HDTenEightyP/NetNews huggingface dataset:
From: dougm@pnet51.orb.mn.org (Doug Mcintyre)
Newsgroups: sci.electronics
Subject: Looking for 0.08" connector..
Date: 27 Sep 92 15:45:02 GMT
Organization: People-Net [pnet51], Minneapolis, MN.

Anybody have a source for tiny connectors? I need something like a female
3-pin connector on 0.08" centers. (Oh why or why couldn't they have used
something standard like 0.1" which is the standard and the smallest I could
find?).

I've tried some pin sockets, but seeing as they are about 0.075" in diameter,
its mighty tight in there without shorting to the next pin. 

This is for a Toshiba XM-3301B CD-ROM drive's audio port on the back of the
drive (I assume thats what it is, since its labled GLR, and its a logical
place for it..).

I'd just need one connector, or a cable if this is a standard request thing (I
don't have access to any cd-rom newsgroups..).

INET: dougm@pnet51.orb.mn.org                                GENIE: D.MCINTYRE1
From: cyberman@toz.buffalo.ny.us (Cyberman)
Newsgroups: sci.electronics
Subject: Re: Can despiking caps be
Date: 5 Oct 92 00:49:43 GMT
X-Maildoor: WaflineMail 1.00r


   Jeremy Thomas Mcdonald was espousing about 'Can despiking caps be con',
   on [10-03-92  07:23] to All!
 JTM> Do despiking caps need to go directly between the VCC and GND inputs
 JTM> of a given IC, or could they go between VCC of the IC and some central
 JTM> ground location, or even another IC's ground, for that matter?

    The answer is THEY must go between VCC and GROUND on the SAME
    chip.  The reason for a despiking cap is the momentary
    current rush caused by switching in DRAMs and some other
    chips.  The cap supplies the current needing for these chips
    and prevents them from degrading the powersupply.  By
    placeing them not Immediatly to the chips ground you are
    totally defeating thier purpose.

        Stephen Cyberman@Toz.Buffalo.NY.US
        Scripted at Sun  10-04-1992  16:29:06

... An offense in time saves nine.
--- Blue Wave/QWK v2.10
Organization: The American University - University Computing Center
Date: Wed, 30 Sep 1992 14:18:13 EDT
From: <ZHAO@auvm.american.edu>
Newsgroups: sci.electronics
Subject: How to open Interplex electric toothbrush ?

Does anyone know how to open InterPlex electric toothbrush ? The one
I used for one and half years quit working. There is no screw at all.
    Thanks in advance.
Newsgroups: sci.electronics
From: sehari@iastate.edu (Babak Sehari)
Subject: Re: a pspice question
Originator: sehari@vincent1.iastate.edu
Organization: Iowa State University of Science and Technology, Ames, Iowa.
Date: Sat, 26 Sep 1992 05:38:30 GMT

In <it1.717128237@Isis.MsState.Edu> it1@ra.msstate.edu (Tim Tsai) writes:

>  I'm trying to do analysis on a simple RLC circuit using the student
>evaluation version of Pspice.  The input is a sinuisoidal wave that
>varies from 1K to 100K hertz.  Can somebody tell me how I can vary both
>the frequency and time using pspice?  I've looked through various
>manuals and none of them have been any help.  Basically I want to do a
>transient analysis with a frequency varying input (probably very badly
>phrased...)..  Any help is greatly appreciated.

>  PS:  yes this is homework (for a lab).

It really depends how do you want to vary the frequency from 1K to 100KHz.
If you want steady state response of several frequencies in this range,
something like Budy Plot, you should look up the .AC statement on your manual.
Otherwise you have to reconstruct your input waveform point by point. It
makes a difference how fast your frequency changes from 1KHz to 100KHz.
Also, it is important how does it change, linearly or otherwise.

To construct the input wave, you probably need a FM modulator as the input
stage of your circuit in pspice.

                       With highest regards,
                            Babak   Sehari.

