvax2.gmu.edu (Ken Bass)
Subject: Re: Cable Channel Modulator?
Organization: George Mason University, Fairfax, Va.
Distribution: usa
Date: Thu, 19 Nov 1992 16:19:50 GMT

In article <1992Nov5.160404.12185@phx.mcd.mot.com> schuch@phx.mcd.mot.com (John Schuch) writes:
>Does anyone know where I might find an expensive video modulator
>with an output around cable channel 55? I don't really need audio
>but it would be nice.
>
>Tnx,
>John
>

Waynes World?

-- 
Ken Bass (kbass@gmuvax2.gmu.edu)              |   Telecommunications  
George Mason University                       |   Techniques Corp, 
Student, Department of Electrical Engineering |   Software Engineer
From: v064mcqs@ubvmsb.cc.buffalo.edu (NEIL GANDLER)
Newsgroups: sci.electronics
Subject: Needing advice on patenting and product development
Date: 17 Nov 92 21:50:00 GMT
Organization: University at Buffalo
News-Software: VAX/VMS VNEWS 1.41


    I have a product that I'm developing and I decided to call the 
National Idea Center in Washington D.C. which aparatently is a product
developer. I decided calling would not hurt. In a few weeks they sent me
information. Now I have had several discussions with a representative.
And now the catch has finally come. He requires $800 upfront for costs
of attorneys, research etc and the words "alot of money can be made"
came up alot. I am not about to fall for this. Has anyone had any sucess
of experience with this or a similar type of company. It seems these days
that you have to be part of a big company to develop your idea or fall
for these phony miracles. I would appreciate any advice.

	Neil Gandler
From: cmh@eng.cam.ac.uk (C.M. Hicks)
Newsgroups: sci.electronics
Subject: Re: How to build a noise reducer?
Date: 18 Nov 92 16:18:40 GMT
Organization: cam.eng

zhenya@socs.uts.edu.au ( The Firefox.) writes:

>Does anyone have any ideas about the best way to build a device that takes
>an input from an external microphone, shifts the signal 180 degrees out
>of phase, and then re-emits it with little loss of resolution of the
>waveform in the process?

>It would be great if it could also work from frequencies of about 20Hz up...

>Maybe there is a mail-order kit for something similar that someone know of?

>Thanks in advance....
>Zhenya.
>--

Excuse me if I'm being thick, but won't reversing the microphone connections
do this :-? If this isn't what you mean (it doesn't have much to do with
'noise reducing' - see subject line) then please restate the question, and 
maybe I can be more helpful...

Chris
Newsgroups: sci.electronics
From: schuster@panix.com (Michael Schuster)
Subject: Smoke Theory
Date: Thu, 19 Nov 1992 17:57:08 GMT
Organization: PANIX Public Access Unix & Internet, NYC

Thanks to David Geiser for digging this out.
I've had so many email requests for it (when you get it, send it to
me) that I decided to post it.


                  NEW "SMOKE" THEORY OF ELECTRONICS
                  =================================

While going over old course files in electronic devices, I came across
a sheet of paper, and as I read it, the realization of a basic truth
came over me.  So simple!  So obvious, yet I had failed to see it.
Lab Kitburnt, the legendary circuits TA, the creator of the field now
known as fried electronics, had discovered how ICs work.  He says that
smoke is the thing that makes an IC work because every time you let
the smoke out of it, it stops working.  He claims to have verified
this with thorough testing.

I was flabbergasted!  Of course!  Smoke makes all things electrical
work.  Remember the last time smoke escaped from your 6.002 lab kit.
Didn't it quit working?  I sat and smiled like an idiot as more of the
truth dawned. It's the wires that carry the smoke from the smoke
supply to the lab kit. So if the wires were to spring a leak, nothing
would work properly because there wouldn't be enough smoke reaching
the lab kit. If there is a large smoke leak, the smoke supply would go
crazy trying to generate all that smoke and would itself spring a
leak.  But how could this be? Yes...of course! Smoke comes from a
fire, and more smoke means a larger fire. Kindling the fire too much
would melt the seals, allowing some smoke, and maybe even flames, to
escape. If the fire gets too hot (you bet you can feel it!), the smoke
supply's fuel cuts off, extinguishing the fire and stopping the smoke.

