waashk/20ng huggingface dataset:
>>>  Are any brands "quieter" than others?  >Yes some radar detectors are less detectable by radar detector >detectors. ;-)  I have a Bel-966. I just looked at the manual yesterday... and it does indeed claim to be undetectable by RDD's.
In article <1993Apr21.204556.21262@cronkite.ocis.temple.edu> camter28@astro.ocis.temple.edu (Carter Ames) writes: > >   I was just wondering one thing, actually two. ( I hope that this is the >proper place to post this subject)  Oh, yeah.  This is a fine place.  We haven't had the "why does concrete kill lead-acid batteries" thread in at least six months.  >  Why does a lead acid battery discharge and become dead (totally unuseable) >when stored on a concrete floor?    The concrete simply sucks all the electrons out of the battery and drains them into the ground.  Another explanation, implausible as it is,  is that the lead-acid battery needs to be periodically charged (topped-off), otherwise the battery self-discharges and then undergoes irreversible chemical reaction.  Naawwwww.... the concrete sucks the life out.
In article <1993Apr21.085848.12704W@lumina.edb.tih.no>, ketil@edb.tih.no (Ketil Albertsen,TIH) writes: |> In article <1993Apr20.230749.12821@reed.edu>, mblock@reed.edu (Matt Block) writes: |>  |> >	I guess what I am saying is that your question is difficult, if not |> >impossible, to answer.  What exactly do you want to know?  Do you need a good |> >one for a project you are working on?  How secure must it be?  Are you trying |> >to crack one that someone else has used?  I can probably make suggestions, |> >assuming the activity is strictly legal.  (In general, it is a BAD idea, |> >legally, to tamper with copy protection.  It can also lead to corruption of |> >files which you necessarily do not have back ups of (being as they are copy |> >protected,) which can be devestating.)  Do you have absolutely no ideas for |> >practical applications, and are merely curious? |> >	Please clear up those questions, and I'll try to help as much as I |> >can. |>  |> May we interpret this as an offer to volunteer as editor for a |> "Copy protection FAQ" ? I am quite sure that I am not alone welcoming such |> an initiative! *I* will volunteer to ask some of the questions, if you will |> provide the answers :-) |>  |> Ketil Albertsen  Hey, now will you stop encouraging him? Copy protection only serves one pur- pose: to keep the honest buyer from making (legal) backup copies. It will definitely not stop any pirates. If you want to protect you soft, supply a good documentation and support. This is IMHO the *only* way of effectively pro- tecting software.  Best Regards,  Arno  --
Does anyone know what processor the Atari 2600 used? What I'm looking for is th e pin-outs for the Atari 2600.... the schematics for it it... does anyone have any idea where I could find this or any related information? This is very impor tant. Also, are the ROM chips that were used fo rthe 2600 games still available , or were they propreitary? Please email me with any responces, as this is very  important.. Thanks a million...  BTW- Anyone who works/has worked for Atari, I could really use your help with i nfo on the old 2600, please email me if you are willing to help me.... thatnks alot!!
