HDTenEightyP/NetNews huggingface dataset:
From: kilian@cray.com (Alan Kilian)
Newsgroups: sci.electronics
Subject: Re: HC-11 BPROT programming
Date: 12 Nov 92 20:33:39 GMT
Organization: Cray Research, Inc.


In the M68HC11 Reference Manual (The purple book) Page 4-10
Discussing EEPROM programming and the BPROT register:

"A user can write these bits to zero to enable programming and erase
 operations, but this write must be performed within 64 cycles after
 reset."


So I guess that you have to setup the reset vector to point to a routine
that writes the BPROT register and then jumps to BUFFALO or wherever
you like.


              Good luck,
                   -Alan Kilian


-- 
 -Alan Kilian           kilian@cray.com 612.683.5499 (Work) 612.721.3990 (Home)
  Cray Research, Inc.   655 F Lone Oak Drive, Eagan  MN, 55121 
                        "It's based on actual math". -Dilbert
Newsgroups: sci.electronics
From: rrh@cbnewsk.cb.att.com (richard.w.heebner)
Subject: Re: Adding a Second Phone Line
Organization: AT&T Bell Labs, Princeton, NJ
Date: Thu, 5 Nov 1992 16:58:50 GMT

From article <Bx8C3s.C70@news.cso.uiuc.edu>, by cathy@uxa.cso.uiuc.edu (Catherine T Vojtas):
> I need to install a second line so I can have one for voice, one for data
> (can you guess why?)  The installation charge for the labor of putting in
> a second phone line is a bit pricey, but the woman at Illinois Bell told 
> me that I could do it myself if I knew how...
> Anyone know how this is done?  I have some background in basic 
> electronics(simple stuff like building a rectifier, etc...) but I think
> I could handle it.
> Any help would be greatly appreciated..
> Thanks.
> 
> -- 
> ----------------------------------------------------------------------------
> Catherine Vojtas                        mail to: cathy@uxa.cso.uiuc.edu
> University of Illinois at U-C
> ----------------------------------------------------------------------------
I think the person you talked with at Illinois Bell misunderstood
what you wanted. If you want to be able to use voice and data at
the same time there must be two separate phone lines coming into
the building.
The only way to have two separate telephone lines is to pay whatever
the local telephone charges. Some money can be saved by doing the
in-house wiring yourself.
Newsgroups: sci.electronics
From: pvr@wang.com ()
Subject: Re: PC board manufacture: my technique
Organization: Wang Labs, Lowell MA, USA
Date: Mon, 9 Nov 1992 15:55:11 GMT

johnh@macadam.mpce.mq.edu.au (John Haddy) writes:


>> 	I have made a number of small boards up to 2 by 4.5 inches
>> using this process and some with very fine traces and spacings.
>> I complete the etching of one side before I apply the toner
>> to the other side.   I don't know it this process will scale up to 
>> larger sizes well.   It seems to me that the steam step is 
>> particularly important.   Before I did this traces would pull off at 
>> the edges of the board as the board cooled.
>	

>This process is unlikely to scale much _because_ of the steam step. The
>paper will swell and hence dimensional accuracy will not be maintained.

	The point at which you drive the steam into the paper is
after the toner has melted onto the pc board.   The temperature
of the steam is below the melting point of the toner.   The paper
swelling will not effect the dimensional accuracy at this point.

>Our laser printers print accurately onto the paper _before_ it hits the
>fuser section. Because of the inherent sizing distortion caused by the
>heat cycle in the printer, we need to let the paper (or mylar, more
>usually) "rest" for an hour or two before proceeding to the next step.

>I've noticed about a 1-2% error in sizing when the paper first comes out
>of the printer (this is serious for big components, such as edge
>connectors or DIN41612 plugs and sockets). The paper restores its
>dimensions as it rests.