High wattage transistors require more smoke to operate properly, and
that's why the wires going to them are larger.  All that smoke also
tends to make them hotter, so they require a heatsink.  And yes, when
a power electronic circuit springs a leak, it lets out much more smoke
than a logic circuit.

But wait.. How does this fit in with all the device physics we have
been learning all along? What about all the electrons and such? Could
semiconductor theory be all wrong? Hmmm... I might be at the edge of a
breakthrough... Wow!!! To be able to prove Shockley wrong! On the
other hand, maybe I'm in trouble here. There may be a big loophole...
Wait... I'm getting it... Yes! Of course! How obvious! Electrons are
black. 
-- 
_______________________________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
From: an938@cleveland.Freenet.Edu (George II Lenzer)
Newsgroups: sci.electronics
Subject: Need pinouts for 1 MEG x 1 bit 100 ns DRAMS
Date: 16 Nov 1992 08:55:36 GMT
Organization: Case Western Reserve University, Cleveland, Ohio (USA)
NNTP-Posting-Host: slc4.ins.cwru.edu


	I have a few 1 Meg DRAMS that I would like to use in a 
memory expander.  To do this, I need pinouts.  Can anyone help me?

						Thanks in advance,
						George II Lenzer
-- 
"I'll let you in on a little secret.
	The whole universe is totally INSANE!!!!"
						Mr. Natural

Newsgroups: sci.electronics
From: zhenya@socs.uts.edu.au ( The Firefox.)
Subject: How to build noise reducer?
Organization: Computing Sciences, Uni of Technology, Sydney.
Date: 18 Nov 92 03:16:06 GMT

Does anyone have any ideas about the best way to build a device that takes
an input from an external microphone, shifts the signal 180 degrees out
of phase, and then re-emits it with little loss of resolution of the
waveform in the process?

It would be great if it could also work from frequencies of about 20Hz up...

Maybe there is a mail-order kit for something similar that someone know of?

Thanks in advance...
Zhenya.

--
Ring Bad News BBS - +61 2 587-8441
-------------------------------------------------------------------------------
| _    /| |`I am not	  |(Enter your next mistake?)% ping elvis |	  /// |
| \'o.0'  |  the Messiah!'| elvis is alive			  |	 ///  |
From: myers@hpfcso.FC.HP.COM (Bob Myers)
Date: Thu, 19 Nov 1992 19:20:00 GMT
Subject: Re: TI video DAC sources?
Organization: Hewlett-Packard, Fort Collins, CO, USA
Newsgroups: sci.electronics

In sci.electronics, haymoree@bones (Edward Haymore) writes:

> Any suggestions on where I can find a TI TLC5602 video DAC?
> 

Sure.  How about Texas Instruments?

No, seriously - look in the back of any T.I. data book, and you should be
able to find a list of distributors and worldwide T.I. sales offices.  Locate
the one nearest you, and ask them!


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.
From: richard@gecko.ee.byu.edu (Richard Christensen)
Newsgroups: sci.electronics
Subject: Police laser radar
Date: 20 Nov 92 11:38:10
Organization: Brigham Young University, Provo UT USA
Distribution: world
NNTP-Posting-Host: gecko.ee.byu.edu
Originator: richard@gecko.ee.byu.edu



Does anyone know what wavelength of laser they use?
I would imagine 1.3 or 1.55 microns.

Richard
Newsgroups: sci.electronics
From: vencill@iastate.edu (Tony Vencill)
Subject: 8051 C compiler wanted!!
Organization: Iowa State University, Ames, IA
Date: Fri, 20 Nov 1992 08:28:27 GMT

I'm looking for a C compiler for the 8051 and 8096 microcontrollers.  PD
would be nice, but anything inexpensive would work.  If anyone knows where
I could get such a package for any computer, I would appreciate it if you
would email me.  Thanks!

