Design

Gate resistor
In article <7b9005d3-5d73-451e-a739-538f864b08ba(a)30g2000yqi.googlegroups.com>, Tim Williams <tmoranwms(a)gmail.com> wrote: Neet. I increased the gate resistors on a half bridge MOSFET inverter, and switching loss dropped significantly. Increased gate resistor = reduced gate clamping. Makes the MOSFET m... 31 May 2010 14:11

Shelf life of solder paste
I've had some leaded, water soluble solder paste (Kester HM531) for the last 3.5 years. Used it yesterday and it seems to still work like new. IIRC, shelf life was given as the usual six months. What gives? ... 7 Jun 2010 11:54

High Quality White Noise Gen
What are the best options for high quality audio white noise generation? I have been using generic diodes and reversed biased transistors. Then someone mentioned there are special parts available with better characteristics. Can anyone please give me a pointer? Jim Slone ... 11 Jun 2010 22:33

Problem with PIC18F46K20 building LED\blinking LED
I tried PIC18F46K20 C18 Lessons 1 lesson was successful- Build succeeded. But I still have a problem- LED is not light on. Why? I did all, what was in C18 lessons instruction, programmed corectly, but I dont see the light. (I tried to load the demo of Pong, it was working). The second problem is with blinki... 31 May 2010 08:40

Veterans, Thanks you for your service
Thank you to all veterans for your service to our great country. A special thanks to Micheal A Terrell. ... 31 May 2010 17:29

California schools $120M solar project
Yesterday I heard a radio story about the California School district spending $120 million to put solar energy in/on schools. I did a Google search and can't find any info. The numbers I heard didn't seem cost effective, so I'm curious. Anybody know more about it? Mike ... 14 Jun 2010 12:53

Simult. RH & LH Circ. Pol.
"Antennas with orthogonal elements that are combined in phase quadrature such as the crossed dipole with external 90 degree hybrid coupler. This type of antenna can produce right-hand and left-hand circular polarization simultaneously." "Simultaneously"? Can anyone explain how this works? What is the confgurati... 31 May 2010 18:35

Suspending the US Constitution
Kind of like the Secret session of the US Congress held in March 2008 to discuss imminent financial collapse and imposition of marshall law? http://www.lewrockwell.com/orig11/scott-pd3.1.1.html In July 1987, during the Iran-Contra Hearings grilling of Oliver North, the American public got a glimpse of “highly ... 31 May 2010 00:06

Tiller's "Intention Imprinting" Device?
The e-mail exchange so far: from Greg Hanson <greegor47 at gmail > to bill at tillerorg date Fri, May 28, 2010 at 11:35 PM subject UED Schematic and parts list? mailed-by gmail.com William A. Tiller Foundation For New Science Dr.William A.Tiller, et alia: Some associates of mine have taken an interest in ... 31 May 2010 15:17

Solar panel efficency
I did a survey and this is the best i got. Makers: (1) BP Solar technology: Advanced multicrystalline & monocrystalline silicon nitride; (2) First Solar modules: Thin film cadmium telluride; (3) Nanosolar: Thin film CIGS (copper indium gallium selenium); (4) Sharp: Monocrystalline & polycrystalline (silico... 19 Jun 2010 02:40