Permit me to quote fragments of  praetzel@sunee.uwaterloo.ca's article out of context.  -Newsgroups: sci.electronics,comp.lsi.cad -From: praetzel@sunee.uwaterloo.ca (Eric Praetzel) -Date: 10 Feb 93 15:46:41 GMT  -  Currently the XNF format is propierty and I know of at least on person at -a university who was able to get it after signing a non-disclosure agreement. -The Xilinx-bit map format is pretty well top secret.  I would love to know it -because then you could make self_modifying_hardware  ;-)  As it is I had to -reverse eng. the Xilinx tools to dump the bit map to the FPGA because it only -runs on the computer with the hardware key.  self-modifying hardware could be *very* interesting --  computers that could write thier own programs (assemblers, compilers) were an immense breakthrough from calculators that couldn't.  -  I eagerly await a programmable gate array which uses a PD format and does -not cost your first born to program.  Till then we will keep on reverse -engineering whatever we can.  As it is one company that I worked at has gone -under.  FPGAs are what they needed to make their product competitive.  They -could not afford them.  In the end you could say that they could not afford -to not use them but the management discovered that too late.  -   - Eric   my condolences.  i can't even imagine what i could do with self-modifing hardware. i *can* imagine self-modifying software, and even though *all* my teachers say that's BAD, even Worse than GOTO, check out what the experts *used* to say about self-modifying code: (he uses "orders" rather than "opcodes")   "On the Principles of Large Scale Computing Machines" by Goldstine and von Neumann, collected in  _John von Neumann: Collected Works, Vol. V_ reprinted here with absolutely no permission from anyone. "We plan... to have a full size (40 binary digit) word hold either contain 1 full size number (... equivalent to 12 decimal digits, but we will use the first binary digit to denote the sign) or two (20 binary digit) orders. .... 	It should be added that this technique of automatic substitutions into orders, i.e. the machine's ability to modify its own orders (under the control of other ones among its orders) is absolutely necessary for a flexible code. Thus, if part of the memory is used as a "function table", then "looking up" a value of that function for a value of the  variable which is obtained in the course of the computation requires that the machine itself should modify, or rather make up, the reference to the memory in the order which controls this "looking up", and the machine can only make this modification after it has already calculated the value of the  variable in question. 	On the other hand, this ability of the machine to modify its own orders is one of the things which makes coding the non-trivial operation which we have to view it as."  david cary, tenor, e- and comp. engineering (finger caryd@a.cs.okstate.edu). 227 S. 163 E. Ave, Tulsa, OK  74108-3310, USA, Sol 3, Universe v. 1.2
I know this is a long shot, but does anyone know what solvent I should  use to clean duct-tape adhesive from carpet? Someone taped wires to the carpet, and now it is time to move out.  Is the solvent the same as what's used to clean up the goop in coax? (whatever that is ... but it just barely ties this query into  sci.electronics)  Thanks for your help Best regards, ruck
In article <C4vs0G.5ux@murdoch.acc.Virginia.EDU>, dgj2y@kelvin.seas.Virginia.EDU (David Glen Jacobowitz) writes: |> >>Can someone out there explain exactly what the 'trigger' |> >>feature found on oscilloscopes does? |> > |> 	{ lots og good explanation deleted}  <lots more deleted> |> 	Is it just me, or does anybody else out there NOT like digital |> scopes. My school has some beauutful 100Mhz HP that are digital with |> all the bells and whistles, including soft-keys, which I think are a |> loveley touch. ( that is, software keys. ) You don't forget that you |> are dealing with a computer. Those scopes even with all their |> neatness, still make the ickyest looking waves. Lotsa features, but |> ugly output. And those are the best digitals I have ever seen. I've |> seen a lot of cheaper digitals and they look terrible.  I think the hangup with digital scopes is that you have to know so much more about them and how they work on a scope-by-scope basis, and some of the functions are typically presented, in my opinion, in a counter-intuitive fashion (HP has made some strides in their 54600 series, IMO). Automatic setups are fine for simple, repetitive waveforms, but can give you some crazy results on more complex events where you need to understand how the scope is actually measuring/processing the event. For example, is the scope in "equivalent time" or in "real time" sampling mode (equivalent time being a mode where samples are built-up slowly by adding a delay to the trigger event each sweep)? What was the scope's actual sampling rate at the time? How is the data being massaged after capture but before display, etc. One common misconception is the speed of the scope.  Is the HP scope you're using really a 100 MHz scope? Or is it a 20 MHz sample rate scope (~5 MHz single shot significance) whose front end including S/H can support 100 MHz waveforms (important for equivalent time sampling)? The 100 MHz input in this case really only helps you when your waveform is repetitive, or on a single sample, when you get lucky and hit a transient event during a sample time.  So, there are a lot more variables in understanding how to get useful information from a digital scope. I prefer an analog scope for general use and the digital for events where I need storage for later analysis or comparison, when the event is within the capability of the scope. Now, for the price of true 100 MHz digital scopes to fall...  --  --------------------------------------------------------------------        Dave Medin			Phone:	(205) 730-3169 (w)     SSD--Networking				(205) 837-1174 (h)     Intergraph Corp.        M/S GD3004 		Internet: dtmedin@catbyte.b30.ingr.com   Huntsville, AL 35894		UUCP:  ...uunet!ingr!b30!catbyte!dtmedin     ******* Everywhere You Look (at least around my office) *******
Michael Covington (mcovingt@aisun3.ai.uga.edu) wrote:  : This topic was beaten to death a year or so ago.  : The concrete is not the problem.   : Lead-acid batteries often fail from disuse (not being charged for a long : time), but there's no way the concrete floor could be the cause of the : problem.  Ditto. The only remote, and I do say remote, possibility is that if the ground was REAL cold (< -30F) the battery might freeze an split. But then it would probably freeze anyway :-)
In article <1993Apr26.074500.13256@das.harvard.edu> squish@endor.uucp (Shishin Yamada) writes:  # when soaking in water). Lasers are slightly sharper, but the only # instance where I needed precise layouts was Printed Circuit Board # Transparencies for PhotoEtching. I found a Textronix color Phaser # Postscript (Thermal Wax Transfer) to work the best to make PCB # negatives directly onto a transparency. #   Did the deskjet work at all when printing on transparencies ? If it did, what sort of resolution could it manage ?  -adrian
If companies compressed their executables with LZW andd did some kind of encryption in the process, this "change two bytes here" thing would go right out the window.
