HDTenEightyP/NetNews huggingface dataset:
From: hougland@enuxhb.eas.asu.edu (Kriss A. Hougland)
Subject: Number for Welch Allyn (Decoder group -- HBD-POS-1)
Organization: Arizona State University, Tempe
Distribution: usa
Date: Tue, 12 Jan 1993 17:50:59 GMT

Thanks in advance for any responses.

Does anyone have a number for the Welch Allyn Decoder Products Division?

I have a barcode reader (Point Of Sale) I'm trying to get specs on.
(Heck do they still exsist?  I remember their name from a while back)

--
If were so advance, why can't people put grocery carts back where they got
them from?; Can you survive a day with out a car?
Newsgroups: sci.electronics
From: gregh@hprnd.rose.hp.com (Greg Holdren)
Subject: Re: SN75176 pinout needd
Date: Thu, 7 Jan 1993 08:43:55 GMT
Organization: HP - Systems Technology Division
X-Newsreader: TIN [version 1.1.8 PL6]


To: anto@sol.acs.unt.edu (Anto Prijosoesilo)
Subject: Re: SN75176 pinout needed
Newsgroups: sci.electronics

In article <anto.726376879@sol> you wrote:
: Hi netters,
: 
: Can anybody tell me 75176's pinout? I can't find it in any of the databooks 
: I have access to. 1990 IC Masters lists it as a bidirectional transceiver
: mfg. by TI and NS. I don't have access to a recent TI or NS databooks so I'd
: appreciate very much if anybody can give me the info.
: 
: E-mail preferred to reduce traffic, although I'll also get it if you post
: it here.
: 
: Thanks very much in advance.
: 
: Anto.
:

 Here it is: 

 1 RO    RX data out (ttl end)
 2 /RE   RX enable
 3 DE    TX enable
 4 DI    TX data in (ttl end)
 5 GND
 6 DO-RI one side of diff output
 7 /DO-/RI other side diff output
 8 Vcc +5v (7v max)

 Greg Holdren
 gregh@hprnd.rose.hp.com
From: brb@falcon.is (Bjorn R. Bjornsson)
Newsgroups: sci.electronics
Subject: Re: nicads for Gameboy?
Date: 9 Jan 93 19:22:42 GMT
Organization: Gagntaekni/Bijective Tech.

bame@hpfcbig.SDE.HP.COM (Paul Bame) writes:
>In sci.electronics, tbc@cbnewsk.cb.att.com (thomas.b.cook) writes:
>> The manual for Gameboy says not to use nicad batteries. I 
>> called their hot line where I was told that this is because
>> the nicads can explode and damage the game. What are the
>> conditions where this is a concern? I have some ideas but
>> I'd appreciate the net.wisdom interpretation of this warning.

If this is what they say on the hotline, I think the warning
in the manual is criminally negligent.  I puzzled over this
very same paragraph, and then decided to ignore it.

>> TIA,
>> Tom
>Warning or not, they work just fine.  Maybe the warning is because
>the gameboy likes to place a short across the batteries now and then
>but I've not had or seen any problems.

Really?  Is this a possibility?  Geez, I find this beyond belief.
If it's true and design "feature", no doubt Nintendo will find its
behind fried in court at some time.

NiCads work just fine in my son's Gameboy.  But I would dearly like
to have this "shorting" story confirmed.

Bjorn R. Bjornsson
brb@falcon.is
Newsgroups: sci.electronics
From: livio@paola.dei.unipd.it (Livio Plos)
Subject: Clock doubling-HELP REQUIRED
Organization: Universita' di Padova, Italia
Date: Mon, 11 Jan 1993 16:11:25 GMT

Hi to everybody,

I'm looking for an hack to double a 7MHz clock frequency keeping it syncronized
with the original clock.

I've heard that I can do this with a PLL but I don't know what components I
can use.

	Thanks in advance.		Livio Plos

---
Livio Plos 					University of Padua
Newsgroups: sci.electronics
From: athos@apple.com (Rick Eames)
Subject: The Great Debate: Sega or SNintendo?
Date: Tue, 5 Jan 1993 23:46:54 GMT
Organization: Apple Computer, Inc.
Followup-To: sci.electronics

My wife and I are debating the merits of either a Sega or a Super Nintendo
system.  What are the general opinions out there?



