HDTenEightyP/NetNews huggingface dataset:
From: hanke@nessie.cs.id.ethz.ch (Norbert Hanke)
Subject: Re: Student version of SPICE???
Organization: Swiss Federal Institute of Technology (ETH), Zurich, CH
Date: Fri, 9 Oct 1992 18:11:37 GMT

In article <1992Oct9.143138.203047@uctvax.uct.ac.za> clrmic08@uctvax.uct.ac.za writes:
>Is there a student or demo version of SPICE around. If so where can I get 
>a copy from ? An FTP site would be the most convenient. 
>Thanks
>Mike

Look at SIMTEL20 or mirror sites in directory ELECTRICAL. There are the
files PSPICE5A/B/C.ZIP. A and B contain the simulator, C the windows
front-end with schematic entry.

Norbert Hanke
ETH Zurich, Switzerland
From: dlc@arco.com (Dane Cantwell)
Newsgroups: sci.electronics
Subject: Portable Cell Phones?
Date: 9 Oct 92 00:45:29 GMT
Article-I.D.: Arco.1992Oct9.004529.11273
Reply-To: dlc@arco.com
Organization: ARCO Oil and Gas Company (Midland, Tx.)

I am in the need of a small cellular phone. I was wondering what experience
people have had with the very small hand held models.  Does the lower RF output
result in significantly reduced range?  How much use do you really get out of
the batteries before recharge, etc??  Any specfic brand/model recommendations.

Thanks,
-Dane

-----------------------------------------------------------------------
Dane L. Cantwell   ARCO Oil and Gas Company      Midland, Texas  
dlc@arco.com            	       	  	 (915) 688-5625
-----------------------------------------------------------------------
Newsgroups: sci.electronics
From: luckey@rtfm.mlb.fl.us (Jon Luckey)
Subject: Re: C Cross Complier for 68HC11 
Organization: We don't need no stinkin' batches!
Date: Mon, 12 Oct 1992 06:57:32 GMT

iqbal@pawnee.eel.ufl.edu (M.Iqbal) writes:


> The subject says all. If you any sources then please email the
>pointer to me.

Well, if you have the money, you can get many cross-compilers
from Avocet.

Prices as of June 92 were $1095 for an MSDOS version and
(apparently, but the catalog is confusing) $2,245 for Sun/SPARC

Avocet
120 Union St
P.O. Box 490
Rockport Maine 04856
800-448-8500

Many of the Avocet compilers are products of an Australian 
company called Hi-Tech.  I belive that Avocet does make
modifications to the product in house though.  I have been
buying direct from Hi-Tech ever since I found them advertising
a Z80 cross compiler in Dr Dobbs Journal for $199.  The last
version I bought from them was in the $495 range I think so
I would suggest that you give them a call.  I was very pleased
with their product.

Hi-Tech Software
P.O. Box 103
Alderley QLD
4051 Australia
PH (07) 300 5011  International+61 7 300 5011
Fax (07) 300 5246 International+61 7 300 5246

Lines: 14
Date: Fri,  9 Oct 92 13:45:44 MDT
From: richard@ee.byu.edu (Richard Christensen)
Newsgroups: sci.electronics
Distribution: world
Organization: Brigham Young University, Provo UT USA
Subject: Car antenna design help wanted


I want to design a better car stereo antenna system. The 
system would include impedance matching elements, baluns, 
and an amplifier.  My question is, does anyone have a good 
book on how the antenna works on a car.  Almost all books 
on antenna theory, do not include anything about the car 
antenna system.  For instance, I understand that the antenna 
is capacitively loaded. Do the receivers anticipate and 
match the antenna correctly, or do they just live with 
the mismatch?  Does the antenna impedance match the 
impedance of the feed cable or the receiver?  Any help 
would be greatly appreciated.

