HDTenEightyP/NetNews huggingface dataset:
From: schuch@phx.mcd.mot.com (John Schuch)
Subject: The My Idea Clause, was Big NASTY RS
Keywords: employment practices
Organization: Motorola Computer Group, Tempe, Az.
Date: Sat, 21 Nov 1992 12:36:52 GMT

In article <1992Nov20.203319.27826@u.washington.edu> pollock@milton.u.washington.edu (Joe Pollock) writes:
>
>     It appears that Tandy/Radio Shack lays claim to anything [an employee]
>may>develop, even on [his] own time, that may be in any way related to [his]
>employment at Radio Shack.  

Here at Motorola, we are required to sign a very simular document upon
employment (somewhere inbetween the interview and the 'whiz quiz') Even
the janitors and cafeteria people have to sign. I guess the corporation
wants to make sure they have every right the 'Left Handed Ergonomic
Semi-Automatic Mop Wringer/Pail With Attached Lunch Box.'

How many other companies out there require this?

John




-- 
| ONE LINE NOVEL: She backed away from the corpse slowly, not so much out  |
| of fear, but simply unsure of what the crowd expected her to do with it. |
+--------------------------------------------------------------------------+
| John R. Schuch  -  Motorola Computer Group  -  Manufacturing Engineering |
Newsgroups: sci.electronics
From: franzoni@sixter.var.dec.com (Mauro Franzoni)
Subject: Re: 68HC11 Floating Point Routines
Reply-To: franzoni@sixter.var.dec.com (Mauro Franzoni)
Organization: Digital Equipment Corporation
Date: Tue, 17 Nov 1992 13:53:42 GMT

In article <1992Nov9.214242.11948@nntp.hut.fi>, sakaria@vipunen.hut.fi (Sakari
Aaltonen) writes:
|> The source code is available for ftp, too. Somewhere there's an .edu
|> site that has rather a lot of HC11 stuff. You guessed it: I can't remember
|> the name of the site...

try calvin.stanford.edu or elden.cse.nau.edu
From: srgxnbs@grace.cri.nz
Newsgroups: sci.electronics
Subject: RE: Help with refresh/record scheme needed!
Date: Tue, 17 Nov 92 21:19:13 GMT  
Organization: Industrial Research Ltd., New Zealand.

>From: Ernie Oporto <EAO102@psuvm.psu.edu>
>Subj: Help with refresh/record scheme needed!
>Date: Tue, 17 Nov 1992 00:22:18 EST
>
>Well, now that I got the pin-outs for those 41256 DRAM chips, I'm going
>to need help figuring out how to do the refresh cycles.  I'm stumped on
>this one, folks.  I'm continuously recording voice/sound for 8 seconds,
>yet the DRAMs need to be refreshed about every 4ms.  I understand that I'll
>probably have to interleave the refresh and memory read/write cycles, but
>I don't know how.  If anyone can give me clue as to what kind of scheme I
>should use for this, let me know.  I have 3 clocks available to use in my
>system for the refresh cycle: 640000Hz, 320000Hz and 40,000Hz.  I figure
>it would be best to use the first one, but even if I do all the refresh
>at once, I'd still end up with a gap in the sound and some of the memory
>going bad.  How do they do it in those tapeless answering machines?

Its a long time since I played with DRAMS, but I would think that with 
a bit of judicious programming you may be able to avoid a refresh 
circuit. As long as you access all rows (columns?) within 4 ms the ram 
gets refreshed, so while you're recording you'll be refreshing anyway, 
ditto for playback. The rest of the time you could possibly arrange an 
interrupt routine every 4 mS to just read the necessary number of 
addresses if you can't build it into your program. If this is all B.S. 
then someone please say so :)
bruce
>---
>"See how I LOVE to clean FEEEELTHY CATBOXES!!!!"  -- Ren
>  _____)           ______        _)       _)  EAO102@PSUVM.PSU.EDU
>                               __       __    OPORTO@CORVETTE.ECE.PSU.EDU
>______    ______            ___      ___      Ernie "SHOKK" Oporto
>                               __       __    Computer Lab Attendant
>(_______ _      _ ________ _     _) _     _)  for PSU's CAC Department
From: wb8foz@skybridge.SCL.CWRU.Edu (David Lesher)
Newsgroups: sci.electronics
Subject: Re: Tube primer?
Date: 22 Nov 1992 00:10:29 GMT
Organization: NRK Clinic for habitual NetNews abusers - Beltway Annex
Reply-To: wb8foz@skybridge.scl.cwru.edu (David Lesher)
NNTP-Posting-Host: skybridge.scl.cwru.edu

Others said
# So, a tube works more like an FET from a practical
# standpoint.

