Hello,

At this prices I will probably hook an old PC offline to the USB
system, blowing that one up will be far cheaper than the isolation
products currently on the market... :-(

Thank you for all your help

Jan



Organization:    The Designer-III Company http://www.designer-iii.com/
To:              chipdir-l@yahoogroups.com
From:            Bob Paddock <bob.paddock@...>
Date sent:       Fri, 27 Apr 2007 18:59:11 -0400
Subject:         Re: USB port isolation
Send reply to:   chipdir-l@yahoogroups.com

> On Friday 20 April 2007 04:05, Jan Wuesten wrote:
>
> > anybody knowing a quick and easy to implement electrical isolation
> > interface USB to USB ?
>
>
> This was in EEPN today
> http://www.eepn.com :
>
> "Isolated USB Hub Includes Unique Locking Connectors
>  Providing 1.5 kVac of optical isolation, the SeaI/O-270U 7-port USB 1.1/2.0
hub employs the company's patent-pending
> SeaLATCH locking USB connectors to prevent accidental cable disconnection of
both the upstream and downstream ports.
> Status LEDs on the hub indicate external power, connection to the host, and
fault conditions. The entire unit comes in a
> metal enclosure and each of the downstream ports provides 500 mA of power for
all USB peripherals.
> Operating temperature range is from 0°C to +70°C with an extended temperature
range -40°C to +85°C
> unit available as a special order. Prices start at $379 each. SEALEVEL SYSTEMS
INC., Liberty, SC. (864) 843-4343."
>
> http://www.sealevel.com/
>
> --
>                 http://www.wearablesmartsensors.com/
>  http://www.softwaresafety.net/ http://www.designer-iii.com/
>                  http://www.unusualresearch.com/
>



Mit freundlichen Gruessen---best regards----cordialement

Dipl.-Ing. Jan Philipp Wuesten

Frag'Jan zuerst - Ask Jan First GmbH & Co. KG
Preiler Ring 10 ; D- 25774 Lehe, Germany
Phone: +49-4882-6054551  Fax  : +49-4882-6054552
<http://www.die-wuestens.de> (Deutsch, English, Francais)
mail to <FJZ@...>  or <FJZ@...>
HR A4788 PI, Vertretung: Wüsten Verw.GmbH, HR B 6295 PI
Registergericht Pinneberg. GF: Jan Wüsten
**************************************************
Aktuelle Info: Abonnieren Sie unseren Newsletter
Stay updated: Subscribe to our newsletter:
Restez en ligne: Abonnez-vous à notre courriel de nouvelles:

Info: <http://www.wuesten.net/news.htm>
**************************************************

On Friday 20 April 2007 04:05, Jan Wuesten wrote:

> anybody knowing a quick and easy to implement electrical isolation
> interface USB to USB ?


This was in EEPN today
http://www.eepn.com :

"Isolated USB Hub Includes Unique Locking Connectors
  Providing 1.5 kVac of optical isolation, the SeaI/O-270U 7-port USB 1.1/2.0 hub
employs the company's patent-pending
SeaLATCH locking USB connectors to prevent accidental cable disconnection of
both the upstream and downstream ports.
Status LEDs on the hub indicate external power, connection to the host, and
fault conditions. The entire unit comes in a
metal enclosure and each of the downstream ports provides 500 mA of power for
all USB peripherals.
Operating temperature range is from 0°C to +70°C with an extended temperature
range -40°C to +85°C
unit available as a special order. Prices start at $379 each. SEALEVEL SYSTEMS
INC., Liberty, SC. (864) 843-4343."

http://www.sealevel.com/

--
                 http://www.wearablesmartsensors.com/
  http://www.softwaresafety.net/ http://www.designer-iii.com/
                  http://www.unusualresearch.com/

And the Meilhaus ones are USB 1.1, I need USB 2... :-((
So far no helpful ideas..

Jan



Mit freundlichen Gruessen---best regards----cordialement

Dipl.-Ing. Jan Philipp Wuesten

Frag'Jan zuerst - Ask Jan First GmbH & Co. KG
Preiler Ring 10 ; D- 25774 Lehe, Germany
Phone: +49-4882-6054551  Fax  : +49-4882-6054552
<http://www.die-wuestens.de> (Deutsch, English, Francais)
mail to <FJZ@...>  or <FJZ@...>
HR A4788 PI, Vertretung: Wüsten Verw.GmbH, HR B 6295 PI
Registergericht Pinneberg. GF: Jan Wüsten
**************************************************
Aktuelle Info: Abonnieren Sie unseren Newsletter
Stay updated: Subscribe to our newsletter:
Restez en ligne: Abonnez-vous à notre courriel de nouvelles:

Info: <http://www.wuesten.net/news.htm>
**************************************************

> e.g.
>
> http://www.meilhaus.de/produkte/usb-mobile-
> messtechnik/?user_produkte%5BPATTR%5D=HPG_3-UPG1_10-
> UPG2_44&user_produkte%5BPR%5D=93&cHash=84fc769a2d
>
> 2 expensive?
>

far 2...