Richard@newt.ee.byu.edu
Newsgroups: sci.electronics
From: rvirani@doppler.NoSubdomain.NoDomain (Rudi Virani(co-op))
Subject: help
Organization: Ryerson Polytechnical Institute
Date: Thu, 15 Oct 1992 14:19:22 GMT

Keywords: 

I'm working at the Centre for Advanced Technology Education at Ryerson Poly Tech in Toronto. 
I'm going to be starting a hardware related project soon but I still have lots to learn. 
Does anybody know of a good beginners book on microcontroller design; machine language;
programming micro's etc.  It would be much appreciated.
From: ornitz@kodak.kodak.com (Barry Ornitz)
Newsgroups: sci.electronics
Subject: Re: 25 ohm coax cable
Summary: cables in parallel
Keywords: coax cable
Date: 8 Oct 92 17:27:39 GMT
Article-I.D.: kodak.1992Oct8.172739.2700
Followup-To: sci.electronics
Organization: Eastman Chemical Company

In article <1992Oct8.120225.6247@fys.ruu.nl> vreeburg@fys.ruu.nl 
(Jurriaan Vreeburg) writes:
>After reading Gary's answer I had some doubt of its correctness. It implies
>that by putting two 50 Ohm coax cables in series, one is able to create a 
>100 Ohm coax cable, which is certainly not true.
>
>I think that putting two cables in parallel doesn't change the impedance, since
>the impedance is defined as:
>
>                   L
>Z = square_root ( --- )
>                   C
>L: inductance per unit length
>C: capacitance per unit length
>
>What happens if we put two cables in parallel: both the inductance and the 
>capacitance
>increase by a factor of two -> Z doesn't change!!! Putting two cables in 
>series doesn't
>change the impedance as well, since L & C are defined per unit length, which 
>don't
>change at all in that case.

Connecting two 50 ohm cables in parallel does half the characteristic
impedance as seen from the input and output.  The inductance per unit length
is half of what it was for a single cable is and the capacitance per unit 
length is twice that of a single cable.  The net change in characteristic
impedance is defined by your formula, one half of that of the single cable.

Remember that the inductance of the wires is a series term, thus two wires in
parallel will decrease the inductance.  The capacitance of the cable is a
shunt capacitance, thus two cables in parallel will increase the capacitance.


						Barry
 -----------------
|  ___  ________  |       Dr. Barry L. Ornitz          WA4VZQ
| |  / /        | |       Eastman Kodak Company
| | / /         | |       Eastman Chemical Company Research Laboratories
| |< < K O D A K| |       Process Instrumentation Research Laboratory
| | \ \         | |       P. O. Box 1972, Building 167B
| |__\ \________| |       Kingsport, TN  37662       615/229-4904
|                 |       INTERNET:   ornitz@kodak.com
 -----------------
From: an938@cleveland.Freenet.Edu (George II Lenzer)
Newsgroups: sci.electronics
Subject: Texas Instruments data needed
Date: 12 Oct 1992 08:41:57 GMT
Organization: Case Western Reserve University, Cleveland, Ohio (USA)
NNTP-Posting-Host: slc10.ins.cwru.edu


	I plan to upgrade my computer's memory using TI SIMMS.
I need to get "pin" numbers so I will know what gets connected
to what.  If anyone has a TI phone number or can provide me with 
the info I need, please E-mail me.  The recommended SIMMS are 1 Meg
120 ns SIMMS.
						George II Lenzer
-- 
"I'll let you in on a little secret.
	The whole universe is totally INSANE!!!!"
						Mr. Natural
From: hazelton@mizar.usc.edu (John W. Hazelton)
Newsgroups: sci.electronics
Subject: Re: Voice-operated Universal Remote Control
Date: 15 Oct 1992 03:09:33 -0700
Organization: University of Southern California, Los Angeles, CA
NNTP-Posting-Host: mizar.usc.edu

I heard the same advertisement a couple of months ago.  The remote
control is sold by Voice Powered Technology in Canoga Park, California.
It does indeed work from voice command.  It is a very simple looking
device with a microphone built into it.  It appears that you program
it with your voice when you first receive it (get it to learn how you
say "one," "two," "Monday," "AM," etc.).  It then acts a lot like a
VCR+ Plus, in that it controls the VCR as long as you have the thing
pointed at your VCR while you are gone.