	I had not noticied this but I am working with smaller
boards.
--
>>>>>>>>>>>> Peter Reilley ..... pvr@wiis.wang.com ..... KA1LAT <<<<<<<<<<<<<
                     Well, that about says it.
From: ortiz@austin.lockheed.com (Joe Ortiz)
Newsgroups: sci.electronics
Subject: Can I connect a Sony GDM-1950/18 Sparc monitor to a PC w/SVGA?
Summary: Can I connect a Sony GDM-1950/18 Sparc monitor to a PC w/SVGA?
Keywords: Sony,GDM-1950,SVGA,monitor
Date: 10 Nov 92 22:33:23 GMT


  Anybody out there have any ideas on how to connect a 
  Sony GDM-1950/18 SPARC 19" color monitor with a 13w3 female connector
  to a PC with a Super VGA card?

  I've found a 13w3 to 4-BNC adapter (Red,Green,Blue,Sync) but I
  am wondering what might be the best way to take that to a PC VGA input.
  I can get a 4-BNC to PGA cable and a 9-pin to 15-pin adapter might that
  work?  Do I need to combine the H-sync and V-sync coming from the VGA card?

  Is there a way to alter the sync characteristics of the monitor to
  sync with the VGA?

  The monitor specs I have say that the monitor is:

	Resolution:	1280x1024	or	1024x768
	Deflection
	  on freq.
	Horizontal:	63.34KHz		48.8 KHz
	  Vertical:	59.98Hz			60.0 Hz

  The VGA card I have is supposed to be able to do 1024x768 non-interlaced
  at a Vertical sync of 60.0- Hz and a Horizontal sync of 48.37- KHz.

  Thanks in advance for any help that you can offer.

  Please reply via e-mail if possible to ortiz@austin.lockheed.com.


-- 
ortiz@austin.lockheed.com
From: hattori@convex.com (Mato Hattori)
Newsgroups: sci.electronics
Subject: Questions about NiH Battery? PADS? (I'm new in this group)
Date: 5 Nov 92 19:39:21 GMT
Organization: Engineering, CONVEX Computer Corp., Richardson, Tx., USA
X-Disclaimer: This message was written by a user at CONVEX Computer
              Corp. The opinions expressed are those of the user and
              not necessarily those of CONVEX.


Hi,  This is first time to read this group.  I didn't aware of this group.
I'm so glad to be able to find such interesting group.  I've been enjoying
electronics handicraft since I was Junior High school students.  I have 15 
years of experience about hobby electronics.  I hope I can help you in some
way.  At this time, could some one teach me about following two subjects?

	1.  I'm not familiar with Nickel Hydrogen Battery.  
	    How does it different from Nickel Cadmium Battwry?

	2.  Recently, I'm planning to have a PCB design tool with my PC.
	    I happenly found articles about PADS in this group.
	    Where can I download the PADS Demos?  Which ftp site?


Thanks in advence.
--
Mato Hattori                  email: hattori@convex.com
Convex Computer, U.S.A.              (or hattori@csrd.nkk.co.jp)
3000 Waterview Parkway        office: 1+214-497-4304
Richardson, Texas 75083       home:   1+214-424-4655
From: v064mcqs@ubvmsb.cc.buffalo.edu (NEIL GANDLER)
Newsgroups: sci.electronics
Subject: Project Cases suppliers?
Date: 11 Nov 92 23:45:00 GMT
Organization: University at Buffalo
News-Software: VAX/VMS VNEWS 1.41


 I am planning to manufacture a small product in the near future
and need a source for plain black or blue ABS plastic cases that
measure around 6 x 2.5 x 1/16 . Radio shack a decent one that was
$2.29 a piece. The best price they can give me is 1.71 in lots of a
hundred. I only need around 30 and am hoping to get them less than that.
I would appreciate any help.

	
		Neil Gandler
Newsgroups: sci.electronics
From: 35002_3770@uwovax.uwo.ca
Subject: Keypad /w display - manufacturers?
Organization: University of Western Ont, London
Date: Thu, 12 Nov 1992 03:43:03 GMT

Hello all, I am looking for a few names of manufacturers of compact keypads 
with LCD displays - something along the lines of what Casio uses in their
little databank units.  I want to stay away from spring/bubble type
switches, individual keys with a clean/crisp feel is what I am looking
for.  If the companies were located in North America, that would be even
better.
 
 The application would be wall mounted, not portable. 
 
 Thanks for any help...