Newsgroups: sci.electronics
From: dhina@dxcern.cern.ch (Mourad Dhina)
Subject: 25 ohm coax cable
Summary: looking for 25 ohms coax cable
Keywords: coax cable
Organization: CERN European Lab for Particle Physics
Date: Mon, 5 Oct 1992 14:25:05 GMT

Hello,
i am trying to realize a circuit i found in an electronics magazine.
one of the components it uses is a semi-rigid coax cable of
25 ohms impedance. this is the first time i hear of this (i only
knew 50, 75 and 93 ohms cables, which are standard). anybody
knows where to find this?
Mourad
Newsgroups: sci.electronics
From: cwagner@ee.ualberta.ca (Chad Wagner)
Subject: Spice Models
Summary: Spice Models
Organization: University Of Alberta, Edmonton Canada
Date: Sat, 3 Oct 1992 00:37:47 GMT


I am looking for models of several devices for Spice.

I am running Spice3c1 but have access to Spice3e2.

What I need is:

	Op-Amps 324,741
	Comparators 339,311
	Transistors 2N4401,2N3904,MPQ2222,2N4403,2N3906,MPQ2907,MPF102
	Diodes 1N914,1N4148,1N4005, 10V and 6V Zener
	Timers 555,556

Any ones help would be greatly appreciated.
Thanks in advance!

Chad G. Wagner
EE Student
University of Alberta, Canada
cwagner@bode.ee.ualberta.ca
From: dcb0@gte.com (Daniel Bazinet)
Newsgroups: sci.electronics
Subject: Address / Publisher of Embedded Systems Magazine ?
Keywords: Embedded microprocessor
Date: 5 Oct 92 22:06:43 GMT
Distribution: na
Organization: GTE Laboratories Incorporated, Waltham MA


	Could some kind soul give me the address / phone number
	for the publisher of Embedded Systems Magazine ?

				Thanks,
				   Dan
				dcb0@bunny.gte.com
From: tomb@hplsla.hp.com (Tom Bruhns)
Newsgroups: sci.electronics
Subject: Re: Ultra-stable FM transmitter?
Date: 23 Sep 92 16:34:40 GMT
Article-I.D.: hplsla.5170224
Organization: HP Lake Stevens, WA

aslt@acad2.alaska.edu writes:

>What is important is broadcast frequency stability over the long term 
>(as in months if not years) with varying temperatures, humidity, 
>supply voltages, phase'o'th'moon, etc.  At first guess, this means 
>crystal-based design to me, but maybe there are other ways...

If you really want broadcast frequency stability, a crystal is the
minimum you should consider for frequency control.  In fact, true
broadcast stability would require a _good_ crystal, not a cheap
grunt one, but you probably don't really need it _that_ stable.

Interestingly, I was just thumbing through an old GE transistor manual,
and saw a circuit for a crystal-controlled FM transmitter--using a
tunnel diode!  But just try to find one ;-)
From: Jason.Goga@mailbox.bison.mb.ca (Jason Goga)
Newsgroups: sci.electronics
Subject: 8259 PIC --> 8051
Date: 30 Sep 92  23:10:06 CST

 JAG> Subject: 8259 PIC --> 8051
 JAG> Organization: Senior, Physics, Carnegie Mellon, Pittsburgh, PA
 JAG> Message-ID: <Qelq_Ai00WBKM61nAd@andrew.cmu.edu>
 JAG> Date: 28 Sep 92 11:52:44 GMT

 JAG> Hey now,

 JAG> Has any one ever connected up an 8259 Programmable Interrupt Controller
 JAG> to an 8051?  I happened to stuble across the 8259 and it seems to do
 JAG> what I need (that is - monitor 8 sources).  Is there any other PIC out
 JAG> there that might be simpler to interface? Etc. Etc.

I'm sorry, I rather new to this echo and hence am not too familiar with what you are asking (ie if this is in clarification to a previous question). However if you are looking for a nifty little chip to take care of interrupts, you may want to examine the Z80-PIO, it's a little strange but does have the capability to monitor several sources for certain conditions and generate interrupts accordingly. That is if you can interface it. I'm a Motorola person myself, so I don't really know. :-)

 JAG> Thanks a lot in advance.
Yer welcome, hope it helped.

-Jason


 * Origin: Cerebral Afflatus - 24Hours / day (1:348/207)
From: henry@zoo.toronto.edu (Henry Spencer)
Newsgroups: sci.electronics
Subject: Re: analogue circuit simu
Date: 26 Sep 92 23:38:59 GMT
Organization: U of Toronto Zoology

In article <1992Sep22.212433.10601@u.washington.edu> whit@milton.u.washington.edu (John Whitmore) writes:
>	The main C advantage over FORTRAN is that C's lexical
>analysis is easily mechanized, so that C compilers can be
>made easily portable.