Sigh....
Am I the only one on the Net old enough to recall FETs being
explained as working just like tubes......

--
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
From: d2bohre@dtek.chalmers.se (Henrik Bohre)
Newsgroups: sci.electronics
Subject: Death of remote controls
Keywords: remote
Date: 18 Nov 92 14:18:36 GMT
Organization: Chalmers University of Technology, Gothenburg Sweden

Someone wondered about the mortality of TV, VCR (and so on) remote controls.
I don't know if this is what has happened to you, but I have resurrected
a couple of dead remote controls wich all had died of the following disease:

The transmitter usually have som sort of ceramic resonator. I'm not sure, but 
it seems to me that the vibrations from the resonator destroys the solderings 
around it. Anyway, the solution was to solder the resonator back to the pcb.


Yours

  Henrik Bohre

  @>-+--
Newsgroups: sci.electronics
Subject: Re: bandpass filter
From: dlr@testeng.ksc.nasa.gov (Doug Reed)
Date: 17 Nov 92 16:25:16 EST
Organization: Voice Systems Engineering, Kennedy Space Center

In article <1d5lraINNp3f@moe.ksu.ksu.edu> hampster@phys.ksu.edu (Kip J. Mussatt) writes:
>In <1d3p0oINNlu3@moe.ksu.ksu.edu> hampster@phys.ksu.edu (Kip J. Mussatt) writes:
>
>>I am looking to make a high Q, low bandwidth filter, bw = Hz with 
>>a center frequency of 25 Hz.  Burr-Brown makes some active filter
>>chips, but they don't look too impressive, they are 16 pin and still
>>require 4 external resistors.  Each chip only produce a two-pole filter
>>effect.  I need to pass the 25+/-10 Hz signals and NOT pass at all
>>any surrounding 10Hz or 60 Hz signals that are present in the line,
>>if this helps.   Does anyone know of any place /source of such a 
>>possible filter?  
>Just so this is clear, I don't want to process the signals via a uProc.
>I'm looking for something that is very real time, since Im only looking
>for the signals within a certain band, I don't really want to do spectral
>analysis. 
>>-Kip J. Mussatt

Kip:
Check out TTE's active 3 pole Butterworth active filters. They seem 
that they might be just what you're looking for. Contact them at
(213) 478-8224, Los Angeles. In their catalog vol. 34, check out page
5-5.

Regards, Doug

-- 
+-----------+---------------------------------+--------------------------+
| Doug Reed | HP3065AT Board Test Engineering | Kennedy Space Center, FL |
+-----------+----+---------------------------++--------------------------+
| Ham Call N4QVY | #include <std_disclaimer> | Lockheed Space Operations |
Newsgroups: sci.electronics
From: pierson@ggone.enet.dec.com (Dave Pierson)
Subject: Re: Possible to upgrade PC from FCC Class B to A?
Organization: Digital Equipment Corporation
Date: Mon, 16 Nov 1992 23:19:53 GMT

In article <1992Nov16.213442.3829@julian.uwo.ca>,
wlsmith@valve.heart.rri.uwo.ca (Wayne Smith) writes, in part:

>Why bother?  I mean, does the FCC actually police that kind of thing?
	Yes.  They have seized "millions and millions" of units and taken them
	off the marketplace.

>How many PC's are sold in warehouse and deptartment stores now?  Are
	Many.  FCC polices where it can.

>they class A?  Just how does the FCC get involved with the sale of
	I THINK spmepnes got it backwards.  Class A is noisier, Class B is
	quieter.

>electronic equipment?
	If it has "high speed" clock, they get to regulate it.  They have for
	years (about 10...)  They responded to a rising tide of consumer and RF 
	spectrum users about rfi from the large number of "digital" devices.
	They get to police radiators (of RF...)

