waashk/20ng huggingface dataset:
>The father of a friend of mine is a police officer in West Virginia.  Not   >only is his word as a skilled observer good in court, but his skill as an   >observer has been tested to be more accurate than the radar gun in some   >cases . . ..  No foolin!  He can guess a car's speed to within 2-3mph just   >by watching it blow by - whether he's standing still or moving too!  (Yes,    1) How was this testing done, and how many times?  (Calibrated speedometer?)  2) It's not the "some cases" that worry me, it's the "other cases" :-)
Hi, I've got a PACE MODEM , Series Four 2400s ( made in England by PACE Micro Technology ) with a broken power supply . So I'd like to know :  - the voltage and current values of the original    power supply PS1001. - the pinout of the power supply connector. - the pinout of the USER PORT and how to use it.  Many thanks in advance to all the people help me. Please post the reply also to my e-mail..........
In article <1993Apr21.025500.8804@porthos.cc.bellcore.com>   patter@dasher.cc.bellcore.com (patterson,george r) writes: > In article <1993Apr20.232804.24632@mprgate.mpr.ca>   vanderby@mprgate.mpr.ca (David Vanderbyl) writes: > >kludge@grissom.larc.nasa.gov (Scott Dorsey) writes: > > > >>My car, unfortunately, has so much computer junk under the hood that   it's > >>astonishingly sensitive to RFI.   > > > >Hmmmmm... this has possibilities: > >If the police are in pursuit of a vehicle, maybe they can bombard it   with > >high energy RFI.  :-) >  > Right. So all the cops will be buying antique muscle cars for chase   cars; > otherwise the *police* cars will die too!  I wonder if you could focus the RFI "gun" so the cops wouldn't have this   problem???
For all those who are interested and would like to discuss the popular Secret Life..and/or other technical documentaries.. Please email me as i am starting a newsgroup
Hi,  Right now I should do some characterization of opamps. Because I don't   have special equipment for this task, I have to do this job with relativly   simple equipments (Frequency sweeper, DSO, etc.).  Does anyone know good test circuitry for characterization of opamps?  Especially for measuring open-loop gain, phase margin, PSSR, CMMR and so   on. Are there any books or application notes on this subject available?  Please reply vi e-mail or nn.  Thanks Mark
craw@yoyo.cc.monash.edu.au (Sebastian Filzek) writes:   >I think that they are avaliable in the states and even in England, but >alas I live in Australia.  Could someone please inform me if I can get >these things over here, and if so where??? and how much???  >Also are they really commonly avaliable in the states, and if so, then >how much are they and who sells them (maybe if I cant get one here, I'll >write to one of the companies over seas..)  >Anyway.... Thanks in advance...  >Sab >93   	I got mine for about 7 bucks at Radio Shack.  The instructions DO say to expose it to light for a while, but mine doesn't seem to require  very much to make it work.  	I just wish I could get a big sheet of the stuff, abouit 12" x 12" for a reasonable price.....it isn't cheap, from what I've seen.
Acetone will likely damage the carpet. First solvent to try is denatured alcohol. Do not waste your time with rubbing alcohol. You can use methyl alcohol instead of denatured alcohol. If you want to have a cocktail while you are removing the goo, use pure grain alcohol :-). If the alcohol does not work try carbon tetrachloride. If neither of these work you may need to try a stronger solvent, but the alcohol works for most adhesives. Good luck.
