HDTenEightyP/NetNews huggingface dataset:
From: mark stephens <stephens@kong.gsfc.nasa.gov>
Subject: X-10 any plans around?
X-Xxmessage-Id: <A75B53B02801EC3D@mstephens.gsfc.nasa.gov>
X-Xxdate: Mon, 21 Dec 92 10:57:52 GMT
Organization: NASA/GSFC
X-Useragent: Nuntius v1.1.1d12
Date: Mon, 21 Dec 92 15:56:12 GMT

X-10 is a way to remotely send signals to turn on/off devices thru house
wiring.  Is this proprietary or can one get plans to 'roll your own'?  
Are there any similar, thru the house message sending, schematics around?

thanks!
    mark
Newsgroups: sci.electronics
From: philip@mentorg.com (Philip Peake)
Subject: Re: Pulse Shaping...
Date: Mon, 21 Dec 1992 22:20:37 GMT
Organization: Mentor Graphics
Keywords: 
Followup-To: 

In article <BzMEHo.66s@ncifcrf.gov>, digennar@fcs280s.ncifcrf.gov (Frank S. DiGennaro) writes:
|> 
|> This might be a dumb question, but here goes. If I put a sine wave of frequency
|> F into a series of N flip-flops, the output will be a square wave of frequency
|> F/2^N. How do I re-shape it back to a sine wave?

You pass it via a low pass filter, with the cut-off frequency at F/2^N.

If I didn't know how "digitalised" most current electronics courses
have become, I would class this as a dumb question - but given the
current (excessive) digital bisa - you are forgiven :-)

Philip
Newsgroups: sci.electronics
From: jmorriso@ee.ubc.ca (John Paul Morrison)
Subject: Re: Problem with 68hc705 eval. kit
Organization: University of BC, Electrical Engineering
Date: Fri, 1 Jan 1993 23:20:24 GMT

In article <1993Jan1.162603.6390@desire.wright.edu> cse0239@desire.wright.edu writes:
>I got the 68hc705kics kit and it seems to work correctly on everything
>except blank check of the part. Has anyone had success blank checking
>an erased part? 

yes, it does succesfully blank check the part.

The 68hc705k1s part takes a little while to erase (around 17 minutes) so
maybe you just have to stick it in the eraser for longer.
>
>Could this be a problem with my I/O port?
>
>


-- 
__________________________________________________________________________
 John Paul Morrison                     |  
 University of British Columbia, Canada |  
 Electrical Engineering                 |   .sig file without a cause
 jmorriso@ee.ubc.ca              VE7JPM |  
________________________________________|_________________________________
From: ylo@osiris.kbfi.ee (Ylo Mets)
Newsgroups: sci.electronics
Subject: Re: Basic bench equipment query
Date: 27 Dec 92 17:24:40 GMT
Organization: Institute of Chemical Physics and Biophysics, Estonia
NNTP-Posting-Host: osiris.kbfi.ee
X-Newsreader: TIN [version 1.1 PL8]

jeh@cmkrnl.com wrote:

> I'll second this, and LOUDLY, too.  

> It appalls me to see frequency counters (and instruments like DMMs that include
> counters) that have no trigger level control, no input coupling selector (AC or
> DC), no edge selector (rising or falling).  You wouldn't buy a triggered-sweep
> scope without such controls; of what possible use is a counter without them? 


> 	--- Jamie Hanrahan, Kernel Mode Consulting, San Diego CA
> Internet:  jeh@cmkrnl.com, hanrahan@eisner.decus.org, or jeh@crash.cts.com
> Uucp:  ...{crash,eisner,uunet}!cmkrnl!jeh

To be more specific, Fluke 87 has some choices for triggering:
on 400 mV ac range about 150 mV sensitivity, no offset,
on dc ranges the trigger level is about 10% of the range,
except for the 4 Vdc, which is meant for TTL with 1.7 V
threshold. One can even choose rising or falling edge.
It should also work on current measurement ranges.

I agree with the opinion that a counter cannot be used to
determine the waveform, one can measure the frequency of a
known waveform with much higher accuracy than a scope allows.
In case of slightest suspicion in the readings of a counter
you need an oscilliscope.