Its memory stores up to 15 programs as much as 60 days in advance.  The
literature they send you doesn't mention a price.  I think they want the
freedom of changing it, depending on how well sales go.  When I called
them a month ago, they were asking $149 for it.  That was a bit too rich
for my budget.  If anyone wants to order the brochure, though, the 
company's phone number (USA only) is 1-800-788-0800.

--John Hazelton
From: dino@inqmind.bison.mb.ca (Tony stewart)
Newsgroups: sci.electronics
Subject: Re: converting one-hot encoding to binary
Date: Thu, 15 Oct 92 00:14:22 CDT
Organization: The Inquiring Mind BBS  1 204 488-1607

collin@angelo.amd.com (Collin K. Ong) writes:

> I have a string of 64 bits which is one-hot encoded, which means that
> each bit represents one on/off state of one physical unit.  I want to
> convert these 64 bits into a single 6 bit representation.  The 64 bits
> are stored in a 64 bit circular shift register.  The string starts out
> cleared to all 0.  Then a string of 0111...1 is loaded into the shift
> register and is shifted around, thus on the next clock, the string
> will be 1011..1, then 11011...1, etc.  Thus there is only one bit which
> is 0 at any one time EXCEPT when the registers are cleared to all zeros.
> I want to map the all zero state to 000000, 011111 to 000001, 101111 to
> 000010, etc.
> 
> I know this can be done combinationally/with a PLA but I was wondering
> if there was a better way since the number of combinations is limited
> in that there can only be one 0 in the string except in the all zero 
> case.
> 
> Any suggestions welcome.  Thanks.
> 
> Collin Ong
> collin@brahms.amd.com
> 
> 

SOUNDS like an old fashioned CHASER CIRCUIT to me. This is normally done 
with 16 bit decoders using a binary counter to address the counter. Te 
active output is LOW and only one output is LOW at a time.  it would take 
4 decoders or better still a 16 bit decoder and a 2 bit decoder to sw
swithc the output...oops ,I just realized you want to read these device 
states not CONTROL them.. THE OPPOSITE OF A DECODER is a PRIORITY ENCODER 
using 6 bit binary
CHIP. THis will convert 1of N output active to a binary number. (Highest 
input get priority and determines output state...
 Of course now adays you could solve this problem with a 1 bit 
microprocessor, that handles serial input and converts to parallel output 
the binary number...A PAL with a counter and flipflops could be designed 
to emulate this Priority encoder all in one chip perhaps.

I know the simplest way is reverse the order of your 24 bits so that 
111110 = 000001 and 111101 = 000010 ..etc then you just need 1 shift 
register or just 1 counter that counts the number out 24 clock pulse it 
takes to see a transition from 0 to 1.  MAybe all you need is a 24 
channel MUX to read your 24 DEVICES and a counter to see which ONE of the 
24 is ON....anyways you got some ideas...have fun...

Tony Stewart
Unisys Canada, WinterPeg MB

dino@inqmind.bison.mb.ca
The Inquiring Mind BBS, Winnipeg, Manitoba  204 488-1607
From: aj@sage.cc.purdue.edu (John Dormer)
Newsgroups: sci.electronics
Subject: Looking for STorage Controller for SIMMs, plus refs
Summary: I need a little bootstrap help (no pun)
Keywords: SIMM, STC, ram, controller, memory
Date: 15 Oct 92 22:14:38 GMT
Organization: Purdue University


  Without luck, I have searched our libraries for information on implementing
a SIMM-based memory storage device. What I need now is info on storage
controllers (STCs) and pointers to suppliers of such devices, as well as any
anecdotes you can share about building SIMM-based memory devices from
scratch. These are very consumerized devices, and there is little information
on them apparently. :<

:	John Dormer
:	Purdue Daemons
:	jad@expert.cc.purdue.edu
From: irac@yang.earlham.edu
Newsgroups: sci.electronics
Subject: Re: fluoresent lighting
Date: 13 Oct 92 18:22:34 GMT
Organization: Earlham College, Richmond, Indiana

In article <1992Oct11.163610.1@research.ptt.nl>, walvdrk_r@research.ptt.nl (Kees van der Wal) writes:
> In article <718623068.4@mailbox.bison.mb>, Jason.Goga@mailbox.bison.mb.ca
> (Jason Goga) writes: 
> 
>> In chemistry class the teacher was illustrating flouresent lighting, and

