HDTenEightyP/NetNews huggingface dataset:
From: wang@hp4at.eunet.co.at (Wang)
Subject: Z80 crossassembler for MSDOS or Unix searched!
Reply-To: mza@pag.wang.co.at
Organization: EUnet EDV-Dienstleistungsgesellschaft m.b.H
X-Newsreader: Tin 1.1 PL4
Date: Sun, 6 Sep 1992 18:13:53 GMT

I'm searching for a shareware/PD crossassembler for MSDOS or Unix.
Should include debuggingtools.

Thanks a lot!
/m

-- 
Michael Zacherl, Wang Austria Ltd., Vienna         |
E-MAIL: mza@pag.wang.co.at                         | "Proof your chances,
PHONE:  +43 (1) 89-111 ext. 433                    |  and leave them or not."
FAX:    +43 (1) 894-17-14                          |     
Newsgroups: sci.electronics
From: manson@ecf.toronto.edu (Bob Manson)
Subject: Help with autoplace of parts in PADS package
Organization: University of Toronto, Engineering Computing Facility
Date: Sun, 13 Sep 1992 23:08:22 GMT


I have a question about the PADS package.  I tried making a schematic
diagram and then importing it into the PCB layout program.  It reads the
schematic, but it lumps everything in the lower left hand corner of the
screen.  If I "create" a board and try to autoplace the components, they end
up in a jumble on top of one another.  I rtfm'd, but obviously didn't find
the answer.  Is there a set-up problem?  If so, is it in the schematic
capture part of the program, or the pcb part?

				any help would be much appreciated
				bob
Newsgroups: sci.electronics
From: provost@vlsi.polymtl.ca (Benoit Provost)
Subject: Re: Circuit to multiply audio signals wanted.
Organization: Ecole Polytechnique de Montreal
Date: Mon, 7 Sep 1992 04:59:31 GMT

	If somebody got the answer, would it be possible to send it to the 
group too (or E-Mail me the answer).  I'm interested in this kind of stuff

					Svann Le Terrible
					provost@info.polymtl.ca

--
Benoit Provost                   |   Pattison's law of electronics:  t
provost@vlsi.polymtl.ca          |   if wires can be connected in two  a
Ecole Polytechnique de Montreal  |   different ways, the first way        yl
Montreal, Quebec, Canada         |   blows the fuse.
From: Corwin Nichols <corwin@igc.apc.org>
Newsgroups: sci.electronics
Date: 08 Sep 92 21:07 PDT
Subject: looking for electric car newsgroup
Nf-ID: #N:cdp:1466200003:000:283
Nf-From: cdp.UUCP!corwin    Sep  8 21:07:00 1992


Can anyone point me to a newsgroup covering electric cars?  My site
doesn't seem to currently although if I knew what I was looking for, 
perhaps I could get the feed for it.  Please reply via email since this
site only keeps one days worth of this newgroup.  Thanks.
corwin@igc.org

Newsgroups: sci.electronics
From: wa2ise@cbnewsb.cb.att.com (robert.f.casey)
Subject: Re: Wanted: waterfall/fountain noise
Organization: AT&T
Date: Sat, 12 Sep 1992 01:41:58 GMT

You may already own one:  How about an FM stereo (or mono) radio tuned
to a frequency without a station?  You'll get hiss, maybe you can play
with the bass and treble controls to make the sound you want.
From: gude@uniwa.uwa.edu.au (David J W Emrich)
Newsgroups: sci.electronics
Subject: re: what is this device (Small IC).
Date: 10 Sep 1992 22:57:27 +0800
Organization: The University of Westrn Australia
NNTP-Posting-Host: uniwa.uwa.edu.au
Keywords: k333 sae amplifier

covingc@ee.tamu.edu (Zaa!) writes:

>I have an SAE A202 Stereo Power Amp that I'm working on.  It has one
>noisy channel (random static noise) and I've traced this all the way
>back to its input board.  I suspect that its coming out of a small 6
>pin IC of some sort.  It looks something like

>          |   |  |
>         +--------+
>         |  K333  |
>         |  F BE  |
>         +--------+    (about .2 x .25 inches)
>          |   |  | 

>There are no markings other than the ones shown above.  I assume it is some
>sort of amplifier, as the input to the amp goes through a cap into this with
>some resistors to ground, etc., and other pins connect to supplies, bias net
>works, and transistors further along in the amp.

