HDTenEightyP/NetNews huggingface dataset:
From: pvr@wang.com ()
Subject: Re: Shareware/freeware PCB/schematic-capture programs FTP-able?
Organization: Wang Labs, Lowell MA, USA
Date: Fri, 11 Dec 1992 14:00:10 GMT

plumpe@oasys.dt.navy.mil (David Plumpe) writes:

>In sci.electronics, plumpe@oasys.dt.navy.mil (David Plumpe) writes:
>->In sci.electronics, dplatt@ntg.com (Dave Platt) writes:
>>>There was mention in this newsgroup, a few weeks ago, of a PCB-design
>>>and/or schematic-capture program by Protel which was available free by
>>>mail.  I believe I recall someone mentioning that it had been made
>>>available for anonymous FTP.  Is this true?  If so, where might it be
>>>found?
>>>
>>>Concerning the free or shareware "student edition" of PADS PCB - same
>>>questions - anybody got it on-line?
>>>
>->    PADS demo is on wuarchive.wustl.edu (128.252.135.4) in mirrors/msdos/cad.
>->PADSPCB.ZIP is the PCB layout/autorouter.  PADSLOG.ZIP is schematic
>->capture and PADSLIB.ZIP is the library.
>->
>    I must correct myself.  Those files WERE there in early November,
>but I can't figure out how to get to them now.  The index for mirrors/msdos
>says the files are in msdos/cad, but they don't seem to be there.
>    Anybody have any ideas??

   PADS-PCB is available from simtel20;

These files are available via anonymous FTP from WSMR-SIMTEL20.ARMY.MIL
(192.88.110.20) or mirror sites OAK.Oakland.Edu (141.210.10.117),
wuarchive.wustl.edu (128.252.135.4), ftp.uu.net (137.39.1.9),
nic.funet.fi (128.214.6.100), src.doc.ic.ac.uk (146.169.3.7) or
archie.au (139.130.4.6), by e-mail through the BITNET/EARN file
servers, or by uucp from UUNET's 1-900-GOT-SRCS.  See UUNET file
uunet!~/info/archive-help for details.

Directory PD1:<MSDOS.CAD>

PADSLIB.ZIP   B  488615  920212  PADS library for PADSPCB.ZIP and PADSLOG.ZIP
PADSLOG.ZIP   B 1081636  920212  PADS Logic schematic capture CAD program
PADSPCB.ZIP   B 1036461  920212  PADS PCB (printed circuit board) layout pgm


--
>>>>>>>>>>>> Peter Reilley ..... pvr@wiis.wang.com ..... KA1LAT <<<<<<<<<<<<<
                     Well, that about says it.
Newsgroups: sci.electronics
From: mcovingt@aisun3.ai.uga.edu (Michael Covington)
Subject: Re: Help with broken scope
Keywords: Nicolet, oscilliscope, help
Organization: AI Programs, University of Georgia, Athens
Date: Mon, 14 Dec 1992 05:38:46 GMT

If it works correctly some of the time, but occasionally acts erratic,
look for a loose connection.  You might want to disassemble it, clean
contacts, and put it back together.

Horowitz and Hill say switches and connectors are the least reliable
parts of modern electronic gear.

-- 
:-  Michael A. Covington     internet mcovingt@uga.cc.uga.edu :   Verbum caro
:-  Artificial Intelligence Programs       phone 706 542-0358 :    factum est
:-  The University of Georgia                fax 706 542-0349 :  et habitavit
:-  Athens, Georgia 30602-7415 U.S.A.     amateur radio N4TMI :   in nobis...
From: ee89tmp%ee.surrey.ac.uk (Martin)
Newsgroups: sci.electronics
Subject: SONY CONTROL L
Date: 14 Dec 92 00:59:26 GMT
Organization: University of Surrey, Guildford, England
X-Newsreader: TIN [version 1.1 PL6]


Forgive me, I know this is a FAQ, but I need to get details of the
Sony Control L system very quickly.

I have tried finding them myself from archive sites, and I can't even
find the FAQ for this newsgroup anywhere, so this is a last resort.