A curious statement, since there are FORTRAN compilers that are every bit
as portable as C compilers.  (One good example is f2c, which translates
FORTRAN 77 to C.)  Nor is FORTRAN lexical analysis particularly difficult
to mechanize, although it certainly has a few boobytraps; it *certainly*
isn't machine-specific in any way.

C has no single massive advantage over FORTRAN; they are definitely from
the same family.  However, there are a lot of little conveniences in C
(compared to FORTRAN) that add up to considerably easier programming,
especially for non-numerical applications.  And C does retain one major
advantage of FORTRAN over many languages claimed to be "better":  very
efficient implementations.
-- 
There is nothing wrong with making      | Henry Spencer @ U of Toronto Zoology
mistakes, but... make *new* ones. -D.Sim|  henry@zoo.toronto.edu  utzoo!henry
Newsgroups: sci.electronics
From: cchang@cs.tamu.edu (Charles Chang)
Subject: HELP!  service info wanted
Organization: Computer Science Dept., Texas A&M University
Date: Mon, 28 Sep 1992 20:41:29 GMT

Does any one have the service info on Princton's "Ultrasync" monitor?
Is the company still around?  I called the company phone number given
on the back of the monitor, but no one answered the phone.
I tried to find the service info on the SAM's photofacts and
computerfacts, but the company's name was not even listed.
If you know anything aboutn the company or the service info on its
products, please help me.
From: Jason.Goga@mailbox.bison.mb.ca (Jason Goga)
Newsgroups: sci.electronics
Subject: 8-bit Addressable Asynch Receiver/Transmitter? (Like MC14469)
Date: 30 Sep 92  23:15:52 CST

 KL> Subject: 8-bit Addressable Asynch Receiver/Transmitter? (Like MC14469)
 KL> Organization: Purdue University Engineering Computer Network
 KL> Message-ID: <laird.717688247@stable.ecn.purdue.edu>
 KL> Date: 28 Sep 92 13:50:47 GMT

Hello Kyler!

 KL> I received a pointer to the Motorola MC14469 Addressable Asynchronous
 KL> Receiver/Transmitter in response to a request for info on simple MCU
 KL> network interface chips.  I want something to make residential/
 KL> industrial/automotive control networks "easy" to make.

You know I once wanted to build such a beast. However 'twas going to be with 6803's. Now I realize that such is not a suitable answer to the networking problem, unless 7k/second is okay with you. :-) You could of course rig up a divide by X counter and boost the baud rate of the built in serial port and get a decent speed, however every new message would interrupt the CPU, and then there's bus arbitration and such to contend with.

 KL> The MC14469 is _almost_ ideal - the only problem that I have with it
 KL> is that while it can send back 16 bits of info, it is only able to
 KL> receive 7 bits of data.  I need at least 8 bits.

Hmm, I don't have a listing for that chip. So I'm sortof in the dark as regards it's shortcomings.

 KL> I would appreciate any info on an addressable device that is able to
 KL> receive and transmit 8-bit data.  Simplicity is key.

Simplicity huh?

Well you could take a 6303 (Hitachi's 6803, with a twist), and with some bang-up programming and a touch of analog magic make a two-wire network (gnd + TXRX). Or if you don't mind having a dedicated master, you could skip the electronic magic, and nifty programming and just parrallel the bus thusly:

Master          Slave 1         Slave 2         Slave n
TX -------------+---------------+---------------+----------->
                |               |               |
RX -------------|---+-----------|--+------------|--+--------<
                |   |           |  |            |  |
                RX  TX          RX TX           RX TX

Of course the master's RX line would have to be rigged as follows:

           /----+-----+
RX -------| AND |     \-------< tx from last chip
           \----+---+
                    |                                
                    TX

this would stop you from frying your chips :-)

However most people for networks liek to stay away from standard serial chips. You didn't specify though what speed you'de want. The 6303 (6801 & 6803 too) are well suited to mini-networks because they have provisions for message detection and such.