Mit freundlichen Gruessen---best regards----cordialement

Dipl.-Ing. Jan Philipp Wuesten

Frag'Jan zuerst - Ask Jan First GmbH & Co. KG
Preiler Ring 10 ; D- 25774 Lehe, Germany
Phone: +49-4882-6054551  Fax  : +49-4882-6054552
<http://www.die-wuestens.de> (Deutsch, English, Francais)
mail to <FJZ@...>  or <FJZ@...>
HR A4788 PI, Vertretung: Wüsten Verw.GmbH, HR B 6295 PI
Registergericht Pinneberg. GF: Jan Wüsten
**************************************************
Aktuelle Info: Abonnieren Sie unseren Newsletter
Stay updated: Subscribe to our newsletter:
Restez en ligne: Abonnez-vous à notre courriel de nouvelles:

Info: <http://www.wuesten.net/news.htm>
**************************************************

sorry i can't tell you how to connect. i just gave the basic  idea to you.
thanks



   ----- Original Message -----
   From: Declan Moriarty
   To: chipdir-l@yahoogroups.com
   Sent: Friday, April 20, 2007 9:43 PM
   Subject: Re: USB port isolation


   On Fri, 2007-04-20 at 19:38 +0600, someone wrote:
   > YOU CAN TRY WITH OPTO ISOLATORS.

   > Hello,
   >
   > anybody knowing a quick and easy to implement electrical isolation
   > interface USB to USB ?
   >
   > I have some industrial gear here I do not want to connect
   > galvanically to my computer network

   Usb-1.0 or usb-2.0?

   You might do opto isolators for slow usb speeds, but you didn't email us
   because you didn't know that, Jan. I take it you're worried about power
   surges or performance.

   Can you cobble something with fibre optics? The other thing is to look
   at usb networking arrangements. I've never done it, but are those setups
   really one-surge-blows-all?
   >

   >
   --
   Declan Moriarty <junk_mail@...>






------------------------------------------------------------------------------


   No virus found in this incoming message.
   Checked by AVG Free Edition.
   Version: 7.5.446 / Virus Database: 269.5.5/769 - Release Date: 4/19/2007 5:56
PM


[Non-text portions of this message have been removed]

e.g.

http://www.meilhaus.de/produkte/usb-mobile-
messtechnik/?user_produkte%5BPATTR%5D=HPG_3-UPG1_10-
UPG2_44&user_produkte%5BPR%5D=93&cHash=84fc769a2d

2 expensive?

Alois

-------------- Original message ---------------
Hello,

anybody knowing a quick and easy to implement electrical isolation
interface USB to USB ?

I have some industrial gear here I do not want to connect
galvanically to my computer network

Thank you

Jan

Mit freundlichen Gruessen---best regards----cordialement

Dipl.-Ing. Jan Philipp Wuesten

Frag'Jan zuerst - Ask Jan First GmbH & Co. KG
Preiler Ring 10 ; D- 25774 Lehe, Germany
Phone: +49-4882-6054551 Fax : +49-4882-6054552
<http://www.die-wuestens.de> (Deutsch, English, Francais)
mail to <FJZ@...> or <FJZ@...>
HR A4788 PI, Vertretung: Wüsten Verw.GmbH, HR B 6295 PI
Registergericht Pinneberg. GF: Jan Wüsten
**************************************************
Aktuelle Info: Abonnieren Sie unseren Newsletter
Stay updated: Subscribe to our newsletter:
Restez en ligne: Abonnez-vous à notre courriel de nouvelles:

Info: <http://www.wuesten.net/news.htm>
**************************************************


  -- Alois Bauer, WORK Microwave GmbH
-- Raiffeisenstr. 12, D-83607 Holzkirchen, Germany
-- Tel. {+49} (0)8024-6408-0  / FAX (0)8024-640840
-- aba@...
--  Geschäftsführer: Dipl.-Ing. (Univ.) Hans Brunner
--  Eintragung Amtsgericht München HRB-Nr. 79479
--  USt. Nr. / VAT-ID: DE 131202911

e.g.

http://www.meilhaus.de/produkte/usb-mobile-
messtechnik/?user_produkte%5BPATTR%5D=HPG_3-UPG1_10-
UPG2_44&user_produkte%5BPR%5D=93&cHash=84fc769a2d

2 expensive?

Alois

-------------- Original message ---------------
Hello,

anybody knowing a quick and easy to implement electrical isolation
interface USB to USB ?