In article <1qi8e3$b5e@lll-winken.llnl.gov>, you say: > >I would like to digitize the output of a SQUID magnetometer (range -10 V >to +10 V) and do digital signal processing in a computer, say a Macintosh >II or a 486 PC.  I would like a good 16 bit ADC with good linearity and a >high conversion speed, at least 50 kHz, preferably 200 kHz.  Other concerns > >(2)  Must I use an ADC external to my computer to avoid digital noise >     feedback into my sensitive SQUID electronics?  Might be a good idea...  The resolution you requested is about 0.3mV In order to get what you've paid for, noise level better be lower than that.  It is kind of hard to do it in a noisy box like you can expect inside a PC.  Before you pay $$$ for a PC card, test it out by sampling a low distortion sine wave (I think there is a sine wave on a CD.  Digital Domain ?  There are possibly other low THD sources)  Run the digitized waveform through a FFT transform and take alook at the noise floor on the spectrum.  That's should give you a good indication of the design. (That's what I am doing to test a data acquistion system I have designed - I got the idea from MAXIM data sheet.)  If you can live with 14 bit resolution, I would recommend looking at the MAX121 from MAXIM.  It is a high speed (308KHz) complete sampling A/D with DSP interface.  The input range is +/- 5V and it uses a serial interface (which can easily be optically isolated from the computer to elinimate a major noise source)  The Analog design guide I got from them shows a -100db noise level.  They claim a -77db max (-85 typ.) THD.  Looks pretty good for the $12 @ 1000 pieces  A evaluation kit is available.  Might want to give these nice folks a call.  1-800-998-8800 or fax: (408)737-7194 and (408) 737-7600 ext4000 for application assistance.  This assumes that you can build your own DAS and write your own software. (Hey you can get the MAX121 as a free sample just by calling the 1-800 #)  >I would appreciate discussion of your personal experience with a Mac or PC- >based ADC system.  I would recommend you to find out the resolution that can be gotten out of your system by looking at the noise level, otherwise you might be throwing out your money.  >Charles Cunningham >cec@imager.llnl.gov  K. C. Lee Elec. Eng. Grad. Student
In article <JWATERMA.93Apr14214858@jade.tufts.edu> jwaterma@jade.tufts.edu (Jason Waterman) writes: >I talked to a friend who works for Radio Shack, and he said the deal >with the Red Batteries were that they had too much lead in them. >Condidering the Red Batteries had a life cycle shorter than a mayflies,  >I think the EPA was worried about all those batteries being dumped out.
In article <1993Apr27.145201.15495@walter.bellcore.com> deaddio@ski.bellcore.com (Michael DeAddio) writes: >Does anyone know of any type of acceleration sensor that has >an electrical output of any sort?  It would only have to sense >acceleration in one direction.  Gee, how about an (ahem) "accelerometer"! Such devices are available from a variety of sources (one that comes to mind is Bruel & Kjaer if you have a lot of money to spend). MOst of these sorts of devices output a voltage proportional to acceleration. You need to know what range you're talking about though.
In article <C6217x.2xoL@austin.ibm.com> oscar@oscar.austin.ibm.com (Oscar R. Mitchell) writes:  [request for WDC65c816 Mac cross-development stuff]  Apple themselves sells a 65816 cross-developer for the Macintosh called  'MPW IIgs' (it's intended for use with the Apple IIgs computer, which uses the '816).  > Oscar R. Mitchell
In article <1993Apr13.150525.17978@nessie.mcc.ac.uk>, sl@nessie.mcc.ac.uk (Stuart Lea) writes: > Hello, > 	I've got a problem with my CD player (SONY CDP-35) in that it refuses > to play discs - more than a minor inconvenience!  The player itself doesn't > recognise that there is a disc in.  It's an intermitant problem, but one  > that is becoming more frequent. >  > 	Is this a common problem with older CD players and, if so, what > can be done to rectify it ?  If there is no obvious answer, how can I begin to  > start fault finding.  To start off with, How does thet mach recognise that  > there is a disc in in the first place ?
In article <7480220@hpfcso.FC.HP.COM>, myers@hpfcso.FC.HP.COM (Bob Myers) writes: |> > Nope.  The dag is on the outside of the tube, and is grounded.  The inside |> > aluminization *is* the second anode, and is connected to the 'anode' |> > suction cup.  This (with the glass of the tube in between) is a capacitor, |> > and is used as the power supply bypass/filter for the HV supply.  Some |> > smaller scope tubes don't have an aquadag coating on the outside.  If they |> > are in mu-metal shields, you still have a capacitor. |>  |> Actually (and I think I said this in the original, but perhaps wasn't clear |> enough) there is usually both an internal AND an external dag.  Of the two, |> the internal dag is the more important; the aluminization of the back of the |> phosphor is in most cases not adequate to guarantee connection to the anode |> "button" (and in the case where the gun assembly includes an accelerating |> electrode at anode potential, most definitely does not provide THAT  |> connection).  Bob is indeed correct here in more than one way. A look in the old RCA picture tube manual backs this up, as does SAMS Reference Data handbook. The internal coating around the perimeter of the CRT (not the aluminum or tin CRT face coating) is referred to as a "dag" as well as the outer coating.  Thankfully, I didn't need to go to a f****** library to find it, either. One sparkling water for Mr. Vanderbyl (no caffeine in that, is there).  --  --------------------------------------------------------------------        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) *******
