HDTenEightyP/NetNews huggingface dataset:
From: Ted_Eugene_Viens@cup.portal.com
Newsgroups: sci.electronics,sci.energy,rec.autos.tech
Subject: Re: Flywheel batteries as EV power source
Date: Tue, 22 Dec 92 01:28:51 PST
Organization: The Portal System (TM)
  <1992Dec15.004956.465@mtu.edu> <1h5afbINN1hs@access.usask.ca>
  <51690@seismo.CSS.GOV>

>In article <1h5afbINN1hs@access.usask.ca>, choy@skorpio.usask.ca (I am a termi
n
>ator.) writes:
>> In article <1gqhdqINNjot@gap.caltech.edu>, carl@SOL1.GPS.CALTECH.EDU (Carl J
>Lydick) writes:
>> |> In article <1992Dec17.170002.28389@u.washington.edu>, basiji@stein.u.wash
i
>ngton.edu (David Basiji) writes:
>>
>> |>  Perhaps you'd care to review the title of the
>
>> A flywheel that has the power to run a car at highway speeds (I read in the
>> paper that 8 hp can maintain the speed on average) can be compared to giving
>
>8 hp seems way low.  That can't be highway speed, I know of no practical
>car design that would experience only 8hp of road friction and air resistance
>at 55 mph.  But in addition, let's not forget:  hills, curves, rough roads,
   So much deleted above it should make you sick...
>--
>Richard Stead
>Center for Seismic Studies
>Arlington, VA
>stead@seismo.css.gov
>
If memory serves me right, Porsche technical literature  will show that in real
life conditions on a flat road in still weather the 911 series cars require
5 horsepower to maintain 55 miles per hour.  I would love to hear from some
Porsche engineers if I am incorrect.
Bye...  Ted..
Newsgroups: sci.electronics
From: phr@telebit.com (Paul Rubin)
Subject: Re: Soundblaster for low rent data acquisition?
Organization: Telebit Corporation; Sunnyvale, CA, USA
	<1992Dec24.003147.14369@osuunx.ucc.okstate.edu>
Date: 23 Dec 92 18:22:52

    Sound Blaster works great you to 44 kHz single channel and 22 Khz 
    dual channel. Their software is easy to use and the file format is
    easy to figure out. I have some source code at work if any one is
    interested.
    Gordon
    Gordon Couger
    AB5Dg   Agriculture Engineering Oklahoma State University

Yes.  Thanks.  What I'm concerned about is how well it works at very
*low* frequencies, not high frequencies.  Specifically, do you know if
the analog input is AC coupled to the A/D converter?  I want to
measure what amounts to DC voltages.  If the Soundblaster's freq.
range is 20 Hz to 20 Khz or anything like that, I can't use it---I
need it to go down to zero Hz.
Newsgroups: sci.electronics
From: paul@grafted.UUCP (james caldwell)
Subject: Re: Ni-Cd storage state question.
Organization: GRAFTED, Central Indiana's Usenet BBS 317-881-4369
Date: Sat, 19 Dec 92 00:05:01 CST

limrcd@hpsgm2.sgp.hp.com (Richard LIM) writes:

> I curious to know how should one store used Ni-Cd rechargeable 
> batteries. Should they be stored CHARGED or fully DISCHARGED?
> And Why?
Store nicads charges or they will die. Also fully discharge them
before charging. I don'y have a reason but this works for us.
If these ni-cads are separate cells there was a nicad zapper
in radio electronics you could build. I've fixed some single
cell by applying 12vdc for 1sec but this could injure you!.
                                Paul

--
james caldwell
The Grafted Branch BBS
317-881-4369
internet: paul@grafted.UUCP
uucp: ..!uunet!grafted.UUCP!paul
 = = Grafted Branch BBS (317) 889-6997 2 Gig on-line = =
Newsgroups: sci.electronics
From: bror@uther.calvin.edu (Randall Brouwer)
Subject: PADS-LOG question
Summary: modify sheet border
Keywords: sheet border frame
Organization: Calvin College
Date: Wed, 30 Dec 1992 17:42:26 GMT

For the PADS-LOGIC experts out there:

   What (if any) procedures are there for modifying the frame/border that
is automatically provided as you begin each sheet?  Are there certain files
that are read at startup that can be modified?

   Thanks for your help!  (replies by email are welcome and if enough 
interest, I can post a summary)


Randy Brouwer			bror@uther.calvin.edu

Newsgroups: sci.electronics
From: schriste@uceng.uc.edu (Steven Christensen)
Subject: Re: Problem with 68hc705 eval. kit
Organization: University of Cincinnati
Date: Sat, 2 Jan 1993 03:18:35 GMT

Believe it or not, the 'HC705K1 is _very_ sensitive to ambient light.
Put a piece of opaque tape over the window of the erased part, and
it will blank check correctly.

I was incredibly surprised when the Motorola FE's told me that was
the problem with my board.  You never know...


		Steven

-- 
Steven V. Christensen
schriste@uceng.uc.edu
Newsgroups: sci.electronics
From: schuch@phx.mcd.mot.com (John Schuch)
Subject: Re: How would you detect lack of a square wave?
Organization: Motorola Computer Group, Tempe, Az.
Date: Sun, 3 Jan 1993 22:57:17 GMT

In article <1993Jan2.172332.21070@socrates.umd.edu> jimbo@socrates.umd.edu (Jim Bogard) writes:
>What's the best way to detect the presence/lack of a square wave?

Go to RadioShack and pickup their little 555 timer cookbook. There is
an example missing pulse detector circuit. In essense, the square wave
continuously resets the timer before it has time to trigger. If the
pulse train stopps, the timer times out and trips.

John


+--------------------------------------------------------------------------+
| John R. Schuch  -  Motorola Computer Group  -  Manufacturing Engineering |
| N7XVS - schuch@phx.mcd.mot.com - (602) 438-3008 - CompuServe: 70733.3330 |
+--------------------------------------------------------------------------+

-- 
+--------------------------------------------------------------------------+
| John R. Schuch  -  Motorola Computer Group  -  Manufacturing Engineering |
| N7XVS - schuch@phx.mcd.mot.com - (602) 438-3008 - CompuServe: 70733.3330 |
+--------------------------------------------------------------------------+
Newsgroups: sci.electronics
Subject: Electronics Design Question
From: djmst19+@pitt.edu (David J Madura)
Date: 30 Dec 92 22:25:08 GMT
Organization: University of Pittsburgh
Originator: djmst19@unixd3.cis.pitt.edu

Well I've scanned my .newsrc for an appropriate group to place this
question and I came up with this one, if it belongs somewhere else
please let me know.

I have a circuit design that I need integrated down to 1 or 2 chips
using FPGA,PLD's or what have you.  I don't know much about custom
or semi-custom chips to know what would be the most cost-effective.

The circuit is input a 24-bit address and must compare it against
4 loadable 24-bit address and raise or lower one of four corresponding
chip select lines.  It must do this withing 35 ns at least.

So the chip must have at least 24 input lines and 4*24=96 flip-flops
.  I can't do this with discrete components and must have it in one
chip because of size considerations.

My question is what would be the most cost-effective way of realizing
this?
From: adrian@cs.hw.ac.uk (Adrian Hurt)
Newsgroups: sci.electronics
Subject: Re: Best nicads??
Date: 21 Dec 92 15:58:12 GMT
Organization: Dept of Computing & Electrical Engineering, Heriot-Watt University, Scotland

In article <1992Dec15.161824.7507@cc.gatech.edu> byron@cc.gatech.edu (Byron A Jeff) writes:
>
>I don't think that's the version referred to. RS has a line of high capacity
>NiCads (from memory of the 1993 catalog):
>
>Size:     Amp Hours
>-----     ---------
>D         4.3
>C         2.0
>AA        1.6 (I think) 

For what it's worth, here are the capacities of Ever Ready NiCad batteries in
my Oct 1992 - Mar 1993 Farnell catalogue (Farnell being a mail order firm, not
a producer):

Size	Amp Hours
----	---------
AAA	0.18
N	0.15
AA	0.50
C	2.20
D	4.00
PP3	0.11
PP9	1.20

RS, which in this country stands for Radio Spares, sell special high capacity
batteries made by Varta.  Most are odd sizes, but there is an AA battery with
a figure of 0.70 Ah.  Note that unlike what some people have claimed, those
PP3 and PP9 batteries put out 8.4V, not just 7.2V.