I have some industrial gear here I do not want to connect
galvanically to my computer network

Thank you

Jan

Mit freundlichen Gruessen---best regards----cordialement

Dipl.-Ing. Jan Philipp Wuesten

Frag'Jan zuerst - Ask Jan First GmbH & Co. KG
Preiler Ring 10 ; D- 25774 Lehe, Germany
Phone: +49-4882-6054551 Fax : +49-4882-6054552
<http://www.die-wuestens.de> (Deutsch, English, Francais)
mail to <FJZ@...> or <FJZ@...>
HR A4788 PI, Vertretung: Wüsten Verw.GmbH, HR B 6295 PI
Registergericht Pinneberg. GF: Jan Wüsten
**************************************************
Aktuelle Info: Abonnieren Sie unseren Newsletter
Stay updated: Subscribe to our newsletter:
Restez en ligne: Abonnez-vous à notre courriel de nouvelles:

Info: <http://www.wuesten.net/news.htm>
**************************************************


  -- Alois Bauer, WORK Microwave GmbH
-- Raiffeisenstr. 12, D-83607 Holzkirchen, Germany
-- Tel. {+49} (0)8024-6408-0  / FAX (0)8024-640840
-- aba@...
--  Geschäftsführer: Dipl.-Ing. (Univ.) Hans Brunner
--  Eintragung Amtsgericht München HRB-Nr. 79479
--  USt. Nr. / VAT-ID: DE 131202911

To:              chipdir-l@yahoogroups.com
From:            JAYANTHA WANIGARATNE <univak@...>
Date sent:       Fri, 20 Apr 2007 19:38:18 +0600
Subject:         Re: USB port isolation
Send reply to:   chipdir-l@yahoogroups.com

> YOU CAN TRY WITH OPTO ISOLATORS.
>

I know but no time to TRY, I need something solid proven USB 2.0 that
works without much tinkering, handy and smoth and at preferably
almost no cost.

I know, a lot of wishes....

I was hoping for some development kit at AD with their isolators
series but they seem to have nothing handy for USB.


Jan



Mit freundlichen Gruessen---best regards----cordialement

Dipl.-Ing. Jan Philipp Wuesten

Frag'Jan zuerst - Ask Jan First GmbH & Co. KG
Preiler Ring 10 ; D- 25774 Lehe, Germany
Phone: +49-4882-6054551  Fax  : +49-4882-6054552
<http://www.die-wuestens.de> (Deutsch, English, Francais)
mail to <FJZ@...>  or <FJZ@...>
HR A4788 PI, Vertretung: Wüsten Verw.GmbH, HR B 6295 PI
Registergericht Pinneberg. GF: Jan Wüsten
**************************************************
Aktuelle Info: Abonnieren Sie unseren Newsletter
Stay updated: Subscribe to our newsletter:
Restez en ligne: Abonnez-vous à notre courriel de nouvelles:

Info: <http://www.wuesten.net/news.htm>
**************************************************

On Fri, 2007-04-20 at 19:38 +0600, someone wrote:
> YOU CAN TRY WITH OPTO ISOLATORS.

> Hello,
>
> anybody knowing a quick and easy to implement electrical isolation
> interface USB to USB ?
>
> I have some industrial gear here I do not want to connect
> galvanically to my computer network

Usb-1.0 or usb-2.0?

You might do opto isolators for slow usb speeds, but you didn't email us
because you didn't know that, Jan. I take it you're worried about power
surges or performance.

Can you cobble something with fibre optics? The other thing is to look
at usb networking arrangements. I've never done it, but are those setups
really one-surge-blows-all?
>

>
--
Declan Moriarty <junk_mail@...>

YOU CAN TRY WITH OPTO ISOLATORS.



   ----- Original Message -----
   From: Jan Wuesten
   To: chipdir-L@yahoogroups.com
   Sent: Friday, April 20, 2007 2:05 PM
   Subject: USB port isolation


   Hello,

   anybody knowing a quick and easy to implement electrical isolation
   interface USB to USB ?

   I have some industrial gear here I do not want to connect
   galvanically to my computer network

   Thank you

   Jan

   Mit freundlichen Gruessen---best regards----cordialement

   Dipl.-Ing. Jan Philipp Wuesten

   Frag'Jan zuerst - Ask Jan First GmbH & Co. KG
   Preiler Ring 10 ; D- 25774 Lehe, Germany
   Phone: +49-4882-6054551 Fax : +49-4882-6054552
   <http://www.die-wuestens.de> (Deutsch, English, Francais)
   mail to <FJZ@...> or <FJZ@...>
   HR A4788 PI, Vertretung: Wüsten Verw.GmbH, HR B 6295 PI
   Registergericht Pinneberg. GF: Jan Wüsten
   **************************************************
   Aktuelle Info: Abonnieren Sie unseren Newsletter
   Stay updated: Subscribe to our newsletter:
   Restez en ligne: Abonnez-vous à notre courriel de nouvelles:

   Info: <http://www.wuesten.net/news.htm>
   **************************************************






------------------------------------------------------------------------------


   No virus found in this incoming message.
   Checked by AVG Free Edition.
   Version: 7.5.446 / Virus Database: 269.5.5/769 - Release Date: 4/19/2007 5:56
PM


[Non-text portions of this message have been removed]

Hello,

anybody knowing a quick and easy to implement electrical isolation
interface USB to USB ?