Hi,     I've just built a valve preamp and use a diode/capacitor voltage multiplier to step the 12vAC supply voltage up to approx  260vDV. As the load resistance increases, the RC constant decreases and hence the output voltage drops. I need as high an output voltage as possible. (about 260v).   The circuit consists of seven voltage multiplier stages (ie 14 diodes and 14 capacitors) each capacitor develops about 38v across them, and I take the output from across seven capacitors=260v.   Each capacitor is 100mfd at 68v.  If I increase each of the capacitors rating (220-470mfd), that will increase the RC constant, and hence alleviate some of the problem. These capacitors are going to be a little expensive as I need 14 of them, So:  1. What would happen if I connected a 470mfd at 400v capacitor in parallel  with the output (and hence in parallel with the seven 100mfd capacitors)?   Will it, as I assume, increase the C in circuit and hence increase the RC time constant? If it does, and my output voltage becomes more stable by doing this, then I will have killed two birds with one stone... as I am experiencing some 50Hz ripple (and hence amp hum), and this new capacitor will 'smooth' this out.  and 2. Can anyone recomend a suitable value for an inductor (choke) to be placed in the output line of the power supply to filter out the 50Hz mains hum. Lowest resistance possible !    I've not got my preamp with me at the moment because it is TOO MUCH of a distraction.... (I'm at university and I've got to get my  dissertation finished in two weeks !!!!!!!) hence I'm mailing not playing with my solderoing iron (it'll be cheaper too in the long run... especially if 14 new large capacitors don't work as planned!)  Email please.... Can't always read the net.....  Thanks in advance..   Chris ;-)    +====================================================================+   |Name : Mr Chris Smith       |     Twang on that 'ole guitar !       |   |Addrs: scst83@uk.ac.liv.csc |                                       |   |Uni  : Liverpool University |Quest: To build more and more hardware |   |Dgree: Computer Science     |                                       |   +====================================================================+   "What ever the sun may be, it is certainly not a ball of flaming gas!"   -- D.H. Lawrence.
In making batteries you could use copper and zinc in an acid electrolyte.      Copper=copper wire (pennies are now mostly zinc if I recall correctly) zinc= zinc strip (Hardware stores arround here (Seattle) sell this to prevent       moss buildup on the roof. An alternative would be to use a galvanized       (zinc coated) nail electrolyte= lemon juice -> Citric acid is the active ingrediant(sp).   Volta (late 18th century scientist) used a stack for his batteries- copper disk, paper disk soaked in acid, zinc disk, copper disk, paper .... they were advanced technology for the time.
>In article <C5qsBF.IEK@ms.uky.edu> billq@ms.uky.edu (Billy Quinn) writes: >>I built a little project using the radio shack 5vdc relays to switch >>audio.  I got pretty bad 'clicks' when the thing switched.  > >>	Is there a good relay/relay circuit that I can use for switching >>audio, so that there will be *NO* noise of any kind on the audio lines. > I missed the first part of this thread; are you switching line level or speaker level audio? If line level, there's a single chip 4x1 *stereo* audio switch available that switches 4 two-channel inputs into 1 two-channel output, and also has a mute function, all controllable with ttl inputs.  LM1037, I think?  If speaker level, never mind.  :(
Baden de Bari (baden@inqmind.bison.mb.ca) wrote: :   :         So what's the story here... we're all stuck with the regular : green, red, and off yellow-orange LED's!?  What gives!!?? :         Anybody have a 'scoop' on FAIRLY LOW PRICED >BLUE< LED's???  If your looking for LEDs in the $.10-$.20 range, forget it. Blue LEDs just recently became available and the materials they are made of are expensive. Maybe in the future they will become less expensive (and brighter), but for now it's going to cost you and the output will be limited. If they ever do get as efficient and cost effective as red and green LEDs, you're probably going to see a whole new family of color displays.
Does anyone know the details of the interface (5 wire din) for the IR remote sensor & (2 wire IR repeater) for the ADCOM GTP-500II preamp?  The ADCOM part numbers are the XR-500II, SPM-500II, and  IRA-500II.  A cursory physical examination of the pre-amp connector indicates that the connector (5 pin din) may provide: (Viewed from connector front)        |    5     1     (pin ?) +?v @ ???mA     4   2      (pin ?) +/-?v @ ???mA       3        (pin 3) Signal Ground                (pin ?) Demodulated signal ?V-pp, ? polarity, ? mA drive                (pin ?) Signal to drive repeater LED (drives through 150ohm                        resistor) ?V-pp  I assume that the repeater connectors (mini-plugs) drive the IR repeater LED's directly.  True?  Can anyone fill in the ?'s.  Thanks.