> 
> 1) The high voltage between the ends of tube cause a stream of electrons 
> rushing from one end to the other.
> 
> 2) The rushing electrons collide with the gas inside (Mercury?). The electrons 
> belonging to the gas are excited to higher energy levels. As this is an 
> unstable situation the electrons "fall down" to a stable position, emitting a 
> foton. This light is not very useful as it is very blue and contains a lot of 
> UV radiation.
> 
> 3) The UV radiation hits the phosphor at the inside of the tube. I don't know
> how it is done but a similar process in the phosphor "converts" the mainly 
> invisible radiation into visible and useful light. The type of phosphor 
> determines the colour of the light emitted by the tube.
> 

The UV radiation is of the correct engery to bring some of the electrons in the
phosphor up to a higher energy level. Then then bounce back down through a
different route of energy transistions emitting differnt frequency photons.
Here is a diagram.

4    _
          4a -

3    _    3a -
          2a _
2    _       
1    -

These are not at all acurate but lets say they are the energy level of the
atoms in the phosphor. The UV is high energy, short wavelenght high frequecy
light. It excites an electron in the 1 state up to the 4 state. This electron
can them come down in a couple of different ways. 4 to 4a 4 to 3a 4 to 3 4 to
2a 4 to 2. 4 to 1 would be forbidden. But it would come down in little jumps
emmiting lower energy photons each time. These lower energy photons would have
longer wavelengths... and lower frequencies. They would be, or some of them
would be in the visible spectrum. 

This is how I understand it at least. The energy states are defined by the
possible configurations of the electrons that can be predicted with from
emirical data from Ryberg's eqautions or from theory with the SCH eqation. I
will not go into those because they make my brain hurt even though I am
supposed to know them.  

> 
> Regards, <kees>
-- 

-ira

/{E-mail for questions about it all to IRAC@yang.earlham.edu}?
/{You mail me.. I ask you questions. Eat a lollipop Mary.   }?
From: bryant@neural.Kodak.COM (Steve Bryant)
Newsgroups: sci.electronics
Subject: AT Keyboard Interface Specification.
Date: 16 Oct 92 17:43:45 GMT
Article-I.D.: kodak.1992Oct16.174345.1081
Organization: Eastman Kodak Co., Rochester, NY

Does anyone know or know where to get the hardware interface specification
of the AT keyboard? I need the technical details of how the keyboard is
communicating with the PC including the protocol.
From: george@mech.seas.upenn.edu
Newsgroups: sci.electronics
Subject: Re: why is one prong on plug wider than the other?
Date: 13 Oct 92 18:16:33 GMT
Distribution: usa
Organization: University of Pennsylvania, Mechanical Engineering

:
:
:In older metal appliances, before the 3rd grounding pin, one of the
:120 lines were attached to the case of the appliance to be used as a
:ground.  Back then there was no standard side of the 120 to be used as
:ground so either one was used.. 

but..but.. polarized plugs ( it seems ) weren't common until
the mid 70's ( remember the little explanatory tags ).  Three prong
grounded plugs were available long before that ( no? )


--
  /   george jefferson
\/ *  george@mech.seas.upenn.edu
From: pauls@trsvax.tandy.com
Newsgroups: sci.electronics
Subject: Re: Radio Shack Reverb Unit (need help
Date: 15 Oct 92 19:38:00 GMT
Nf-ID: #R:netnews.upenn.edu:92782:trsvax:288200022:000:163
Nf-From: trsvax.tandy.com!pauls    Oct 15 14:38:00 1992


 designed it, if it was the "Project Board" version with the Reticon
 SAD1024 delay line in it.

 Send me email : pauls@trsvax.tandy.com and I will try to help.
Newsgroups: sci.electronics
From: wrb@cbnews.cb.att.com (wallace.r.blackburn)
Subject: Motorola Literature Phone #?
Organization: AT&T
Distribution: usa
Date: Thu, 8 Oct 1992 12:23:52 GMT
Keywords: motorola microcontroller

Anyody know the number for Motorola's literature distribution?  I've lost
it and need to give them a call.  Thanks.


