waashk/20ng huggingface dataset:
Hi !!!  Is there somebody using a 56001 DSP from Motorola ??? I am searching for programms concerning audio effects. I built a 4 channel mixer (4ADC + 1DSP) for audio signals. I built some digital filters and echos, but now i want to include some effects like HARMONIC Equalizer or chorus. The problem is, I dont know how these effects work (so I cant write a programm). So if someone has programms or just knows how such effects work, please contact me in the newsgroup or via e-mail. (Also if there are books about this problem)
In article <1993Apr20.071549.24839@csc.canberra.edu.au>, u934132@student.canberra.edu.au (Ogawa / Taro Stephen (ISE)) writes: |> Could someone please tell me if a 1/4 decoder is the same as a 1 to 4 |> demultiplexer. I know how to link 2 of these to get an 8 output circuit, |> but how do I link 5 of these to make a 1/16 multiplexer. Sorry if this |> seems like a lame question, but I'm only a newbie to electronics, and I |> have to do this circuit. Please make any mail as droolproof as possible. |>  |> 				 Thanx, |> 					Taro Ogawa |> 					(u934132@student.canberra.edu.au)  A 1 of 4 decoder need not be the same as a 1 to 4 demultiplexer, although many commercial SSI implementations allow you to use one as such. Strictly, a 1 of 4 decoder need only take two lines in and make one output change state, according to the inputs.  A demux, on the other hand, uses two control inputs to determine which of four outputs will reflect the state of the input signal. So there are three inputs required.  A decoder can be used as a demux if it is equipped with an output enable input, since this can be used as the data input (e.g. when high, all outputs are high; when low, only the selected (by control inputs) output will be low).  An eight way decoder is created by using the high order bit (bit 2) to select which of two four way demuxes is enabled. Thus you achieve your aim of having only one output of eight reflecting the input bits. Note that this method cannot be used to create a true eight way demux, since you have no data input (the enable line on a four way decoder) left once you commit the enable lines to their intended purpose.  A sixteen way decoder obviously requires four, four-way decoders, plus a mechanism to enable only one of the four at a time. Therefore, use the fifth decoder, attached to the two high order bits, to provide the four enable lines.  Of course, the two low order bits must be connected in parallel to the four final stage decoders.  Please give me the credit when you submit your homework.  JohnH  ----------------------------------------------------------------------------        |  _  |_   _   |_|  _   _|  _|              Electronics Department     |_| (_) | | | |  | | (_| (_| (_| \/           School of MPCE     ---------------------------------/-           Macquarie University                                                   Sydney, AUSTRALIA 2109      Email: johnh@mpce.mq.edu.au, Ph: +61 2 805 8959, Fax: +61 2 805 8983
In article <murashiea.15@mail.beckman.com>  writes: > Does anyone know of an FTP site where I might find public > domain software for the Motorola 68HC16 microprocessor? > I am looking for a basic interpreter/compilier or a 'C' > compiler.  Thanks in advance. > 					Ed Murashie Yep, at: oak.oakland.edu they have a couple different 68HC16 things in /pub/msdos/emulators and get the file 00-index.txt for a list of what they have. lige
Since I have seen various different numbers to dial to get your number read back to you by the phone company, could someonepost a list or point me to a book where I could get a list of all the different numbers for the U.S.? Failing that, could someone tell me Ohio's?
Hi: I'd like to know how much the foll. equipment will fetch in the used equipment market (without manuals or other accessories): 	1. Tektronix 2465 scope 	2. Tektronix 2465A scope 	3. Tektronix 1240 logic analyser
In article <734953838.AA00509@insane.apana.org.au> peter.m@insane.apana.org.au (Peter Tryndoch) writes: > >So when you turn on the power, this causes the bulb to work like a neon,  >heating up and shorting out, thus providing a loop to power the heaters in  >the main tube. When the tube fires, insufficient current runs through the  >starter to keep the heat up and the bi-metalic strip straightens out  >(O/C).  Imprecise. This description   1. ignores the role of the ballast,  2. misrepresents the heating effects in the starter.  The bimetalic strip cools down immediately after the contacts short circuit, because the neon discharge stops, and much less heat is generated from the I^2R loss in the metal as compared to the neon discharge.  The starter contacts open before the tube fires.  Actually, the tube fires as a result of the back-emf generated in the ballast because of this immediate opening of the starter's contacts.  A capacitor is connected in parallel with the contacts to prevent excessive arcing during the firing.  The neon reionizes but does not draw sufficient current to prevent firing of the tube itself.