Can someone please post them, mail them to me or point me to an ftp site.
PLEASE HELP ME!

Martin

--
Martin Pitwood - martin@specialix.co.uk or ee89tmp@ee.surrey.ac.uk
From: albrecht@csd4.csd.uwm.edu (Chad Edward Albrecht)
Newsgroups: sci.electronics
Subject: Elec-Mag Rad
Date: 16 Dec 1992 02:38:41 GMT
Organization: University of Wisconsin - Milwaukee
NNTP-Posting-Host: 129.89.7.4


HI!

I am currently working on a VR project that requires a system of transmitters
and receivers.  I have a few questions that I hope will be easily answered:

1)	What is the most accurate and sfe waveform I can use.  In other
	words I need to measure distances within .001 of an inch from about
	20 feet.  It needs to be a fairly long wavelength, so as to not
	give me cancer!

2)	What kind of info does the reciever output (digital or analog?)

3)	How easy is it to triangulate with this setup?

I will have (8) transmitters and as many reicevers as I need.  What I was
thinking is to have each transmitter send a slightly different frequency
and the same receiver distinghush between them.  This would make things
a lot easier.  Thanks in advance!

--



-----------------------------------------   "The chess board is the world,
|	albrecht@csd4.csd.uwm.edu	|    the pieces are the phenomena 
|      albrecht@convex.csd.uwm.edu      |    of the universe, the rules of
|        acct146@carroll1.cc.edu        |    the game are what we call the
|       COMPUTING SERVICES DIVISION     |    laws of nature."
|	   UNIX  CONSULTING             |
|	   MICRO CONSULTING	        |           --T.H. Huxley
|     EMS 229-5370 Bolton 229-5317      |
-----------------------------------------
From: jeffj@cbnewsm.cb.att.com (jeffrey.n.jones)
Newsgroups: sci.electronics
Subject: Help on the XR 2206 please!
Date: 18 Dec 92 19:04:40 GMT
Distribution: usa
Organization: AT&T

A friend of mine is rebuilding a piece of test equipment and he
is looking for information on the XR 2206 chip. He would like
the schematic and any other information that he could get. Thanks
for any help here!

Jeff
-- 
 Jeff Jones  AB6MB         |      
 jeffj@seeker.mystic.com   |     
 Infolinc BBS 415-778-5929 |    
Newsgroups: sci.electronics
From: more_da@pts4.pts.mot.com (Dan Morera)
Subject: Hot Tub Controller
Reply-To: more_da@pts4.pts.mot.com
Organization: Paging and Wireless Data Group
Date: Thu, 17 Dec 1992 16:56:33 GMT


Greetings and Happy Holidays Netters,

I am developing a system to remotely control a hot tub, and I have not
previously worked with the large AC voltages needed to do so.

The hot tub is powered by both phases of the 120V power entering the house.  The switch
next to the tub does nothing more than connect / disconnect both of the powers from
continuing to the blower / heater / pump of the hot tub.  What I envision doing is
putting two solid state relays in series with the switches, and control the relays
with some simple 5V logic.

The lines are rated at 60 Amps each, so I have 75 Amp relays with sufficient heat
sinking capabilities.  The entire circuit will be placed in an environmentally sound
box.  Also, the wires connecting the relays to the switch are rated at 60 Amps.  The
logic controlling the relays have 20 mA sink current specifications.

What I want to know is if I left anything out.  I want this to be safe, but I don't
want to pay a contractor to do the work for me (which I may anyway).

Any comments or opinions would be appreciated.

---
*********************************************************************
* "Could be worse -- could be raining."  * Daniel Morera            *
*********************************************************************
* "No walruses, please"                  * more_da@pts4.pts.mot.com *
*********************************************************************
From: garland@ohstpy.mps.ohio-state.edu
Newsgroups: sci.electronics
Subject: WANTED: Info on printed circuit board layout software
Date: 19 Dec 92 19:01:33 EST
Organization: The Ohio State University, Department of Physics

I'd like to collect some opinions on printed circuit board layout software,
with or without autorouting, to run on a PC. I've tried a shareware
program called PCRoute, but it doesn't have enough flexibility. I don't need
anything fancy (i.e., a la Autocad), and don't want to wade through a five
hundred page manual and spend six weeks learning how to use it. Basically, all
I need is capability for double sided boards, preferably with a silk-screening
overlay.  Autorouting would be nice but not essential.  Thanks.