>Anyone out there know what this is exactly?  And where I can find one?

>Also, is SAE still around, or does anyone have any info on this amp (I'm
>doing this "blind," no schematic, etc.)

>Thanks in advance...

>Charles E. Covington
>covingc@ee.tamu.edu

At a guess, I would say that what you are looking at is a dual
transistor package.  Probably FETs as I guess the K is for 2SK, hence
the part is probably a 2SK333.  Hope this helps some.


[dav]    aka
David Emrich
gude@uniwa.uwa.edu.au
Newsgroups: sci.electronics
From: rvk@blink.att.com (Bob Kline)
Subject: humidity sensors
Organization: AT&T
Distribution: usa
Date: Wed, 9 Sep 1992 14:15:49 GMT
Summary: humidty sensor source
Keywords: humidity sensor

a while back, someone was asking about humidity sensors and circuits.  I found the
following source.   I've used the "RH-8" relative humidity sensor, and one of the 
SCMC circuits.  They work quite well.  The devices are not cheap.  In 1987 the price
of a linearizing chip and sensor was about $20.  The way electronics is, the price
may have gone down. 

* General Eastern "the humidity company".  Watertown, MA.  1-800-225-3208 (as of 1987 anyway).


-r. kline
rvk@blink.att.com
From: adler@nic.cerf.net (Bruce Adler)
Newsgroups: sci.electronics
Subject: Re: Is this legislation for real?
Date: 9 Sep 92 03:29:16 GMT
Distribution: usa
Organization: CERFnet

In article <2AAD3A94.9828@news.service.uci.edu> gkwan@balboa.eng.uci.edu (Greg Kwan) writes:
>_Electronic Design_, page 73.]
>
>I just spent about 2 hours with the government publications librarians
>(at UCI) and we couldn't come up with anything at all. S1706 is not

Look for section 1705 of the Tax Reform Act of 1986, (HR3838), aka
Public Law 99-514.
Newsgroups: sci.electronics
From: ent767l@monu6.cc.monash.edu.au (Patrick Pleass)
Subject: c compiler for the 8051 ? please...
Summary: 8051
Keywords: 8051
Organization: Monash University, Melb., Australia.
Date: Wed, 16 Sep 1992 02:50:36 GMT

Hi People..
           I hate assembler so i am seeking the above....
I have heard they are about... but i havent been able to find one  :<

Any help would be greatly apriciated....

Thanks in advance......
                             Patrick Pleass..
                             elec eng. 3rd year..
                             Monash Uni
                             Melbourne.  Australia..
From: flux@sys6626.bison.mb.ca (John Kamchen)
Newsgroups: sci.electronics
Subject: GAL LOGIC
Date: Wed, 09 Sep 92 00:50:26 CST
Organization: system 6626 BBS, Winnipeg MB

I am having major problems trying to program a GAL chip.  I'm using a 
ShareWare software/hardware package to get the job done. There is no 
doubt in my mind that the system does work, but it still won't program 
the GAL.  I built my own programmer, and wrote software for it.  From 
that I can tell, on the scope & all, the signals going to the GAL are 
100% correct, but it STILL won't program.
(When I read the chip back, all the bits are cleared)
I have blown three GAL chips so far.. the last one came a a shock.. I 
placed it in the circuit, issued the command to program it, and for the 
first row, the EDIT voltage was a steady 16.5v .. then came the /STR 
pulse. At that point, the EDIT voltage went down to 2.67v, and stayed 
there.. it has never come back to 16.5v  (my three 'blown?' GALs all 
exibit this problem.  The 10ms /STR pulse comes from a '221, so it thats 
pretty stable.  I'm at my wits end.   I have planned to use GALs in my 
next few projects, and this is problem is getting to me (and my pocket 
book).
I'm using part number  PALCE16V8H-25  from AMD.  I could find NOTHING on 
these chips at my local store.. nothing (I read that AMD sends the 
programming info ONLY to registered manufactures of PLD programmers)
ANY speck of help would be a ray of light in my bleak tunnel.
 