############################################################################
Rick Eames                         Internet:      athos@apple.com
Apple Computer, Inc.               CompuServe:    76666,2114
My Opionions are my own.           AmericaOnline: EamesR
"The Lord prefers common-looking people. That is why he makes so many of
them."  - Lincoln

"But you know what?  There's another point that I'd like to make: it's very
possible that Adolf Hitler kept a very nice check book.  You know?  I mean,
and that's fine."  -- Barbara Boxer, Bill Press Show, KFI, 10/24/92
############################################################################
From: babb@sciences.sdsu.edu (J. Babb)
Newsgroups: sci.electronics
Subject: Re: Ultrasonic Trans/Recv
Followup-To: sci.electronics
Date: 6 Jan 1993 00:45:44 GMT
Organization: SDSU - LARC
Distribution: world
NNTP-Posting-Host: larc.sdsu.edu

In article <1icacgINNn10@uwm.edu>, albrecht@csd4.csd.uwm.edu wrote:
> 	1)  Where can I purchase a relatively cheap and accurate ultrasonic
> 	    transmitter/reciever set? (Phone #, Addresses)

I don't know about a set but National Semi used to make an ultrasonic
ranging chip set: Xmtr & Rcvr in same package LM 1812 I believe. Was
outlined in their  Linear databook a few years back. 

 > 	2)  Can I get a Receiver(1) to receive more than one frequency at
 >	    once?  Say for example:
 >						)--TRANS #1
 >						)--TRANS #2
 >			RECV --(		        )--TRANS #3
 >							)--TRANS #4
 >							)--TRANS #5
 >							)--TRANS #6 

 >	   Where each transmitter (1-6) is on it own frequency?
Freq was dependent on resonant freq of transducer, 40 Khz for atmospheric
type, 200 Khz for hydrophone type (used for 'spinning neon bulb' type fish
detector). 

 >	3)  If I cannot receive these signals simutaneously, then can I
 >	    receive them in a sequence of say .25 second as such:

I believe there was a trigger or gating circuit of some type.

Jeff.
Newsgroups: sci.electronics
From: schuch@phx.mcd.mot.com (John Schuch)
Subject: Re: PC BOARD ETCHING QUESTIO
Organization: Motorola Computer Group, Tempe, Az.
Date: Mon, 11 Jan 1993 17:33:10 GMT

In article <76416@apple.apple.COM> apn@Apple.COM (Alex Novickis) writes:
>In article <1993Jan10.225053.28590@phx.mcd.mot.com> schuch@phx.mcd.mot.com (John Schuch) writes:
>>I, to, have had this problem once in a while but have found most 
>>cameramen pretty darn accurate. Another thing I ALWAYS do is include
>>a rule in the artwork. Something like this:
>
>With current laser photoplotting technology, WHY ?? whould you want to 
>do reductions ?? LP's can generate things much finer than you can
>ever hope to etch.... I think that's about 4 mil traces with 4 mil
>seperations. And it usually costs me under 10$ for a 10x10" film (OK, 
>well I do need several of them... but still)
>

- Because if all you have is printer output with marginal quality 
  (contrast), 2:1 or better 4:1 traces will appear darker to the film.

- Because you can see defects in 4:1 art much easier than you can in 1:1.

- Because some people still use tape on paper for the master artwork.

- If you use a 300 dpi printer to make your 1:1 artwork, your film will
  be 300 dpi. If you use a 300 dpi printer to make 4:1 artwork, your
  film is effectivly 1200 dpi. I don't know if it's measurable but I
  can just see fuzziness on diagonal lines etched from 300 dpi film.
  Given the variabilities in the at-home etching process, I want my
  film as absolutely perfect as I can make it.

- Because it makes the process seem more complicated, and hence, more
  impressive to the in-laws.  :-)

The absolute bottom line reason? I'm more comfortable with it. You are
correct of course that 1:1 artwork from a laser printer will provide
perfectly good film. I just prefer the added safety margin.

BTW: I've tried several of the laser-to-transfer sheet-to-pcb-etch
products ( ie. TEC-200 ) and have not have good enough results to
justify getting rid of the lito-film/expose/etch method.