I have some industrial gear here I do not want to connect
galvanically to my computer network

Thank you

Jan



Mit freundlichen Gruessen---best regards----cordialement

Dipl.-Ing. Jan Philipp Wuesten

Frag'Jan zuerst - Ask Jan First GmbH & Co. KG
Preiler Ring 10 ; D- 25774 Lehe, Germany
Phone: +49-4882-6054551  Fax  : +49-4882-6054552
<http://www.die-wuestens.de> (Deutsch, English, Francais)
mail to <FJZ@...>  or <FJZ@...>
HR A4788 PI, Vertretung: Wüsten Verw.GmbH, HR B 6295 PI
Registergericht Pinneberg. GF: Jan Wüsten
**************************************************
Aktuelle Info: Abonnieren Sie unseren Newsletter
Stay updated: Subscribe to our newsletter:
Restez en ligne: Abonnez-vous à notre courriel de nouvelles:

Info: <http://www.wuesten.net/news.htm>
**************************************************

Chips in here are all 1996-97 era. It is a telephone
interface of some sort.
Thanks for the quick reply, been too busy to reply
back until now.

--- Declan Moriarty <junk_mail@...> wrote:

> On Tue, 2007-01-30 at 15:37 +0000, neovartan wrote:
> > QFP160, Markings are:
> >
> > 0024 Y12191E1
> > VP21911A
> > Tellabs THAWK
> > 26-9390-C
> >
> > Philips logo.
> >
> > I can provide a picture if needed...any ideas?
> Searching in the usual
> > places has yielded me no useful results.
> >
> [snip of crazy addndums to query]
>
> I'm smelling fpga. What's it in, and what's the
> surrounding batch date
> --
>         With Best Regards,
>
>         Declan Moriarty.
>
>




________________________________________________________________________________\
____
Cheap talk?
Check out Yahoo! Messenger's low PC-to-Phone call rates.
http://voice.yahoo.com

On Tue, 2007-01-30 at 15:37 +0000, neovartan wrote:
> QFP160, Markings are:
>
> 0024 Y12191E1
> VP21911A
> Tellabs THAWK
> 26-9390-C
>
> Philips logo.
>
> I can provide a picture if needed...any ideas? Searching in the usual
> places has yielded me no useful results.
>
[snip of crazy addndums to query]

I'm smelling fpga. What's it in, and what's the surrounding batch date
--
         With Best Regards,

         Declan Moriarty.

QFP160, Markings are:

0024  Y12191E1
VP21911A
Tellabs THAWK
26-9390-C

Philips logo.

I can provide a picture if needed...any ideas? Searching in the usual places has
yielded me
no useful results.

FOR IMMEDIATE RELEASE:
FROM: Northeast Surplus & Materials, LLC
440 Shonnard Street
Syracuse, NY 13204
Contact: Jim Moltion 315-476-4025

NORTHEAST SURPLUS & MATERIALS, LLC
DEVELOPS GROUNDBREAKING CIRCUIT BOARD RECYCLING SYSTEM

First-ever system of its type safely and efficiently recovers
reusable parts
and valuable metals from discarded circuit boards

Syracuse, NY electronics recycler answers U.N. call
for toxic electronics waste reduction solutions

SYRACUSE, N.Y. November 30, 2006
        Northeast Surplus & Materials, LLC, a Syracuse based Central
New York electronics recycler, has announced the completion of work
on a revolutionary new circuit board recycling system.
        The system's development comes at a time when communities
across the country are scrambling to figure out what to do about the
huge growth of electronics trash that is causing health problems and
polluting the environment. The recent release of a U.N. study
outlining the need for member countries to take actions to slow the
tide of toxic electronic devices entering landfills worldwide has
further brought the issue to the forefront, both domestically and
internationally.
        The new patent-pending system efficiently and safely recovers
reusable parts and valuable metals from discarded circuit boards.
According to Jim Moltion, Northeast president, the new
environmentally friendly, one-operator circuit board "depopulator"
system removes over 300,000 parts a week during a normal 40-hour
workweek.
        The new system uses very little energy and leaving virtually
nothing to go into landfills. "At the end of the system's two
combined processes, virtually nothing is left of the computer or
electronic device to go into the waste stream," Moltion
said. "Everything is consumed or made into reusable resources. It's
important that as few of these electronic items make it into our
landfills as possible because many contain very toxic materials.
         "Other U.S. electronics recyclers take a more labor-intensive
approach, using hotplates and hair dryers to separate these parts,
Moltion said. "That's an expensive, messy process that unnecessarily
exposes workers to toxic fumes," Moltion said.
        The development of the system was made possible through the
New York State Energy Research Development Authority (NYSERDA) in
2000 as part of its Environmental Products Development Program, which
assists in the development of products and systems designed to treat,
process, or reuse waste products using less energy in the process.
NYSERDA provided funding in the amount of more than $230,000, with
the overall project totaling more than $460,000.
        "NYSERDA has a long-standing role in developing waste and
pollution reduction projects," said Peter R. Smith, NYSERDA
president. "These programs are beneficial to private industry, as
well as communities across the state. NYSERDA's funding programs can
help companies like Northeast Surplus & Materials, LLC to develop and
market energy-efficient recycling technologies designed to address
serious waste management problems."
          The company is currently working out details with a few of
the country's largest computer manufacturers for them to buy systems
from Northeast to recover usable circuit board components using the
new system, according to Moltion. All the raw metals recovered from
the process are sold to smelters for reuse in making such items as
new electronics and jewelry.
         Investment is currently being sought for the commercial-ready
system, and the company has plans to sell or license it to others in
the worldwide recycling industry, Moltion said. The National Safety
Council estimates that over 600 million computers will be abandoned
in 2007 and that the number will grow steadily over the next few
years. To date, only about 10% of theses will be recycled. The rest
will either be put into landfills or packed into ocean containers and
shipped overseas where the recycling regulations aren't as strict as
those of this country. (See www.ban.org) Also, Recycling operations
there are permitted to use such pollutant methods as bathing circuit
boards in acid to remove gold and other metals before stripping them
off by hand, according to Moltion.
        The types of electronic equipment Northeast recycles include:
monitors, computers, printers, fax machines, typewriters, copy
machines, and other various home electronics. A complete list of
recyclable items can be found at the company Web site, located at:
www.northeast-surplus.com, along with an online quote form.
        Because of the work involved in electronics recycling, the
company charges a small fee for its services. "It's a small price to
pay to help save the environment and create jobs for the community,
however," Moltion said. But Northeast does all it can to make using
its services as easy and painless as possible, Moltion said. The
company will come to a customer's location to pick items up, if
necessary.

About Northeast Surplus & Materials, LLC
Northeast Surplus & Materials, LLC, is a Syracuse-based Central New
York electronics recycler that has been in business since 1996. For
more information, call (315) 476-4025
or visit www.northeast-surplus.com

We are looking for more work and someone to partner with us on this
new equipment. Jim Moltion - 315-476-4025

I stumbled accross this. Apparently they don't know Jaap does it.

http://ie.farnell.com/jsp/bespoke/bespoke3.jsp?bespokepage=farnell/en_IE/technic\
al_content/atoz_a.jsp
--
         With Best Regards,

         Declan Moriarty.

Hi Syd -

P&B got gobbled and know does business under the Tyco name.

Best wishes, Bob Smithd

Syd H. Levine wrote:
> I am looking for data sheets on the old Potter and Brumfield (AMF)
> SL11DA, SL11DB, SL11DC, etc. relay line, now discontinued.  I am also
> interested in the SC11Dx series as well, and any other related
> crystal can relays in the series.  My oldest P&B catalog is too new
> to list these old gems.  If anyone knows where they might be found
> online I would be eternally grateful.  If anybody has a catalog, I
> would be pleased to pay any reasonable fee for copies.
>
> Thanks in advance.
>
> Syd H. Levine
> AnaLog Services, Inc.
> Phone:  (270) 276-5671
> Telefax:  (270) 276-5588
> E-mail:  analog@...
> Web URL:  www.logwell.com
>
>
>
>
> [Non-text portions of this message have been removed]

I am looking for data sheets on the old Potter and Brumfield (AMF) SL11DA,
SL11DB, SL11DC, etc. relay line, now discontinued.  I am also interested in the
SC11Dx series as well, and any other related crystal can relays in the series. 
My oldest P&B catalog is too new to list these old gems.  If anyone knows where
they might be found online I would be eternally grateful.  If anybody has a
catalog, I would be pleased to pay any reasonable fee for copies.

Thanks in advance.

Syd H. Levine
AnaLog Services, Inc.
Phone:  (270) 276-5671
Telefax:  (270) 276-5588
E-mail:  analog@...
Web URL:  www.logwell.com




[Non-text portions of this message have been removed]

On Tue, 2006-07-11 at 05:58 +0000, semimanphx wrote:
> I have been in the semiconductor industry since 1979, and am one of
> Jaaps' earliest fans and Chip Directory advertisers. I am currently
> an independent consultant, and in recent months I have found that
> many people are trashing old hard copy data books for various
> reasons including lack of space, lack of use, moving, etc. Based on
> Jaap's suggestion, I am posting here an alternative.
>
> I am offering to "rescue" and preserve data books from any component
> family and manufacturer (1970's – 1990's). I will pay reasonable
> shipping costs for small domestic (United States) and international
> shipments, and will make pickup arrangements for any very large
> domestic collections. These books will become part of a permanent
> library to be used for historical research.
>
> Thank you for any assistance you can provide, and please contact me
> if you would like to donate any books.

I am in Dublin Ireland. Since I am closing down, you (Or anyone local
who wants them) can have everything I've got - going from a 1977
National Semi linear book, 1982/6 D.A.T.A. collection, various CDROMs, a
good selection of Siemens stuff from around 1990, and various transistor
books. Someone gets all or nothing, and sooner rather than later.
--
         With Best Regards,

         Declan Moriarty.

Please can you help us by telling how many leads and what type of case?

Harry

To:              chipdir-l@yahoogroups.com
Priority:        normal
From:            gunasuba@...
Date sent:       Sun, 16 Jul 2006 19:11:13 +0800
Subject:         Thyristor/triac?
Send reply to:   chipdir-l@yahoogroups.com

>
> Hello all,
> I don't know what it is but it is from a speed regulator board of an old
Kenwood chef mixer. No manufacturer logo, only the following:-
> 71713
> B7750
> Any help to identify it is appreciated,
>
> With best regards,
> Guna.
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>
>

On Sun, 2006-07-16 at 19:11 +0800, gunasuba@... wrote:
> Hello all, I don't know what it is but it is from a speed regulator
>  board of an old Kenwood chef mixer. No manufacturer logo, only the
>  following:- 71713 B7750 Any help to identify it is appreciated,
>
> With best regards,
> Guna.