(Quick info: my programmer shuts off Vcc and EDIT before a chip is placed 
in the socket. I cannot see anything wrong with my hardware or software)
-John

;--- (John Kamchen) a user of sys6626, running waffle 1.64
;E-mail: flux@sys6626.bison.mb.ca
;system 6626: 63 point west drive, winnipeg manitoba canada R3T 5G8
Newsgroups: sci.electronics
From: pjh@mccc.edu (Pete Holsberg)
Subject: Re: Need Help With SCSI Device
Organization: The College On The Other Side Of Route One
Date: Mon, 14 Sep 1992 19:21:40 GMT

In article <pqtsceo@zuni.esd.sgi.com> olson@anchor.esd.sgi.com (Dave Olson) writes:
=In <1992Sep13.151356.1307@mccc.edu> pjh@mccc.edu (Pete Holsberg) writes:
=| The Trantor MiniSCSI converter gets its power from pin 38 of the SCSI
=| device it plugs into, in this case, a WangDAT 1300. However, the W'DAT
=| poops out only 2V amd the M'SCSI wants 5.
=| 
=| Could someone tell me about pin 38 before I start futzing around with 5V
=| power supplies and piggyback connectors? :-)
=
=Pin 38 on the centronics connector is termpower, on ribbon cables
=it is pin 26.

That explains my second question. ;-)

>Only one device on the SCSI bus is required to
=supply termpower, and not all devices can be jumpered to supply it
=(many assume the host will supply it).  When present, it only
=needs to exceed 4.25 volts under SCSI-2 (not 5), and I think it
=was only 4 v required under SCSI-1.  Since a diode is also required
=when termpower is supplied, you will seldom see 5 v on the termpower
=line.  Presumably the Trantor is able to accept that, since from all
=accounts it mostly works.

But the Trantor will not function with the 2V that is present on pin 38.

=As I recall, the WangDAT units *can* be jumpered to supply term
=power, but you'll have to check your manual to see if this is true,
=and which jumper(s)/switches to change.

Manual? There's a manual?? I bought this through a VAR. :-)

Seriously, I'm getting 2V on pin 38. Doesn't that mean that the term
power pin has already been jumpered?

Pete
From: sinster@cse.ucsc.edu (Darren Senn)
Newsgroups: sci.electronics
Subject: Programming NS PLD's
Date: 11 Sep 1992 23:21:07 GMT
Organization: University of California, Santa Cruz (CE/CIS Boards)
Distribution: na
NNTP-Posting-Host: ritter.ucsc.edu

Does anyone have the specification for the algorithm for programming
National Semiconductors programmable logic devices?  I've got the
algorithm for their EPROMs, but I also need the algorithm for their
PAL's, GAL's, and PEEL's.  I called National Semiconductor the other
day and they said they only give those algorithms to programmer
manufacturers.  Nevermind the fact that I'm to building a programmer,
I'm not a company.  :(

If anyone can help me out, I'd greatly appreciate it.  BTW: I rarely
read this group, so please reply through mail.
-- 
Darren Senn                                            Phone:    (408) 479-1521
sinster@scintilla.capitola.ca.us                       Snail: 1785 Halterman #1
Wasurenaide -- doko e itte mo soko ni anata wa iru yo.     Santa Cruz, Ca 95062
Newsgroups: sci.electronics
From: kbk@netcom.com (Ken Krovchuck)
Subject: Re: Filtering TV Commercials
Date: Sat, 05 Sep 92 02:32:53 GMT
Organization: Netcom 

In article <1992Sep03.042045.5095@ecst.csuchico.edu> rmintz@ecst.csuchico.edu (Rich Mintz) writes:
>I'm interested in building a device (or making my 386sx 
>act like one) that will be able to distinguish television 
>commercials from television programs. I've talked to a 
>few people and have heard of a couple of ways it is said 
>that this can be done.
>   Rich -> rmintz@cscihp.ecst.csuchico.edu

Sounds like a gadget in Carl Sagen's novel "Contact", if memory
serves correctly.
It was called Adnix, and the man who made it became very rich, then the
advertisers figured a way around it, then the man came up with a new
Adnix... until TV finally went bankrupt.