                                       Tony Vencill

                                          vencill@iastate.edu
From: john@django.think.com (John Richardson)
Newsgroups: sci.electronics
Subject: measuring milli-gauss a.c. magnetic fields
Date: 20 Nov 92 14:45:16
Organization: Thinking Machines Corporation, Cambridge Mass., USA
NNTP-Posting-Host: django.think.com

Does anyone know of a *simple inexpensive* circuit or device for
measuring milli-gauss a.c. magnetic fields? 

Thanks in advance,
John Richardson
--
John L. Richardson
Thinking Machines Corporation
john@think.com
805-964-6258
From: srgxnbs@grace.cri.nz
Newsgroups: sci.electronics
Subject: RE: 'DreamLight' wanted!
Date: Mon, 16 Nov 92 20:53:15 GMT  
Organization: Industrial Research Ltd., New Zealand.

>From: e92_anh@vaxkab.lne.kth.se ()
>Subj: 'DreamLight' wanted!
>Date: Mon, 16 Nov 1992 11:19:44 GMT
>
>On Sunday 15 November 1992, I was watching 'Beyond 2000' on Discovery
>channel. One of the wonders they were showing this time was an apparatus
>to -while you're sleeping- detect your REM's and then tell you that you
>are dreaming (by flashing lights in front of your eyes for a while).
>'DreamLight' I think it was called.
>
>The idea is that you ACTUALLY CAN PERCIEVE THIS while sleeping and thus
>get aware of the fact that what you are experiencing is, in fact, a
>dream! Well, hey! This sounds cool, does it not?
>
>Now, the reporter said that this device is something that anyone can buy
>and use. The problem is that 'Beyond 2000' is an American program (I
==================================================Australian
>think) and I live in Sweden. And as this 'DreamLight' has not yet found
>its way to Sweden, I'd be very happy if someone could tell me WHERE I
>CAN ORDER such a thing...
>
>(Secondly, does it work??)
>
>                                                         Andre'
>Heinonen, Royal Institute of Technology, Sweden
From: kingpin@mole.gnu.ai.mit.edu (Joe Smooth)
Newsgroups: sci.electronics
Subject: FOR SALE: Microcassette recorder
Date: 23 Nov 92 21:21:37 GMT
Distribution: sci
Organization: None

I have a Realistic 2-speed pocket microcassette recorder. It is quite used,
(slightly cracked cover - not really noticable), no wrist lanyard (not too
important), and no metal "sticker" on the back with the model number.

Although, this recorder _DOES_ work, despite the visible physical defects.
It sells new for $34.95 but I figure I might as well sell it for only $10,
because not many people want an ugly looking tape recorder..

It can be used for parts, too..

	If you are interested, please reply, and maybe we can work
something out.. remember, it DOES work! :)

			- Joe
From: jimc@tau-ceti.isc-br.com (Jim Cathey)
Newsgroups: sci.electronics
Subject: Re: Possible to upgrade PC from FCC Class B to A?
Date: 18 Nov 92 22:13:15 GMT
Organization: ISC - Bunker Ramo, Spokane, WA

In article <1992Nov17.200550.14479@netcom.com> nagle@netcom.com (John Nagle) writes:
>       Think of the alternative: long lists in the computer magazines of
>what interferes with what, running around offices with field strength
>meters trying to find out what's knocking what off the air, inability to
>use a computer and a TV in the same apartment building, landlords 
>prohibiting computer use...

Sort of like the configuration fun you get to have when keeping a
messy-DOS system running?

