HDTenEightyP/NetNews huggingface dataset:
From: ems@michael.apple.com (E. Michael Smith)
Newsgroups: sci.electronics,sci.energy,rec.autos
Subject: Re: Flyin' Flywheels
Date: 28 Dec 92 21:12:49 GMT
Organization: Circle 'C' Shellfish Ranch, Shores-of-the-Pacific, California

In article <1992Dec26.083859.15101@klic.rain.com> keithl@klic.rain.com (Keith Lofstrom) writes:

>I saw one article about some Navy experiments, dropping some 2 meter
>metal rods from airplanes into China Lake.  They penetrated 40 feet.

And don't forget the bombs we dropped in Iraq on the 'bomb proof'
shelters...  They were kinetic penetrators (something like 100+ feet
of dirt, PLUS the concrete bomb shield, PLUS the concrete bunker walls...

This were 'only' doing about Mach 1 or 2 on impact ...  It was only after all
the penetration that they set off their explosives ...

>Lastly, consider the humble hypervelocity depleted uranium antitank
>shell.  Blows right inside Mr. Tank, and fills the inside of the tank
>with flaming liquid uranium drops.   As well as fragments of the inside
>wall of the tank - this is called "spalling".  The antitank shell 
>does not penetrate 99.9% of the tank.  

There are also anti-tank weapons that use 'fluff' ... they set of
a shaped charge of explosive and let the plasma jet cut a hole inside...

Nothing but hot gas ... lighter than 'fluff' ...

(The rest of a very good posting deleted.) 

>Well, guys'n'gals, thanks for the fun.  Engineering is the process of
>tearing things apart in our minds.  Those things we can't tear apart
>in our minds we have to go ahead and build.  Too much work.  Flywheel
>powered cars are so beguiling that it takes a good bit of effort to tear
>the concept apart, but it can be done.  If you feel more like defending
>ideas than trashing them, you have the wrong temperment for engineering.
>Try management or sales.

Now here we part company.  Engineering is the art of compromise.  It is
the art of finding how to construct something useful from the  available
materials (and laws of science).  Management is the art trashing things!!
And don't you forget it ;-)  Managers are always looking for perfectly
good engineering projects to tear appart and distroy (usually just to
save a few bucks and best done just before the project is about to 
ship! ;-)

-- 

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.
From: bhiller@bigwpi.WPI.EDU (Brent Hiller)
Newsgroups: sci.electronics
Subject: Part Def. 68705K1
Date: 7 Jan 1993 06:48:18 GMT
Organization: Worcester Polytechnic Institute
NNTP-Posting-Host: bigwpi.wpi.edu

   I'm looking for a PADS Part Definition for the Motorola 68HC705K1
8 bit Micro-Controller. I tried entering one myself but I keep loosing
2 pins. Any information would be appreciated.

Brent

bhiller@wpi.wpi.edu
Newsgroups: sci.electronics,rec.games.programmer
From: cthomas@athena.mit.edu (Michael T Ford)
Subject: Re: Sort of a Joke - sad though...
Organization: Massachusetts Institute of Technology
Distribution: na
Date: Sat, 9 Jan 1993 05:54:11 GMT

In article <C0IEow.326@bcstec.ca.boeing.com> mce5921@bcstec.ca.boeing.com (Martin Emde) writes:
>In article <1if757INNjlf@transfer.stratus.com> det@phlan.sw.stratus.com (David Toland) writes:
>>In article <1if650INNt9a@hp-col.col.hp.com> cab@col.hp.com (Chris Best) writes:
>>[someone else writes, no attribution given]:
>>By the way, the gun (which reads the "flying spot" of the video trace
>>from the screen), should work adequately with projection TV, so that is
>>*not* the problem.
>>
>Can anyone out there be more specific as to how those games work
>that sense screen position?  How does it compensate for different
>sized images and varying distances from the TV?

When you pull the trigger on the "gun", notice that the screen briefly
goes completely black except for a white spot.  Then in the gun there
is a lense and a photodetector.  The photodetector gets the white spot
(assuming you aimed correctly) and then the screen goes back to the normal.
Then the duck, or whatever, falls out of the sky.