Newsgroups: sci.electronics
From: furman@leland.Stanford.EDU (Elliot M Furman)
Subject: Compiler for 68HC11
Organization: DSG, Stanford University, CA 94305, USA
Date: Fri, 13 Nov 92 02:07:07 GMT


Does anyone out there have a decent compiler (preferably
C but assembly is OK) for the Motorola MC68HC11?

It doesn't make a difference if it runs under DOS or Windows. 

If you do, please send e-mail to me at
(and/or send the zipped files to me)
 
furman@leland.stanford.edu

Thanks in advance,

Elliot


Newsgroups: sci.electronics
From: abond@rvgs.vak12ed.edu (Andrew H. Bond)
Subject: Wanted: Good Used Oscilliscope
Organization: Virginia's Public Education Network (Roanoke)
Date: Sun, 08 Nov 92 05:55:51 GMT

	I am in the market for a good used oscilliscope(I would
prefer a Tek 546 series or something similar as I have the
manuals for these) I would be willing to pay around $100 plus
shipping, However any reasonable offer will be considered.

	send e-mail to: abond@rvgs.vak12ed.edu
	or phone (703) 586-6166
-- 
andrew h bond, 	rvgs
From: markey@flash.ATC.Olivetti.Com (Tim Markey)
Newsgroups: sci.electronics
Subject: Radio Electronics BBS
Keywords: RE-BBS
Date: 12 Nov 92 18:14:58 GMT


     I am having trouble logging on to Radio Electronics BBS (516-293
     -2283 8N1 1200/2400).  I do receive the CONNECT signal, but after
     that there is no message or login.  I know my modem work because
     I just used it to call another BBS.  I really need to get a zip 
     file off this BBS.  Any suggestions would be geratly appreciated.

     Tim Markey
From: sehari@iastate.edu (Babak Sehari)
Newsgroups: sci.electronics
Subject: Re: 12 V -> 3V, 0.6 A
Date: 9 Nov 92 03:42:02 GMT
Organization: Iowa State University of Science and Technology, Ames, Iowa.
Originator: sehari@class1.iastate.edu

In <1992Nov7.141550.538@ludd.luth.se> d89-ahg@ludd.luth.se (Anders Hedberg) writes:

>A friend wants to listen to his CD player powered from the car.

>The CD-player wanna have 3Volts at max 600 mA, and the car has a battery
>of 12 volts.

>I thought of a LM317 or something similar, but I've never designed something
>alike, and I need to know how to calculate the resistor values.

>/Anders Hedberg

There are many ways to do this the cheapest way is to put:

  12-3
--------- = 13 diodes in series with the input voltage of your CD player,
    0.7

Like this:

+12V -|>|-|>|-|>|-|>|-|>|-|>|-|>|-|>|-|>|-|>|-|>|-|>|- +3V
GRD  --------------------------------------------------

The problem might be generated if the input voltage swings.  To avoid
this problem try putting a 2N3055 transistor as follows:

+12V |>|-|>|-|>|-|>|-|>|-|>|-|>|-|>|-|>|-    ---+3V
                                        | \_/ Emitter
                                        R  |
                                        |--|
                                        |
                                        ||>|-|>|-|>|-|>|-|>|-|
                                                             |
GRD ---------------------------------------------------------+-----
                                    

R=1000 ohm
Trans=2n3055
Diodes= 1N4001 or 1N4005

                         With highest regards,
                              Babak   Sehari.
-- 
Newsgroups: sci.electronics
From: mcovingt@aisun3.ai.uga.edu (Michael Covington)
Subject: Re: Tube primer?
Organization: AI Programs, University of Georgia, Athens
Date: Mon, 9 Nov 1992 03:29:42 GMT

In article <1992Nov06.234842.190001@zeus.calpoly.edu> mruddick@joule.elee.calpoly.edu (Michael Ruddick) writes:
>Does anyone have any good references for a book that would serve as a primer
>about how tubes work, and especially their application in both preamp
>and power-amp sections of musical instrument amps?

My favorite general book about tube electronics is ELECTRONICS FOR SCIENTISTS,
by Malmstadt, Enke, and Toren (circa 1960).