Jim Garland W8ZR
From: dcovell@hfglobe.intel.com (David Covell)
Newsgroups: sci.electronics
Subject: Basic bench equipment query
Date: 15 Dec 92 17:04:22 GMT
Organization: Intel Corporation


I'm preparing to outfit myself with a basic bench setup, ie scope, function
generator, power supply, DMM, and transistor tester (lots of in-circuit
go/no go testing). As always when I begin to shop for things I start with
low expectations... basic, inexpensive, etc. But, as I read descriptions
of the functions and specs of various options I become convinced that I
just can't live without the extra features available only on the higher-
priced items, like cursors and auto-setup on the scope, touch-hold and min/max
on the DMM, etc. This is a pattern I've developed over the years when contemplating purchases of techniacl items, and I frequently realize I didn't need the
extra features after all, or they don't work the way i expected. Of course,
by then it's too late...
In an attempt to avoid doing that this time I'd appreciate some feedback
from this group on what's really appropriate for the average home hobbyist.
My primary need is for troubleshooting and tweaking audio equipment, both
tube and transistor. I occasionally need to work with digital circuits but
rarely above 20Mhz.

The scope is the biggest decision and the one that could save me the most
money. My options range from a basic 20Mhz Elenco at $400 to a Tektronics
TAS series 60Mhz with auto-setup, cursors, known quality, etc at $1550.
Both Tek and Fluke claim you should go for a bandwaidth of 5X the fastest
signal you plan to read; just how true is that? I'm sure that if you need
to measure critical rise times, capture glitches, etc that's probably true,
but my needs are less strict. What's a more reasonable factor than 5X for
applications where accuracy is less critical? Can I use a 20Mhz scope
on waveforms that approach 20Mhz and get reasonable accuracy and visibilty?
I definitely need dual trace, but how much do I need dual time base? Delay?
Are Elenco, Hitachi and B+K Precision scopes in the <$1000 range reliable?
If not, I'd definitely go with thr Tektronics.
Tek has eliminated several lower-end scopes and the choices now are
limited to the 20Mhz single-trace 2205 at $700 or the 60Mhz TAS455 for $1550.
That's a hard choice, and I'm surprised there's no middle ground.
DMM's another hard choice; The Fluke 79 has most of the features I want
(in fact maybe more than I need). I'd prefer something cheaper than it ($185)
but it has a high range for capacitance (to 9999uF) and the Touch-hold    
feature, which will be handy in freeing me from trying to look at the
meter while probing a 480V tube plate.
As always, I'd prefer to find some good used deals, but the only things I see
are old and feature-poor.
Any advice? Pointers?
From: sr3745@dean1.usma.edu (Roeber Rodney MAJ)
Newsgroups: sci.electronics
Subject: Re: WANTED: datasheet for Motorola MC146818 Real Time Clock chip
Date: 14 Dec 92 04:18:29 GMT
Reply-To: sr3745@dean1.UUCP (MAJ Rodney B. Roeber)
Organization: US Military Academy, West Point, NY

In article <342.filbo@deeptht.santa-cruz.ca.us> belal@sco.COM (Bela Lubkin) writes:
>Can anyone email me, or point me to a datasheet for the Motorola
>MC146818 Real Time Clock chip used in IBM AT type computers?
>
>What I'm most looking for is a table of the possible values for bits 3:0
>of "status register A" -- the "rate selection bits".  The documentation
>I have says that the IBM BIOS initializes these bits to 0110, thus
>selecting a 1024 Hz square wave.  Unfortunately, it doesn't bother to
>document what the other 15 combinations mean.  If you have only a
>printed datasheet, let me know if you're willing to type in that table.
>
>I suspect there's a lookup table in the chip, and that there might be
>different versions of the chip with different lookup tables.  Any
>further information or warnings about that would be appreciated.
>
>If I receive an online datasheet I will make it available to others;
>send me a request now (via email).  I do not intend to post it -- the
>concept of a "summary" of a datasheet doesn't seem to make much sense...
>
>Thanks in advance!
>
>Bela Lubkin  * *  //  filbo@deeptht.santa-cruz.ca.us    ZURC ATNAS morf EVIL!
>     @     * *   //  belal@sco.com   uunet!sco!belal  uunet!sco!deeptht!filbo
>R Pentomino  * \X/  Filbo @ Pyrzqxgl +1 408-476-4633 and XBBS +1 408-476-4945