If that figure of 1.6 Ah for an AA battery is correct, I want an address so I
can order some!

As for the person who wanted to detect how full a battery is by the voltage it
produces, the Farnell catalogue has a graph showing capacity versus voltage.
The graph starts out at 1.4V, drops sharply to about 1.25V at 10% discharge,
stays fairly flat with a slight downward slope to about 1.2V at 75% discharge,
and then drops more sharply again.  In fact, there are three curves shown, for
different currents - using a higher current results in a slightly lower
capacity.  All three curves are the same shape, though - sharp drop, very
flat for most of the battery's discharge time, then another sharpish drop at
the end.  So you should be able to tell when a battery is really freshly
charged, and when it is really low, but you will have a hard time telling
whether it is 30% discharged or 60% discharged.

-- 
 "Keyboard?  How quaint!" - M. Scott

 Adrian Hurt			     |	JANET:  adrian@uk.ac.hw.cee
 UUCP: ..!uknet!cee.hw.ac.uk!adrian  |  ARPA:  adrian@cee.hw.ac.uk
Xref: sparky sci.electronics:21401 sci.energy:6365 rec.autos:30337
From: king@reasoning.com (Dick King)
Newsgroups: sci.electronics,sci.energy,rec.autos
Subject: Re: Flywheel batteries as EV power source
Date: 22 Dec 92 19:27:34 GMT
Organization: Reasoning Systems, Inc., Palo Alto, CA

In article <78564@ncratl.AtlantaGA.NCR.COM> mwilson@ncratl.AtlantaGA.NCR.COM (Mark Wilson) writes:
>In <1992Dec21.193621.12001@microware.com> troyf@microware.com (Troy Frericks) writes:
>
>|>If I were a terrorist, I would drool at the thought of being able to
>|>get such wonderful bombs so easily... All you'd have to do is arrange
>|>for the vacuum valve to be opened on command or the magnetic bearing
>|>to be turned off, etc.
>|>
>|>BOOM!
>
>|Modern composit materials, when used in a flywheel, will disintegrate
>|with such a failuar.  This bomb would be about as wonderful as some
>|fiber-glass insulation falling out of your attic.
>
>You haven't been listening have you?
>It doesn't matter what form the flywheel takes after disintegration.
>It could even turn into a gas or sub-atomic particles.  What causes the
>BOOM is all of that kinetic energy being turned into heat.
>
>-- 

If the flywheel were made out of neutrinos then if it disintegrated the
neutrinos would fly through the housing, the driver, the bystanders, and light
years of lead with negligible interaction.  

Of course, the car would have to be equipped with a neutrino detector to tell
the driver that his flywheel had disintegrated, especially if there are 20 of
'em, and that he has to go to a service station.

Neutrino dectors weigh hundreds of tons and involve toxic substances like
carbon tetrachloride.  There's also the problem that YOUR neutrino detector
would blip if either the sun went supernova or some OTHER driver's flywheel
blew.

Oh, well, back to the drawing board. 

 ;-) ;-) ;-) ;-)

-dk
From: yuanj@ucbeh.san.uc.edu
Newsgroups: sci.electronics
Subject: Re: Digital tuning
Date: 27 Dec 92 10:54:19 EST
Distribution: world
Organization: Univ. of Cincinnati

In article <7480157@hpfcso.FC.HP.COM>, myers@hpfcso.FC.HP.COM (Bob Myers) writes:
>>  I have a sony walkman with digital tuning. The tuning step is
>> 10Khz for AM band. I want to take this to India where stations are at 9KHz
>> steps. So in India I will be able to catch very few stations with
>> this walkman. Can anybody suggest any method of changing
>> the step frequency ? ( Some walkmans come with option, but
>> mine does not ). Can I tap the line somewhere and introduce
>> another synthesiser etc ?
> 
> I just bought a Sony w/digital tuning (unfortunately, I don't know the model
> number), but I know that it has a switch to change the AM tuning step.
> In mine, it's inside the cassette compartment, and hard to see unless you're
> looking for it.  You might want to check your owner's manual, or just look
> around the unit *really* well.
> 
> If there's no switch, there probably IS a jumper or some such inside - Sony
> sells these things worldwide, and it'd be silly to have more than one basic
> design for similar models.  Perhaps someone knows the innards well enough
> to point the location of said jumper out?
 
