Integrated circuits, resistors, capacitors

3M Shrink Tubing Insulation numbers?

admin — Fri, 03 Feb 2012 10:15:40 +0000

3M’s data sheet (from Digi-Key):

says that the EPS-300 tubing’s insulation rating is 700V/mil. The 3/16 tubing
is 0.020 inches (20 mils) thick, when shrunk, which means it’s rated to over
14000 volts?

That just seems a bit high. Is this right?

I simply need about 1500 v insulation for CCFL inverter wiring in a laptop…
Thanks,
—
DaveC
m…@bogusdomain.net
This is an invalid return address
Please reply in the news group

Windows XP Help

admin — Fri, 03 Feb 2012 10:15:21 +0000

Windows XP help and tips to increase your productivity and help solve
computer problems. Topics include Tweak UI, account management, remote
desktop connections, using printers, removing spyware on Windows XP
systems, DOS and Batch Files, and more. http://windows-xp-tipss.blogspot.com/

Bleeder resistors >1kV

admin — Fri, 03 Feb 2012 10:15:00 +0000

Usual resistors are rated up to around 700V dielectric. Some exotic SMT
can go to kilovolts but they are expensive, rare and also long so that
breakage or other flex damage is likely. Then there are small specialty
mfgs such as Hokuriko but they aren’t really very available at the usual
distributors. Who sells regular resistors that are rated as bleeders
preferably with medical device blessings?

–
Regards, Joerg

http://www.analogconsultants.com/

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Do you know a Reliable PCBA Service Company

admin — Fri, 03 Feb 2012 10:14:02 +0000

Dear All,
We have designed a board with 2 FPGA’s 1 CPLD 1 microcontroller on
it. We would like to manufacture it now but need a reliable PCB
Assembly company. What we need is to send the Gerber Files of the
board and BOM list and order the board. Do you know any reliable PCBA
companies for low volume (<100 pcs.) in the far east or elsewhere?
Please share your personal experiences.
Thanks in advance..

Old Transformer Replacement

admin — Fri, 03 Feb 2012 10:13:39 +0000

We need to find a replacement transformer for an old unit. The
original has a dead short between primary and secondary. As best as I
can tell, the transformer is marked Vernon Co., V_6021, Pri:135VAC Sec:
25VAC. It feeds into a full wave rectifier into a DC motor, no
capacitors. The motor draws 24V at 12.2A, per the mfg dataplate. Any
ideas for a replacement transformer? Line frequency is 400Hz, but
60Hz transformer will be just fine.

Thanks,
Steve

Free downloaded book on the history of electricity and electronics

admin — Fri, 03 Feb 2012 10:13:20 +0000

The book "Much Ado About Almost Nothing", which has been retailing for $
14.95, is now also available as a free download at
(.pdf format, 238 pages, 1.8MB).

Written by Hans Camenzind, the designer of the 555 Timer, the book spans
2600 years and focuses on the contributions and personalities of a many
discoverers and inventors, such as Gilbert, Franklin, Galvani, Volta,
Oersted, Ampere, Ohm, Henry, Faraday and Edison.

The genius of Nikola Tesla gets a detailed treatment, as does his descent
into madness. The contributions of Guglielmo Marconi, Le de Forest and
Vladimir Zworykin are critically examined and credit is given to the much
underrated Howard Armstrong and Philo Farnsworth.

The book ends with the historic controversy between Jack Kilby and Robert
Noyce about the microchip and sets the record straight as to who invented
what.

"Much Ado About Almost Nothing" follows Camenzind’s 2005 publication of
"Designing Analog Chips", a book that is also simultaneously selling in
printed form and can be downloaded at no charge.

Have you NEGOTIATED anything?

admin — Fri, 03 Feb 2012 10:12:59 +0000

Wait for an important announcement on 1/29/2008!

DTV

admin — Fri, 03 Feb 2012 10:12:39 +0000

http://www.pressofatlanticcity.com/news/local/ocean/story/7530500p-74…

Tweaks for XP

admin — Wed, 01 Feb 2012 01:13:49 +0000

Windows XP tips and tricks. Learn how to bypass very common windows
problems, speed up your system and make it more reliable with useful
tips and tricks. http://windows-xp-tipss.blogspot.com/