Not quite a data sheet but here's the table:

                 4.194304 or 1.048576 MHz
                      time base
                Periodic Int   SQW Output
RS3 RS2 RS1 RS0    Rate           Freq
 0   0   0   0    None            None
 0   0   0   1  30.512 us      32.768 kHz
 0   0   1   0  61.035 us      16.384 kHz
 0   0   1   1  122.070 us     8.192 kHz
 0   1   0   0  244.141 us     4.096 kHz
 0   1   0   1  488.281 us     2.048 kHz
 0   1   1   0  976.562 us     1.024 kHz
 0   1   1   1  1.953125 ms    512 Hz
 1   0   0   0  3.90625 ms     256 Hz
 1   0   0   1  7.8125 ms      128 Hz
 1   0   1   0  15.625 ms      64 Hz
 1   0   1   1  31.25 ms       32 Hz
 1   1   0   0  62.5 ms        16 Hz
 1   1   0   1  125 ms         8 Hz
 1   1   1   0  250 ms         4 Hz
 1   1   1   1  500 ms         2 Hz
Organization: Queen's University at Kingston
Date: Thu, 17 Dec 1992 23:29:31 EST
From: <LEEK@QUCDN.QueensU.CA>
Newsgroups: sci.electronics
Subject: Re: Handling CMOS
 <1992Dec11.211003.22990@pts1.pts.mot.com>
 <1992Dec14.120707.13760@eng.cam.ac.uk>

In article <1992Dec14.120707.13760@eng.cam.ac.uk>, cmh@eng.cam.ac.uk (C.M.
Hicks) says:

[stuff about static prevention deleted]

>sockets :-? BTW, conductive foam is much more usable than foil.
                  ^^^^^^^^^^^^^^^

I hope that's not the same stuff as the graphite foam stuff...
(You know that black spongy stuff.)   I  remember see the picture of IC
pins being corroded away in those foams after a few years (close to 10)
in QST.

I don't know what caused that.  It might due to chemical action.  A
little bit of moisture, a bit of salt spray or something and 2 different
metal -> instant chemical cell.  I would say definitely keep the chips
away from moisture.

> Christopher Hicks    |    If it doesn't fit...
> cmh@uk.ac.cam.eng    |                        ...you need a bigger hammer.
                                                   ^^^^^^^^^^^^^^^^^^^^^^
K. C. Lee                                            :)
Elec. Eng. Grad. Student  (Mass of electron is 0.5Kg +/- 1Kg )
Newsgroups: sci.electronics,rec.audio
From: greg@cs.washington.edu (Greg Barnes)
Subject: Fuses in Europe and USA
Followup-To:  sci.electronics
Organization: Judy Vickery Fan Club, Saarbr\"ucken Chapter
Date: Thu, 17 Dec 92 13:06:28 GMT

[This is posted for a friend in Germany.  Please do not respond to me,
but to shiva@mpi-sb.mpg.de.   ---Greg]
-----------------------------------------------
I'm in Germany and using my 110V stereo on the 220V supply with a step
down transformer. A fuse rated 3.15A/125V has blown in my stereo. I
can't find another with a 125V rating in the local shops. I can get a
3.15A/250V fuse, though.

I was told the following: The voltage drop across a working fuse is anyway
negligible, and the 250V rating refers to the maximum voltage that the
fuse will block once it has burned. So the important thing is the
ampereage that the fuse permits. So it would be okay to replace the
part with a 3.15A/250V fuse.

Can anyone tell me whether the above explanation is reasonable? Any
other advice would be appreciated also.

