Latest threads in Electronics Designshow only best voted threads

Subject Author Posted Replies
 
Grounding an aluminum enclosure to copper pads on a PCB
So we found a place to weld an aluminum wire to an aluminum enclosure (19mm diameter tube). Now we are trying to figure out an economical way to connect that wire to a PCB. The suggestion we have is...
44
44
 
Skunk Works' Compact Fusion Reactor Patents Issued
It was just announced that Lockheed-Martin Company had been granted patents on their new fusion reactor design. I saw an article on page B1 of the 14 November 2014 issue of The Wall Street Journal...
3
3
 
Measuring high resistance
Is there a simple way to do high resistance measurements (as per using a Megga) ? I need to do isolation tests and record results >20M.... most measurements with a mega are >>1G Accuracy is not a...
31
31
 
Released version 0.3 of my rtl_sdr based spectrum analyzer software for Linux:
Released version 0.3 of my rtl_sdr based spectrum analyzer software for Linux: xpsa requires a DVB-T USB stick, librtlsdr, libforms (xforms), fftw3, some other stuff. This one supports any mixers up...
 
Off topic sorta -- space heaters
-- And I ask you guys because this is my go to group. Even if it's electrical I can get a definitive answer here. Don't really know Jack S. about heater technology, all I know is a watt is a watt but...
14
14
 
BNC Connectors
For the outer (screen) on a mating pair of BNC's, what is supposed to be the mating surface? From the male perspective, is it the outer surface (circumference) of the tube - which always seems loose...
14
14
 
Proximity sensors
I need to detect the presence of an object at the front of my PCB with a maximum distance about 10-20cm. The behaviour would be similar to the proximity sensor found in modern touch-screen smartphones...
14
14
 
Running GPIB Interface
First after reading this can you recommend a more appropriate group? Forum? I have a program that was running on a Windows 98 computer, it died. The program controls an HP 3330B Automatic Synthesizer...
24
24
 
Back to back Jfets
A while ago Phil Hobbs mentioned a jfet with 'interchangeable' drain and source. I am wondering how much different that would be compared to if you got 2 jfets (call them Q1 and Q2) and connected Q1...
26
26
 
Film caps in vacuum environment
Anyone have any idea of the suitability or not of using X2 film caps in a vacuum environment [~0.6mBAR]? Can't seem to find anything on Epcos or Vishay datasheets. No replies to emails to their apps...
14
14
 
What is the mystery behind "white light led light from 1.5 Volt AA battery"
Could some electronics guru please shed some light on this ? Several Web sites(please check list below) have schematics and flashy color photographs of single white led light powered off a single 1.5...
12
12
 
You think we are here for a purpose? Yes... humiliation!
Open it with your net browser. This one is pretty complete. Most of them I find on the net have been edited. Some add "Your mom" at the end. I feel REALLY small. You should too.
 
OT: html Clean-up ??
I have some documentation written in html notation, and it's full of such stuff as... – ±   −   etc. It's a _huge_ document, so I'm wondering if there's some simple way to replace these html...
8
8
 
gate driver
I need a mosfet gate driver, to drive two n-fets in a half-bridge (totem pole) config, 5 volts nom in, with some sort of bootstrap for the upper fet gate. Switcher output will be around 2.5 volts at 5...
13
13
 
Reducing Copper Trance Resistances, ideas?
Hi We are running 25A in copper traces in a frequency inverter. I have reduced the power dissipation of the traces by increasing the copper thickness from 70u to 105u and increased the widht of the...
54
54