I have a Sony world band radio and a Toshiba walkman (both digital tuning) and
they all have a little switch that allow user to choose between 9 and 10 kHz
step.  Yours has got to have a switch.

BTW, I think my Sony manual says that the American stations are 9 kHz apart
while the rest of the world uses mostly 10 kHz.  Am I wrong?

Cheers!

J.Y.
Xref: sparky sci.electronics:21658 sci.energy:6478 rec.autos:30626
From: stead@skadi.CSS.GOV (Richard Stead)
Newsgroups: sci.electronics,sci.energy,rec.autos
Subject: Re: Flywheel batteries as EV power source
Date: 28 Dec 92 23:44:39 GMT
Followup-To: sci.energy

In article <1992Dec23.214002.8965@enterprise.rdd.lmsc.lockheed.com>,  writes:
> In article <1992Dec23.081836.4720@adobe.com>, pngai@adobe.com (Phil Ngai) writes:
> > this: suppose I have a torch fueled by 10 gallons of gasoline. Do you
> > believe I could vaporize your "carbon carbon" fly wheel? How would
> > you compare that to the energy required to merely shred the material?
> 
> Nope, I don't believe you could vaporize a carbon carbon fly wheel with 10 
> pounds of gasoline (thats why we need to get heat of vaporization numbers).

He said 10 gallons.  But let's take that 10 pounds - that's 115,000 kCal.
Now let's take the heat of vaporization of carbon at 25 degrees - 14 kCal/g.
Thus, 115,000 kCal will vaporize 8 kg of carbon.  The 10 gallons would
vaporize 64 kg of carbon.  This is complete vaporization in the absence of
oxygen.  How big a flywheel were you considering?

> I do belive that you could burn the flywheel on fire with the torch, but
> that's not going to happen in a vacuum (or was that what you ment by 
> "vaporization").

Given the situation, the vacuum would be breached in short order, and the carbon
oxidized, contributing a small amount of energy to the explosion.

> however for any english majors out there please post!!  This thing
> is more important to you (as you are more numerous) than it is to 
> the technocrats.  

Why?  Why are exploding flywheels more important to english majors?
I would assume that as long as serious and technically competant people
can weed out technical proposals most lacking merit, that english majors
should not be interested in the least.  Afterall, that is why we have
english majors and scientists and engineers.  The english majors need to
be able to rely on the technical people to have knowledge of and solve
the vast majority of technical question before they are ever put before
the general public.  Otherwise, we would need everyone to be an expert
in everything and nothing would ever get done.

If an english major is interested, however, that is fine, and I think
any such questions should be answered.  However, I don't think english
majors are in a position to argue with the technical people any more
than the technical people are competant to argue with the english majors
in the fine details of their specialties.


--
Richard Stead
Center for Seismic Studies
Arlington, VA
stead@seismo.css.gov
Xref: sparky sci.electronics:21356 sci.energy:6342 rec.autos.tech:17051
From: Ted_Eugene_Viens@cup.portal.com
Newsgroups: sci.electronics,sci.energy,rec.autos.tech
Subject: Re: Flywheel batteries as EV power source
Date: Tue, 22 Dec 92 01:28:32 PST
Organization: The Portal System (TM)
Distribution: world
  <1992Dec16.232521.14672@mtu.edu>,<71918@cup.portal.com>
  <1h2udfINNfm0@gap.caltech.edu>