John
(Anybody see the segment on CNN about internet smiley faces :-) )


John


-- 
+--------------------------------------------------------------------------+
| John R. Schuch  -  Motorola Computer Group  -  Manufacturing Engineering |
| N7XVS - schuch@phx.mcd.mot.com - (602) 438-3008 - CompuServe: 70733.3330 |
+--------------------------------------------------------------------------+
From: cyberman@toz.buffalo.ny.us (Cyberman)
Newsgroups: sci.electronics
Subject: Re: 110/220 V AC why ?
Date: 1 Jan 93 17:10:04 GMT
X-Maildoor: WaflineMail 1.00r


  Sir  spoke forth saying:
"110/220 V AC why ?" toward 
 on 12-29-92  16:01
 Ke> Hi
 Ke> I am curious to know why some countries have 110V AC supply
 Ke> and some 220V AC as their main line voltage ?
 Ke> Any paticular reason for selecting any one number ? Is there
 Ke> any talk of standardizing this like SI syatem of measurement ?

    110 is "safer", 220 lets them use lower guage wiring (aka
    CHEAPER).  My house is wired for both (US).  Of course the
    arc welder and air compressor use that.  The electric range
    though is gone.  220 is great for high power devices (5kw arc
    welder 3hp air compressors and killowatt ranges).  110 can be
    easily derived from 110.

    It also has to do with HOW power became available in that
    particular country.

                Stephen Cyberman@Toz.Buffalo.NY.US
             Mangled on Thu  12-31-1992  at 12:50:38

... A frank and honest face could destroy reality.
---
 * Blue Wave/QWK v2.11 *
Organization: Middle East Technical University - Computer Center
Date: Tuesday, 12 Jan 1993 13:54:59 TUR
From: <C70861@TRMETU.BITNET>
Newsgroups: sci.electronics
Subject: HCB Pilot Wire Protective Relay Analysis : Required

  I am looking for the documents and papers showing the complete analysis
concerning the operation/restrain of the HCB/HCB-1 systems.

  Any information regarding the sites where I can find the required analysis,
inforamtion,papers would be highly regarded.

  Please don't send follow-ups,or posted articles.Direct e-mail downloaded to
the following account would be much more preferrable.

E-Mail:c44500@TRMETU.BITNET

        THANKS IN ADVANCE ..
From: wellison@kuhub.cc.ukans.edu
Newsgroups: sci.electronics
Subject: Re: Ancient Scope Info Required
Date: 7 Jan 93 10:21:16 CST
Organization: University of Kansas Academic Computing Services

Well, I scrounged up the manuals and copies of mine. I'll drop them in the mail
tomorrow to you. Consider it a gift from one old Tek fan to another ;-)

-=-= Wes =-=-
Newsgroups: sci.electronics
From: kennehra@craft.camp.clarkson.edu (Rich"TheMan"Kennehan)
Subject: What is a "latch"???
Organization: Clarkson University
Date: Tue, 12 Jan 1993 23:46:11 GMT



Hi.  I'm just getting into electronics and I've noticed that one
pin on my Nintendo controller is called a "data latch" pin.  What is
this?  Thanks in advance!

- Rich
  kennehra@logic.camp.clarkson.edu
From: iisakkil@lk-hp-13.hut.fi (Mika Iisakkila)
Newsgroups: sci.electronics
Subject: Re: PC VLSI Design package
Date: 6 Jan 93 10:45:14 GMT
	<1ickg8INNgt0@sdl.Warren.MENTORG.COM>
Organization: Helsinki University of Technology, Finland

garyg@warren.mentorg.com (Gary Gendel) writes:
>We just need to determine if there is enough interest to warrant this effort.