Ylo Mets.
Newsgroups: sci.electronics,sci.energy,rec.autos
From:  ()
Subject: Re: Flywheel batteries as EV power source
Date: Wed, 23 Dec 92 00:28:33 GMT

In article <51698@seismo.CSS.GOV>, stead@skadi.CSS.GOV (Richard Stead) writes:
> 
> In article <1992Dec22.204130.18133@enterprise.rdd.lmsc.lockheed.com>,  writes:
> > In article <51694@seismo.CSS.GOV>, stead@skadi.CSS.GOV (Richard Stead) writes:
> > > 
> > > Flame on....rampant idiocy...real butt-head...butt-head...pup.
> > >...remain ignorant...

And when Stead actually mananges to make a point...

Wait there's one here somewhere...

> the way the molecules work is that you
> must do work against the molecules to separate them, but once separated,
> they snap back, releasing the acculmulated strain energy as heat.  That's
> right, energy is conserved, and a pile of shredded composite does not
> represent more energy than the whole piece.  Entropy simply means that
> energy has been converted to heat.

Unfortunately wrong, and very sloppy.  Take a ream of paper and turn it into
scraps and tell me you haven't expended energy.  That energy came from the 
flywheel hense the fluff does not have the same energy as the initial flywheel.  
Energy has been used bending molecules, which may or may not snap back, but
more significantly in breaking bonds which originally held the flywheel
together.  Now if you've got the inter fiber bond strength of a material of
carbon carbon fibers we could use for a fly wheel, your a hell of a lot 
farther ahead that most in the carbon carbon field.  Now is this energy enough
to make the fluff safe, I don't know, that's why I asked.  Remember that
carbon carbon bonds are one of the strongest bonds around, thats why we
want to use carbon carbon in the first place.  

> I repeat for the billionth time, energy is conserved!

Can't you listen to your own point?

> 
> > > I'm really tiring of this nonsense, so while I politely corrected the
> > > first posters in their misconceptions - you get flamed, boy.
> > > 
> > > > >My opinions are my own.
> > > 
> > > Good thing - they're pretty damned stupid for anyone else.
> > 
> > Gee thanks for your help in keeping this discussion open and moving forward.
> 
> You're welcome.  Why don't you try helping a bit instead of flaming
> when you don't know what you're talking about.
> --
> Richard Stead
> Center for Seismic Studies
> Arlington, VA
> stead@seismo.css.gov

I guess you'd better keep your gov job.  This sort of attack science doesn't
cut it out here.

Darin Olson
R&DD
LMSC
Palo Alto, CA

> 
> 
Xref: sparky sci.electronics:21438 sci.energy:6386 rec.autos.tech:17089
From: mwilson@ncratl.AtlantaGA.NCR.COM (Mark Wilson)
Newsgroups: sci.electronics,sci.energy,rec.autos.tech
Subject: Re: Flywheel batteries as EV power source
Date: 23 Dec 92 01:55:56 GMT
Organization: NCR Engineering and Manufacturing Atlanta -- Atlanta, GA

In <1h7r1iINNqo5@access.usask.ca> choy@skorpio.usask.ca (I am a terminator.) writes:

|The particles will fly off linearly, but what if the housing surrounding the
|flywheel was turning? Then the breaking flywheel may just cause the housing
|to turn faster. The flywheel particle momentum is lost with a less
|forceful impact (prolonged impact) because the turning housing is moving at
|a lower speed relative to the flywheel particles (which in turn move at a
|lower speed relative to the housing). It's a flywheel inside a flywheel inside
|a flywheel.

Unless the vessel is spinning at a significant fraction of the rotors
velocity, there will not be time to transfer a significant amount of energy
to it, before the shock waves tear it apart.  Then again if it were spinning
that fast, it would already be under a lot of stress and would need less
of a shock to cause a catastrophic failure.

Sounds like your working on the idea of multiple flywheels, so that each
wheel needs to carry less kinetic energy.