Mike




From: rplourde@leotech.mv.com (Richard Plourde)
Sender: uucp@leotech.mv.com
Newsgroups: sci.electronics
Subject: PC board etching question
Date: Mon, 04 Jan 1993 23:06:00

Reply to Rich Gopstein regarding PC board etching question

RG>From: gopstein@helix.bms.com (Rich Gopstein)
RG>Organization: Bristol-Myers Squibb PRI
RG>

RG>1) Can I realistically make double sided PC boards?  My first board
wi
RG>   single-sided, but I would like to try more complicated boards
later
RG>

Remember, you do not have plated-through holes.  All components will
have
to be soldered on both sides, while vias will need to be connected
through
with a scrap piece of wire.  It's all a nuisance, but it does work.

Richard Plourde - Nashua NH
rplourde@leotech.mv.com



 * Origin: Leo Technology (603)432-2517/432-0922 (HST/V32)
(1:132/189)
Newsgroups: sci.electronics
From: cthomas@athena.mit.edu (Michael T Ford)
Subject: Re: Video Signals
Organization: Massachusetts Institute of Technology
Date: Thu, 7 Jan 1993 22:12:54 GMT


From my work with descramblers and video, I can tell you that
inverting (moving it 180degrees) should work in fixing the color.

I assume that you have all of the syncs in sync.  That is a usual
problem in descrambling.

73, 
Mike WZ0C
From: flux@sys6626.bison.mb.ca (John Kamchen)
Newsgroups: sci.electronics
Subject: pixel clock
Date: Sun, 10 Jan 93 17:53:27 CST
Organization: System 6626 BBS, Winnipeg Manitoba Canada

I asked this question a while ago, but I kinda garbled up the meaning.
I am looking for a circuit that can provide me with a 14.318318Mhz
pixel clock, derived from an incomming video source.
I'm using an LM1881 video sync separator to obtain the needed sync 
signals.  I've tried various circuits, and they all start stable after 
the Hsync, but by the time the video line ends, the clock is jittering
way to much to be of any use.
Is this possible? Are there examples of this in some Radio Electronics
issue ? I have access to those.
Thank you in advance.
-John
SSE BBS (204)589-1078 v32bis AmiTronics- MEGS of 'em
Newsgroups: sci.electronics
From: schuch@phx.mcd.mot.com (John Schuch)
Subject: Re: NEED SOLENOID ACTUATED WATER VALVE.....
Organization: Motorola Computer Group, Tempe, Az.
Date: Fri, 8 Jan 1993 13:08:05 GMT

In article <1993Jan6.230313.1091@cmkrnl.com> jeh@cmkrnl.com writes:
>In article <C0Eoqw.5Dq@techbook.com>, philb@techbook.com (Phil Biehl) writes:
>> Hi. In examining my hydronic (hot water basboard) furnace, I find that
>> it is divided up into three zones. What I'd like to do is put in
>> electrically operated valves that controlled via a microcontroller and
>
>I don't know about the "7/8 copper piping" part, but one good source for 
>solenoid-operated valves is your local home improvement store, in the 
>plumbing department.  They're sold for timer-operated lawn sprinkler systems.
>The coils are either 12 or 24 V AC -- I forget which.  They would probably 
>work on DC as well. 
>

I'd be VERY carefull trying to use plastic sprinkler valves in a hydronic
system. Sprinkler valves are designed for high pressure - low temperature.
Hydronic valves are designed for low pressure - high temperature. It might
work fine but I wouldn't want to leave the house the first several days
the valve is in use.

