Electronics Forum / Design

I like to go clubbing. I've noticed that sometimes the sound quality
is terrible. Distortion like clipping due to using underpowered amps.
I've also noticed that after a night out at these places I get a bad
ringing that lasts for weeks, and it's not just my regular tinnitus,

I've got around to building a loop driver, so my neighbour can listen
to her TV.
The loop is only sofa sized, and I can pick up the mag field with a
small inductor, which rises at 6dB/oct, as expected

These days people are mostly using binary[digital] processors
and me too, they are great, but I'm bored with them.
I'm interested in designing the circuitry,with out the concept
of digital,

Has anyone used this for really fine pitch soldering?
http://www.geekalerts.com/usb-microscope-with-2gb-online-storage/
I am looking for something small that I can throw into the bag in a
pinch and that can live with my laptop (or pretty soon netbook) as a

I was arguing at work yesterday that relays have gain. Just because
it's non-linear and electromechanical doesn't mean it has no gain. I
mean a light switch has gain if you look at the power you can control
with a finger. I think that silicon guys think gain must be linear or

The world has never seen such freezing heat
By Christopher Booker, UK Telegraph, 16/11/2008
A surreal scientific blunder last week raised a huge question mark
about the temperature records that underpin the worldwide alarm over

"Timothy Wootton, from Chicago University, said scientists found that
acidity levels increased at more than 10 times the rate predicted by
computer models designed to study the link between atmospheric
concentrations of carbon dioxide and ocean acidity."

I'm planning on paralleling 50 1uF 200V ceramic chip capacitors.
(Yeah I know that's goofy.. )
__Stress on capacitor pack.__
Vcap.peak = 170V

Look at these pictures:
http://i36.tinypic.com/2v8s3uq.jpg
http://i33.tinypic.com/2mmab1k.jpg
It is a commercial off-line AC/DC SMPS.

I need to design a wide input range converter (16VDC to 600VDC) with
two 5V outputs with a total power of 25W.
The supply needs to be double isolated and my first thought was to use
a HV buck converter to step the voltage to 16V and then a forward

I was watching a program on PBS called 'NOW'. It seems that they must
have hired some art student to come up with some new screen graphics,
which they place at the beginning and end of each story.
The graphics consist of two horizontal bars, one near the top and the

What happens if I sputter metal on top of an epiwafer, and then
sputter silicon on top of that metal?  Iow, would the sputtered
silicon that is on top of the metal be amorphous or polysilicon or
what?

I'm trying to write a small program to design basic Schottky diodes.
I'm using the following equation to calculate the current produced by
a small applied voltage, far below Vt -->
I = A * Aast * T^2 * exp(-barrier/Vt) * exp(V/(n*Vt) - 1)

I am designing an automotive product (operates 9 to 16VDC) that will
drive a regulated high current 10 amp load with a NPN low side drive
transistor.  It will maintain average current to the load via PWM
(400Hz 1% to 99% duty cycle) and sense resistor.

I need to backup a 340GB hard drive.
Has anyone here used Blu Ray for this purpose?
After reading a bit about the subject, it appears that there are four types
of Blu Ray writable formats: