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Sci.Electronics.Design
Sci.Electronics.Design is a worldwide Usenet news group that is used to discuss various aspects of Electronic Circuit Design.
There are 5013 threads in our archives.
You are looking at page 17 of 502.
The threads with the newest articles are listed first.
Caller ID / Phone interfacing [4 articles]
FyberOptic - 2010-02-22 02:34:00
I've been reading about how Caller ID works and think it would be a
fun project to try and decode it myself. I already understand a lot
about digital circuits, so I think once I had the two tones p...
Soldermask and "leakage" [5 articles]
Robert Baer - 2010-02-21 23:59:00
I have been testing small FR-4 PCBs with different color soldermasks
at temperature (177C).
Firstly, there is a big difference between "leakage" of green,red,
black and blue soldermask (red...Rebranded transistors? [30 articles]
Jan Panteltje - 2010-02-21 23:49:00
I ordered some BC557 from Conrad.nl.
Normally you can hardly red what is written on a transistor,
but in this case the label is silver painted masked,
and does not say 'BC557', but 'B557C':
ftp:...A More Efficient Bridge Rectifier? [68 articles]
D from BC - 2010-02-21 21:31:00
My offline smps design has 3 parts making the most heat.
A power diode, a mosfet and a bridge rectifier.
I'm interested in any cookbook designs that replaces a bridge rectifier.
Any pointers?
...Rewinding an SMPS (again) More Questions [5 articles]
Jim Flanagan - 2010-02-21 15:15:00
I made the decision to disassemble an SMPS transformer from a power
supply (which I do not have a schematic) for rewinding. My pre-disassembly
electrical tests showed that the primary had an in...LTSpice Automation [77 articles]
Tim Wescott - 2010-02-21 15:11:00
Does LTSpice have much in the way of automation capabilities?
I'm working on a switcher design, half in mathemagic land, half in grotty
old real circuits land -- I want to simulate the controller...Behavior of Regulators Near and Below Drop-out [26 articles]
Jim Thompson - 2010-02-21 15:04:00
This rainy afternoon (East-coasters beware, that usually spells more
snow for you), I was amusing myself trying to behavioral model a
voltage regulator when you hit drop-out.
Then I realized, I'v...Need Tiny Toggle Switches [6 articles]
Abby Brown - 2010-02-21 03:27:00
Hi,
I need some very tiny toggle switches for a miniaturized PDP-1
console
http://www.dbit.com/~greeng3/pdp1/PDP1.10.jpg
Half the size of subminiature or, preferably, smaller. I've
s...Adjustable current mirror [62 articles]
Tim Williams - 2010-02-20 16:32:00
Leading from earlier discussion, I have drawn this:
http://webpages.charter.net/dawill/Images/Variable_Mirror.png
Assuming thermal currents and voltages are equal, analysis suggests that Ic
is v...Protecting 3x16 bits with 16 bits ? [31 articles]
Skybuck Flying - 2010-02-20 13:55:00
Hello,
Soon I will attempt some gpgpu development/shader development... I have
already done some tests and so forth the gpu and it's memory seem to be
working just fine... (and fast ;) :)) No b...