In article <LANCER.93Apr15150228@oconnor.WPI.EDU> lancer@oconnor.WPI.EDU (Stephe Lewis Foskett) writes:  >   I'm doing sound for a couple of bands around here and we need Direct >   Input boxes for the keyboards.  These are the little boxes that take a >   line level out of the keyboard and transform it into low-Z for the run >   to the mixer.  Sadly they cost like $50 (or more) each and I'm going >   to need like 5 or 10 of them!  I looked inside one (belonging to >   another band) and it looks like just a transformer.  Does anyone have >   any plans for building them?  Perhaps in Anderton's "Electronic >   Projects for Musicians" book (which I am having a hell of a time >   tracking down...)?  An Easy way to solve the problem is to use two op-amps to form the balanced low-Z output, but this solution does not provide any galvanic isolation between keyboard (or whatever plugged) and mixer. If no tight requiremets are demanded and some hum, snap, crackle and pop sounds (formed by ground loops) can be tolerated, the op-amp solution is just what you are looking for! (It is cheap...somewhat $10/DI-box). Not sure, but Craig Anderton did introduce one DI-box project in Guitar Player mag years ago (transformerless).....  >   Thanks a lot!  Hope this helps. Email, if more details wanted....  >   - lancer@wpi.wpi.edu -                    - 0{{  MoDiMiDoFrSaSo: - >   -   Mein Kopf ist ein Labyrinth, mein Leben ist ein Minenfeld    -  ----------------------------------------------------------------------- Heikki Paananen                           heke@stekt.oulu.fi The University of Oulu                   Department of electrical engineering      -Just a student Finland
The 200CD is one of three oscillators that HP made many years ago.  (The others were the Low Frequency Oscillator and the Wide Range  Oscillator.) These are the ones with the 7" diameter chrome dial, a Wein Bridge circuit that used pilot lights as the feedback loop, and firebottles that produced many volts of output.  I've just acquired a pair of these venerable old beasts.  The non-working one, SN 605, (owned by Crosley Radio at one point!) needs help. I know I can likely buy a microfiche copy of the book  from HP, but that costs.... and considering I paid a dollar for the pair in the rain at the Dayton Hamvention;-}
In article <1993Apr9.041505.8593@ringer.cs.utsa.edu> djimenez@ringer.cs.utsa.edu (Daniel Jimenez) writes: >Suppose we have a boolean function which is a minimal sum-of-products >(derived from a K-map or something), like this:  >f(a,b,c,d) = bc'd' + acd' + abc' + ab'c > >The books on logic design I have consulted all seem to imply that this >is where the analysis ends  ...  But by factoring out the >`a' term in the function, we can get fewer gates:  >f(a,b,c,d) = bc'd' + a(cd' + bc' + b'c),  >which yields 9 gates.   	Yes, but... the minimization of gates is important in part because of TIMING considerations.  A TTL gate has the basic structure of AND/OR/INVERT, and an inversion of a sum of a product is just exactly ONE gate delay.  The reason to find a minimal sum of products is that this matches a hardware optimization.  	A positive-OR gate (such as the 9-gate solution uses) has TWO gate delays (and there's another gate delay in the second term) so that the second solution, while simpler in logic symbols, can  be expected to be something less than optimal in the real world. ECL is similar to TTL, in that it can support an OR/AND gate with the minimum delay (unlike TTL, you get both true and inverse outputs for 'free' when using ECL).  	PALs are basically large programmable AND/OR/INVERT gates (with your choice of internal connections between the various sections, and perhaps some latches), so a minimum sum of products ALSO is a way to shoehorn a logic design into  a few PALs.  It's not comparably easy to design with a minimization of logic gates, but some software packages claim to allow you to do so, and will take just about any mess of gates (as a nodelist with 74xxx series logic ICs) and produce a description of a logic cell array to do the same job.  Xilinx's XACT software does this by treating each logic block as a macro, and expanding it all out, then simplifying.