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: pophal@nicmad.uucp (Gerald Pophal x2091)
Subject: Re: Mac+ compatible data acquisition modules--any suggestions?
Organization: Nicolet Instrument Corp.
Date: Sun, 10 Jan 1993 16:39:27 GMT

In article <86369@ut-emx.uucp> rcamama@ccwf.cc.utexas.edu (Robert Camama) writes:
>I've been wondering...I have been looking for a Mac+-compatible data 
>acquisition module.  The only one I know of is the Common Sense CNX four-input
>data acquisition module, running for $349 at Radiant Enterprises of San Fran-
>cisco, CA.  Does anyone know 
> 
>        1)  Of a data acquisition module such as the CNX, but at a lower 
>                price?
>        2)  Of a data acquisition module with TWO data inputs (I'm on a tight
>                budget, and I might go for a two input design if available)?

 
 In the curent Radio Shack catalog there is a DMM with RS-232 output.
I have one similar to this and have had it working with a mac by wiring the
cable differently. You would need two of these for two channels. This
would use up both serial ports on the mac. The DMM I have is 4.5 digits
and cost about $110.
 
 Mine came with software for an ibm pc clone. You can aquire data with a
communications program or write your own.
From: wellison@kuhub.cc.ukans.edu
Newsgroups: sci.electronics
Subject: Re: Laser gunsights
Date: 9 Jan 93 12:21:33 CST
Organization: University of Kansas Academic Computing Services

With all of this laser targeting systems discussion, I thought I would put my
two cents worth in. Laser targeting systems were developed by the military for
two things. One, for simulated battle situations where a kill was detected by
your opponet's detector and visa versa. The lasers used were and are IR diode
lasers (I.E. invisible). Second, they were used for actual combat to target an
object, like a tank, with a laser source for guidence on laser guided missiles.
The common type that we as civilians see are a product of the visible laser
diode who was introduced on the commercial market in mid 1989. These are
identical to the laser diodes used in laser pointers. The idea is for better
sighting and target hitting as well as for intimidation. Some guy has a police
.38 cal pistol pointed at him and a red dot on his forehead, he will think
twice about doing something stupid. As with ANY laser light source, the power
is concentrated into a very tigh beam. The intensity is thousands of times
brighter than ambient light and therefore, the possibiliy for eye injury is
there. The commercial target lasers are between 3mW and 5mW at 670Nm. The light
percieved by the eye is about 1mW at 5mW, but the diode lasers have strong
harmonics in the near IR band, which is 780Nm to 840Nm and that you can't see.
So the danger exist for eye damage even though you can't see it. These lasers
are rated Class IIIa, which the CDRH (Center for Devcies and Radiological
Health) has determined could cause perment eye damage if viewed directly. But
the best rule to follow is: NEVER VEIW ANY LASER BEAM DIRECTLY NO MATTER WHAT
IT"S POWER ! ! !. If you have a target laser, DO NOT point it into a person's
eyes unless of course in 3 seconds, he won't need them any more ;-) Lasers are
fun things to play with (I have been playing with them for 24 years), but above
all, use common sense as they are not harmless toys and can cause severe injury
if used carelessly.

-=-= Wes =-=-
Newsgroups: sci.electronics
From: ron@vicorp.com (Ron Peterson)
Subject: How to convert RS-170A RGB to NTSC cheaply?
Organization: V. I. Corporation, Northampton, Massachusetts
Distribution: na
Date: Fri, 8 Jan 1993 19:44:12 GMT

Is there a cheap way to convert RS-170A RGB&Sync to NTSC?  I seem
to remember an article in Radio Electronics but can't find it.
Would it be as simple as using a high speed op amp to sum them?
ron@vicorp.com or uunet!vicorp!ron
From: wlp@hpfcso.FC.HP.COM (Bill Pherigo)
Date: Tue, 5 Jan 1993 19:35:30 GMT
Subject: Thermostat wiring question
Organization: Hewlett-Packard, Fort Collins, CO, USA
Newsgroups: sci.electronics

    I'm trying to hack the interface to my furnace to allow it to be controlled
by my PC.  My thermostat, A Chronotherm III, has 5 wires going to it.  I was
able to to deduce from looking at the schematic for the furnace that one wire
is a common, one is to turn on the Fan, and a third is either to turn on the
flame, or to turn on both the flame and the fan (not sure).  The A/C was added
to the furnace as an option, and I can't locate a schematic for it.  I would
expect there to be a single wire to turn on the A/C compressor.  This leaves
that 5th wire that I can't figure out.  I would think that this is a standard
interface that someone in net land could tell me about.  Any help?