-- 
+----------------+
! II      CCCCCC !  Jim Cathey
! II  SSSSCC     !  ISC-Bunker Ramo
! II      CC     !  TAF-C8;  Spokane, WA  99220
! IISSSS  CC     !  UUCP: uunet!isc-br!jimc (jimc@isc-br.isc-br.com)
! II      CCCCCC !  (509) 927-5757
+----------------+
			One Design to rule them all; one Design to find them.
			One Design to bring them all and in the darkness bind
			them.  In the land of Mediocrity where the PC's lie.
Xref: sparky sci.electronics:19322 misc.forsale:31683
From: al@qiclab.scn.rain.com (Alan Peterman)
Newsgroups: sci.electronics,misc.forsale
Subject: Test Gear For Sale
Date: 21 Nov 92 17:27:46 GMT
Article-I.D.: qiclab.1992Nov21.172746.21861
Distribution: usa
Organization: SCN Research/Qic Laboratories of Tigard, Oregon.


                    Test Gear For Sale
 
Fluke 87 True RMS Multimeter.  4000 count instrument has LOTS of
features including frequency counter, Min/Max recording mode, Peak
capture, relative measurments, touch hold, capacitance measurement
and 4.5 digit display mode.  Top of the 80 series line, and includes
shock holster, books & probes.  $150.
 
HP 4935A Transmission Test Set.  A digital telecommunications tester
with built in variable tone generator (digital control), as well as
various standard noise and filter programs to test lines for signal
loss, noise, signal level and received frequncy.  Also has impulse noise
tests with timed sampling programs.  With case and leads.  This was in
the $8000 range new...so $400 ought to be a great deal!
 
-- 
Alan L. Peterman                                 (503)-684-1984 hm & work
                       al@qiclab.scn.rain.com
It's odd how as I get older, the days are longer, but the years are shorter!
Newsgroups: sci.electronics
Subject: HALL EFFECT SENSORS and CIRCUITS wanted
From: geoffrey@cosc.canterbury.ac.nz (Geoff Thomas)
Date: Tue, 24 Nov 1992 03:11:56 GMT
Organization: Computer Science,University of Canterbury,New Zealand

I'm looking for any info / references / etc. to Hall Effect devices
and circuits to use them. Any info much appreciated. Thanks.

Geoff Thomas
Newsgroups: sci.electronics
From: dmturne@ptsfa.PacBell.COM (Dave Turner)
Subject: Re: Tube primer?
Reply-To: dmturne@PacBell.COM (Dave Turner)
Organization: Pacific * Bell, San Ramon, CA
Date: Fri, 20 Nov 1992 01:03:22 GMT

In article <1992Nov19.212057.29180@mav.com> toddi@mav.com (Todd Inch) writes:
>>circuit also -- emitter is like cathode
>>		base is like grid
>>		collector is like plate.
>
>Except applying voltage to the grid decreases current flow from the cathode
>to plate while applying current to the base of a NPN (BJT) increases the
>collector-emitter current.  So, a tube works more like an FET from a practical
>standpoint.

That should read: "applying *negative* voltage" to the grid decreases current
flow....

Applying positive voltage to the control grid will increase current flow.




-- 
Dave Turner	(510) 823-2001	{att,bellcore,sun,ames,decwrl}!pacbell!dmturne
From: sl@nessie.mcc.ac.uk (Stuart Lea)
Newsgroups: sci.electronics
Subject: Do you know a phone chips that will do all these function ?
Date: 17 Nov 92 16:44:09 GMT
Organization: Manchester Computing Centre

Does a device which performs these functions exist ?

	General user telephone functions as well as:

	DTMF decoding, suitable for microprocessor decoding
	Output (TTL) indicating 
		
		engaged, 
		ringing out, 
		user pick-up ?

	I'm designing an answerphone and I need a device which will do all 
	of these functions.

