Electronics Forum

I want to order a couple of breakout boards from Sparkfun, nothing heavy. Do you know how much shipping should I expect?
Tom

Energizer USB Duo battery charger hides a Trojan
March 9, 2010 by Lin Edwards
(PhysOrg.com) -- The Energizer Duo USB battery charger has been hiding a
backdoor Trojan in its software that affects computers using Windows.

The electric service goes to the house, but I want to run the generator in
the barn.  So far I know,
* there are 3 unused #10 wires buried between the house and the barn.
* the electric to the barn comes from the house in 2 buried #000 cables.

What is the most preferred schematic capture software used by
Engineers?
Or at least, what is the most popular amongst those in this newsgroup?
Is there a standardized file format that can be read by other

Why do vehicle alternators not employ permanent (Nd) magnets?

A few years ago I was looking at a minivan with defective ABS and I
turned to an astute ex used car dealer and said incredulously,
"there's no way a big auto company would design a car without any back
up brake system . . ."

These tests have been taken from the Book - "Signal Integrity for PCB
Designers".
http://www.ezdia.com/Test_your_Signal_Integrity_skills_with_this_set_of_quiz/Con
tent.do?id=652
Take this test brush up your skills on Signal Integrity

What is the problem with operating a CFL on a dusk to dawn device that
uses a photo sensor? Does it suffer the same fate as running the CFL
on a dimmer that is full on? That's my guess.  My motion sensor
security light has an option to turn the lamps on manually and shut

Need a sound recorder for recording noise intrusion from an adjacent
tenant.
Using Sony ICD-SX700 did not achieve very good results.
What should I use?

Well, I was bored and curious...so if you've been wondering what's
inside this (or probably almost any other) HD Radio tuner, here it is:
(warning: the following link contains large quantities of pictures and
is therefore not friendly to those who have bandwidth caps or are

I need to rant...
Welcome to life in the slow lane.  I got an email from a customer
asking what type of contact cleaner to use on his laptop keyboard.  I
grab the phone, call, but too late.  He had already sprayed contact

I'm seeking a supplier that supply gold plated metal spacer, washer
and screw which is to be used to pass 10Amp audio waveform signal
between two boards about 12mm aparts. The screw is M3.
Has anyone done this kind of arrangement before, is gold plated

Is it ok to solder the tips of stranded wire before inserting into a
terminal block?
I like soldering the tips so that there's no wire fraying or free
strands.

Does such a chip exist?  I can't find it.
MAX9375 or PTN3310 = Single LVDS to LVPECL
tb5d1m = Quad LVTTL to LVPECL
MC10H352-D = Quad CMOS to PECL

I was thinking about all the fringe-science "Magnet Motors" and found
myself reasoning thus:  suppose there's a way to power a flywheel by
slowly demagnetizing some permanent magnets.  Wipe out the magnets'
stored energy, and inject it as KE into the flywheel.   If possible,

When a uP or uC is exercising its POR cycle, what are the states of
the output pins?  Floating, or held low, or what?
Particularly if it's recovering from a brown-out that caused POR to be
exerted.

These tests have been taken from the Book - "Signal Integrity for PCB
Designers".
http://www.ezdia.com/Test_your_Signal_Integrity_skills_with_this_set_of_quiz/Con
tent.do?id=652
Take this test brush up your skills on Signal Integrity

The final examination....
http://www.longwarjournal.org/archives/2010/03/american_al_qaeda_sp.php
How Obummer handles this will probably end his Presidency... good
riddance!

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The TI data sheet for the TL431 shows two different stability graphs,
one for "All TL431 and TL431A devices except for SOT23-3, SC-70 and Q-
temp devices" while the other is for "All TL431B, TL432, SOT23-3, SC70
and Q-temp devices".  Both graphs are for 25 deg C only.

Does the UPD720200, Datasheet :
http://www.townt.com/datasheet/nec/UPD720200.pdf is the only one USB 3.0
chip ?
Any low cost replacement yet ?

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It would be highly appreciated if you could share this announcement
with your colleagues, students and individuals whose research are in
parallel computing, distributed systems, operating systems, computer
architecture, grid-computing, VLSI,  and related areas.

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Only $27 Plus $100 Exclusive Bonus.
http://earth-4energy-review.123probiz.com
Go Green :)

Einstein's Biggest Blunder - - Wasn't??
a bit more light about it
(click link)
http://www.amperefitz.com/einsteins.blunder.htm

It would be highly appreciated if you could share this announcement
with your colleagues, students and individuals whose research are in
parallel computing, distributed systems, operating systems, computer
architecture, grid-computing, VLSI,  and related areas.

Full Access To All Earth4Energy Videos
And Tutorials For Only $27.
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Thanks

It is in the Title 24 California Code in PDF format (71 meg)
at:
http://ftp.resource.org/bsc.ca.gov/title24_part03.pdf

There are many equations to describe what happens whenever
it does happen, but why does the current flow in the first place?
I used to think that it was electrostatic pressure caused by all
the electrons being bunched up against each other and so

Hi, I am reading instrutions on hooking up an Intellibeam IB-250s intruder
alarm system.. It sends a beam from transmitter to reciever and if broken
sets alarm off.
I see in the diagram it has 3 wires going from the reciever to the alarm..

I plugged our vacuum in to the GFI in the kitchen, and when I turned
it on, I heard a "pop" and assumed it was the GFI that needed to be
reset for some reason. Well, the GFI plug was acting completely dead.
I pulled it out of the wall, pulled off the line wires and tested them