			Wally Blackburn AA8DX
			wrb@ccsitn.att.com
From: mcovingt@aisun3.ai.uga.edu (Michael Covington)
Newsgroups: sci.electronics
Subject: Re: Smith Chart
Date: 12 Oct 92 17:34:19 GMT
Distribution: usa
Organization: AI Programs, University of Georgia, Athens

In article <1992Oct12.112607.13870@doug.cae.wisc.edu> kolstad@cae.wisc.edu (Joel Kolstad) writes:
>I have a question about this Smith Chart copyright discussion...
>How is it that you can copyright what is basically the mere plot of a
>mathemetical function!? (z=(1+k)/(1-k))
...
>I realize that if you have _the_ Smith chart produced by ??? Electric, you
>can't copy it -- just like a book.  But if you regenerate the plot from the
>mathematical model?  This seems odd to me...  if so, pretty soon people
>will want to copyright things like the Mandelbrot set, etc.!

You make a very valid point, and someone more experienced with copyright
law than me would need to comment on it.

I think it entirely reasonable to assume that the copyright covers
Smith's artwork (which was very expensive to produce at the time!) and
not the function itself.  If he had wanted to restrict the _use_ of
this plotted function as a means of calculating complex impedances, he
should have gotten a patent rather than a copyright.  And he didn't.

Comments from any knowledgeable person?
-- 
:- Michael A. Covington     internet mcovingt@uga.cc.uga.edu 
:- Artificial Intelligence Programs       phone 706 542-0359
:- The University of Georgia                fax 706 542-0349
:- Athens, Georgia 30602 U.S.A.          amateur radio N4TMI
Newsgroups: sci.electronics
From: kcarver@dante.nmsu.edu (Kenneth Carver)
Subject: Tiny, low-power DPMs
Summary: Need to locate distributor for Maplin dpm
Keywords: Maplin tiny dpm
Organization: New Mexico State University, Las Cruces, NM
Date: Thu, 15 Oct 1992 22:21:41 GMT

I need to locate a source for IC-size lcd digital panel meters.  I
have been informed that Maplin, a UK company, sells these for about
$40 U.S.  If anyone knows of a U.S. distributor for Maplin, or how to
order directly, please e-mail me.

--Ken Carver   kcarver@nmsu.edu


Newsgroups: sci.electronics
From: sam@wa4phy.ampr.org (Sam Drinkard)
Subject: Re: Blacklight SOURCE wanted!
Organization: Garden City Gateway, Augusta, GA
Date: Fri, 16 Oct 1992 11:00:15 GMT

kupiec@hp800.lasalle.edu (Bob Kupiec) writes:

>Does anyone know a local or mail order source for Blacklight
>tubes? (I think that is the correct term for the light that
>looks violet and makes white items shine brightly.  If not,
>then what is?)

>I'm looking for 12" stick bulbs (like standard forescent).
>Also, what is the price range of these bulbs?  Are they
>very expensive?

>-- 
Try Spencer Gifts in the mall.  They have them for about $12.00

Sam..

-- 
     Sam Drinkard		internet: wa4phy!sam@galois.nscf.org
     WA4PHY			amprnet:  wa4phy@wa4phy.ampr.org

Newsgroups: sci.electronics
From: suda@shakti.ncst.ernet.in (Suda)
Subject: PCB Layouts in edif
Organization: National Centre for Software Technology, Bombay
Date: Sun, 11 Oct 1992 11:40:57 GMT

	I am looking for a way of transferring/preserving our PCB
files.  A standard file format like EDIF will be of help in using more
than one package. 
Is it possible to describe PCB Layouts in an EDIF file? 
If not edif, is there any ONE way of describing the entire pcboard (not
only netlist) which most of the PCB programs support?
If yes, who are the vendors supporting it? Is there any
conversion utility available to /from EDIF to PADS, CADSTAR formats?
If you have any information, please send a e-mail to
suda@shakti.ncst.ernet.in . I will post the answers later.