-- 
Mob rule doesn't become any prettier, just because the mob start to call itself
a government.
It ain't charity if you are using someone else's money.
Mark.Wilson@AtlantaGA.NCR.com
Xref: sparky sci.electronics:21360 misc.wanted:10367
From: krouth@slee01.srl.ford.com (Kevin Routh)
Newsgroups: sci.electronics,misc.wanted
Subject: WANTED: Receiving tube manual...
Date: 22 Dec 1992 13:28:03 GMT
Organization: Ford Motor Company Research Laboratory
NNTP-Posting-Host: slee01.srl.ford.com
X-Newsreader: Tin 1.1 PL5

Hi,

I'd like to get a copy of an old receiving tube manual, maybe RCA.  If
someone has one collecting dust, please e-mail me.  I really don't want
to pay too much, however.  Thanks.

Kevin

--
Kevin C. Routh                     Internet:    krouth@slee01.srl.ford.com
Ford Electronics                   IBMmail (PROFS):               USFMCTMF
ELD IC Engineering
17000 Rotunda Drive, B-121         Voice mail:              (313) 337-5136
Dearborn, MI  48121-6010           Facsimile:               (313) 248-6244
From: amindlin@cbnewse.cb.att.com (alan.j.mindlin)
Newsgroups: sci.electronics
Subject: Mostek F8
Keywords: don't laugh
Date: 30 Dec 92 19:41:48 GMT
Distribution: na
Organization: AT&T

Please don't laugh, but...

Does anybody out there have an old Mostek F8 Evaluation Kit* sitting in
their junk drawer? Or at least the chip set? Or at least the chip with the
ROM in it? I've been feeling nostalgic lately. I would be willing to
pay shipping and then some.

						Alan J. Mindlin

* A classic machine which took 3 40 pin dips for the processor and had
a whopping 1K of memory and could talk at up to 300 baud.
Xref: sparky sci.electronics:21375 sci.energy:6352 rec.autos.tech:17062
From: mwilson@ncratl.AtlantaGA.NCR.COM (Mark Wilson)
Newsgroups: sci.electronics,sci.energy,rec.autos.tech
Subject: Re: Flywheel batteries as EV power source
Date: 22 Dec 92 14:37:40 GMT
Organization: NCR Engineering and Manufacturing Atlanta -- Atlanta, GA

In <72182@cup.portal.com> Ted_Eugene_Viens@cup.portal.com writes:

|Sorry, Carl.  But this description of a lightweight composite Flywheel Battery
|comes from A cutaway drawing by some manufacturer in the last issue of Popular
|Science.  It clearly demonstrated a central metal axle shaft, the composite
|flywheel, and the coils for electric power transfer.  Unfortunately I have neve
|r
|obtained a CRC Physical Sciences reference book and I am a bit weak on various 
|heats of melting and vaporization.  Some crude calculations showed that to go
|600 miles at 60 mph might take some 100 to 400 MegaJoules.  Nothing to snitch a
|t
|I agree.  However this would be non-stop driving.  which is contrary to the 
|intended use of these vehicles in stop and go city driving.  What  reduction 
|factor would be introduced by regenerative braking?

I would say none.  If the regenerative breaks are 100% efficient, then you
will merely recover all of the kinetic energy resident in the car.

|Still, I return to my original opening remark.  I have some faith in the engine
|ers
|responsible for designing Flywheel Batteries...

Your faith is touching.  Do you apply the same amount of faith to everyone
who tries to sell you something.
-- 
Mob rule doesn't become any prettier, just because the mob start to call itself
a government.
It ain't charity if you are using someone else's money.
Mark.Wilson@AtlantaGA.NCR.com
From: bob@kc2wz.bubble.org (Bob Billson)
Newsgroups: sci.electronics
Subject: Re: Building IBM PC TDD (need UART info)
Date: 20 Dec 92 21:33:32 GMT
Distribution: na
Organization: Color Computer 3: Tandy's 'game' machine

mikel@networx.com (Mike Lempriere) says:
>I'm building a TDD (Telecommunications Device for the Deaf) interface
>for my IBM PC.
>
>Several years ago, I built a phone line coupler, and analysed TDD signals
>by means of timing loops on my Apple ][.  From this, I determined a bunch
>of stuff, but due to the nature of my testing mechanism, I'd like
>confirmation of these details:
>
>a)  TDD baud rate is 45.5 baud (sheesh).
>b)  Basic carrier (space tone) is 1400Hz.
>c)  Mark frequency is 1800Hz.