If it is possible for you to tell the difference, then it should be
possible (not cheap) for a machine to tell the difference. You would
probably need to make some sort of neural-network device, which could
learn on its own what type of signal is characteristic of a change
from program to commercial. The current state of this technology
would make this way too expensive, however.

Anything simpler based on a volume level or Closed Captioned signal
would probably be obsolete the day the advertisers heard about it.
And if you do find something that works, you will just end up with
everything being pay-per-view.

I do know of one way that will work, can be built in about an hour,
and will probably be cheaper than any other method:
    Hire someone to push the mute button for you.
    Sorry, I just had to say that ;-)

                                                     --Ken
                                                     --kbk@netcom.com
Newsgroups: sci.electronics
From: mustafa@seas.smu.edu (Mustafa Kocaturk)
Subject: Re: Try this with your DMM
Summary: Using a DMM to measure its own battery voltage
Organization: SMU School Of Engineering and Applied Science
Date: Thu, 10 Sep 1992 05:31:34 GMT

In article <BuAB37.6I6@suite.com> suite!tarbell@uunet.uu.net writes:
>Have you ever tried to get a DMM to measure its own battery voltage?
>
>It seems that one must decouple the input from the battery terminals,
>but there must be a trick to it (I'm using a .01mfd disc cap).
>

Yes, one can manually simulate a kind of sample & hold circuit
using a capacitor. Use a 1000 microfarad capacitor to sample the
battery voltage of the DMM. Since DMM's usually have an internal
resistance of about 1 to 10 MOhms, you should most likely be able to get a
reading within +/- 1 least significant digit for a 3.5 digit DMM
(1/2000 of full scale) off the charged capacitor for at least a duration of
approximately 1MOhm*1000uF/2000= 500 ms (1/2000 of the time constant).
This time is barely enough to observe a stable digital display,
unless there is a bar display, or a hold-display function.

One can even go further and design an electronic sample-and-hold
circuit that has a periodic sampling interval. A simple one can be designed
by using a pair of MOSFET SPDT bilateral switches ( If I am not mistaken,
CD4069 would do it) to alternately connect the capacitor terminals
to the battery poles and the measurement probes. The switching frequency
can be increased in order to use a smaller holding capacitor.

>What happens is that the display cycles +/- 2 volts around the true
>value, but never settles down, seeming to indicate a ground loop.
>
>Any ideas?

IMHO, the fluctuation in the display might be the side effect of a feedback
mechanism built into the DMM circuitry to offset a common mode voltage
appearing in the differential inputs of the DVM circuitry.

Another possibility is that one of the probe terminals does not have a
high series resistance in its connection to the DMM, and connecting it to
a battery terminal causes considerable battery current to flow through this
path, causing a drop in battery voltage, and therefore, a malfunction
in circuitry sensitive to the supply voltage
(a ground loop, using your terminology). A high current through
a probe may also drive the input op-amp into saturation, with displayed
results depending on the type of ADC and display control methods used.

Yours,
-- 
Mustafa KOCATURK  mustafa@seas.smu.edu   Electrical Engineering Department
Home:(214)706-5954  Work:(214)692-2541   SMU Box 753190, Dallas, TX 75275-3190
From: jgd@dixie.com (John De Armond)
Newsgroups: sci.electronics
Subject: Re: D/A on parallel port
Date: 11 Sep 92 17:57:45 GMT
Organization: Dixie Communications Public Access.  The Mouth of the South.

HARVEY@SLACVM.SLAC.STANFORD.EDU writes:

>I am looking for the circuit to output sounds through the parallel port.
>The schematics in the MODPLAY package are difficult to understand. Does
>anyone out there have a better schematic for this circuit. Any help
>will be gratly appreciated. My computer understands Orcad, Pads , Gifs as
>well as Postscript.

No schematic needed.  Connect an R-2R resistor network across the bits
of the port.  Viola, instant D/A.  This is what the covox talker
does.  If you can't find a network, you can make one yourself.