I am making a search for a CAD program that does a decent job of making schematic drawings.  The program needs to be in MS-DOS, Windows if possible.  What I want the CAD program to do is to draw diagrams by dragging elements onto the screen, and in this the elements needed are as diverse as vacuum tubes to ICs (case with pins). It also needs to have provision for adding legends to the components as well as their values.  In other words I want to produce quality drawings.  Printout would be to either 24 pin dot-matrix and/or Laser Printer.  If you know of such a CAD program that is of reasonable cost, please respond.  Fred W. Culpepper OLD DOMINION UNIVERSITY (Retired) fculpepp@norfolk.vak12ed.edu
ketil@edb.tih.no (Ketil Albertsen,TIH) writes:  >In article <1993Apr20.230749.12821@reed.edu>, mblock@reed.edu (Matt Block) writes:  >>	I guess what I am saying is that your question is difficult, if not >>impossible, to answer.  What exactly do you want to know?  Do you need a good >>one for a project you are working on?  How secure must it be?  Are you trying >>to crack one that someone else has used?  I can probably make suggestions, >>assuming the activity is strictly legal.  (In general, it is a BAD idea, >>legally, to tamper with copy protection.  It can also lead to corruption of >>files which you necessarily do not have back ups of (being as they are copy >>protected,) which can be devestating.)  Do you have absolutely no ideas for >>practical applications, and are merely curious? >>	Please clear up those questions, and I'll try to help as much as I >>can.  >May we interpret this as an offer to volunteer as editor for a >"Copy protection FAQ" ? I am quite sure that I am not alone welcoming such >an initiative! *I* will volunteer to ask some of the questions, if you will >provide the answers :-)  >Ketil Albertsen  That's great.  Read my article.  Edit out the personal formality, and save. -- ------------------------------------------------------------------------------- George Gruschow                                Death do you gronk. ag625@yfn.ysu.edu                              ggruscho@nyx.cs.du.edu
I am looking for a 20/40 MHz scope, in good condition.  Please email me or call me at (713)280-2788.
sburton@dres.dnd.ca (Stan Burton) writes:  >I would like to be able to detect the angular position (low accuracy) of an >IR emitting source at a distance of about 100 meters (more is better) in >daylight.  The IR source could be emitting a signature; I'm leaning toward >30 KHz square wave with 50% duty cycle.  >I am considering the use of a quadrant detector from Centronic Inc. to give >information to a pan/tilt head to point the sensor and thus determine the >angles.  For the source I am considering wazing the heck out of an IR LED(s), >possibly an Optek OP290 or Motorola MLED81.  Wazing would mean at least 1 Amp >current pulses.  At this current the duty cycle of the LED drops to 10% and I >would need to cycle five of them in turn to get the 50% required.  >Has anyone done something like this?   	Yeesh, you WILL be nailing those IRLEDs.  May I suggest getting your mitts on the Siemens SFH484-2 IRLED?  This unit is designed to take some big current pulses if you can get your duty cycle down a bit.  It will output nearly a watt (975 mW) with REAL short duty cycle times.  (nice thing about the SFH484-2 is that it is CHEAP.  I got mine for about 50 cents a piece, even though I had to buy 100 of them....)  	BTW, I have seen IRLEDs with outputs up to 6 watts...honest, 6 WATTS.  I don't have the book here at work so I can't recall the company name.  The 6 watter ain't cheap, around $108 but if you want some power, mamamia, that's pretty hot.  They also have a 4 watt, a 2 watt and a 1 watt device in their line, and will sell small quan. to individuals. If you are interested, I can find the book at home and get the pertinent info.  	Now, as for the position detector, you might try ELTEC in Florida. Phone number listed in the 92/93 ETID is 904-253-5328.  They seem like  nice people.  Their specialty is passive infrared detection devices, so they might be able to help you out.  	I'm curious about your applications if you don't mind saying. The device sounds like it could be useful in a lasertag game, although you'd need to up your carrier signal concept to 58.8 KHz......