Mark and space are inverted from the more familiar computer modems.  If
you hack an old computer modem, you will need to invert the RS-232 data
or you will get garbage.

>d)  There is always 1 mark start bit.
>e)  There are 5 data bits.
>f)  There is always 1 space stop bit.  (Would 1.5 or 2 work too?)

g)  The carrier (but not the connection) must drop ~1 second after the
    last character is sent.
h)  Weitbrecht (TDD) modems are half-duplex.
-- 
  Bob Billson, KC2WZ                          | internet: bob@kc2wz.bubble.org
  $nail:  21 Bates Way,  Westfield, NJ 07090  | uucp:     ...!uunet!kc2wz!bob

  "Professional ear piercing--while you wait!"  --sign in local jewelry store
From: bob@kc2wz.bubble.org (Bob Billson)
Newsgroups: sci.electronics
Subject: source for N cell nicads
Summary: looking for a few good cells...
Keywords: nicad source
Date: 1 Jan 93 20:47:10 GMT
Distribution: na
Organization: Color Computer 3: Tandy's 'game' machine

Hello netters...

I need a couple (9 to be precise) of 450 mAH nicads.  Problem is they need
to be N cells.  Radio Shack sells N size nicads but they are only 150 mAH.

I need to replace the batteries in my old 2 meter HT.  After 10 years and
many recharges, the original cells have finally bite the dust.

Can anyone point me to a source?  I tried the original manufacture, but they
want a small fortune in addition to my first born child.  Surely, it can done
without giving up the child (if I had one to give). :-)

Thanks for the help.

     Bob
-- 
  Bob Billson, KC2WZ                          | internet: bob@kc2wz.bubble.org
  $nail:  21 Bates Way,  Westfield, NJ 07090  | uucp:     ...!uunet!kc2wz!bob

  "Professional ear piercing--while you wait!"  --sign in local jewelry store
Xref: sparky sci.electronics:21383 sci.energy:6358 rec.autos.tech:17064
From: stead@skadi.CSS.GOV (Richard Stead)
Newsgroups: sci.electronics,sci.energy,rec.autos.tech
Subject: Re: Flywheel batteries as EV power source
Date: 22 Dec 92 16:22:34 GMT
Followup-To: sci.energy

In article <72182@cup.portal.com>, Ted_Eugene_Viens@cup.portal.com writes:
> flywheel, and the coils for electric power transfer.  Unfortunately I have neve
> r
> obtained a CRC Physical Sciences reference book and I am a bit weak on various 
> heats of melting and vaporization.  Some crude calculations showed that to go
> 600 miles at 60 mph might take some 100 to 400 MegaJoules.  Nothing to snitch at

400 is about right.

> I agree.  However this would be non-stop driving.  which is contrary to the 
> intended use of these vehicles in stop and go city driving.  What  reduction 
> factor would be introduced by regenerative braking?

negative reduction!!  Or are you one of those free-energy fanatics who believe
that you can get more energy out of a process than you put in?

Come on!!!

You put energy into the car to get it up to speed.  Then you brake - any energy
recovered would be less than or equal to the energy needed to get it back up to
speed.  We all know from entropy, however, that you won't get all the energy
back from regenerative braking.  Therefore, and note carefully:

Stop and go driving will require MORE energy, not less.

That's right - why do you think city mpg are less than highway?  I mean, for
city dirving, since the velocities are lower, you fight less air resistance -
in you naive system, city driving would have better mpg.

You want 600 miles of city driving, even with regenerative braking, be prepared
for Gigajoule flywheels that will melt entire the entire vehicle and leave a
hole in the street on failure.

> Still, I return to my original opening remark.  I have some faith in the engine
> ers
> responsible for designing Flywheel Batteries...

Really?  Hey, I got some prime Florida real estate to sell you.
We could really make some bucks off this pup's "faith".