Please e-mail replies to shiva@mpi-sb.mpg.de.
Many thanks.
Shiv
From: gcouger@olesun.okstate.edu (Gordon Couger)
Newsgroups: sci.electronics
Subject: Re: Transmission line question
Date: 16 Dec 92 00:56:04 GMT
Article-I.D.: osuunx.1992Dec16.005604.24805
Organization: Oklahoma State University, Stillwater

In article <1992Dec15.202004.15878@ucsu.Colorado.EDU> barr@tramp.Colorado.EDU (BARR DOUG) writes:
>Some specs I have call for ethernet coax to be grounded in one location
>and one location only! I am wondering why this is. Antenna effects,
>current loops or something else. Does anyone know why this is the case?


Gordon Couger
AB5Dg   Agriculture Engineering Oklahoma State University
gcouger@olesun.agen.okstate.edu 405-744-6514 day 744-2794 evenings   
Newsgroups: sci.electronics
From: byron@cc.gatech.edu (Byron A Jeff)
Subject: Re: Best nicads??
Reply-To: byron@cc.gatech.edu (Byron A Jeff)
Organization: Georgia Institute of Technology
Date: Thu, 17 Dec 1992 14:26:14 GMT

In article <13662@optilink.COM> walsh@optilink.COM (Mark Walsh) writes:
>From article <1992Dec15.161824.7507@cc.gatech.edu>, by byron@cc.gatech.edu (Byron A Jeff):
>
>> I'm planning on using a battery pack with the D size batteries for a computer
>> I'm building.
>
>These babies are expensive.  For the D's, you are talking
>eight bucks each.  Why not just use a camcorder battery?
>RS has a cellular phone battery that is 12V, 2300mAH for
>forty bucks.  I bet that this would work well for a
>computer.  Does anybody know about the laptop PC batteries?

What you say is true. A couple of folks (Yo Jason and Dean!) have clued me
into a couple of possibilities.

1. Maxim Corp. makes an extremely cool voltage regulator series (the MAX722 and
   MAX723) That does the following: It'll regulate either a higher voltage
   (up to 9 or so) or a lower voltage (check this: Down to 1V!) input to
   5V at 200ma. So I can use only 2 batteries and this regulator to get 5V.
   It performs internal switching and charge pumping at 85% efficency. In 
   addition they also have a lower voltage mode for doing battery backed
   RAM or 3.3V chips.

2. Apparently we computer follks are looking in the wrong place. The real hotbed
   of NiCad activity is in hobby car racing. These folks have to deal with
   everything we've talked about and more: fast charging, getting the most
   power out a cell, not blowing up cells ;-)! So one side effect of this is
   the use of high current, fast charging Nicads. Here's two sources:

------------------- Begin Included Text ---------------------
Tower Hobbies 1-800-637-4989
or Sheldon's Hobbies: 1-800-822-1688
Ask about pricing on single D-Cell nicads, not matched or pushed, for
use in truck-pulling (they will know what this means). 
--------------------------------------------------------------

The best thing about Nicads Mark are that they are rechargeable. So a
high initial investment of $40 or $50 is amortized over years or use.
Also the high capacity D cells have twice the capaicty of the camcorder
battery. That means twice as long between recharges.

One last aside: The car hobbyists say that the memory effect is real. This
means that continued (<- important) partial charging and discharging of
NiCads will reduce their effectiveness over time. This means that it's
better to run the battery all the way down then recharge.

Later,

BAJ
---
Another random extraction from the mental bit stream of...
Byron A. Jeff - PhD student operating in parallel!
Georgia Tech, Atlanta GA 30332   Internet: byron@cc.gatech.edu
From: vporguen@unlinfo.unl.edu (victor porguen)
Newsgroups: sci.electronics
Subject: Re: Caller ID block?
Date: 21 Dec 1992 03:41:15 GMT
Organization: University of Nebraska--Lincoln	
Distribution: world
NNTP-Posting-Host: unlinfo.unl.edu

The problem with Caller ID is not so much that it reveals who is 
calling whom, but rather that it makes the calling party subject 
to being itself called, just by reason of calling someone who HAS 
published his number and/or solicited calls.  

