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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...Caller ID / Phone interfacing

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...Soldermask and

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:...Rebranded transistors?

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? ...A More Efficient Bridge Rectifier?

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...Rewinding an SMPS (again) More Questions

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...LTSpice Automation

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...Behavior of Regulators Near and Below Drop-out

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...Need Tiny Toggle Switches

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...Adjustable current mirror

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...Protecting 3x16 bits with 16 bits ?
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