There is also a lot of info. on tubes in THE RADIO AMATEUR'S HANDBOOK since
high-powered RF gear still uses tubes.

-- 
:-  Michael A. Covington     internet mcovingt@uga.cc.uga.edu 
:-  Artificial Intelligence Programs       phone 706 542-0358
:-  The University of Georgia                fax 706 542-0349
:-  Athens, Georgia 30602-7415 U.S.A.     amateur radio N4TMI
From: M.Griesser@ee.surrey.ac.uk (Michael Griesser)
Newsgroups: sci.electronics
Subject: British sound with German TV
Keywords: TV, Philips
Date: 9 Nov 92 11:07:56 GMT
Organization: University of Surrey, Guildford, England

Hello !

I've got a Philips TV-Tuner connected to my computer monitor.
It's a German type, and when I brought it to England I noticed,
that it wasn't able to receive sound here. I think, there's
another distance between picture and sound signals here than
elsewhere.
Is it possible to get the sound by minor changes ? The tuner
component is a UV417, the sound decoder is a TBA120SQ.

Thanks for any advice.

Ciao   Michael

---------------------------------------------------------------------
Michael Griesser                     m.griesser@ee.surrey.ac.uk
University of Surrey                 phone ++44 483 300 800 ext. 2274
Guildford, GB                        fax   ++44 483 34139
From: vbreault@rinhp750.gmr.com (Val Breault)
Newsgroups: sci.electronics
Subject: Re: Big Brother Radio Shack
Date: 10 Nov 92 21:39:55 GMT
Organization: General Motors Research Labs
In-reply-to: bew@brahms.udel.edu's message of 7 Nov 92 05:35:44 GMT

In article <BxBzJK.BqK@news.udel.edu> bew@brahms.udel.edu (Ben Williams) writes:

   I've just read this thread containing 50+ complaints about Radio Shack.
   What I would like to know is:  Why do we have to shop at RS to get
   electronic supplies?  Why aren't there other electronic stores in
   competition with RS?  Well, maybe there are in your area (let me know)
   but where I live they are the only thing going.  And boy is that ever
   frustrating!  Aren't there laws about monopolies?  Aren't we living under
   a competitive free-market economy where stores that customers do not like
   to go to will be competed with by other stores?  Isn't that the way it's
   supposed to work?  I mean, RS does seem to usually have what I am looking
   for, but I still would like the option at least to do business elsewhere.
   You know, like maybe an electronics store where the salesmen know what
   they are talking about...

Three things Ben.

First: For all its warts, our free market system is still top notch
when it comes to matching up a supplier to a demand.  Cripe!  I've
even seen people do well by creating a demand AFTER they've set up
business.  Now, since there aren't a large number of suppliers, I reason
that it's because there is so little demand.  This isn't 1959 anymore.
People aren't as interested in electronic construction as they used
to be.  If you think differently then go out and raise the capital
to start your own electronics hobbiest supply shop.  Go head to head
with Radio Shack.  Expand into other cities, other states.  People
will talk fondly of you in the same spirit as they do about Ray Crock.
(founder of McDonalds).

Second:  If you're looking to provide your customers with the kind
of top notch technical support that you envision then you'll have
to make a ton of profit off that handfull of components that your
salesman sells.  Highly qualified individuals with a technical
background won't consider working for less than premium wages.
If you plan to run your business as a charitable organization then
this point may not matter.  Otherwise consider how much you'll have
to make off those 10 or 20 minute consultations.  Depending upon
your inventory, rent and pay scale, you may be able to get by grossing 
as little as $70 per hour per employee.  

Third:  Fact of life...  After getting their free technical answers
at your store, be prepared to see your customers filling their parts
needs via mail order or at the Radio Shack across the street.

Retail sales is a cruelly demanding business Ben.  

-val-
--

Val Breault - GM Research - vbreault@gmr.com - N8OEF
Instrumentation dept., 30500 Mound Rd., Warren, MI 48090-9055
The opinions expressed by the author do not necessarily reflect 
those of GMR or those of the General Motors Corporation.
 