If you call an airline to get a flight schedule, they now may call 
you back.  At any time. In the middle of the night. For any purpose. 
Sales, solicitation, you name it. Or give your number to anyone they 
please.  For any purpose. 

Caller ID is a weapon, and it's aimed at YOU!

The fact that Caller ID may have some value for some purpose for 
some people is not sufficient justification to make ALL people
subject to it, at ALL times, for ALL uses. 
                                           
Caller ID has one purpose: to give added revenue to the Telephone 
companies. At the expense of citizen's privacy. It has no other 
reason for being.


Newsgroups: sci.electronics
From: rzuw039@winx03.informatik.uni-wuerzburg.dbp.de (Juergen Weinelt)
Subject: Re: INTEL 8052 w/BASIC - is the code public domain?
Organization: University of Wuerzburg, Germany
Date: Thu, 17 Dec 1992 07:41:58 GMT

From article <1992Dec15.175451.19971@hou.amoco.com>, by zklf0b@gs144.hou.amoco.com (Fergason):
> In article <533@bit.UUCP> thomas@bit.UUCP (Thomas Walter) writes:
>>
>>Did INTEL place the BASIC rom code for the 8052 (8031, etc.) in
>>PUBLIC DOMAIN?
> 
> according to the recent Computer Craft, it is, and the src is
> available on an Intel BBS.

If it's really PD, could somebody please upload the code (source
and executable, if possible) to some FTP site? Accessing an INTEL
BBS from outside the US can be quite expensive...

Thanks.

-- 
-- Juergen Weinelt, Germany
 o  _        1) jow@sun.rz.uni-wuerzburg.de (preferred)
 | (_) \/\/  2) jow@hcast.adsp.sub.org
 '           3) jow@hcast.franken.de
Newsgroups: sci.electronics
From: markz@ssc.com (Mark Zenier)
Subject: Re: Is there a FAQ file for sci.electronics?
Organization: SSC, Inc.,  Seattle, WA
Distribution: usa
Date: Sun, 13 Dec 1992 20:05:15 GMT
X-Newsreader: TIN [version 1.1 PL6]

Scott Jeffrey B (jbs4930@usl.edu) wrote:
: Nope.  My original question was, "Is there a FAQ *FILE*"

It's so big it's published as a book:  
"The Art of Electronics, 2nd Ed."  by Horowitz and Hill.    ;-)

Seriously, there aren't enough stupid questions that are
repeated enough times to be irritating, with the 
exception of 'I don't have a clue about electronics, How can
I repair this piece of mass produced junk by myself?'.

Mark Zenier  markz@ssc.wa.com
From: c2xrhj@kocrsv01.delcoelect.com (Ron Jaeger)
Newsgroups: sci.electronics
Subject: Re: Electronics surplus places in Indianapolis
Date: 18 Dec 92 20:43:25 GMT
Reply-To: swlodin@kocrsv01
Distribution: usa
Organization: Delco Electronics Corp.
Originator: c2xrhj@koptsw13


	Goldsmith Surplus has a lot of electronic junk.
	2107 N. Adams
	545-4747  or  257-3508
	(Call or you'll never find this place.)
Newsgroups: sci.electronics
From: tep@uwasa.fi (Timo Pitkaranta)
Subject: Re: Sony control L
Organization: University of Vaasa, Finland
X-Newsreader: TIN [version 1.1 PL7]
Date: Wed, 16 Dec 1992 13:44:51 GMT

Ed (ee89jje%ee.surrey.ac.uk) wrote:
: 
: Does anyone know where I can find details of Sony control L?

The only information I have got is here: A couple of years ago Sony
used round 5-pin connector for the same purpose as now popular 2.5 mm 
minijack, which is nowadays in Sony camcorders. That info I got from
Sony Finland who promised to send me a adapter cable to convert from 5-pin
to 2.5 mm minijack! (I have not received one yet - but hope soon!) 

If anubody gets info and specs I am interested too !

--regards Timo,  tp@vitech.fi (Vaasa Institute of Technology) 
Xref: sparky sci.electronics:20964 sci.energy:6195 rec.autos.tech:16810