--
Richard Stead
Center for Seismic Studies
Arlington, VA
stead@seismo.css.gov
From: jjw@precipice.chi.il.us (John Welch)
Newsgroups: rec.radio.amateur,sci.electronics
Subject: Re: IRF 511 as RF Power Amp
Date: Mon, 21 Dec 92 11:18:18 CST
Organization: Welch Research, McHenry IL, USA

slovell@milton.u.washington.edu (Sherman Lovell) writes:

> 	In the April '89 QST Doug DeMaw wrote about using
> the IRF 511 Mosfet as a RF Power amplifier.  Wes Hayward then
> wrote an excellent follow-up article in the Nov '89 QST.  I'm
> wondering if anyone has experimented with these transistors and
> circuits.  Specifically,  I'm puzzled by the fact that neither
> DeMaw nor Hayward seems to have run into trouble with these
> transistors' considerable input capacitance -- the 511 has about
> 100 pF and the IRF 530 that Hayward used has about 900pF!

    It's simple - they don't actually *build* and *test* those
designs - they look OK on paper so that's what gets published.

    I shouldn't complain about this - if it hadn't been for
DeMaw's fascinating approach to analog circuits, I'd have never
designed a Direct Digital Synthesized radio.  I suppose I owe him
much thanks ;-)

73 de N9JZW / NNN0WY
Newsgroups: sci.electronics
From: andy@laguna.santafe.edu (Andy Mell)
Subject: Re: lasers/collimated light i
Date: Thu, 31 Dec 92 21:03:55 GMT
Organization: Santa Fe Institute
Distribution: sci

In article <1992Dec31.072835.7253@netcom.com> nagle@netcom.com (John Nagle) writes:
>"glen mead" <glen.mead@canrem.com> writes:
>>jlange@radian.uucp (John Lange) writes:
>>JL>In nightclubs I have recently seen light effects which apparently
>>JL>use bright red, green, and blue lasers which are modulated with
>>JL>mirrors (I think) to do interesting things like project color
>>JL>images on a wall.  The red could be a simple He-Ne laser, but what
>>JL>about the green and the blue?  
>
>      I suspect you are seeing a xenon lamp fronted by a color wheel and
>mirror galvonometers, all computer controlled.  These are now a common

Indeed, the gadget is called a Scanner, popular makes are Roboscan and Robozap,
they consist of a color wheel (gobi), a pattern gobi and a shutter along with
an Xenon MSR1200 lamp (1.2kW). The scanners are chained together in a bus
network configuration, the whole lot is run by a PC (Roboscan 2032 controller
is a PC AT) A top of the range Roboscan costs approx 8000 dollars.

Something that looks more like a laser is called an Emulator, they are made
by a nevada company, whos name escapes me at the moment.

Anyone here built any disco lighting effects? I'd like to hear from you.

Andy



-- 
-------------------------------------------------------------------------------
Andy Mell, Applied Physics Department,  |   andy@santafe.edu
University of Hull, Hull, HU7 6RX       |   amell@nyx.cs.du.edu
England.                                |   torq@gnu.ai.mit.edu
From: alex@anat3d1.anatomy.upenn.edu (Alex Shrom)
Newsgroups: sci.electronics
Subject: RF transmitters, cellular phones
Date: 26 Dec 92 03:13:59 GMT
Organization: University of Pennsylvania


	I need concise schematics for small, low-power RF transmitters
(preferably FM). I have a basic knowledge of electronics and am handy
with a soldering iron, but I really need these circuits spelled out
for me. I would appreciate transmitters powered both by batteries and
by phone line current (while still allowing normal operation of the
phone).
	Recently, I also rec'd a cellular phone that I have no use for
as-is (can't afford to subscribe), but is otherwise in perfect working
order. What can I do with it (other than using the battery, etc.)? Can
I program it to listen in on active cells, switch cells to follow a
call, etc.?
	Thanks in advance--leave all replies here.
Newsgroups: sci.electronics
Subject: Best way to program 68hc705 series
From: <DI3QC@CUNYVM.BITNET>
Date: Friday, 25 Dec 1992 23:03:49 EST
Organization: City University of New York/ University Computer Center

     I am planning to do some work using motorola's 705 series probably somethi

ng like the 705c9,d9 or t3. My question to anyone out there that has worked
with this series is what is the best way to program these. Are there any ways
to program these that dont require a programmer board and an eprom with a
copy of the code. I would like to just have a serial programmer do the work
from a pc. I dont want to spend any big bucks. Any suggestions or info on
programming these controllers would be great. Thanks