In article <regmad.735519580@gsusgi1.gsu.edu> regmad@gsusgi2.gsu.edu (Michael de Kraker) writes: >koberg@spot.Colorado.EDU (Allen Koberg) writes: > >>I'm looking for any and all information regarding packet radio >>implementation on the PC.  Software, hardware, whatever. > >    /        /        /       /    Michael A. de Kraker [ Question about packet radio deleted ] > >   /        /______  /       /     Georgia State University  404-651-2390  How about rec.radio.amateur.packet?  At least at my site, there is no general packet radio (i.e. non-amateur) newsgroup.  That said, I would definately subscribe to r.r.a.packet if you want to learn about all aspects of amateur packet radio, at both the high and low ends.  Also, I would get the FAQ from the group, and then post any specific questions to that group.  Everything I could tell you is  probably in the FAQ, and the people who really know what's going on all seem to be on r.r.a.packet (although they might be here too, you never know :)  Hope it helps...
> As the subject says - Can I use a 4052 for digital signals?  I don't see > why it couldn't handle digital signals, but I could be wrong.  Anyone have > any advice?  Thanks.  Yes.  I use 74HC4066 and others commerically for this purpose so rest assured it  works fine. In one case I route bit serial digital audio using these and it  is difficult to see any signal degradation at all which surprised me given  some pretty fast edges. HC4066 is spec'd at something like -3dB @ 200MHz into  50 ohms. The more complex types are generally a little slower and more  resistive.  Plain 4000 series are not so good at handling 5v logic.  Remember that the output load is seen by the input device.
>Subject says it all - could someone tell me the pinout >for a PC type analogue joystick port?  Joystick A: 1        +5 VDC 2        Button 1 3        X Axis 4        Ground 5        Ground 6        Y Axis 7        Button 2 8        + 5 VDC Joystick B: 9        +5 VDC 10        Button 1 11        X Axis 12        Ground 13        Y axis 14        Button 2 15        +5 VDC  ---  . SLMR 2.1 . Soft judges make hardened criminals.
How does the radio Electronics free information cards work. Do they just send you some general information about the companies that advertise in their magazine or does it also give you sign you up for a catalog.
In article <C5GE69.Lo0@athena.cs.uga.edu> mcovingt@aisun3.ai.uga.edu (Michael Covington) writes: >Almost any two dissimilar metals in almost any electrically conductive >liquid. > >Example: Copper and zinc in Coca-Cola... > >copper and galvanized steel nails in a lemon... > >Don't expect much power out, but it should be easily detectable >with a voltmeter. > >--  >:-  Michael A. Covington, Associate Research Scientist        :    ***** >:-  Artificial Intelligence Programs      mcovingt@ai.uga.edu :  ********* >:-  The University of Georgia              phone 706 542-0358 :   *  *  * >:-  Athens, Georgia 30602-7415 U.S.A.     amateur radio N4TMI :  ** *** **  <><
Many thanks to those who replied to my appeal for info on a drive I have which is 3.5" 600RPM!!  I now have some information on how to modify this for use with a BBC B  computer. Not only do you have to change the speed from 600 to 300 rpm (tried that) but also change 8 components in the Rec/Play section to allow for the lower data rate (250kbit, not 500kbit as it was designed for) and also change the Recording Current to allow for the low data rate/rev speed!  Hopefully this should sort it all out .... not bad for 9 quid (normally 32  quid and upwards ....)  The drive is a JVC MDP series drive ...
If I remember rightly, there is a pulsating set of tones piped thru the CATV systems (somewheres near the FM broadcast band).  And that the cable company trucks listen for this as they roam around town.  If you can hear it over the air and not cable....
Another alternative is to cover the adhesive with another piece of duct tape then remove the tape.   If it still doesn't work, try WD-40. BQN
I am looking for information on infra red based position encoders.  The idea would be to bounce the infrared source off a wall and the device would read out the distance.  preferable it would be rs-232 addressable.    Any leads?