          2 * R
bit ----VVVVVV-------+
                     /
					 \
					 /  R
                     |
bit ----VVVVVV-------+
                     /
					 \
					 /
                     |
bit ----VVVVVV-------+
                     /
					 \
					 /
                     |
MSB ----VVVVVV-------+---------------- out

John
-- 
John De Armond, WD4OQC               |Interested in high performance mobility?  
Performance Engineering Magazine (TM) |
Marietta, Ga                         |Interested in high tech and computers? 
jgd@dixie.com                        |Write me about PE Magazine
Need Usenet public Access in Atlanta?  Write Me for info on Dixie.com.
From: pvr@wang.com (Peter Reilley)
Newsgroups: sci.electronics
Subject: Re: 3rd Party PADS Manuals?
Keywords: PADS schematics
Date: 8 Sep 92 14:13:16 GMT
Organization: Wang Labs, Lowell MA, USA

johna@psdcae1.gvg.tek.com (John Abt) writes:

>In article <1992Sep4.120131.5672@pt.com> kng@pt.com (Ken Gravenstede) writes:
>>Are there any 3rd party manuals for PADS?  
>>The manual that comes with the 
>>shareware version is just too little.  I realize that if I buy the full version
>>I'll get the full set but what they supply is not really enough to do a small
>>board.

>Has anyone done a small board?? Is the above true?
>I have the shareware but I haven't done anything with it yet.

	I have the shareware version and the minimal manuals.   There
are a few step by step examples illustrating the process of schematic
capture, pc layout, part creation, plotting, etc.   I was able
to create a small design without too much difficulty.

-- 
>>>>>>>>>>>> Peter Reilley ..... pvr@wiis.wang.com ..... KA1LAT <<<<<<<<<<<<<
                     Well, that about says it.
Xref: sparky sci.electronics:15359 alt.guitar:7845
From: snoswell@sirius.ucs.adelaide.edu.au (Michael Snoswell)
Newsgroups: sci.electronics,alt.guitar
Subject: Re: Building effects units for guitars
Date: 8 Sep 92 14:10:19 GMT
Organization: The University of Adelaide
NNTP-Posting-Host: sirius.itd.adelaide.edu.au

stites@matt.ksu.ksu.edu (Ross M Stites) writes:

>Michael.Bremford@comp.vuw.ac.nz (Mike Bremford) writes:


>>Well, I'll give the advice I was given.
>>Find a book called 'Electronic Projects for Musicians' by Craig Anderton
>>(Probably in your local library) Has lots of little boxes, some of them useless
>>but some are quite good, eg Compressor/Limiter, Some sort of box which can be
>>configured as a Waa pedal, a 'Tube-type' fuzz box... can't remember the rest.
>>Worth a look.

>I would recommend this book too, especially if you have no or little 
>experience with electronics.  Just beware that the book is over 10 years
>out of date.  A lot of those projects can be built better with simpler
>designs now, then they were at that time.  Also, a lot of the parts used
>in the book are no longer produced.  

>Ross Stites
>(stites@matt.ksu.ksu.edu)

Craig wrote for Guitar Player (or was it just Guitar) magazine. The
book is a compilation of his columns. I have a few I photocopied from
the library before the pages were ripped out. He's got some good ideas
on rewiring pickups to get a wider variety of sounds too.

Cheers
	Michael Snoswell
-- 
----------------------------------------------------------------------------
  Michael Snoswell                         snoswell@sirius.ucs.adelaide.edu.au  
  Vision Systems Limited                   +61 8 343 0610 <- note the change
  South Australia                          "Profound and witty quote"
Newsgroups: sci.electronics
From: jgd@dixie.com (John De Armond)
Subject: Re: Dynamotors;
Date: Tue, 15 Sep 92 06:17:03 GMT
Organization: Dixie Communications Public Access.  The Mouth of the South.

frank@rover.uchicago.edu (Frank - Hardware Hacker - Borger) writes:

>>	Zone, Harlowton, Mt to Avery, ID.  At 30 mile intervals, rotary
>>	convertor substations, 2400 VAC 3 phase in, 3,000Vdc out.  (I
>>	disremember the ratings, but think of kiloamps....).  All torn out now.
>>	Or any transit system, til recently 600 VDC at thousands of amps, from
>>	the same sort of rigs.  Stood 15 feet high.