HI, I was wondering if anyone would be able to help me on twwo related subjects. I am currently learning about AM/FM receivers and recieving circuits. I understand a lot of things ,but a few things I am confused abuot. The first is the MIXER, to mix the RF and local oscillator frequencies to make the IF. Does anyone have any cicruit diagrams (as simple as possible) for this kind of mixer? I have come across a MC-SBL mixer chip But I have not been able to find it in any catalogs (ACTIVE,etc...)   Along the same note, are there any SIMPLE fm receiver circuits anyone may have stashed away somewhere and they couold let me see?.  P.S. any REALLY GOOD BOOKS on AM/FM theory ALONG WITH DETAILED ELECTRICAL DIAGRAMS would help a lot. I have seen a lot of theory books with no circuits and a lot of circuit books with no theory, but one without the other does not help.  				Thanks,
R.G. Keen (rg@futserv.austin.ibm.com) wrote: : A quick and dirty way to get higher current carrying capacity : on PC board traces for one- or few-of-a-kind boards is to : strip some #14 Romex house wiring cable to bare copper, form : the bare copper to follow the trace, and solder it down.  And if it's not quick and dirty, you can get bus bars that are stamped out with leads that insert in the PC board.
Hi there, I have a mac 512 with a burned out part which looks like a voltage regulator.  The part number is BU 406 and I believe the vender is SGS thomas judging by teh SGS logo printed on the package.  If anyone has teh spec for this part I would greatly appreciate an email with the import info so I can find a replacement.  Thanx in advance.  -Dave dnewman@lynx.northeastern.edu
I have notice a lot of electronics questions by people who are obviously not  "tuned-in" to electronics.  Many of them have rather simple answers, and  many of them require a circuit diagram.  Rather than muck up the network, why don't you write to me, send a self- addressed, stamped envelop, and I'll answer your questions, if I can.
In article <136390006@hpcuhe.cup.hp.com>, pi@hpcuhe.cup.hp.com (Paul Ilgenfritz) writes: >  > I think the Go Video dual cassette machines do a direct tape to tape copy > which transfers Macrovision to the copy.  I you can find one of these, it > would be worth a try.  Go-Video machines used in HQ2 mode will copy even the MacroVision. Go-Video phone number (602)998-3400.   Ask for sales department. Since the state of Arizona does not go on  Daylight Savings time, we effectively are in Pacific time zone.
wd@cs.tu-berlin.de (Wolfgang Diestelkamp) writes:  >In article <1rg36hINNsr6@darkstar.UCSC.EDU> hugo@cats.ucsc.edu (Hugo Calendar) writes:  >> I'm wondering if I can tote my American touch tone phone around with me >> to Sweden and Germany.  It's DC powered, and I can buy a special adapter >> for that in Europe.  The question is if the general electronics work >> the same.  I can buy a different wall plug and refit it (I'm sure I'd >> have to), but would that do the trick?  >Two things to watch for: >In Germany (and I think the same holds for Sweden) only some >of the connections can handle tone dialing, so make sure the >phone can be set to pulse dialing. >In Sweden, the '0' is the first digit and all other digits >are pushed "down" by one position; this makes dialing (and >in the process converting numbers) an interesting task.  This is just basicly right. The connections that cannot handle touchtone dialing is very few. I would estimate a couple of percents and if you are in a bigger town, there is none that cannot handle tone dialing. And regarding our swedish dialing system (a rather screwd up system), that does just apply to pulsdialing. Not to touchtone. Btw; Norway is even more interesting. They got both system! So you need different phones depending on where in the country you live.