 KL> Also, are there versions of the M68HC705 that are easy to use for such
 KL> communication?

Bit banger maybe? It's simple from a hardware standpoint.

 KL> Thanks!
Yer welcome, hope it helped.

-Jason

 * Origin: Cerebral Afflatus - 24Hours / day (1:348/207)
Newsgroups: sci.electronics
From: medin@catbyte.b30.ingr.com (Dave Medin)
Subject: Re: multimeters
Reply-To: medin@catbyte.b30.ingr.com
Organization: Intergraph Corporation, Huntsville AL
Distribution: na
Date: Fri, 25 Sep 1992 20:03:40 GMT

In article <1992Sep25.130218.15070@unlinfo.unl.edu>, mpaul@unlinfo.unl.edu (marxhausen paul) writes:
|> Our EE Shop here at the university has plugged along with Fluke multimeters
|> for years.  I can't compare them to lots of other brands that I haven't
|> used, but they have been solid, reliable, and resistant to repeated and
|> continuous abuse.  I've noticed that the newest lineup of Flukes include
|> 1) some economical low-end models, and  2) the new Fluke 79,  which is
|> like my old 77 except it can also read frequency and capacitance and
|> low resistance values and is just generally improved all the way around.

I'd like to put in a plug for Fluke products, too, which have been
the most reliable meters I've owned. The 77 I still have has taken
plunges off roofs, drops on floors, etc., and survived fine. On the
other hand, all the Beckman products I've ever owned or used had
terrible reliability--mostly due to the display subsystem and the
crummy LCD clamp and zebra strip they use. For backup meters, I've
made a habit of buying broke Beckmans at hamfests, etc, and fixing
them (I'm getting good at it)...

I'd like to try the Tek someone else mentioned...

-- 
 --------------------------------------------------------------------
       Dave Medin			Phone:	(205) 730-3169 (w)
    Intergraph Corp.				(205) 837-1174 (h)
       M/S GD3004
  Huntsville, AL 35894 		Internet: medin@catbyte.b30.ingr.com
				UUCP:  ...uunet!ingr!b30!catbyte!medin

   ******* Everywhere You Look (at least around my office) *******

 * The opinions expressed here are mine (or those of my machine)
From: Jason.Goga@mailbox.bison.mb.ca (Jason Goga)
Newsgroups: sci.electronics
Subject: MC68705P3S,need a programmer
Date: 01 Oct 92  17:07:53 CST

 > Subject: MC68705P3S,need a programmer
 > Organization: Digital Equipment Corporation
 > Message-ID: <1992Sep29.185315.27473@ryn.mro4.dec.com>
 > Date: 29 SEP 92 14:49:58


 > What is the cheapest programmer I can buy that will program a
 > MC68705P3S??

If it's the same as the plain P3 I have the schematic for the programmer, from Motorola. If you wanna build a simple one (copys from an EPROM to the 705)

 >                                       thanks,
 >                                          Ken
-Jason

---
 * Origin: C.A. - FrontDoor (1:348/207)
Newsgroups: sci.electronics
From: tchannon@black.demon.co.uk (Tim Channon)
ReplyTo: tchannon@black.demon.co.uk
Subject: Re: Information wanted about Pal/Gal/? PC-type development s
Distribution: world
X-Mailer: cppnews $Revision: 1.18 $
Organization: null
Date: Thu, 1 Oct 1992 23:50:52 +0000

> : [Wants info on Gals]
> : 
> 
> I have used CUPL from logical devices. This costs $100 for what they call a
> "starter kit" which is fully useable, but doesn't have many devices. The full
> scale model is about $500
> 
> I have also used PALASM from AMD. They gave us a version free. Its very good,
> and very easy to use, with many parts supported, and a moderately good wave
> editor/ simulator. I don't believe this is very expensive ($150 maybe) since
> they gave us a copy just for buying some GALS.
> 
> We tried SNAP from Signetics. This is next to useless since it only supports
> their esoteric devices.
> 

National Semi supply a demon version of Opal with the eqn to jed and jed to 
gal programs, the rest is just a demo.
The real thing is $100. This adds the opal language, an optimiser and 
simulator.
Handles small PAL and GAL.
Ask them for their list of approved programmers -- makes interesting reading.

