Design

Radio Shack Intercom, EMI issue
Just in case anyone found a miracle fix: Got some Radio Shack powerline intercoms here, article number 43-3106 but not sold anymore. Looks similar to this one but white: http://www.radioshack.com/product/index.jsp?productId=2036287 Whenever the new DECT phones ring the thing goes berserk. Loud beeper turns ... 12 Oct 2009 17:29

Beta sucked?
> Beta sucked.  I preferred U-matic or 1" broadcast video tape.  No surprise that you chose the losing format. You preferred an analog format to a digital format? You must have REALLY loved open reel video tape then! In what capacity were you exposed to these? ... 12 Oct 2009 16:21

Unified FPGA Development Suite
Is there a development suite that is good but can target multiple fpga manufactures? I don't really want to install a bunch of 1GB+ light versions for each manufacture just to see which one is best. In fact I can't even get libero to run because it crashes on startup. Also, know of any links for DIY fpga programm... 6 Nov 2009 12:34

my lab
Well I got a HP 5316A universal counter, with the 1GHz channel and the OCXO. Very nice, I think. Although I suppose I still have the problem of not knowing exactly the frequency of the OCXO is, after all there are coarse and fine adjustments on the can... Eh, still, I'm pretty happy with the cheap stuff you can ge... 22 Oct 2009 10:45

LT Spice schmitt oscillator
Does anybody have a working LT Spice netlist for a simple schmitt inverter/R-C oscillator? I tried one using the library schmitt inverter and get obscure sim errors, and I don't understand the HELP stuff. What's the third pin in the corner for? Ground? Thanks, John ... 12 Oct 2009 01:57

fun h bridge for winch control
oh you guys are gonna like this one... so i bought a winch for my jeep but it didnt come with a controller box. so i need a way to connect the 12V from the jeep battery to the winch ON and OFF like....and reverse it...so I can reverse the winch direction thats it! needs to be controlled with a rocker swi... 13 Oct 2009 14:27

Need to supply power to 8 sensors. What is the best way?
Using either CR30-DN or CR30-15A0. According to the datasheet (Click on "CR Series - Catalogue": http://www.autonics.com/products/products_detail.php?catecode=01/01/03&db_uid=10) the current consumptiion is "Max.15 mA for the digital sensor (CR30-DN and a ----- or blank for the analog sensor. ) First I don't unde... 6 Oct 2009 13:45

OrCad - A nice tool for designing schematics
Hello Friends, Today many of us are using the tool, OrCad for designing their circuit and beginners in this field might find some difficulty where to start with. For all those I recommend you to start with this tutorial. This tutorial is intended for beginners in printed circuit board design who wish to design a S... 6 Oct 2009 03:21

USB spectrum analyzer
I'm looking for a USB spectrum analyzer for occasional use. My immediate requirement is to cover the range 100kHz to 3MHz but up to 30MHz would be good. Any recommendations based on personal experience? ... 13 Oct 2009 08:50

Proper use of differential outputs
I'd appreciate some witty put-downs and scathing feedback on the following. * I want to take the opportunity of a circuit redesign on a piece of scientific instrumentation to use a differential output to reduce EMC problems, but our industry normally uses single-ended analog signals for historical reasons, i... 4 Oct 2009 11:01