I recently took apart my color Sony TV to clean the volume pushbuttons and when I put the beast back together, the flyback whine got much louder.  Is this easy to fix? Which part is resonating? I have heard rumors of a spray that will fix the noise.  Is this a simple thing for a TV repairman to fix?  	Thanks,
Recently, my video monitor went dead, no picture, some low distorted sound. I didn't hear the tell-tale cracking that indicated HV at work, nor are the filaments at the far end of the tube glowing orange, just nothing.  On examining the power board, I noticed the largest capacitor with a very bad bulge at the top.  Naturally, I want to replace it, but I can't find any sources.  The electrolytic capacitor is 330 mF at 250WV.  It has radial leads, and is roughly 1 1/2 inches long, 1 1/8" wide.  The dimensions are important since the whole board fits in a metal cage, leaving little room.  Living in the Los Angeles area, I've been to numerous stores (Dow Radio, All Electronics, ITC Elect, Sandy's, Yale Elect) with empty hands.  Can anyone suggest sources for high-voltage capacitors?  Mail order is  fine, although I'd rather check out a store to compare the can.  I'm going to try a video electronics store, hopefully they'll have HV caps.  (By the way, the monitor is a ATARI SC1224, Goldstar circuitry, Masushita tube.  Anyone else had problems?)  Thanks in advance, Rich K.
In article <1993Apr21.131908.29582@uhura.neoucom.edu> wtm@uhura.neoucom.edu (Bill Mayhew) writes: >From: wtm@uhura.neoucom.edu (Bill Mayhew) >Subject: Re: How to the disks copy protected. >Date: Wed, 21 Apr 1993 13:19:08 GMT  >Write a good manual to go with the software.  The hassle of >photocopying the manual is offset by simplicity of purchasing >the package for only $15.  Also, consider offering an inexpensive >but attractive perc for registered users.  For instance, a coffee >mug.  You could produce and mail the incentive for a couple of >dollars, so consider pricing the product at $17.95.  Or, _documentation_ for the program ;-).  A lot of shareware out there is  very similar in the approach - send in your money, and you get  documentation, and a free upgrade to the latest version.  Perhaps even  support of some small degree.  Whatever you want to offer that is "better"  than the circulating version.  >You're lucky if only 20% of the instances of your program in use >are non-licensed users.  Figure about 50%, as I have seen.  >The best approach is to estimate your loss and accomodate that into >your price structure.  Sure it hurts legitimate users, but too bad.  It doesn't really hurt legit users.  Shareware is still much cheaper than  the alternatives.   ----------------------------------------------------------------------------  ---------Visit the SOUNDING BOARD BBS +1 214 596 2915, a Wildcat! BBS-------   ObDis: All opinions are specifically disclaimed. No one is responsible.
In article <babb-190493113153@larc.sdsu.edu> babb@sciences.sdsu.edu (J. Babb) writes: >Fellow Info-junkies, >  I have an extra CCI #27 (Real Time Programming/Embedded Sensors & >Storage) and an extra CCI #32 (Voice control of telescope, among other >articles). No labels. No torn, cut-up, or missing pages. > >Would like to trade for CCI # 26, or CCI # 23, or CCI # 19 in same >condition (Labels OK). > >I mail mine you mail yours mutual trust kinda thang OK? >You don't actually throw them away, do you? > >Thanx, >Jeff Babb >babb@sciences.sdsu.edu  I have also been trying to complete my collection.  I have an extra CCI # 16 (Communications) and a # 12 (Applications in the Arts), both in mint condition.  I would like to trade for (or buy) the following: # 1, 3, 22, 23, 25, 26, 30, and 31.  Thanks      -David
The battery goes dead primarily becaust the floor is cold.  The temperature combined with self-discharge promotes sulfation which ruins the plates of  the battery.  I strongly suspect that the only reason the battery doesn't go dead as quickly on a dirt surface is because cement tends to be quite cooler.
The object of a cooling tower is to distribute dissolved salts in  cooling water over large areas of farmland and to therefore decrease farm subsidies for non-producers by rendering their land infertile.  A side effect of this deficit-reduction program is that they provide a low-T reservoir for a variety of industrial processes.  Now you know.   --
In article 1rjq8hINN8je@dns1.NMSU.Edu, rpeter@nmsu.edu (Peter Herman x5495) writes: :>In <LHE.93Apr26131014@yang.sics.se> lhe@sics.se (Lars-Henrik Eriksson) writes: :> :> I would not be suprised if the equipment is compatible, in fact New York :>Telephone (NYNEX) spend a lot of money on Swedish switching equipment :>recently. :> :>>Lars-Henrik Eriksson                            Internet: lhe@sics.se :> :> You can guess what brand of equipment I refer to :-) :> :	Lars-Henrik will be pleased to know that his name is :plastered all over phones at New Mexico State University as well. :They got the contract when NMSU went to a digital phone system. [snip]  Not quite correct! The company name is Ericsson. (With a 'c').   ---