>	Near my weekend getaway shack in Wisconsin is the East Troy electric
>	interurban railway museum. 
>	Anyway, they still have on view the power converters. Although not
>	of the capacity of the above, (and obviously not being used...) they
>	still are impressive to view. 

Though technically rotary converters and not dynamotor, these machines
are fascinating.  I have a set of instruction books from the Coyne 
Electrical School in Chigaco (they still around) from about 1940 that I 
dearly cherish.  The books go back far enough to cover some really 
awe inspiring machinery.  Several story tall DC motors with brushes 
twice the size of the man standing beside it.  Some of the rotary 
converters in this book are equally impressive.  High voltage DC 
transmission was just starting to be experimented with.  Some of the 
converters that could generate several thousand volts of DC are very 
interesting.  Strange to see commutators equipped with "spark scrapers"
designed to scrape off and interrupt flashovers as they start.

By far the largest motor-generator set I've ever seen is at Browns 
Ferry Nuclear Plant.  The GE reactor design uses 4 8000 hp variable
speed pumps to control reactor power by sweeping steam voids from the
core at variable rates.  These motors (32,000 hp in all) are driven
by ONE motor-generator set with a scoop-tube torque converter coupling
them.  The converter serves as the variable speed coupling.  The most
amazing part is they start this huge motor across the line (Flickering
lights?  We don't have no steenking flickering lights.  We're the 
power company.)   Being in the gallery when that sucker is started makes
you think you have gone to electricity hell.

I still think I have the mother of all dynamotors. :-)

John
-- 
John De Armond, WD4OQC               |Interested in high performance mobility?  
Performance Engineering Magazine (TM) |
Marietta, Ga                         |Interested in high tech and computers? 
jgd@dixie.com                        |Write me about PE Magazine
Need Usenet public Access in Atlanta?  Write Me for info on Dixie.com.
Newsgroups: sci.electronics
From: walvdrk_r@research.ptt.nl (Kees van der Wal)
Subject: Re: BCD-binary conversion
Organization: PTT Research, The Netherlands
Date: Sat, 12 Sep 1992 13:02:51 GMT

In article <1272@eplunix.UUCP>, raoul@eplunix.UUCP (Nico Garcia) writes:

> Hi. I have a panel display of BCD thumbwheels I'd like to decipher into
> binary: 4 or 5 decades of BCD to 12 or 16 bits of binary.  TI used to ...

Five decades would be tricky as the maximum of (decimal) 99999 exceeds the 
16-bit limit.

A standard approach uses a large number of Full Adders where e.g. the ouputs of 
the decades are wired accoring to the "weight" of the code. E.g. for the second 
decade the weight is 10, 20, 40, 80 respectively or 8+2, 16+4, 32+8 and 64+16.

Is that the approach that leads to 11 chips?

With 4 decades there's 4*4=16 inputs and 16 bits of output such it could be
done by taking two standard 64KB EPROMs. Writing a program for the code in the 
EPROMs is rather straightforward.

Succes, <kees>

Kees  van der Wal		       e-mail: J.C.vanderWal@research.ptt.nl
From: vwass@sdcc13.ucsd.edu (Vincent Wass)
Newsgroups: sci.electronics
Subject: pc based oscilloscopes
Date: 11 Sep 92 22:55:17 GMT
Distribution: usa
Organization: University of California, San Diego


I am just about to make the plunge and buy myself an oscilloscope.
I have a pc, and I saw and add for Chase Scientific
pc-oscilloscopes in Radio Electronics magazine.  I would immensely
appreciate any information on pc oscilloscopes vs. normal
oscilloscopes.  My price range is around the $650 range.

Here are some specs from the article for a 60MHz version CS60-25:
Price:				$695
Bandwidth:	
  Repetitive (-3db): 		60MHz
  single shot:			6.2MHz
Max. Digitizing:
  2 channels simultaneous:	25Ms/sec
Number of Channels:		2 (+1 external trigger/enable)
Time base Range:		50ns-2sec /div
Max time resolution:		400 ps
Vertical Resolution:		+/-4% (8-bit a/d)
Memory:				8k words
10mV/div - 10V/div input
Sensitivity in 1, 2, 5 steps (20pF, 1Mohm)