Newsgroups: sci.electronics
From: yves@speedy.dev.cdx.mot.com (Yves Vidal)
Subject: Where to get EASYTRAX V2.06
Organization: Motorola Codex, Canton, MA
Date: Thu, 5 Nov 1992 14:15:35 GMT
Keywords: Easytrax      

Sami, 

you can get EASYTRAX free by calling PROTEL in the USA
at 1-800-544-4186 (free) or from Europe at 408-281-5858 (toll)
or 408-225-1863 (FAX). Do not forget to ask for their EASYTRAX
demo diskette on windows : it is superb, and your call will 
look more serious....

Good luck.
Yves


Newsgroups: sci.electronics
From: schuch@phx.mcd.mot.com (John Schuch)
Subject: Re: Touchtone Phone
Organization: Motorola Computer Group, Tempe, Az.
Date: Thu, 5 Nov 1992 14:30:03 GMT

In article <1992Nov3.033724.26351@msdrl.com> karkan@msdrl.com (Jim Karkanias) writes:
>I would like to be able to dial into a PC from a touchtone phone, wade through
>a menu or two ("...press 1 for ..., 2 for ...), and THEN have my keystrokes
>(buttonstrokes?) from the phone saved to some sort of file on the PC for later
>processing (e.g. the file could contain ASCII 14325 or whatever was pressed,
>etc.).  The whole thing could be terminated by a pound sign or hang-up, etc.
>(upon which any files which were opened would be closed, etc.)
>
>Anyone know how to do this??  Thank you.
>

Do you want to build it or buy it?

John
From: whit@carson.u.washington.edu (John Whitmore)
Newsgroups: sci.electronics
Subject: Re: Terminal keyboard keys quit working - any recourse?
Keywords: Terminals, keyboards, keys, do-it-yourself
Date: 9 Nov 92 22:55:19 GMT
Article-I.D.: u.1992Nov9.225519.15443
Organization: University of Washington, Seattle

In article <1992Nov8.215943.3943@beaver.cs.washington.edu> jon@cs.washington.edu (Jon Jacky) writes:
>I have a Heathkit H29 terminal I built from a kit eight or nine years ago.
>It's been working great all this time, but just recently it has developed
>a problem.   The keyboard keys have begun to go dead, one by one.

>Does anyone have any advice for what to do about this  (other than the obvious
>advice of getting a new terminal).   I recall a thread a while ago about
>putting things in dishwashers ...

        If the keyboard is similar to that of the H19s, you can
construct (or purchase) a keycap puller and pull off the offending
keycaps.  Looking straight down into the keyboard, you will see
the contact fingers, and working the mechanism you will see the
plunger operates a gate that pushes the contacts apart UNTIL you
depress the key.

        So, depress the key, and wipe the contacts (gently) with
a lintless swab, possibly with some solvent.  Blotter paper
dipped in methanol would work.

        Alternately, turn the keyboard upside down and spray
your favorite contact cleaner/enhancer into the key.  You
want the excess to drip out, of course (which generally
means that dishwasher-treatment is contraindicated).

        John Whitmore
Newsgroups: sci.electronics
From: ornitz@kodak.kodak.com (Barry Ornitz)
Subject: Re: IC to isolate device from telephone line?
Followup-To: sci.electronics
Keywords: FCC, certification, Part 68
Organization: Eastman Chemical Company
Distribution: net
Date: Sat, 7 Nov 92 00:58:39 GMT

In article <1992Nov4.191447.16186@krfiny.uucp> jeffj@krfiny.uucp 
(J. Jonas) writes:
>In article <1992Nov3.234141.6903@kodak.kodak.com> ornitz@kodak.kodak.com
>	(Barry Ornitz) writes:
>>There are modules made by companies like Cermetek that SIMPLIFY getting Part
>>68 certification but they do NOT eliminate the process.  Face the fact that
>>anything connected to the telephone lines directly must be certified.
>
>Huh?  I read in the Cermetek DAA data sheets that the FCC part 68
>certification was transferrable to whatever equipment used
>the DAA for the phone interface.

I decided to check the latest data sheets from Cermetek in our VSMF microfilm
library.  It seems Jeff and I are both right.