No suggestions on the identity of the device.

If the mixer has diodes in the mains in to give it DC, your device must
be an scr. If they feed only one device with AC for a variable speed
drive, it's a triac. Presuming a TO220 or TO247 package, you will have a
leaky diode between the two outside legs on the package if it's an SCR.
The diode usually appears with the centre pin on triacs.

Replacing like with like is not such a huge issue here. Put in a high
current device rated for mains and more voltage (400V for 110VAC; 660V
for 220VAC; 800V for 240VAC).
--
         With Best Regards,

         Declan Moriarty.

Hello all,
I don't know what it is but it is from a speed regulator board of an old Kenwood
chef mixer. No manufacturer logo, only the following:-
71713
B7750
Any help to identify it is appreciated,

With best regards,
Guna.

On Tue, 2006-07-11 at 17:50 +0001, H.C.Croon wrote:
> Hi Declan,
>
> Just an idea, just by yourself wether it is useable.
>
> Car service departments does not have much knowledge of electronics.
> So, here in the Netherlands, some guys work on free lance basis for a lot of
service places
> to install and repair electronics stuff, audio, bassboosters, navigation,
phone sets and
> perhaps more. If this does not give a full time employment, it can contribute
to it.

Here, there's a different twist to the problem. There are well varnished
OEM boards in most cars these days. They're a pig to get contact on, and
fpgas behind that. You are also called when a job done is in trouble, so
the margin for profit is nil.

Light fingered mechanics prevented major dealers from fitting much in
the way of such audio kit to cars. At one stage, car radios had a ~50%
rate of pilferage in assembly plants here. So this business (along with
car alarms) has gone out to small specialist car audio people. They want
mechanics turned sparks, or sparks turned mechanic.

http://www.alarmingsounds.com

Those guys went into: car audio; car alarms; mobile phones; Junked the
lot and became the Ducati Distributor for Ireland; then went broke. But
the website is still up there. I take it he also tried a virtual
existence as a web shop.


> Your market analysis is imposing!
>

Yes. And, as soon as I had to make my mind up, I gave up the unequal
struggle and joined the idle rich who are well cared for in this State.
Paradoxically,  if I emigrated, returned, and claimed asylum, I'd
probably do better as a refugee were my claim for asylum granted :-/. I
can now fold up the business and put it away with the full support of my
wife. Doing this just after my best month all year actually means I will
get out of this fairly cleanly. And if anyone buys the Pinpoint for a
few €k, I might come out in profit.

As James Dean put it: "Tomorrow is the beginning of the rest of your
life"
--
         With Best Regards,

         Declan Moriarty.

Just to prove I'm serious about getting out of this line of work.

Before I dump my Diagnosys Pinpoint on the market, I thought I would let
people here know, in case any have an interest in it. It's a shame to
want one of these things and not be able to find one at reasonable
money.

It is
Diagnosys Pinpoint 1

Later model:
http://www.diagnosys.com/pinpoint_II.htm
www.dtic.mil/ndia/2003systems/swann.ppt

The main differences are: Test-flow software not included. The pinpoint
1 has a system for forming test routines for unknown devices and adding
them to the library. This required intelligence; So "Test-flow" was a
vain attempt to dispense with that requirement of intelligence for
operators. The pinpoint 2 also had the option to go to as many as 360
pins, while pinpoint 1 was limited to 144. The library of devices is
older. By the way, if you like the Pinpoint 2, there's a PP2 on sale
secondhand for $40,000 out there on the www. My box is cheaper (about
€10k). I can hold it a little if somebody wants it.

It has 72 pin test functions, with a 96 pin InterV3 scanner for v/i. I
have also a 96 pin diagnosys distribution box for the InterV3 card if
you want to pull the InterV3 card and use it separately.

The big plus IME over Analogue Signature analysis is that up to 20% of
chips don't show an external fault when blown, and so they pass the
analogue signature analysis (or V/I) tests, but don't work


Mail me off list if you are interested.


--
         With Best Regards,

         Declan Moriarty.

On Wed, 2006-07-12 at 21:08 +0200, Jan Wuesten wrote:
> Hello,
>
> anybody knowing a good rule of thumb on how to dimension a snubber
> network that eats up the energy released by an inductive load being
> switched off ?
>
> Background: approx 30*60 W fluorescent lamps on one phase switched
> with a solenoid.
>
> All power, light + electricity being switched by a large mains
> solenoid.
>
> What happened:
>
> Light was not switched off with it´s own solenoid but somebody hit
> the "off-all" switch, large solenoid opened, voltage surge from the
> ballast chokes was quicker than the also opening lamp relay and
> destroyed several SMPSUs from PC, monitor, battery chargers, etc,
> sometimes the fuses, sometimes the diodes, even an electrolytic
> exploded and a mains transformer was blown etc.
>
> easiest would be a varistor but I do not find one in the power
> needed.
> Those I have, 0,6 W turn black pretty quickly...
>
> To make it short, is there a rule of thumb on how to dimension a R-C-
> network to eat up the energy from the chokes ?