>  Like, is it illegal to sell something that
>doesn't have an FCC Class?  How many mom & pop computer stores are
	You betcha.  Practically, they go after "big" names, but they do seize,
	they do destroy.

>building pc's from the case up?  
	Nope, they probably slide by.  Like speeding laws, some get caught,
	some get by.

dave pierson			|the facts, as accurately as i can manage,
Digital Equipment Corporation	|the opinions, my own.
40 Old Bolton Rd		|I am the NRA.
Stow, Mass		01775	pierson@msd26.enet.dec.com
"He has read everything, and, to his credit, written nothing."  A J Raffles
Newsgroups: sci.electronics
From: u009@csx.cciw.ca (G. Stewart Beal)
Subject: Re: imaging systems wanted
Organization: Canada Centre for Inland Waters
Date: Mon, 23 Nov 1992 16:29:06 GMT

In article <8708@lee.SEAS.UCLA.EDU> annette@curtiss.seas.ucla.edu (Annette K. Nasif) writes:
>
>     Hello, I am looking for information about a camera (still-life, not
>video) that can digitalize a picture and then have that image transmitted
>to a receiver.  A name of a company or manufacturer that carries digital
>cameras would be especially helpful, but I would deeply appreciate anything
>you know.  Thanks!                               Annette
>                                                 annette@seas.ucla.edu
>
I don't know if Robot Research is still developing for the consumer field,
but they have (had) a unit called the R1200C Color Slow Scan TV Converter.
It takes standard NTSC color video, frame grabs on command, then transmits
the data as a bunch of warbling audio tones (suitable for phone or radio
use). The technology is quite advanced now in the Amateur Radio community.
If you want further info on SSTV, email me.
 
Regards, Stu Beal, VE3MWM, U009@CS.CCIW.CA,
National Water Research Institute, Burlington, Ontario, Canada.
 
"A blockbuster, a towering - no more than that, an overtowering novel
 that has all the ingredients (well, some of them) of great fiction."
 


Xref: sparky sci.electronics:19185 rec.audio:15369
From: dino@inqmind.bison.mb.ca (Tony stewart)
Newsgroups: sci.electronics,rec.audio
Subject: Re: Setting HiFi system gain in amp feedback loop?
Date: Thu, 19 Nov 92 02:12:40 CST
Organization: The Inquiring Mind BBS  1 204 488-1607

francis@cs.adelaide.edu.au (Francis Vaughan) writes:

> A curious question has been nagging me.  When one looks at a
> HiFi system the signal levels are as a rule fairly low,
> certainly domestic equipment is designed with levels
> significanlty lower than professional equpiment, and a
> domestic system is very rarely run with the volume knob
> wound up all the way.
> 
You can't use a high gain pre-amp & power amp with negative feedback on 
the combined stages.
a
The reason you haven't seen it is that it won't work. You can't treat the 
pre-amp and power amp as an OPAMP and use negative feedback. The are too 
many stages and your circuit would be unstable.  Neg feeback is limited 
to power amps or preamps, but cannot be applied easily to both combined, 
with reactive non linear loads (speakers).
Better Amps use ganged pots to control attenutation of 2 stages, that 
power noise level is reduced at low levels.


dino@inqmind.bison.mb.ca
The Inquiring Mind BBS, Winnipeg, Manitoba  204 488-1607
From: rwc@g3.ius.cs.cmu.edu (Randy Casciola)
Newsgroups: sci.electronics
Subject: Re: Surface mount device prototyping
Date: 20 Nov 92 12:23:37 GMT
Article-I.D.: cs.By0L3D.LD8.2
Organization: CMU Vision and Autonomous Systems

In article <rda735z.722158097@nella16.cc.monash.edu.au>, rda735z@nella16.cc.monash.edu.au (Simon Cocking) writes:
> I just got some specs for the MC68HC16Z1, and it looks like there is only a
> PQFP / PQFP in a molded carrier ring package available.  My question is,
> how would one go about prototyping (read wirewrapping) with one of these?
> Are there sockets available which take these devices?  Or am I going to have
> to construct a small daughter board to mount it on?
> 
> Thanks,
> Simon.
> -- 
> +---------------  Simon Cocking, sgc@yoyo.cc.monash.edu.au  -------- /// -+
> |               Robotics & Digital Technology / GAUnix Group        ///   |
> |                             Monash University                 \\\///    |
> +-------------------------  Melbourne, Australia.  ------------- \XX/ ----+

Antona Corp. in Los Angeles makes sockets mounted on PCBs with wire wrap wire coming
through the bottom.  We bought the 100 pin PQFP version.  It was very expensive.
$84.00.  Their number is 310-473-8995.

Randy Casciola
Research Engineer
The Robotics Institute
Carnegie Mellon University
Pittsburgh, Pa 15213
Newsgroups: sci.electronics
From: johnh@macadam.mpce.mq.edu.au (John Haddy)
Subject: Position Tracking in 3D
Organization: Macquarie University, Sydney
Date: Fri, 20 Nov 1992 05:32:07 GMT


In an earlier post, I mentioned a product I saw at a trade show which allows
tracking of an object in 1, 2 or 3 dimensions. At the time, I did not have the
product details to hand.

Now, thanks to the Australian distributor, I have more information, for those who
expressed an interest.

The product is called V-scope, and uses a combined ultrasound/infrared system for
control and ranging from each of three base stations (for 3D motion) to a small
mobile transponder. The transponder "button" weighs 13.5 gm and is 26x26x17mm in
size.

Manufacturer:
	Litek Advanced Systems Ltd.,
	14 Raoul-Wallenberg St.
	Tel Aviv, ISRAEL

	Contact:	Yosi Eliav
	Ph:		(country) + 349 3945

U.S.A.:
	Celesco Transducer Products
	7800 Deering Avenue
	Canoga Park
	California, USA 91304

Australia:
	IDM Instruments Pty. Ltd.,
	6 Carmen St.,
	Dandenong
	Victoria, AUSTRALIA, 3175

	Ph:	(61-3) 706 7837
	Fax:	(61-3) 706 7249

JohnH

----------------------------------------------------------------------------

      |  _  |_   _   |_|  _   _|  _|              Electronics Department
    |_| (_) | | | |  | | (_| (_| (_| \/           School of MPCE
    ---------------------------------/-           Macquarie University
                                                  Sydney, AUSTRALIA 2109

    Email: johnh@mpce.mq.edu.au, Ph: +61 2 805 8959, Fax: +61 2 805 8983

----------------------------------------------------------------------------
Newsgroups: sci.electronics
From: sehari@iastate.edu (Babak Sehari)
Subject: Re: 4N25 pinout, please.
Originator: sehari@class1.iastate.edu
Organization: Iowa State University of Science and Technology, Ames, Iowa.
Date: Sun, 15 Nov 1992 17:35:49 GMT

In <tooraj.721835315@daneel.rdt.monash.edu.au> tooraj@daneel.rdt.monash.edu.au (Tooraj Enayati) writes:


>I am having problem finding the pinout for 4N25/4N28.
>Could some one please send me the pinout for it. 

>I need to switch a circuit on when the phone is ringing.
>Is 4N25 suitable for that. I  think I should be able to
>get it to drive a Triac or a Diac, or at worst a relay.

>Any help or comments much appreciated.

>Best of regards
>-- 
>==============================================================================
>Tooraj Enayati     Melbourne     Australia     tooraj@daneel.rdt.monash.edu.au
>Monash University       Robotic and Digital Technology       (Graduate/Alumni)
>==============================================================================

This an Optoisolator with NPN transistor for output and has following 
characteristics:

VISO = 7500 V (Isolation Voltage)
PT  =  250 mW  (Total Power)
CTR  = 20 % (Current Transfer Ratio)
If = 80 mA (Maximum Forward Current)
Vr = 3 V (Maximum reverse Voltage)
BVCBO = 70 V  (Max. Collector to base Votage)
BVceo = 30 V (Max. Collector to Emitter Voltage)
IC  = 100 nA (Max  Collector Dark Current)



                        4N25/4N28
                      ----------------
               Anode -|1-|   |------4|- Base
                      |  PD  |       |
             Cathode -|2-|   |   /--5|- Collector
                      |      | -|    |
                     -|3         \--6|- Emitter
                      ----------------

If you want a regular ring indicator try Motorola's Tone ringers:

MC34012
MC34017
MC34117

                 With highest reagards,
                      Babak   Sehari.
--
Organization: Queen's University at Kingston
Date: Tue, 17 Nov 1992 01:54:27 EST
From: <LAMC@QUCDN.QueensU.CA>
Newsgroups: sci.electronics
Subject:    Test Bed for Solar Cells

I am just wondering how people usually do to test the efficiency of solar cells
. Would a 60W bulb good enough as a constant intensity source? What are the
measurements to determine the efficiency, the peak power point or the open
circuit voltage and short circuit current?