>In article <71918@cup.portal.com>, Ted_Eugene_Viens@cup.portal.com writes:
>>All safeguards have been defeated.  The rotor is locked in an unlimited charg
e
------
>>kinetic energy.  The rotor is composed of three basic parts:  the composite
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  
>>flywheel, the steel axle shaft, and the copper coils used to transfer energy
>>into and out of the flywheel.  The axle shaft and hardware to mount the
>>composite flywheel will be symetrical and strong enough to stay fairly center
e
>d
>>and dispell its engery by frying the cases of the now failed magnetic bearing
s
>>over a relatively long period of time (several seconds to many minutes.)
>
>Sorry, but you apparently missed a post early in this thread where the
----
>possibly be dangerous, could it?
>
>[Further speculations based on ignorance of the designs in question deleted]
>------------------------------------------------------------------------------
-
>-
>Carl J Lydick | INTERnet: CARL@SOL1.GPS.CALTECH.EDU | NSI/HEPnet: SOL1::CARL
>
>Disclaimer:  Hey, I understand VAXen and VMS.  That's what I get paid for.  My
-----
>hold me responsible for it, but my organization had nothing to do with it.
>
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?
Still, I return to my original opening remark.  I have some faith in the engine
ers
responsible for designing Flywheel Batteries...
Bye...  Ted..
Newsgroups: sci.electronics
From: phr@telebit.com (Paul Rubin)
Subject: Soundblaster for low rent data acquisition?
Organization: Telebit Corporation; Sunnyvale, CA, USA
Date: 22 Dec 92 19:58:30

I am interested in a cheap way to monitor some slowly changing
voltages (read: DC) in a piece of test equipment.  8-bit resolution
is fine.  I can scale the voltages to the 0-1 VDC range (or similar)
using resistor networks if I need to.

Does anyone know if a Soundblaster is a reasonable way to do this?
Can I get continous DC DAC output from the soundblaster?

Are there any ADC/DAC boards that are much cheaper than $75 or so?
They'd have to be considerably cheaper, since if the Soundblaster
can do the job, I'd get one and use it for other things too.
Newsgroups: sci.electronics
From: cogsdell@mentor.cc.purdue.edu (tony c)
Subject: QUESTION:  Would you be interested in VCR repair?
Followup-To: email
Organization: Purdue University Computing Center
Distribution: na
Date: Wed, 30 Dec 1992 00:13:29 GMT


How many of you out there in Net-land would be interested in 
a video or phamplet on VCR repair??????

What about a book?

Thanks!
From: v064mb9k@ubvmsd.cc.buffalo.edu (NEIL GANDLER)
Newsgroups: sci.electronics
Subject: MAking components in Protel Easytrax
Date: 26 Dec 92 06:07:00 GMT
Organization: University at Buffalo
News-Software: VAX/VMS VNEWS 1.41


 I have been using Protel Easytrax for a month or two and love how easy
powerfull it is. It didnt even cost a thing. Protel even sent it to me
at no charge. I want to make a component. A certain ceramic capacitor
requires that I make a custom component. But how do you create the yellow
overlay like all of the other components have. I just dont want to 
place pads. Any information will be appreciated.

	Neil Gandler
From: paula@nlbbs.UUCP (Paula Stockholm)
Newsgroups: sci.electronics
Subject: Hot X-10 Module
Date: Tue, 29 Dec 92 05:57:01 GMT
Reply-To: paula@nlbbs.uucp
Distribution: world
Organization: The Electronics Workbench - Cumberland Maine


In article <1992Dec21.155030.4154@src.honeywell.com> lowry@src.honeywell.com writes:

 > 
  I can feel a fair amount of heat from the
 > module through the switchplate when the lights are on.  When off, the
 > module is cold.  Is this normal?
 > 
        I think those things are rated at 300 Watts. Heat would be
        normal. There is a triac which uses the front cover as its heat
        sink. Check the rating of the module - you may be exceeding the
        limit which - at best - will cause early failure.
From: ega029@comp.lancs.ac.uk (Lami Kaya)
Newsgroups: sci.electronics
Subject: Problem with TV
Date: 28 Dec 92 19:43:42 GMT
Organization: Department of Computing at Lancaster University, UK.