Bill Pherigo
From: ballen@convex.csd.uwm.edu (Bruce Allen)
Newsgroups: sci.electronics
Subject: piezo crystal accelerometers
Date: 7 Jan 1993 05:04:52 GMT
Organization: Computing Services Division, University of Wisconsin - Milwaukee
NNTP-Posting-Host: 129.89.7.30

Could someone guide me to information about accelerometers
that use piezo elements as the transducers?  I am interested in
(1)  manufacturers phone #'s
(2)  book/journal references (I have a good University library handy)
(3)  articles/schematics in trade mags
Please reply directly to ballen@dirac.phys.uwm.edu
(IP # is 129.89.57.19)

Thanks,
	Bruce Allen
	Physics Department
From: Andrew.Stratton@cm.cf.ac.uk (Andrew F Stratton)
Newsgroups: sci.electronics
Subject: HELP - Composite Video to RGB conversion.
Date: 5 Jan 93 15:45:45 GMT
Organization: University of Wales College of Cardiff


I desparately need some help - converting the Composite Video output
from a VCR to an IBM PC svga Monitor.

I already have a Sync separator circuit diagram (for HSync and Vsync),
so I don't need them to be part of the circuit (though I don't mind if
they are).  I also have the audio separately - and will play it through
my HiFi.

I gather that the svga monitor is 5volt - but I can easily convert 12v
to 5v - if that is what comes out.

I have heard that there is an IC available that does the whole thing (or
thereabouts) - does anyway know of it?

Please send me any details you have - especially references, or GIFS.  I
would also be interested in commercial products that are of a cheap
price (i.e. under 60 pounds).

Thanks in advance,
  Andy Stratton.
Newsgroups: sci.electronics
From: ctdonath@mothra.syr.EDU (Carl T. Donath)
Subject: Re: PIXAR
In-reply-to: s3176997@techst02.technion.ac.il's message of Tue, 5 Jan 1993 22:57:11 GMT
Organization: Syracuse University
Date: Wed, 6 Jan 93 12:22:34 EST

In article <1993Jan5.225711.28626@discus.technion.ac.il> s3176997@techst02.technion.ac.il (Daphne Rosenhouse) writes:

   hi all
   i heard alot about PIXAR
   i have no idea what it is !
   can anyone explain please ?
   thx

PIXAR is a high-end graphics animation company, providing products (the 
RenderMan photorealism 3-D package; high-end graphics computers) and 
movies/movie_services (the academy award-winning "Tin Toy" animated short;
"Luxo Jr.", "Red's Dream"; ads; graphics for feature films).

BTW: does anyone know who developed the "morphing" techniques? Was it PIXAR?

--
  __________/ ctdonath@rodan.acs.syr.edu  Carl T Donath \________________
 / Why do people assume that this is the first time things have ever     \
/ been this way and things will stay this way forever?                    \
Organization: Queen's University at Kingston
Date: Sat, 9 Jan 1993 17:54:52 EST
From: <LEEK@QUCDN.QueensU.CA>
Newsgroups: sci.electronics
Subject: Pin out of 41464 (64K*4) surface mount chip ?

I was hacking around with the power supply of my hard drive and managed
to blew 2  64K*4 120ns surface mount DRAM chips on the logic board
(that's the damage I know so far.)  Does any one there know where I can
get a couple of the surface mount version ?  Can someone email me a pin
out for the DRAM (41464)  I'll probably use the dip version that I have
here if I can't  locate the surface mount version.

Please response by email.  Thanks in advance.

K. C. Lee
Elec. Eng. Grad. Student
Newsgroups: sci.electronics
From: timd@fenian.dell.com (Tim Deagan)
Subject: BBS or FTP for Siemens
Reply-To: timd@fenian.dell.com
Organization: SLAMDANZ CYBRNETX
Date: Thu, 7 Jan 1993 22:33:57 GMT

I am looking for dloadable stuff for the Siemens 80535
(a superset of the 8051).  I would love to find the ASM51
include file which contains all the additional SFRs.