There certainly is. Not many people want to desing VLSI chips at home,
but the logic simulator would be a gift from heaven. I've seen some
free logic simulator programs, but these have been only marginally
useful as they didn't allow one to specify any real-world parameters
like propagation delays in gates (or were too limited to compete with
the pen-and-paper method). Think of it as converting poor students
into potential buyers when they get a job :-)
--
Segmented Memory Helps Structure Software
Newsgroups: sci.electronics
From: markz@ssc.com (Mark Zenier)
Subject: Re: Vector wire pencils (and wire-wrap, and ScotchFlex)
Organization: SSC, Inc.,  Seattle, WA
Date: Thu, 07 Jan 1993 23:32:20 GMT
X-Newsreader: TIN [version 1.1 PL6]

jeh@cmkrnl.com wrote:
: In article <1993Jan3.004714.27542@softwords.bc.ca>, jmacphai@cue.bc.ca 
: (James MacPhail) writes:
: > You guys are aware of ScotchFlex, right? If not, check it out. It is made
: > by 3M (and thus tends to be considered over-priced by some).
: > 
: > It is composed of IDC forks that go through the perf-board from the
: > wire side, and DIP sockets that plug on from the component side. The 
: > forks stand out about 0.1" and will take 2-3 layers of wire. Wiring,

Three wires is pushing it.  The first experience a coworker had with
this, he overloaded a fork, and the wire on the bottom got broken.

: I think ScotchFlex is *great* for prototyping and debug.  It is FAR more
: convenient than WW for debug -- because it's a lot easier to change.  Of 
: course
: I'd never ship a product, not even a one-of-a-kind, that used it -- but that's
: not what it's for. 

Seconded.  The wires are also vulnerable to breaking with a side to 
side motion, as the IDC fork has scored them.  I find a prototype to
be good for about an month of messing around, and then it gets flakier
than you can stand.  But since I figure it to be 5 times faster than
wirewrapping, it's worth it.

Do Robinson-Nugent and Vero still make competitive stuff?  They were
both in the form of pin/sockets that had to be staked into a laminate.

Mark Zenier  markz@ssc.wa.com  

Newsgroups: sci.electronics
From: Mike Diack <mike-d@staff.tc.umn.edu>
Subject: Re: question about AF signal transformers
X-Xxmessage-Id: <A77307FF07026503@dialup-slip-1-3.gw.umn.edu>
X-Xxdate: Fri, 8 Jan 93 10:29:19 GMT
Organization: persian cat & carpet co.
X-Useragent: Nuntius v1.1.1d7
Date: Thu, 7 Jan 1993 21:21:34 GMT

In article <luke.726426475@barney> Luke Whitaker, luke@cs.city.ac.uk
writes:
>Is there any technical reason why small signal AF
>transformers are a problem - I don't understand transformer technology
very
>well. The small transformers that are available seem to have frequency
>responses way above audio. I saw some post here about why HF
transformers can
>be smaller than AF transformers, although the original post has expired
on this
>site. Does this imply that AF transformers *are* readily available,
albiet 
>physically large ?

There are several issues here :
Availability : Audio trannies are available in just about any config
you desire - the big problem is cost 
Jensen (California) make all manner of *extremely expensive* ones
aimed at the professional audio (mixers, PA co's,studios) market
Entry price - about $20 up (and up...and up) cheaper by the 1000
Sowter (UK) cover the same market, also Pico etc do a broad range
of devices - telephone up to pro-audio quality. There are many other
manufacturers. - At the other end of the market is the scungy little
trannies you find in modems, Rat shack shelves etc. These are low fi
in the extreme. - this brings us to 
Size : Broadly speaking, the bigger the better. The more iron, the less
likely the thing is to saturate at low frequencies/high drive levels.
There are other factors such as interwinding capacitance, core quality
Winding interleaving etc, all of which contribute to the quality (or 
lack of) of the device. You get what you pay for. I too would love to
hear of a budget supplier of superb quality transformers (BTW it 
pays to hang around recording studios, tv studios etc that are being
torn apart)
cheers
	Mike.
Newsgroups: sci.electronics
From: schuch@phx.mcd.mot.com (John Schuch)
Subject: NINTENDO: How do ya clean'um
Organization: Motorola Computer Group, Tempe, Az.
Distribution: usa
Date: Thu, 7 Jan 1993 17:07:14 GMT

The game carts for my kids Nintendo are really getting flakey. I'v
found that if I clean the contacts with Q-tips and alcahol, they
work for a couple of days but quickly crap-out again. Anybody
know the proper ( or at least a better ) way to solve this problem?