                                                    Alex Jeannopoulos
From: baden@sys6626.bison.mb.ca (baden de bari)
Newsgroups: sci.electronics
Subject: Re: Looking For...74S14
Date: Thu, 24 Dec 92 22:45:11 CST
Organization: System 6626 BBS, Winnipeg Manitoba Canada

 
        Re: 74S14
 
                Have you tried B.G. Micro? 
        The phone number is:  214-271-5546

                Hope this helps.
        >>Baden<<

Xref: sparky sci.electronics:21648 sci.energy:6465 rec.autos.tech:17188
From: reynhout@cs.uri.edu (Andrew)
Newsgroups: sci.electronics
Subject: Re: Origin of 'BNC'
Keywords: BNC CONNECTORS HISTORY QUESTION
Date: 29 Dec 92 02:50:00 GMT
Organization: University of Rhode Island, Computer Science Dept.

In article <1992Dec17.201022.9979@tc.fluke.COM> strong@tc.fluke.COM (Norm Strong) writes:
>In article <BzBMr3.E7K@world.std.com> dlowe@world.std.com (Miller Lowe) writes:
>}We have a raging debate going on at work with some folks beliving
>}that BNC stands for British Naval Connector.... While others(Like
>}me) say Bayonet-Neill-Concelman.
>
>Well, we KNOW that the C connector was invented by Concelman, and we
>KNOW that the N connector was invented by Neill.  We might extrapolate
>that BNC is Bayonet-Neill-Concelman, and TNC is Threaded Neill-Concelman. 
>
>But, we could be absolutely WRONG.  

   I like Horowitz & Hill's expansion: "Baby Neill Connector".  :-) 
   BNC and TNC ("Threaded ...") certainly resemble N connectors...so perhaps
there is some sensibility to it...
-- 
   Andrew <reynhout@cs.uri.edu>    "If you remind me of my dog,
                                    we'll probably get along"  -jane siberry
   meow
Newsgroups: sci.electronics
From: gw214790@LANCE.ColoState.Edu (Galen Watts)
Subject: Re: RF transmitters, cellular phones
Date: Sun, 27 Dec 1992 16:01:31 GMT
Organization: Colorado (no, we don't all support bigotry)

In article <1hi6jsINN3bb@leela.CS.ORST.EDU> forbesm@atlantis.CS.ORST.EDU (Mark Forbes) writes:
>alex@anat3d1.anatomy.upenn.edu (Alex Shrom) writes:
>[stuff deleted]
>Customer can't afford a good phone, but really needs the service. In our
>area, log truck drivers are in this category. They are required by law
>to have communication systems handy (for forest fire and OSHA purposes) 

Does CB or Amateur radio satisfy the legal requirements?  If they don't,
it sounds like a law designed to make even more money for the already
overpriced cellular industry.
>
>He gets what he needs, a yuppie gets lunch money, and Cellular One gets
>another customer. Slick.

I can call 911 from any repeater in this area for FREE!

Just my 15 Roubles (=$0.02) worth.
Galen Watts, KF0YJ

Newsgroups: sci.electronics
From: b259phl@utarlg.uta.edu (PHILIP LIPPEL)
Subject: Re: need some basic help with DIODES
News-Software: VAX/VMS VNEWS 1.41    
Organization: The University of Texas at Arlington
Date: Thu, 31 Dec 1992 01:16:00 GMT

In article <1ht4krINN9kb@post.its.mcw.edu>, kcb@post.its.mcw.edu (Kent C. Brodie) writes...
> 
>A simple question.    Which way does the "band" on a diode go?  +/-?
> 
>-- 
>--------------
>Kent C. Brodie - Sr. Systems/Network Manager		brodie@post.its.mcw.edu
>Information Technology Systems
>Medical College of Wisconsin				(414) 257-8769
Think of it as a minus sign.
From: christos@kuhub.cc.ukans.edu
Newsgroups: sci.electronics
Subject: 4x Oversampling Compact Disc Specs........
Date: 24 Dec 92 22:15:06 CST
Organization: University of Kansas Academic Computing Services

Hello there,

	I have a question on compact disc specs. Does the 8x oversampling mean
8x8000 samples per second?

Thnaks,
Internet address:
cneophytou@tesla.ece.ukans.edu
Newsgroups: sci.electronics