From: myers@hpfcso.FC.HP.COM (Bob Myers)
Date: Tue, 17 Nov 1992 00:29:28 GMT
Subject: Re: Inductors
Organization: Hewlett-Packard, Fort Collins, CO, USA
From: mcovingt@aisun3.ai.uga.edu (Michael Covington)
Subject: Re: Help with a simple dc amplifier circuit
Organization: AI Programs, University of Georgia, Athens
Date: Sun, 15 Nov 1992 22:37:01 GMT

If I understand you right, you want to get 12 volts out from something
that has a 9-volt power supply.

That's not an amplifier.  Amplifiers produce output voltages no higher
than the power supply voltage.

What you want is to convert the DC into AC, run it through a transformer
or a diode-capacitor voltage multiplier, and filter it back to get smooth
DC again.  That kind of circuit is called a DC-to-DC converter.

-- 
:-  Michael A. Covington     internet mcovingt@uga.cc.uga.edu 
:-  Artificial Intelligence Programs       phone 706 542-0358
:-  The University of Georgia                fax 706 542-0349
:-  Athens, Georgia 30602-7415 U.S.A.     amateur radio N4TMI
Newsgroups: sci.electronics
From: chenh@neptune.ecs.csus.edu (H. Philip Chen)
Subject: Databook on the BBD chips?
Organization: California State University, Sacramento
Distribution: na
Date: Wed, 18 Nov 92 10:36:20 GMT


Hi, can netters kindly tell me what's the actual title or P/N
of the databook that covers the Panasonic line of BBD/ASR chips?
I'll be ordering a copy from the local parts store here.

Thanks in advance for the info.

-phil

ps. I understand that DigiKey has that item, but I'm trying to
    avoid their $5 shipping/handling fees (on a $3.50 databook).
Newsgroups: sci.electronics
From: vnelson@ccu.umanitoba.ca (Gerald Vernon Nelson)
Subject: Re: Good cheap 19" racks - where 2 buy ???
Organization: University of Manitoba, Winnipeg, Canada
Date: Wed, 18 Nov 1992 02:22:59 GMT

In <1992Nov17.170708.24575@b30.ingr.com> medin@catbyte.b30.ingr.com (Dave Medin) writes:

>In article <41117@sdcc12.ucsd.edu>, ee154fbk@sdcc15.ucsd.edu (M) writes:
>|> Need to stuff all my rackmount modules into a rack.  Anybody know of
>|> any good sources for such things???

>If you don't need something in such good shape that it qualifies as
>living room furniture, I've found that the best source is government
>auctions. The drawbacks include the fact that auction goods vary from
>auction to auction, and may not be held in your proximity. But, I've gotten
>some great 19" racks for $10, including ergonomic tilting racks (on casters
>no less). Depending on the contents of the auction, you can find great
>test equipment there, too.

Another good source, phone up the computer services department
of your local universities, colleges, and long time mainframe users.

Youd be amazed at how many PDP-11's, terminals, and general electronics
junk is free for the hauling.  The stuff has been written off the books
and no-one will give them any money for it.  Sometimes you have to PAY
people to take it away.  

Vern Nelson
From: ken@sugra.uucp (Kenneth Ng)
Newsgroups: sci.electronics
Subject: Re: 'DreamLight' wanted!
Date: 19 Nov 92 03:59:09 GMT
Organization: Private Computer, Totowa, NJ

In article <1992Nov16.111944.4390@kth.se: e92_anh@vaxkab.lne.kth.se () writes:
: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
:think) and I live in Sweden.

I think its an Austrilian program.