Thanks,
John

-- 
+--------------------------------------------------------------------------+
| John R. Schuch  -  Motorola Computer Group  -  Manufacturing Engineering |
| N7XVS - schuch@phx.mcd.mot.com - (602) 438-3008 - CompuServe: 70733.3330 |
+--------------------------------------------------------------------------+
Newsgroups: sci.electronics
From: drury@esvax.dunet.dupont.com (Robert F. Drury)
Subject: Re: Flywheel batteries as EV power source
Followup-To: sci.electronics,sci.energy,rec.autos
Organization: Du Pont Electronics
Date: Thu, 7 Jan 1993 12:55:20 GMT

In article <1992Dec28.220947.19148@michael.apple.com>,
ems@michael.apple.com (E. Michael Smith) wrote:
> 
> In article <1hnnrdINNnna@gap.caltech.edu> carl@SOL1.GPS.CALTECH.EDU writes:
> >In article <1992Dec22.204130.18133@enterprise.rdd.lmsc.lockheed.com>, () writes:
> >=Obviously this fluff created by a failed flywheel is not exactly safe.  But
> >=you contain this fluff inside another carbon carbon shell such that the
> >=expanding hot fluff makes more fluff until the energy is such that it can
> >=be contained by a container.  The object is not to stop the flywheel failure
> >=at any given point, but to slow it down and cause it to loose energy.  
> >
> >Yup.  Now, since someone has calculated that the flywheel is storing enough
> >energy to VAPORIZE 40 kilograms of iron, just how big is your containment
> >system going to be?  Will there be room for people in the car?
> 
> Hmmm ... an interesting question arises from this oft' posted phrase
> 'VAPORIZE 40 kilograms of iron' ...  Since this is only 88 lbs of
> stuff (and my car weighs about 2000lbs) it isn't THAT much of a 
> weight penalty ...  So just how much of a very high heat of vaporization
> substance would it take to absorbe the heat as phase change?  Say, for
> example, water?  (Or whatever is even better suited...).  If one could
> wrap the flywheel in a 200 lb water jacket and still be lighter than
> a lead/acid battery pack, it might still be 'reasonable' ...
> 
> Now, getting all that KE dumped evenly into the water jacket could be
> quite a trick ;-) and will be left as an excersize for the reader ;-) ;-)
> 
> -- 
> 
> E. Michael Smith  ems@apple.COM
> 
> 'Whatever you can do, or dream you can, begin it.  Boldness has
>  genius, power and magic in it.'  -  Goethe
> 
> I am not responsible nor is anyone else.  Everything is disclaimed.

    Well, I just can't let this one pass...I have to add my $.02 to this
*interminable* thread.  Would anyone out there care to be in the same car,
or for that matter within several hundred yards of a car, where 200 lb of
water had suddenly and very rapidly been converted to superheated steam? 
This would convert the whole car and occupents (sp?) to a large
fragmentation grendade.  Just because something is vaporized does not mean
it is rendered harmless; hot, expanding gases are what do the damage in all
explosions.  When water is vaporized, it's volume increases ~1000X, so that
200lb of water(25 gallons) suddenly wants to take up 25,000 gallons; wants
to *bad*.  If constrained to remain at its original volume, it will be at
1000 atmospheres, attained within microseconds.  The pressure vessel
capable of containing this *will* weigh more than a battery pack, or a car.
From: hampster@phys.ksu.edu (Kip J. Mussatt)
Newsgroups: sci.electronics
Subject: tone decoder
Date: 10 Jan 1993 07:21:25 GMT
Organization: Kansas State University
NNTP-Posting-Host: bohr.phys.ksu.edu
Keywords: tone decoder 567

I am working on a circuit that receives a 50 KHz signal from a source 
and is suppose to use a phase-locked-loop and a reference signal that 
it compares the frequency to.   When the frequencies match within 
a given tolerance, one of the pins of the 567 goes low, thus lighting
an LED or whatever.  I would like the advice of ppl who have used 
this chip before and are familiar with its quirks, idiocyncracies, (sp?) 
etc.  The chip has trouble locking onto the incoming signal.  Here
is the circuit:
 

                           In
                           |
                           |
                2.2uf  ---------
		+-|(---|1  3   |
		|      |       |
          .01uf +-|(---|2     8|----- Out
		|      |  567  |
		|      |       |      .02uf
		+------|7     6|---+--|(--+
		|      |   5   |   |      |
                |      ---------   |      |
                |          |      \|/     |
               GND         +----/\/\     GND
                                 10K


