Design

Funny liitle project, wrote UDP stack, with netcat on top: jppecat
Wanted to test a Microchip ENC28J60 ethernet controller chip. That chip is 3.3V and 5 V tolerant. So decided to test on the PC par port first. Ended up writing a complete UDP ARP subsystem in C, this will add ethernet for next to nothing to anything that has an 8 bits port. http://panteltje.com/panteltje/jppecat/... 5 May 2010 09:20

Looking For Help with a Fluke 196 Scopemeter
Does anyone have any experience with one of these? I have been trying to get a simple ac waveform to measure correctly on this and it just won't display it properly. Basically if I attach the 10:1 probe to an AC transformer with say 6 VAC output, the displays says it is 7.3 VAC, but the waveform will occupy 4... 4 May 2010 20:12

No one makes useful comparators
I want a +V = 3-15V comparator with PP output and at least -V rail. Bias doens't matter. Propagation under 200ns for 10mV overdrive. CMOS are all either low voltage (5 or 10V max) or stupendously slow (>>2us). LM393 would be fine if someone put a damn CMOS buffer on it. Tim -- Deep Friar: a very philo... 4 May 2010 17:58

Wavetek 23 croaks, anyone know of "notorious" falure areas?
So here I am, doing variable line frequency test and ... phssss ... PHUT .... *BAM* ... followed by a stench wafting about. I looked at what was supposed to be 265V/50Hz sine and found a totally distorted 1Hz, plus lots of heat in my amp which luckily survived. Turns out the Wavetek 23 function generator becam... 11 May 2010 13:24

Weatherproof "button"
Hi, I need some sort of "button" (sensor?) that I can locate out "in the elements" and use to activate the irrigation system. I.e., "push this button to turn on the water supply". It need not be a traditional "button" (in the electrical sense). E.g., a pressure sensitive pneumatic switch, a photoreflective se... 27 May 2010 22:33

Recommendations for inexpensive DSO
I know that this topic comes up regularly, but now that it looks like SWMBO is going to let us invest in a small oscilloscope. So, what is everyone's present recommendation? I know that Joerg likes the Instek, and that the Rigol has recently come up. Which models? And, where (besides Ebay) is a good place to fi... 12 May 2010 14:44

Greeks invented logic?
http://www.bloomberg.com/apps/news?pid=20601087&sid=ai35iM38zN08 Insane. Everybody in Greece will go on strike to punish... who? John ... 10 May 2010 18:48

Spring Morning in AZ
Spring Morning in AZ. Taken from my driveway. Note the cloudless sky, and the moon... http://analog-innovations.com/SED/SpringMorningInAZ.jpg ...Jim Thompson -- | James E.Thompson, CTO | mens | | Analog Innovations, Inc. ... 4 May 2010 20:12

SMPS EMI issues
Is there someone on here who could share their experiences with a Bias Power BPS-1 module? They make some pretty impressive claims on their web site, "eliminates EMI without external filtering", but I am skeptical. ... 6 May 2010 11:56

Sometime google can do it right,
So, I'm a google grouper because it's easy. At the moment there are 30 threads on the first page... back to yesterday, and only two are spam! George H. ... 4 May 2010 02:27