I'm also interested in sites with 8051 code.

AtDhVaAnNkCsE

--Tim
---
timd@fenian.dell.com-My employer is_not responsible for_this.
    / / | |     /  || \  / |  __  |  _ \  /  || \ | ||__ /
 ***\ \*| |___*/ /_||  \/  |*|__|*| |_) )/ /_|| |\| |*/ /_***
    /_/ |____//_/|_||_|\/|_|      |____//_/|_||_| \_|/____|

Newsgroups: sci.electronics
From: wrb@cbnews.cb.att.com (wallace.r.blackburn)
Subject: Re: Magnetic Sensor?, hall effect, reed switches, etc
Organization: AT&T
Distribution: usa
Date: Tue, 5 Jan 1993 16:38:11 GMT

In article <103678@netnews.upenn.edu> george@mech.seas.upenn.edu writes:
>
>:Good magnetic sensors in disk drives , brushless DC motors or Car 
>:ignitions use Hall Effect sensors that provide a solid state or linear 
>
>:
>:Cheaper sensors use magnetic switches when the contact frequency is low. 
>:REED RELAYS are such a device.
>:
>
>my latest project needs a magnetic sensor to operate over a range 
>from 0 to 100Hz.  I think this is at best pushing the limit
>of what i can do with a reed switch.  How can i find out
>out more about hall effect devices?  A small quantity supplier,
>with data sheets would be nice..
>--
>  /   george jefferson
>\/ *  george@mech.seas.upenn.edu

The latest issue (Feb '93) of ComputerCraft has an article titled "Using
Rotary Encoders" that has some good info on Hall-effect sensors.  All
Electronics has 3 of them listed in their Spring/Summer 1992 catalog.
They're probably still in their latest one.  Number is 1-800-826-5432.

They show a Microswitch #SS41 that operates at up to 100 kHz.  Their cat. #
is HESW-2 and they're 75 cents or 10 for $6.50.  It is in a TO-92 package.


			Wally Blackburn AA8DX
Newsgroups: sci.electronics
From: wtm@uhura.neoucom.edu (Bill Mayhew)
Subject: Re: 110/220 V AC why ?
Organization: Northeastern Ohio Universities College of Medicine
Date: Tue, 05 Jan 1993 13:45:51 GMT

The choice of 117 VAC RMS nominal in the US is more of a political
choice than a choice of technical merit.  In the early days of
development of power distribution in the US, there was bitter
rivalry between Edison, a proponent of of DC generation and
distribution, and Westinghouse, an AC generation proponent.  Edison's
company spread fear stories about the supposed inherent danger of
AC current versus DC.

Of course, it makes sense to keep the voltage in the distribution
system at as high a potential as possible to reduce energy losses
to resistive heating in the wire.  Note that out-of-phase current
may deliver no power to the load, but does cause heating loss in
the wire carring the current. Energy loss is greater for low
voltage distribution systems.

Re: the previous posting:  a lower AWG number on wire denotes a
larger corss sectional area.


-- 
Bill Mayhew      NEOUCOM Computer Services Department
Rootstown, OH  44272-9995  USA    phone: 216-325-2511
wtm@uhura.neoucom.edu (140.220.1.1)    146.580: N8WED
Newsgroups: sci.electronics
From: pcw@flutter.tv.tek.com (Patrick C. Wilkins)
Subject: Re: STK-3076
Organization: Tektronix TV Products
Date: 8 Jan 93 11:02:12

Griff, the phone number i have for Yamaha parts is 714-994-3312 and 
the customer service number being 522-9105. I think these are still valid
numbers and they will sell to the general public.