-- 
Kenneth Ng
Please reply to ken@eies2.njit.edu for now.
Apple and AT&T lawsuits: Just say NO!
Newsgroups: sci.electronics
From: louis@cpd.Tandem.COM (Louis Meadows)
Subject: Have old (50's) 19" radio station rack 
Organization: Tandem Computers Inc., Cupertino CA
Distribution: ba
Date: Thu, 19 Nov 1992 01:07:07 GMT


  I hate to get rid of it, but its taking up room in the Garage.  It stands
6' tall and has rear door.  No side or front doors.  It is in the classic 
50's style with rounded corners.  The rack was from a LA radio station.
It was designed for drop power cords and made of US Steel.  It is on rollers
to make moving it easier.   If you need one and don't want to pay big bucks,
it's yours for $20 (so you will use it!).  All you have to do is come to 
Santa Cruz and get it.  I don't want to see it jucked.   It is a classic and
needs a good home.  


   Louis
Organization: University of Illinois at Chicago
Date: Tuesday, 17 Nov 1992 00:52:01 CST
From: <U53817@uicvm.uic.edu>
Newsgroups: sci.electronics
Subject: Telephone Number scanner

Anyone heard of a program which when using a standard 2400 modem (Hayes AT
  commands, etc.) which tells you the incoming telephone number?

Thus, I could leave my computer on with the special incoming number receiving
  program running and it would tell me what the telephone number was for the
  incoming call.

Any details...

u53817@uicvm.uic.edu
Xref: sparky sci.electronics:19277 sci.engr.control:298
From: bertrand@eiffel.com (Bertrand Meyer)
Newsgroups: sci.electronics,sci.engr.control
Subject: Inverted curriculum: references requested
Keywords: Electrical engineering education
Date: 20 Nov 92 15:54:50 GMT
Followup-To: poster
Organization: Interactive Software Engineering, Santa Barbara CA

I have a 5-page summary of a report by Prof. Cohen from
the City University of London on a teaching strategy called
the ``inverted curriculum''.

I would be grateful to anyone who could give me a more precise
reference (e.g. journal articles) to this work, and perhaps
even Prof. Cohen's e-mail.

We do not receive the sci.electronics and sci.engr.control
newsgroup, so help in the form of an e-mail reply will be appreciated. 

Thanks in advance.

-- 
-- Bertrand Meyer
Interactive Software Engineering Inc., Santa Barbara
bertrand@eiffel.com
Newsgroups: sci.electronics
From: greyham@research.canon.oz.au (Graham Stoney)
Subject: Re: EM radiation from power lines
Organization: Canon Information Systems Research Australia
Date: Tue, 24 Nov 1992 02:21:16 GMT

orville%weyrich@uunet.uu.net (Orville R. Weyrich) writes:
>In article <1992Nov3.021632.22139@ke4zv.uucp> gary@ke4zv.UUCP (Gary Coffman) writes:
>>                          EM field strength falls off with the square of
>>the distance from the source. So the power lines, being much further away,
>>produce much weaker fields in your home than the fields generated by the 
>>wiring and devices inside your home. A hair dryer held next to your head
>>generates a field 100,000 times stronger in your body than a distribution 
>>line a 100 feet away, buried or not.

>AH-HA! a use for my physics course in electromagnetics! :-)

>What you say is true for point sources [EM field inversely proportional
>to the square of the distance]. But power lines are DEFINITELY NOT
>point sources. For all practical purposes, they are "line sources"
>and their field strength ins inversely proportional to the distance. Hence
>the field strength is considerably stronger than that predicted by the
>inverse square.

Orville is spot on here; but a major point is that power lines and wires are
radiating continually, whereas that hair dryer is on only a tiny fraction of
the time. If you sleep with an electric blanket[1], it will give by far the
largest dose of EM radiation over a lifetime because it's so close and it's
on for so long.

(Also, Gary's calculation is incorrect: 100 squared is 10 000, not 100 000).

regs,
Graham

1. Studies have shown a link between extended exposure to EM radiation (at
   levels experienced from an electric blanket) and a reduction in production
   of a body chemical which is suspected of being a cancer inhibitor.
   I wouldn't sleep with an electric blanket on if I were you.
Newsgroups: sci.electronics