You can't replace that Solenoid with a Solid State Relay, and save
yourself a huge amount of sweat, could you? No snubber needed, as it
opens at zero crossing :-D.
--
         With Best Regards,

         Declan Moriarty.

On Wed, 2006-07-12 at 20:32 -0400, Bob Paddock wrote:
> On Tuesday 11 July 2006 05:51, Declan Moriarty wrote:
> > I've decided to get out of what I've been doing for 17 years over here
> > in Ireland, and casting around for my next move.
>
> I don't have any great advice for you, but want to let you know your
> not alone.  I too would like to get out.  Earlier this week the Boss Man
> at my current gig told one of my colleagues "it doesn't mater if it is
> right, just get it done!".
>
> I'm sorry but I just don't want to work like that.  If my products
> screw up people die.
[SNIP]

> There was a TV show where a fellow said that "Plumbing was
> a step up from doing computer work".  He was much happier
> as a plumber than he was doing IT.  What are the Plumbing
> and Electrical Contractor work like in your part of the world?

Cut throat. We have Polish immigrants displacing the time-served Irish
plumbers purely because they're cheaper. The Poles also have a good
'bush telegraph' to alert each other to job vacancies. I welcome them
here, but 120,000 into Dublin sure knocked the bottom out of more than
one trade.
>
> > The guy in Germany can even start the
> > motor and run up through the gears!
>
> That sounds like bad news from a safety perspective.

Very. Mind you, in the middle of a field, it's probably all right.

> > People  want certification, which means constant exams.
>
> Seems the certification that I have is never the ones that people want.

Come on, you have a degree back there in the past. Can you imagine how
many doors the lack of that closes on me?

> You do have Linux experience.  There are certifications for that.
> http://www.lpi.org/  That is one I'm working on right now.
> Anything to give my Resume an edge over the others in the rest
> of the stack.

Forget linux. Most hare want years of experience with database, apache,
or sendmail configuration as well as certification. Then you want either
php, asp, java, flash, mysql, & oracle or the other main group C, C++,
bash scripting, perl, python, awk, sendmail, apache and perhaps
databases as well.

The experience is because it can be hugely important whether you have to
reboot or not when you are live 24/7 with a huge number of connections
at any time.
.
> Anyone want to higher a very frustrated designer/programmer with
> lots of experience?  Dilbert is meant to be a cartoon,
> not a Documentary...
>

Maybe we should take up writing...
--
         With Best Regards,

         Declan Moriarty.

To:              chipdir-l@yahoogroups.com
From:            Edi Im Hof <edi.imhof.ml@...>
Date sent:       Wed, 12 Jul 2006 23:40:24 +0200
Subject:         Re: snubber network dimensioning, slightly OT
Send reply to:   chipdir-l@yahoogroups.com

> Hi Jan
>
>  From the top of my mind:
>
> Resistor:
> 220 Ohm for 230Vac
> 470 Omh for 400Vac
>
> Capacitor:
> C[uF] >= 0.1*I[A]
>
> In other words, each Ampere needs a 0.1uF
>
> I don't know whether this is true for larger loads (>1A), used this
> for loads <100W.
>

Thank you anyway, we will try it the hard way, build it in, pull out
all sensitive stuff and hit the button.

Contact fire will show the difference then ;-)

"Empirical science"

Thank you all for your quick help

Jan


mit freundlichen Gruessen---best regards----cordialement

Dipl.-Ing. Jan Philipp Wuesten

Frag'Jan zuerst - Ask Jan First GmbH & Co. KG
Preiler Ring 10 ; D- 25774 Lehe, Germany
Phone: +49-4882-6054551  Fax  : +49-4882-6054552
<http://www.die-wuestens.de> (Deutsch, English, Francais)
mail to <FJZ@...>  or <FJZ@...>

**************************************************
Aktuelle Info: Abonnieren Sie unseren Newsletter
Stay updated: Subscribe to our newsletter:
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On Tuesday 11 July 2006 05:51, Declan Moriarty wrote:
> I've decided to get out of what I've been doing for 17 years over here
> in Ireland, and casting around for my next move.

I don't have any great advice for you, but want to let you know your
not alone.  I too would like to get out.  Earlier this week the Boss Man
at my current gig told one of my colleagues "it doesn't mater if it is
right, just get it done!".

I'm sorry but I just don't want to work like that.  If my products
screw up people die.

Alas I've been in the Embedded Industry for nearly forty years,
before it was even known as the Embedded Industry.  Every boss
has had the same attitude.  "We have three customers saying
they are going to cancel orders for the units they just ordered...
When will you have them designed, built and programmed?  Work
this weekend so you can take the 3rd and 4th of July off."

Anyone here remember "The Osborn Effect"?