--

-------------------------------------------------------------------
    Pat Wilkins II
    A.K.A. Clif
    Email pcw@flutter.tv.tek.com
    Work 503-627-6525

-------------------------------------------------------------------
    Is Deja-vu real or is life just redundant???????
-------------------------------------------------------------------
From: FG
Subject: Re: >= 5W AM-band amp design?
Organization: Digital Equipment Corporation
Date: Tue, 12 Jan 1993 02:57:05 GMT


In article <1993Jan10.063305.887@athena.mit.edu>, cthomas@athena.mit.edu (Michael T Ford) writes...
>In article <1993Jan10.005856.26077@sol.ctr.columbia.edu> svaldez@ocf.berkeley.edu (Steve Valdez) writes:
>>   CVan someone point me to a source for a circuit design which
>>   can take the 100mw output from my Panaxis AM transmitter (at 1500kHz)
>>   and amplify it to somewhere between 5W and 20 or 30W?  
>>   How does one create an amp in parallel to provide greater gain?
>>   svaldez@sdcc13.ucsd.edu
>>   svaldez@ocf.berkeley.edu
> 
>Hint #1:  Don't do it unless you are supposed to.  It sounds to me like
>recreation and not research.  If you do do it, don't get caught.
>I think that you are already running at right about the max. the FCC
>will let you.
> 
>Mike WZ0C

	But then this is Alt.radio.PIRATE so it's safe to assume we knew 
	that!!
From: ehrlich@world.std.com (Stuart R Ehrlich)
Subject: Want to build modem carrier detect circuit.
Organization: The World Public Access UNIX, Brookline, MA
Distribution: usa
Date: Mon, 4 Jan 1993 13:36:03 GMT

I want to build a 'carrier detect' circuit to go on my phone line.  I
have several computer systems and several modems, but all on the same
line, so only 1 is in use at any time (1 at the most).  The modems are
1200/2400 baud.  I would like to have a single indicator that would
indicate the presence of a carrier on the phone line.  I _DON'T_ want a
'phone line in use' indicator; I already have one.  I want a new
indicator for when a modem is active.  Can I use a portion of some modem 
IC, just to use it as a carrier detector?  I would appreciate any tips or 
schematics.  Thanks!
From: rja@newbirth.Eng.Sun.COM (Robert Allen)
Newsgroups: sci.electronics
Subject: Re: Battery Gell cell or Lead
Date: 7 Jan 93 17:00:51 GMT
Organization: Sun
NNTP-Posting-Host: newbirth

In article <388.442.uupcb@ozonehole.new-orleans.la.us> gerald.belton@ozonehole.new-orleans.la.us (Gerald Belton)  writes:
>>I am in the process of making a rechargeable bicycle light and wanted to kno
>>which type of battery would be better Gell Cell or a Lead Acid. What are the
>>pros and cons of each? I have heard that it's not a good idea to fully
>>discharge a Lead Acid is this true?  Also how would the cold effect each of
>>these types of batteries?
>
>They are essentially the same, except that a gell cell has the
>electrolyte in a, well, "gelled" form instead of liquid.
>
>You definitely do NOT want to be carrying a liquid-electrolyte lead-acid
>battery around on a bicycle.  If you fall, you will have enough to worry
>about without getting battery acid on yourself and your bike.

    I mildly disagree.  I know a number of bicyling hams who
    carry gelcells to power their HTs.  I use gelcells at home
    to power my shortwave radio and scanners.  In all cases
    newer "gelcells" of the absorbed electrolyte type are used.
    It is my understanding that, unless these things are outright
    crushed, leakage should be minimal.
--
Robert Allen, rja@sun.com		DISCLAIMER: I said it, not my company.
		    Samuel Addams: Brewer, Patriot.															        "The right to brew beer is the right to be free!" - me
Newsgroups: sci.electronics
From: daylmer@nyx.cs.du.edu (David Aylmer)
Subject: What are differences in Pspice versions?
Organization: Nyx, Public Access Unix @ U. of Denver Math/CS dept.
Distribution: usa
Date: Fri, 8 Jan 93 07:18:09 GMT


What are the basic differences between the different versions
of Pspice?

Also, I've heard that the programs don't come with documentation.
If this is true, where do I find the docs?