  TC. 
    E-mail: tchannon@black.demon.co.uk or tchannon@cix.compulink.co.uk
Newsgroups: sci.electronics
Subject: Re : Looking for info on Dove X^2 dissol
From: Mike_Diack@kcbbs.gen.nz (Mike Diack)
Date: 26 Sep 92 19:56:40 GMT
Organization: Kappa Crucis Unix BBS, Auckland, New Zealand

Mr Williams : if it is extremely cheap ... BUY IT !!!!
These units have two modes of operation , manual and serial.
Manual :
You plug a standard SAV Kodak remote in the 6 pin din socket on the 
back of the unit, set the selector for 2 or 3 projectors, then pickle 
the remote as per usual.
Forward gives you a "CUT" from one projector to the next
Reverse gives you a 2 second dissolve
Focus gives you a reverse step. (as the mechanism must clunk back one 
slide to achieve this, there is a lightout for about 2 seconds)
Serial:
Here you need a timecode track input to the RCA or Cannon connectors 
on the front. This can come from a tape track or a Genisis computer.
The proprietary AVL software is needed to make the timecode, and the 
Host computer MUST have AVL (Expensive) cards. You can control up to 
15 projectors at one time (5 doves, each with 3 SAVs) and the effects 
can be stunning. 
BTW , if the manual functions dont work , replace the 74LS367 at the 
back left corner of the PCB - people tend to blow them up plugging in 
non standard remotes.
cheers, Mike
From: markz@ssc.com (Mark Zenier)
Newsgroups: sci.electronics
Subject: Re: FM stereo in TIME domain. (Was Re: How does stereo FM radio work?)
Date: 5 Oct 92 17:21:42 GMT
Distribution: na
Organization: SSC, Inc.,  Seattle, WA
X-Newsreader: Tin 1.1 PL3

jeh@cmkrnl.com writes:
: In article <1992Oct03.042813.15261@ssc.com>, markz@ssc.com (Mark Zenier) writes:
: > In article <1992Oct1.165659.8131@bnr.ca> mwandel@bnr.ca (Markus Wandel) writes:
: >>Say that everything was based on square waves, and that you started out
: >>with a 38KHz clock waveform.  Based on this clock, you alternately select
: >>the left or the right channel for transmission, transmitting a sequence
: >>of samples L, R, L, R, L, R, etc.  
: > 
: > Did any commercial gear work this way?
: 
: Someone else mentioned that at least one of Heath's top-of-the-line receivers
: did.  And many (most?  all?) recent color tvs demodulate the 3.58 MHz chroma
: subcarrier this way. 

Sorry, the question should have been: Do commerical FM stereo transmitters
work this way?  (I've been trying to come up with a cheap stable FM stereo
exciter for a couple of years.)

My speculation is that, within the broadcast community, this technique
is well known.  But outside that, most people are working off the
description from the FCC regulations, which is the frequency domain
description.  (Since they are more interested in bandwidth and 
interference than simple design.)

So you end up with things like the North Country Radio/Graf and Sheets
transmitter (Radio-Electronics March and April 1988) which used a
balanced modulator for the 38 kHz subcarrier and was overly complex.
And didn't work well, according to a friend who built one.
(Which makes sense, keeping your phase responses right through all
that would be hard.)

Mark Zenier  markz@ssc.wa.com
From: bdenckla@husc10.harvard.edu (Benjamin Denckla)
Newsgroups: sci.electronics
Subject: Re: 5 pin DIN jacks, converter boxes
Date: 6 Oct 92 20:33:06 GMT
Article-I.D.: husc3.1992Oct6.163307.16124
Organization: Harvard University Science Center


I am interested in finding:

1) A mail order source for heavy-duty, high quality, shielded 5 pin DIN
jacks (perhaps this item does not exist).  Basically the jacks one can get
at radio shack are kind of flimsy and of course not shielded.  I can make
my own shield from tin foil so my main concern is the heavy-duty part.  I
often see XLR jacks which have really heavy-duty mounting plates and I
wish I could get 5 pin DIN jacks like that.