Cermetek makes a few DAA modules (Data Access Arrangements) that carry Part 68
pre-approvals that convey FCC Part 68 approvals to the devices they are used
in.  Cermetek suggests the use of these DAA's to minimize registration delays
and get your product to market quickly.  These particular DAA's are expensive,
however, and they suggest that they be replaced by other units they manufacture
in your final FCC tested and approved design.  These other units conform to
the FCC Part 68 standards but still require registration.

From: cgordon@vpnet.chi.il.us (gordon hlavenka)

+++Try Cermetek at +1-408-752-5000.  I've used a device called the CH1812
+++which provides part 68 certification.  It also includes the hybrid,
+++incoming ring detect, and offhook circuitry -- these features are a
+++side-effect of the certification requirements.  The module actually
+++comes with a sticker you attach to the outside of your finished
+++product.

According the the microfilm literature (which might be out of date), the 
CH1812A does not provide pre-approval.  This is sad since this is the model
that has shown up at hamfests for well less than $1.  The Ch1810, CH1811, and 
CH1832 are the models that are pre-registered.  The Ch1812A, 13, 15, 16, and 18
are subsets that CONFORM to FCC Part 68 - but still require registration.

I broke open the potting on a CH1812A and found that it was rather complex
inside.  I doubt if any single chip solution can provide the performance,
surge protection, and isolation that these modules can provide.  It is too
bad that they cost far more than most inexpensive modems in small quantities.

					Barry
 -----------------
|  ___  ________  |       Dr. Barry L. Ornitz          WA4VZQ
| |  / /        | |       Eastman Kodak Company
| | / /         | |       Eastman Chemical Company Research Laboratories
| |< < K O D A K| |       Process Instrumentation Research Laboratory
| | \ \         | |       P. O. Box 1972, Building 167B
| |__\ \________| |       Kingsport, TN  37662       615/229-4904
|                 |       INTERNET:   ornitz@kodak.com
 -----------------
Newsgroups: sci.electronics
From: mjcol@dcs.warwick.ac.uk (Mark James Collier)
Subject: Request for information about the 6502 microprocessor
Organization: Department of Computer Science, Warwick University, England
Date: Fri, 13 Nov 1992 13:58:20 GMT

Does anybody know how I can get as much information as exists about the
6502 microprocessor? For my third year project I am emulating the 6502 at the
cycle level, ie via its internal registers. Thus I need to know information
not normally included in programming texts. Can anybody recommend a book
(eg what is Rodney Zak's 'Programming the 6502' like?) or provide an e-mail
address for RockWell (or the designers of the chip, if not them)?

Thanks in advance

Mark Collier

mjcol@dcs.warwick.ac.uk
Newsgroups: sci.electronics
From: peterlew@bnr.ca (Peter Lew)
Subject: Re: need a pulse stretcher
Reply-To: peterlew@bnr.ca (Peter Lew)
Organization: Bell-Northern Research Ltd.
Date: Wed, 11 Nov 92 15:29:48 GMT

In article <1689B137CE.X1FT@VM1.CC.UAKRON.EDU>, X1FT@VM1.CC.UAKRON.EDU writes:
|> Greetings,
|>  
|> I am in need of a simple circuit to stretch a pulse
|> that runs on 12v that acts like a 74123 (CMOS maybe?).  Thanks!
|>                                                            - Frank

Try a 555 timer, they're everywhere, cheap as sin and can do exactly what
you want.


                  O 
                // |       IP ADDRESS STILL UNDER CONSTRUCTION.
()__          /-/  |       NORMAL ROAD RESTRICTION IN EFFECT.
--- |       /--/   |          
___|| _   /---/   -o-
  -| L(o)/__|/o  |   |
   |___ _____/_  | I |  --- --- --- --- --- --- --- --- --- ---
__//   \      ]  |   | |   |   |   |   |   |   |   |   |   |   |
--|  O  |-----]   ---  | P |   | A | D | D | R | E | S | S | ? |
___\___/_______________|___|___|___|___|___|___|___|___|___|___|


                               |
Peter Lew                      | What I say is mine...
Bell Northern Research         | What BNR says, I won't repeat!
Ottawa, Ontario, Canada, eh?   |
----------------------------------------------------------------