In article <C65EGz.BG1@acsu.buffalo.edu>, v064mb9k@ubvmsb.cc.buffalo.edu (NEIL B. GANDLER) writes: > 	I just got a copy of spice 5.2. I would like to know if there are > any published books on the market yet and where I could get one. I would > appreciate any help. Thank You >  > 		Neil Gandler >  ISBN 0-13-747270-6
I heard that MAGIC has been transported to the Macintosh environment.  Does anybody know where I can get a hold of this?  Thanks in advance for any responses.
I've had my Fluke 8060A here at work for just over 10 years now. It is a wonderful meter.  Several colleagues here have some of the newer Fluke meters, though I still would just as soon hang on to my 8060.  The 8060 a is the 1980s digial "analog" to the Simpson 260 analog DMM of the 1950-1960s.  There was/is (?) an 8060B that had extended frequency response.  I've got a nifty little pen shaped meter made by Soar that I keep in my toolbox at home.  I've had that for six or seven years now and only replaced the batteries a couple of timees; it is more than adequate for day-to-day hobby use.  I think Soar OEMs their stuff for a number of vendors.  Some of JDR Microdevices' stuff looks rather similar to Soar's.
In article <34T302tW40N601@JUTS.ccc.amdahl.com> dws30@p1hdb01cd.amdahl.com (David Sharpe) writes: > > Pink Noise and White Noise are equal amounts of all frequencies.  This >is in most cases around the 20-3.3K Hz range.  Pink/White are used to >adjust for room dynamics and stuff like that.  There are a few EQ's out >on the market that have Pink noise built in.  Most all from Audio >Control have them I know the C-101 does.    Wrong, wrong, completely wrong (and a little misleading, too).  White noise is random noise whose energy density is constant for a constant bandwidth. That is, a 5 Hz wide band at 20 Hz will have precisely the same amount of energy as a 5 Hz band at 20 kHz.  Pink noise is random noise whose energy density is constant for a constant precentage bandwidth. Thus, a 5% wide band of noise at 20 Hz (whose bandwidth is 1 Hz) will contain the same energy as a 5% wide band at 20 kHz (whose bandwidth is 1000 Hz wide).   White noise is often used with spectrum analyzers that have constant bandwidths, pink noise is used with audio-type real-time analyzers whose bandwidths are centert-frequency dependent (often described as "1/3 octave" or "1/2 octave" or some such terminology).  White noise, relative to pink noise, has more energy at high frequencies (at a rate equal to 3 dB per octave). Pink noise, relative to white noise, has more energy at low frequencies (at a rate equl to, again, 3 db/octave).
I had the insturment panel go out in my car (a 1990 Lincoln Contenintal) which is a digital dash. They replaced the whole thing with a 1991 dash (thank god it was under the warrenty ! :-) Anyway, the odometer was reading the exact milage from the old panel. It must have a EEPROM of some sort in it that is up-dated. Seems to me that removing the battery would erase it, but it doesn't. So I guess they swapped the NVM chip (non-volitile memory) and installed it in the new dash. No, they wouldn't let me have the old dash to tinker with :-(
In article <1993Apr26.104008.1@ulkyvx.louisville.edu> kpjone01@ulkyvx.louisville.edu writes: >I have an IC I need help in identifying.  It is an 8-pin IC with the following >label:  W03563  9144w4    The 9144w4 is the date code but none of my books list a W03563. What is it out of and can you tell us what kind of circuit it is in?  In the odd case that 9144w4 is not the date code, NTE says a 9144-60 is an AM reciever subsystem and a 9144-61 is an FM subsystem, but these are both in 16 pin packages.
