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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 5027 threads in our archives.

You are looking at page 11 of 503.

The threads with the newest articles are listed first.

PLL Breadboard Issues [15 articles]

Chris - 2010-03-02 18:02:00
I bread boarded my PLL yesterday. I was able to get it to lock just fine on a multivibrator running at 33Hz. I was able to solve the jitter problem by using a very large value for C1 (1000u). Ho...PLL Breadboard Issues

Where can I find a computer like this? [37 articles]

Green Xenon - 2010-03-02 17:45:00
Hi: I'm looking for a laptop that: 1. Does not have any non-volatile RAM 2. Does not need any non-volatile RAM to run properly 3. Compromises among the following: 3a. Is the least expensive ...Where can I find a computer like this?

Help with avoiding ground-loops on my PCB+external [8 articles]

digitaljanitor - 2010-03-02 12:23:00
All, Apologies for the cross-post, I know a lot of people who deal with FPGAs are also experts with PCBs, stack-ups, high-speed layout, hoping for some good ideas from both groups. I'm not an ex...Help with avoiding ground-loops on my PCB+external

Let's see how stumped JL et al. get this time [19 articles]

Tim Williams - 2010-03-02 12:13:00
http://webpages.charter.net/dawill/Images/Fast_DCDC.gif Runs at 435kHz at 2W maximum output. Tim -- Deep Friar: a very philosophical monk. Website: http://webpages.charter.net/dawill/tmora...Let's see how stumped JL et al. get this time

qualitative electronics [2 articles]

Jon - 2010-03-02 09:53:00
I don't know the difference between a pnp and an npn, but I had a transistor. All I knew was the middle terminal acted like a valve for current to pass between the outer terminals. So how did I ...qualitative electronics

2 circ. pol. fields at 90 degrees [3 articles]

Mark Roberts - 2010-03-02 06:46:00
Can someone with a better grasp of vector dynamics than myself please tell me what occurs interactively when two identical circularly polarized EM fields meet at right angles? Do they cancel or t...2 circ. pol. fields at 90 degrees

Stealth chopper blades [9 articles]

amdx - 2010-03-02 04:01:00
http://www.popsci.com/technology/article/2010-02/video-eurocopter-introduces-silent-rotor-blade-stealth-choppers ? Mike ...Stealth chopper blades

Today's Fixit Problem [13 articles]

Jim Thompson - 2010-03-01 18:35:00
Today's Fixit Problem... http://analog-innovations.com/SED/TodaysFixItProblem.jpg Sonic boom: Fluorescent fixture in the laundry room breaks loose from ceiling on one end :-( Was dangling do...Today's Fixit Problem

Looking for simple way to demodulate a 40Khz signal [20 articles]

lighthouseman - 2010-03-01 15:58:00
In a project I'm working on, one of the signals coming on to my board is a serial bitstream modulated with a 40 kHz square wave. Where presence of 40 kHz = '1' and no signal = '0'. So basically...Looking for simple way to demodulate a 40Khz signal

Infrared LED / detector design [40 articles]

Matt - 2010-03-01 14:03:00
Hello. It's been a while since I've posted. I'm working on an Ir LED / detector for a small robot platform I've made. I'm just having fun really, and learning! I've read a considerable amount a...Infrared LED / detector design
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