2) The name of a company that could make me a converter box which takes a
5 pin DIN input and splits it into 4 mono 1/4" phone jacks.  (I'll make
this myself if necessary but have limited access to tools and time)

Ben Denckla
Electronic Music Studio
Harvard University
From: hampster@phys.ksu.edu (Kip J. Mussatt)
Newsgroups: sci.electronics
Subject: Re: Need small tool to cut pcb board
Date: 6 Oct 1992 12:04:09 GMT
Organization: Kansas State University
NNTP-Posting-Host: bohr.phys.ksu.edu

In <Bvnv3y.89B@acsu.buffalo.edu> v064mb9k@ubvmsb.cc.buffalo.edu (HELLO) writes:


>  I am working on a device that I want to manufacture in short numbers.
>The pc board dimensions are roughly 3*3 inches. Its much easier
>to cut my own from stock. Is there a cheap or inexpensive tools that
>could cut 1/16th inch double sided clad board neatly?

I have had good luck with a good hacksaw and a vice.  Coping saws are ok, 
but the finer blades on hacks saws seem to work better.

-Kip J. Mussatt
--
hampster@phys.ksu.edu
Newsgroups: sci.electronics,rec.motorcycles,rec.radio.cb,rec.radio.swap
From: billn@hpcvaac.cv.hp.com (bill nelson)
Subject: Re: The Communicator
Organization: Hewlett-Packard Company, Corvallis, Oregon USA
Date: Sun, 4 Oct 1992 08:39:56 GMT

Sam_-_Malone@cup.portal.com writes:
: 
: My friend is an avid snowmobiler and was just asking me about a 
: product called "The Communicator". He says this device is popular
: amoungst snowmobilers, motorcyclists and the like. I sounds like it's
: a helmet mounted communications device voice activated for
: hands free operation. It operates (according to the
: manufacturer- Collett Electronics of Winnepeg Canada) 
: on the frequencey 49.8XXX Mhz. They will not give out any more
: information about their frequency since it's their mealticket.
: What Tim would like to do is... find out if a Radio Shack
: FM wireless communicator with proper frequency
: (the default frequency of the device from RS is 49.830 Mhz)
: would work in conjunction with "The Communicator" as is,
: or if it can be slightly modified to work with it.

Yes, the RS one will work - if you can get them on the right frequency.
I seem to recall that there are about 6 channels that can be used.

They are low power, short range radios. Don't expect too much from them.

: The reason for this is (natch) that the RS one is much much
: cheaper than "The Communicator".
: 
: So, we have a couple questions:
: 1. What is the exact frequency used in "The Communicator"?
: 2. How is the performance/quality of "The Communicator" judged by those
:     of you that have used it or heard from someone who has?

See above.

Bill
From: cyberman@toz.buffalo.ny.us (Cyberman)
Newsgroups: sci.electronics
Subject: TMS340xx information
Date: 5 Oct 92 00:49:54 GMT
X-Maildoor: WaflineMail 1.00r

Anyone have any horror stories to share about working with this
chipset?
Any suggestions, hints, warnings, or help is MUCH appreciated.

    Feeling inundated :(

        Stephen Cyberman@Toz.Buffalo.NY.US
        Scripted at Sun  10-04-1992  16:32:07

... "I'm not the one that misplaced the Deltivid asteroid belt!" - Q
--- Blue Wave/QWK v2.10
From: Monty.Solomon@mailbox.bison.mb.ca (Monty Solomon)
Newsgroups: sci.electronics
Subject: Re: Info wanted on Hayes Chronograph
Date: 24 Sep 92 22:27:14 CST

Organization: Proponent
Reply-To: Monty Solomon <roscom!monty@think.com>

In article <1992Sep23.174546.1647@u.washington.edu>  
pollock@milton.u.washington.edu (Joe Pollock) writes:
> Does anyone out there remember the Hayes Chronograph, a digital clock
> with an RS-232 interface?  I recently acquired one, and have no idea
> of the default baud rate and command set syntax.  It also looks like
> this thing can have a backup battery installed;  I assume from the
> battery holder that we're talking 3 AA nicads.

3 AA alkalines.

It operates at some slow speed.  Try 300 bps.

You can try to get some help on the Hayes BBS at 800 874 2937 or 404 446 6336.


-- 
# Monty Solomon / PO Box 2486 / Framingham, MA  01701-0405
# monty%roscom@think.com

 * Origin: The Electronic Mailbox (1:348/7.0)