Our current unit that lacks fancy graphics.
They faked a fancy graphic unit for a show, now all
the orders have dried up for the old non-graphics unit.
Some how that is my fault, even after I explained
The Osborn Effect to the boss and told him the dead
end road he was about to start down, before he even
went to the show.  Now he is not happy that
our department is not working a 70 hour week, while
he is on vacation at a Beer & Wine tasting contest
with his family.

The other common boss problem is they all want to build
things like Defibrillators out of the cheapest parts.
I can use one $11 part in a system but "that cost to
much, I don't want you to use that!".  So instead
I use fifty "cheap" parts that cost ten times as much
in labor.  Alas they can measure the $11 but they
have not figured out how to measure the labor.

It is the cost of a system that is important, not
the cost of the components.  System costs properly
figure in the cost/time of labor and expensed materials.

Sorry, just had to vent my frustration someplace, figured
a lot of you here have "been there".

> That can be employment,  or self employed, I'm not fussy.

There was a TV show where a fellow said that "Plumbing was
a step up from doing computer work".  He was much happier
as a plumber than he was doing IT.  What are the Plumbing
and Electrical Contractor work like in your part of the world?

> The guy in Germany can even start the
> motor and run up through the gears!

That sounds like bad news from a safety perspective.

> People  want certification, which means constant exams.

Seems the certification that I have is never the ones that people want.
You do have Linux experience.  There are certifications for that.
http://www.lpi.org/  That is one I'm working on right now.
Anything to give my Resume an edge over the others in the rest
of the stack.

Anyone want to higher a very frustrated designer/programmer with
lots of experience?  Dilbert is meant to be a cartoon,
not a Documentary...

--
  http://www.softwaresafety.net/ http://www.designer-iii.com/
                  http://www.unusualresearch.com/

On Wednesday 12 July 2006 15:08, Jan Wuesten wrote:

> anybody knowing a good rule of thumb on how to dimension a snubber
> network that eats up the energy released by an inductive load being
> switched off ?

http://www.national.com/an/AN/AN-776.pdf

has a section on Snubber design.

You can find a rather dated paper I did for Circuit Cellar Online
years ago dealing with Snubbers at the bottom of my web site:

You need to copy&past the links into your browser since
Chip Center is no more.

http://www.designer-iii.com/



--
  http://www.softwaresafety.net/ http://www.designer-iii.com/
                  http://www.unusualresearch.com/

What a disaster!

To me it seems wise not to absorb the energy by a snubber circuit. The
fluorescent lamps
can do it by theirself and then the power is distributed over 30 of them. Place
2 power
Zeners backwards in series between line and neutral. They must have a Zener
voltage
slightly over the mains top, so above 326V. Perhaps you have to combine some
lower
voltageZeners in order to get the desired voltage. BZY91-Cxx with xx<= 75V can
dissipate
75 Watts. Doing so, the current can continue to flow only giving a peak voltage
defined by
the Zeners. A small valued series resistance can be used to protect the Zeners
from high
currents when a voltage peak comes from the mains.

Harry

Organization:    Frag Jan zuerst-Ask Jan First GmbH&Co.KG
To:              chipdir-L@yahoogroups.com
Priority:        normal
From:            "Jan Wuesten" <fjz@...>
Date sent:       Wed, 12 Jul 2006 21:08:59 +0200
Subject:         snubber network dimensioning, slightly OT
Send reply to:   chipdir-l@yahoogroups.com

> Hello,
>
> anybody knowing a good rule of thumb on how to dimension a snubber
> network that eats up the energy released by an inductive load being
> switched off ?
>
> Background: approx 30*60 W fluorescent lamps on one phase switched
> with a solenoid.
>
> All power, light + electricity being switched by a large mains
> solenoid.
>
> What happened:
>
> Light was not switched off with it´s own solenoid but somebody hit
> the "off-all" switch, large solenoid opened, voltage surge from the
> ballast chokes was quicker than the also opening lamp relay and
> destroyed several SMPSUs from PC, monitor, battery chargers, etc,
> sometimes the fuses, sometimes the diodes, even an electrolytic
> exploded and a mains transformer was blown etc.
>
> easiest would be a varistor but I do not find one in the power
> needed.
> Those I have, 0,6 W turn black pretty quickly...
>
> To make it short, is there a rule of thumb on how to dimension a R-C-
> network to eat up the energy from the chokes ?
>
> Thank you all
>
> Jan
>
>
>
>
> mit freundlichen Gruessen---best regards----cordialement
>
> Dipl.-Ing. Jan Philipp Wuesten
>
> Frag'Jan zuerst - Ask Jan First GmbH & Co. KG
> Preiler Ring 10 ; D- 25774 Lehe, Germany
> Phone: +49-4882-6054551  Fax  : +49-4882-6054552
> <http://www.die-wuestens.de> (Deutsch, English, Francais)
> mail to <FJZ@...>  or <FJZ@...>
>
> **************************************************
> Aktuelle Info: Abonnieren Sie unseren Newsletter
> Stay updated: Subscribe to our newsletter:
> Restez en ligne: Abonnez-vous à notre courriel de nouvelles:
>
> Info: <http://www.wuesten.net/news.htm>
> **************************************************
>
>
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>
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>
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