	
Please email me direct as my newsfeed is flaky

Thanks


-- 
+Stuart Lea---Tel:061 200 4809--Fax:061 200 4019---UMIST University-----------+
| JANET   :   sl@uk.ac.mcc.nessie                  B22, Main Bldg., PO Box 88 |
| INTERNET:   sl%nessie.mcc.ac.uk                  Manchester, UK M60 1QD     |
|                 "Weather is here, wish you were beautiful"                  |
Newsgroups: sci.electronics
From: rubin@skiing.cis.ohio-state.edu (Daniel Rubin)
Subject: Sega Genesis Guts And Operation...
Organization: The Ohio State University Dept. of Computer and Info. Science
Date: Wed, 18 Nov 1992 00:58:37 GMT

Anyone know anything about the Sega Genesis game console?  I opened one up
and there is some interesting stuff inside.  A 68000 microprocessor, a 
Z80 microprocessor, a couple large Sega chips ( each surface mount with about
25 pins all all four sides ), A yamaha chip ( I imagine for sound ), several
Sony chips ( video? ) and a 53 MHz clock.  I really didn't see any memory
chips, but maybe I just didn't look hard enough...

Anyone know about the architecture of this machine.  Why two microprocessors?

								- Dan

-- 

             Daniel Joseph Rubin     rubin@cis.ohio-state.edu 
     
                       GO BENGALS!      GO BUCKS!
From: mpaul@unlinfo.unl.edu (marxhausen paul)
Newsgroups: sci.electronics
Subject: Re: telephone humm any solution...
Date: 16 Nov 1992 14:34:26 GMT
Organization: University of Nebraska--Lincoln	
Distribution: world
NNTP-Posting-Host: unlinfo.unl.edu

Just an informational note, kind of related...I was going nuts because my
cordless phone, which used to work fine, started giving me prohibitive
amounts of hum, noise, and interference...couldn't figure it out, then one
day it worked great but went bad again in the evening, so I knew it was
intereference....went around turning things off and on until I discovered
the new circular fluorescent lamp with electronic instant-on type ballast
was kicking out tons of interference - made my guitar amp noisy, too.  Any
quick way to kill this?  (My boss says drop a small cap across the AC at
the lamp....)

--
paul marxhausen .... ....... ............. ............ ............ .......... 
 .. . .  . . . university of nebraska - lincoln .  . . .. . .  .. . . . . . . .
 .     .    .  .   .     .   .  .    .   .  .   .    .   .  grace .   .    .  . 
   .         .       .      .        .        .      .        .   happens .     
Newsgroups: sci.electronics
From: henry@zoo.toronto.edu (Henry Spencer)
Subject: Re: Telephone Number scanner
Date: Wed, 18 Nov 1992 23:53:21 GMT
Organization: U of Toronto Zoology

In article <92322.005201U53817@uicvm.uic.edu> <U53817@uicvm.uic.edu> writes:
>Anyone heard of a program which when using a standard 2400 modem (Hayes AT
>  commands, etc.) which tells you the incoming telephone number?

Can't be done.  The information is not available to the modem.

It's not available to *anything* on your end of the phone line unless you
pay the phone company for "caller ID", which is an optional extra-cost
service.  Once you've done that, suitable equipment can pick it up.  Some
of the very newest modems can do this, but old ones can't.  The signalling
conventions are odd (more precisely, archaic), and the modem has to listen
to the line *before* picking up the phone, which old ones can't do.
-- 
MS-DOS is the OS/360 of the 1980s.      | Henry Spencer @ U of Toronto Zoology
              -Hal W. Hardenbergh (1985)|  henry@zoo.toronto.edu  utzoo!henry
From: aq456@cleveland.Freenet.Edu (Terry Quinn)
Newsgroups: sci.electronics
Subject: Need IC
Date: 21 Nov 1992 16:21:07 GMT
Organization: Case Western Reserve University, Cleveland, Ohio (USA)
NNTP-Posting-Host: hela.ins.cwru.edu


I am looking for an IC, a Mostek MK5017.  This is a relatively
old chip, used in a Heathkit GC-1005 electronic alarm clock.
I've contacted Heath and a couple of companies (ECG, and SGS
Thomson who bought Mostek) and none sell the 
chip anymore.  Therefore I would be willing to buy a used one
if someone has one.  Please send response by email.  Thank you
-- 
                                    Terry Quinn
                                     Germantown Hills, IL
                                      tquinn@heartland.bradley.edu
                                       aq456@cleveland.freenet.edu 
Newsgroups: sci.electronics