Hi, I am looking an integrated circuits for my Z80-based  computer. The circuit is called Z80-STI (Serial Timer Interrupt),  MK3801, and made by Mostek. Mostek is called SGS Thompson today.   I have been in contact with SGS Thompson, unfortunately  they me told that Z80-STI is obsolete.   So, my question is if anyone know if I can get hold of that  circuits. Are there any companies that specialize in selling  circuits that are no longer in production? I have contacted  several electronic brokers in Sweden, but without any success. I would appreciate if you  could give me hint where I should continue looking. Even  companies in the United States would be fine, since this  circuit is pretty crucial to me.     Thanks in advance.
What's the latest and greatest way to dim incandescent lamps ?  March '93 Circuit Cellar has part one of an article about dimming 120VAC lamps, but it seems to lead into phase- control as the best method for controlling brightness.   I've always hated phase-control for the RFI, buzzing filaments and non-linear adjustment range. I had heard that you can modulate the AC line on a cycle by cycle basis to get better results. To cut the lamp's power to 50% you would givemsay 20 cycles of AC, then nothing for another 20 cycles. I wonder if anyone has tried this or knows what the pro stuff is using. Any advice is appreciated!  Ken
{Jason Haines} said    "what to do with old 256k"       to <All> on 04-15-93  04:38   JH> I was wondering if people had any good uses for old  JH> 256k SIMMs.  I have a bunch of them for the Apple Mac  JH> and I know lots of other people do to.  I have tried to  JH> sell them but have gotten NO interest.      How about collecting them all together (IE everyones) and     selling them as a lot?  The other thing is to give to a     recycler.   JH> So, if you have an inovative use (or want to buy  JH> some SIMMs  8-) ), I would be very interested in hearing  JH> about it.      If they are free and you can send them real cheap!  I would     be intrested in them.  hehehe  Are these 2 chip or 8 chip     devices what speed?   JH> I have seen RAM disc storage devices but they have been  JH> very pricey (plus I am still a little worried about having data  JH> stored on RAM).      Why?  Do you use a RAM disk? :)                  Stephen Cyberman@Toz.Buffalo.NY.US              Mangled on Fri  04-16-1993  at 19:58:29
I'm trying to bring in 8+ bits to a PC, and would like 	to use interrupt-driven routines. Without buying an IO 	board or making a new port, _where_ can I bring in these 	bits? LPT seems to have only a few inputs, but I've heard 	rumours that some LPTs have bidirectional lines. Anybody 	know fer sure? If any bi-d LPTs, which boards have them 	(I'll be running a new 386DX-33)?  ------------------------------------------------------------------ Alan Erickson   erickson@baltic.nmt.edu		  to all SunRayce '93 competitors: I hope you're getting about as much sleep as I am.....
In article <1993Apr27.202305.4363@mav.com>, toddi@mav.com (Todd Inch) writes: > In article <1993Apr16.003132.1@wcsub.ctstateu.edu> > ritterbus001@wcsub.ctstateu.edu writes: >  > Regarding pointing an antenna at a "leaky" CATV cable: >  > >Wow, what a concept!  Does anybody want to speculate on how this > >"non-connection" would fit into the theft of cable services laws? > >It seems to me that unless this case is specifically written into > >the legislation that the cable company would not have a leg to > >stand upon in court. >  > Well, the CATV company, in the US, is accountable to the FCC for how > much transmission their cables make.  In fact, I've heard first hand > about how the CATV company asked to inspect the wiring in a > home/business to find the source of RF leaks.  I've heard many of their > vans have RF detectors and they keep one eye on them as they drive down > the street. >  > If the cable is leaky enough to have usable signal, I would GUESS that > they're probably in violation of FCC transmission laws. >  > In England they do (did?) require permits to OPERATE A TV!!! > Supposedly, the "TV police" drove around with RF detectors looking for > the IF or whatever produced by a receiver that wasn't registered.  I'm > guessing the purpose was just something else they could get away with > taxing.  I don't know if the "TV police were/are just urban legend or > an actuality.