Hi,

I have got an old colour TV set. When it is left on for more than
an hour, the picture gets distorted and the colour of the screen
changes to some strange mixture, also you can hear 'chat chut' 
sounds, as if something is burning inside. I am not intending to
repair the set, but I would be pleased if I knew the reason/s for
these problems, any suggestion? 

Lami
Xref: sparky sci.electronics:21445 soc.culture.japan:12775
From: dirceu@taurus.cse.kyutech.ac.jp (Dirceu G. Cavendish Jr.)
Newsgroups: sci.electronics,soc.culture.japan
Subject: Re: DOES AMERICA SAY YES TO JAPAN? - Off track!!
Date: 23 Dec 92 05:20:02 GMT
Organization: Kyushu Institute of Tech., Iizuka, JAPAN.
	<gmkyVB3w165w@student.business.uwo.ca><BzGuDI.9x@tss.com>
	<1992Dec20.222223.632@denwa.info.com>
	<IRIE.92Dec21012249@husc11.harvard.edu>
NNTP-Posting-Host: mikan.taurus.cse.kyutech.ac.jp
In-reply-to: irie@husc11.harvard.edu's message of 21 Dec 92 09:22:49 GMT

In article <IRIE.92Dec21012249@husc11.harvard.edu> irie@husc11.harvard.edu (Robert E. Irie) writes:

 >As for educational differences between the two countries, I ask you to
 >consider this: in the streets and subways of NY and Boston (those are
 >the two cities in which I have lived for extended periods of times) I
 >see juveniles/teenagers cursing, drinking and generally harassing
 >people.  Most of them, if they go to school at all, cut classes
 >frequently. In NY, I know of several highschools where it is unusual
 >to have a day without gunshots or stabbings. I wont even mention the
 >drug problem concerning kids in all major cities. From visiting Japan
 >and listenign to Japanese news, I have not encountered an equivalent
 >situation. (I will be interested if people living there now could
 >respond) To me, no matter how "bad" the Japanese educational system
 >is, (ie- doesnt make Japanese people as literate as they claim,
 >stifles creativity, etc etc) its ability to produce useful citizens
 > who work and contribute to society insead of ruin it, makes it
 >"better" than the US system.
 >
 >
 >--
 >File: AW esome .sig            REVIEW/SEE/ADMIRE              Escape: Reality
 >=====|====|====|====|====|====|====|====|====|====|====|====|====|====|====|=
 >Robert E. Irie                                         irie@husc.harvard.edu
 >Senior ES Major, Harvard College                       irie@husc.bitnet
 >Harvard Robotics Laboratory                            irie@hrl.harvard.edu
 >-----------------------------------------------------------------------------
 >Type mail or use rn commands          Line     Column    8M, 20Mhz CPU Wanted

They DO produce useful citizens ready to work hard to their society.
BUT whom is society supposed to work well for? It's citizens.  What I
mean is: social sense - individuality. Two extreme points. Neither of
them are healthy. We shall find a balance... Japanese society works in
the left side (and their citizens pay a high price, in my opinion),
westerns (in general) in the right one.

Dirceu
From: tquinn@heartland.bradley.edu (Terry Quinn)
Newsgroups: sci.electronics
Subject: Need I/C (repost)
Date: 21 Dec 1992 21:25:39 -0600
Organization: UTexas Mail-to-News Gateway
Reply-To: tquinn@heartland.bradley.edu
NNTP-Posting-Host: cs.utexas.edu



This is a repost, but I'm getting desparate, so please bear with 
me.
 
I am looking for an IC, a Mostek MK5017.  This is a relatively
old chip, used in a Heathkit GC-1005 electronic alarm clock.
I've contacted Heath and a couple of companies (ECG, and SGS
Thomson who bought Mostek) and none sell the 
chip anymore.  Therefore I would be willing to buy a used one
if someone has one.  Please send response by email.  Thank you

--
                                    Terry Quinn
                                     Germantown Hills, IL
                                      tquinn@heartland.bradley.edu
from Compuserve . . .                  >INTERNET: tquinn@heartland.bradley.edu
Newsgroups: sci.electronics