Sudarsana Rao.
---------------

-- 
Sudarsan.... Software Options India, Bombay
Newsgroups: sci.electronics
From: gboxman@cs.ruu.nl (Gait Boxman)
Subject: Need info on Xtor : B1010
Summary: request pinouts and/or compatible european transistor
Date: Mon, 12 Oct 1992 11:01:31 GMT
Organization: Utrecht University, Dept. of Computer Science
Keywords: info,AKAI,transistor,repair

Hi networkers,

I recently was asked to repair a broken AKAI consumer VCR ( VHS ).
Inspection showed a blown transistor, marked B1010, on the power
supply board. Since the board is quite complex, I'd rather not
track down it's layout to find out the pinouts or a replacement.
So, would one of you be so kind to tell me what the pinouts are
and maybe give me direction to a replacement transistor I can
get at the nearest electronics vendor. (If you got the ratings, I
could find one myself). 


Thanks in advance,
Gait Boxman
Utrecht University
The Netherlands
Newsgroups: sci.electronics
From: walduck@mpr.ca (Andrew Walduck)
Subject: BSR boxes 
Organization: MPR Teltech Ltd., Burnaby, B.C., Canada
Date: Tue, 13 Oct 92 23:46:43 GMT

Does anyone out there have documentation for the BSR switch boxes...?
(these are the little boxes that plug into outlets, or replace switches,
to allow you to control the device remotely...the controller transmitted
RF on the ac power lines...and the remote box received it...)

Could someone point me in the general direction of information about
these things??? I'm looking specifically for documentation about the
power line interface...the transmitter circuit, the receiver circuit,
and the protocol followed...

Thanx
Andrew Walduck

-- 
Andrew Walduck, MPR Canada, walduck@mprgate.mpr.ca
-------------------------------------------------------------------------------
(I hope someone will flatter me by using this as a .sig quote...)
 -- Reid Kneeland
Newsgroups: sci.electronics
From: Josef Moellers <mollers.pad@sni.de>
Subject: Re: How do those chaser lights move back and forth??
Date: Thu, 8 Oct 1992 06:37:19 GMT
Organization: Siemens Nixdorf Info.Sys. AG, Paderborn, Germany

In <1992Oct7.060651.1242@netcom.com> geo@netcom.com (George Pontis) writes:

>Josef Moellers <mollers.pad@sni.de> writes:

>>In <BvFDAL.As6@news.cso.uiuc.edu> rky57514@uxa.cso.uiuc.edu (Tall Cool One ) writes:

>>>Hi,

>>>	I've been wondering for a long time - How do those moving lights work?
>>>Specifically, those lights arranged linearly that seem to move from one end
>>>to the other, and then reverse direction and move toward the other end.  
>>>Kinda like the lights mounted on K.I.T.T., that car from Knight Rider..
>>>(Remember that TV series??).  Can I somehow do it with 4017 decade counters??
>>>Any ideas would be greatly appreciated.  Thanks.

>>With n lights, You'll have a cycle of 2(n-1). So, if You want x states
>>(e.g. 10), You need (x/2)+1 lights (e.g. 6).
>>Take a binary counter that counts as far as You want, e.g. 10, then
>>attach a n-to-m decoder.
>>These usually have negative output logic, so You need a couple of
>>AND-gates:

>>A 6-light setup needs
>>- 1 decade counter
>>- 1 decade decoder
>>- 4 AND gates
>>- 6 lights with appropriate drivers (e.g. leds with series resistors)

>In all fairness to the original poster of the article, we should mention
>that many implementations of the "heart beat" LED array are done with
>a single latch, controlled by firmware.

Yep, I'll sell him a MIPS based system that has just this setup. It will
cost him several K$, but what the heck B-{). If You had the opportunity
to take the cover of one of our RISC based systems (RM400), You'd see the
lights go back and forth (to allow a visual check of the machine's
"aliveness", when all other means fail).
My assumption was that he was looking for a simple solution, e.g. for
just a gadget. My discussions with him via email have confirmed this.
-- 
| Josef Moellers		| c/o Siemens Nixdorf Informationssysteme AG  |
|  USA: mollers.pad@sni-usa.com	| Abt. STO-XS 113	   | Riemekestrasse   |
| !USA: mollers.pad@sni.de	| Phone: (+49) 5251 835124 | D-4790 Paderborn |