I hope the circuit helps.  I would appreciate advice from someone that
has experience with this chip.  Also, I need to give the 50 KHz
frequency at very high pulses, about 10 KHz pulses.  If that won't  
work, that is ok, but I do need to pulse the frequencies at the chip
very fast, it is being used to interface with a PC via the serial 
port.  I have the other support chips, circuits all working well, this
chip is being a real pain.  Finally, the chip will not work at 5 volts
which it is rated to work at, but does seem to work somewhat ok from
8.5 - 9.0 Volts.  Thanks in advance. :)  

-Kip Mussatt

hampster@matt.ksu.ksu.edu  ||  hampster@bohr.phys.ksu.edu
--
----------------------------------------------------------------------------
"Minor incidents with funny rays can have serious consequences, Shredder!"

     								 -Krang
Newsgroups: sci.electronics
From: henry@zoo.toronto.edu (Henry Spencer)
Subject: Re: PC board etching question
Date: Tue, 5 Jan 1993 21:16:08 GMT
Organization: U of Toronto Zoology

In article <1993Jan5.162702.18205@organpipe.uug.arizona.edu> dlatimer@iris4.chem.arizona.edu (Darin Latimer) writes:
>Is it possible to do your own through hole plating?  I have seen the
>press in rivet type vias but was warned away from them as they tend to 
>form flaky connections.  How is the through hole processing completed at a 
>board house? ...

They drill the holes, prepare the surfaces carefully, plate a very thin
layer of copper on chemically, and then thicken it with an electroplating
process.  That's a one-sentence summary of a complex and tricky process.
It is not practical as a do-it-yourself exercise, not if you want reliable
results.  Getting it to work dependably requires precise control of things
like temperature and solution chemistry, which means spending several
kilodollars on professional-grade equipment.
-- 
"God willing... we shall return."       | Henry Spencer @ U of Toronto Zoology
       -Gene Cernan, the Moon, Dec 1972 |  henry@zoo.toronto.edu  utzoo!henry
From: feg@cbnewsb.cb.att.com (forrest.e.gehrke)
Newsgroups: sci.electronics
Subject: Re: RS 232 & RS-422 voltage specs wanted
Date: 7 Jan 93 19:41:54 GMT
Distribution: na
Organization: AT&T

In article <1993Jan7.160410.28308@newton.ccs.tuns.ca> maceacla@newton.ccs.tuns.ca (Leonard Alexander Maceachern) writes:
>Where can one access specifications for the RS232 standard?
>
>Thanks.


It's been awhile since I last requested EIA specs but they 
charged me $15.00 then.

Here is their address:

Electronic Industries Association
Engineering Department
2001 Eye Street, N.W.
Washington, DC 20006
(202) 457 4966

Forrest Gehrke feg@dodger.att.com
Newsgroups: sci.electronics
From: povlphp@uts.uni-c.dk (Povl H. Pedersen)
Subject: Wanted: 26LS30
Organization: UNI-C, Danish Computing Centre for Research and Education
Date: Tue, 5 Jan 1993 19:10:48 GMT

My one 26LS30 (surface mounted :-( on my SE/30 has a dead TxD line.
So I am looking for another one. I stille have the inverse signal of the
TxD, so if somebody can recommend a chip that converts +3.5V to -3.5V
and -3.5V to +3.5V on the same line then I will consider building an
inverter instead.
-- 
Povl H. Pedersen   -   Macintosh specialist. Knows some DOS and UNIX too.
pope@imv.aau.dk    -   povlphp@uts.uni-c.dk
Organization: Administrative Computing & Info Services, Carnegie Mellon, Pittsburgh, PA
Newsgroups: sci.electronics
Date: Fri,  8 Jan 1993 13:56:27 -0500 
From: "Brian E. Gallew" <geek+@CMU.EDU>
Subject: Telephone "in use" light

I know this subject has been discussed to death, but will someone with
working schematics please send me a copy?  I have suddenly developed a
need for this.

                                  -Brian

-------------------------------------------------------------------------
| "Are they dead?"                                                      |
| "Does it matter?"                                                     |
|   - Pugsley and Wednesday in "The Addams Family."                     |
-------------------------------------------------------------------------
Newsgroups: sci.electronics