Sci.E(E) netters:  I am setting out to build and market a small electronic device that  requires an LCD display.  All of the analog electronics are working  fine, I have ordered a PIC ICE (not vice versa) since the PICs are so  cheap and low-power, but I am having a devil of a time finding any  LCD displays in the 6-8 digit range that are priced as low as I need.  I  am looking for somthing in the range of $1 in quantities of about  1000-10,000.  Mainstream distributors like Almac cannot help me without a part  number, or when they do look around for something in their line  they find a $15 8-digit LCD.  Even Digikey's cheapest offering is $5 in  quantity.  I know LCD displays like this must exist because I see whole  calculators for sale for $4.99, meaning the retailer probably buys it  for $3.50 and the wholesaler probably gets it for $2.50 or so.  This  $2.50 includes assembly labor, packaging, sales, transportation,  import duties, the case and keyboard, the PC Board, the processor  chip, the solar cell --- and the LCD.  The LCD can't cost much.  If anyone could put me in touch with some manufacturers and/or  distributors that handle such things I would be much obliged.  -Joe Betts betts@netcom.com
In article <199304241801.AA26885@kepler.unh.edu> dmn@kepler.unh.edu (There's a seeker born every minute.) writes: > > >   Where can I buy blinking LEDs besides radio shack?  > > >  * Does anyone sell blinking LEDs with variable flash rate? (by voltage >    I guess) If so, what hertz (pulse) rate are they adjustable or set to? > >     I'd like blinking LEDs that can be set for approx 5 hz, 10 hz,  >     15 hz, or 20 hz. Something like that... I'm interested in what's >     out there for flash rates. I like the idea of LEDs with flasher  >     circuits already in them. I hate soldering ICs in general. Guess I >     don't have a hell of a lot of patience.  > > >      Thanks, > >         Dana > If you want slow LED flash rates, adjustable by switches (or by a 4066/4016 digitally controlled switch), I suggest looking at a 555 oscillator chip. They cost ~$1 at Radio Shack (much cheaper in quantity at quality places), and you will be able to find good info about simple circuits in a 555 oscialltor notebook (I think Forest Mims has one at Radio Shack). You'll have to toy with resistor/capacitor values OR you can use your head with a little math to get the right frequencies. Any engineer worth his salt, can make a 555 osciallator... It's in the book, and left up to you to see (I hate doing ASCII circuit graphics). The 555 can accurately go from a few Hz to about 500 KHz (I think).  About the Tape Recorder gizmo, you could alter a stereo tape deck to use one channel as a DATA line (for flashing LED), and one as audio line (for voice or music). This would eliminate a lot of noise.  The data line is probably most easily done by some kind of PLL or bandpass filter (using just an op-amp). The 565 chip is a good PLL, and not hard to work with. However if you nothing about how a PLL works, I suggest you don't try this. Op-Amp information can also be found in the Forest Mims Radio Shack info-booklets, and the popular 741 op-amp is a snap to work with. Setting frequency and bandpass filter values are not so easy, so I would suggest the 555 method firstmost... I have no idea what this is going into, so I am really generalizing...  As for manufacturing techniques, if you're only goofing with it, I suggest you breadboard the thing... No need to solder. Wire-wrap would be the next, more permanent step. And lastly, soldering/PCB making. Hope that clears things......
In article <1r76sbINNkap@flop.ENGR.ORST.EDU> noeler@xanth.CS.ORST.EDU (Eric Richard Noel) writes: >I strongly disagree. I think most pirating is done by amateurs, who won't >copy the program if "diskcopy" can't do it.  I hate to disagree, but I will. :) (note: I don't pirate software, nor do I trade it. I simply have met and talked extensively with those who have. that's it. the FBI can tap someone else's phone :) Most pirating is done by people who don't use the programs they pirate. A cracked program tends to get passed on, resplendant in the various graphics and animations that advertise whoever performed the modification(s).  I admit that a large portion of the business world is involved in 'giving' copies of programs to one's fellow workers, maybe taking it home for use on one's own PC, but such trading tends to be interdepartmental or at most spread throughout the business as a whole- how many times have you had someone walking from business to business letting people copy disks?  It's mostly a matter of convenience: a person sees a program they want to use and they feel justified in making a copy since "someone's already paid for it", etc., etc. (A note: this is starting to change a bit. not much though.)  >If you're talking a 20% max goal of pirated copies, I bet that anything that >will beat diskcopy, and can't be easily copied from a hard drive, will >suffice.  what about commercially available copy programs? CopyII? how about programs like teledisk, that can do things diskcopy can't? and before anyone disputes this because they feel that those who would copy wouldn't know about this:   after working with people around computers, one comes to realize that the 'average' user doesn't know much. Any computer enthusiast is at least 200x better at pre-guessing commands and how to use them (can *you* sit down and use something without reading the manual?) and it is these people who are doing the '20% pirating', not Joe Windows User who can't remember a few arguments to the dir command.  >I hate hard copy manuals, and would rather have all docs online - *not* >because I want to copy the program, but because its usually faster and >and convenient than sifting through an old book I can't find.  really? I find it evens out- the online stuff can be read through faster, but you're stuck reading it in linear flow: start to finish, unless you jump ahead with a search or such. A book, though, you can flip through faster than you can read text on a screen and they usually have a nifty index too!  But I partially agree: I often wish I could grep something that was written down.  >Off deeper end-> Why does everyone think they need to be able to make a  >backup copy? Almost all new software must be installed to the hard disk, >so you are left with the originals as your backups. I think its a waste >of time, space, and money, as well as it makes it to tempting to "lend" >out the backups.   what if they need to re-install? The idea of a backup still holds- if the original disk goes bad, they're out of luck for about 1-2 weeks, which is the usual turn around time for a company to send a new set of disks- if they'll do it without a charge.
In article <Zw6F3B1w165w@inqmind.bison.mb.ca> baden@inqmind.bison.mb.ca (Baden de Bari) writes: >  >        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??? >  In order to emit blue light, a semiconductor must have a band gap energy within the region of 2.6 to 2.8 electron Volts. According to my physical electronics prof, you can't get an LED with that band gap. That's why you don't find blue LEDs or, for that matter, some other colour of LEDs. That is not to say that blue LEDs can't be found.  I've seen 'blue' LEDs sold, but they were just your typical visible light LED in a blue plastic covering. They didn't emit very much light...  Source: Solid State Electronic Devices (Ben G. Streetman, 3d ed., Prentice Hall) --  ----------------------------------------------------------------------------- "Right planet, wrong universe" - Douglas Adams "If we took the bones out, it wouldn't be crunchy" - Mr. Whizzo
I still think a major point is being missed... If you are worried about software pirates, NOTHING will stop them. These are people who crack software (mostly games, but so what) daily for fun. They can usually find a crack around anything, especially if the manufacturer leaves a hole for such a thing.
Yes, it is the 23, 24 and 25, in but does anyone have directions how to get there after I get to Dayton.  Thanks
In article <mcmahanC5v942.MKJ@netcom.com> mcmahan@netcom.com (Dave Mc Mahan) writes: > In a previous article, kolstad@cae.wisc.edu (Joel Kolstad) writes: >>In article <hcbC5un9L.DD0@netcom.com> hcb@netcom.com (H. C. Bowman) writes: >>> >>>I just bought a new portable CD player for the office, and I notice that >>>it proudly proclaims "8 TIMES OVERSAMPLING" on the box.   >>The data is only ever read once (barring mistracks and such, of course), >>and eventually gets turned into 44.1 KHz, 16 bit, two channel data. >>Oversampling takes two discrete data points, and interpolates n-1 points >>between them for n times oversampling.  When I asked, people said that the >>interpolation was not simply linear interpolation, but significantly more >>complicated.  >You are quite correct in your understanding.  >In case you care, the filtering method uses an FIR (finite impulse response) >filter.  I'd guess that CD makers use the same kind of method.  Anybody out >there know the real answer?   	Typical (in the old 2x-oversampling units) was a thirteen-tap FIR, implemented as a dedicated hardware addition circuit.  At this kind of speed (slow, by digital standards) such an adder is much less expensive than analog components of comparable precision.  	I gleaned this information from a hardware manual for an old CD player design; where one would find similar info for a particular CD (the digital filter IS an interesting component, from my point of view), I have no idea.  The digital filter is a kind of interpolation scheme (read a book on numerical  analysis, to see just how BROAD the term 'interpolation' is...),
In article <1qngqlINNnp8@shelley.u.washington.edu>, whit@carson.u.washington.edu (John Whitmore) writes: > In article <C5L5x0.KJ7@vcd.hp.com> johne@vcd.hp.com (John Eaton) writes: >>-s87271077-s.walker-man-50- (swalker@uts.EDU.AU) wrote: >  >>During the nuclear fission reaction the uranium fuel can get hot enough >>to melt. When this happens the liquid uranium is pumped to the cooling >>tower where it is sprayed into the air.  ... >>Contact with the cool outside air >>will condense the mist and it will fall back to the cooling tower floor. >>There it is collected by a cleaning crew using shop vacs and is then >>reformed into pellets for reactor use the next day.  Another April 1 posting.  Ahhh.