Small Explosion Follows Transformer Fire on Upper West Side: FDNY | Small Electrical Transformer

So what would you do when you need to push up to two amps DC in one direction at LiPo battery voltages, with low loss, driven (potentially by PWM) from a 3.3 V microcontroller? Feel free to take this as a guideline, and deviate wherever you’d like from the spec if it brings up an interesting solution.

Thermal direct joining has been developed and qualified by research institutions and companies for several years. However, the industrial applications in series production are still very limited. The reason for this is the complex component design leading to function-integrated hybrid designs. The choice of the right material in the right place requires the innovative viewpoint of the designers. The pure substitution of a metal component by a plastic or composite part leads to weight savings on the one hand, but at a significantly higher cost. Nevertheless, certain areas of application for the technology have already crystallized. For example, laser structuring before injection molding is used as an alternative to primer application or plastic modification for small series production. In thermal direct joining, the industry aims to manufacture housing components or connecting elements from temperature- and media-stable thermoplastics to connect them to die-cast aluminum. Additional flanges for a screw connection, as well as seals, can thus be omitted.

Today the capacity mix is natural gas/oil, 28 per cent; nuclear, 35 per cent; wind, 12 per cent; hydroelectric, 23 per cent; biofuel, one per cent; and solar, one per cent.

Among the Air Jordan 4s on tap is a "Hot Lava" (aka "Light Crimson") colorway, which will be arriving this Saturday, March 2. The kicks will reportedly be available in sizes for the whole family, with men's sizes retailing for $190.

“I wanted to try something new as far as coils went, and solid-state was the ‘final frontier,’ something I’d not gotten into yet,” he said. “There is also the efficiency and control you have with a solid-state coil.”

This story has been updated. Ontario Power Generation leases its Kincardine nuclear property to operator Bruce Power.

I also find GNU Units is an invaluable tool for engineering calculations: a scientific calculator that keeps track of, and converts, units.

[H01L] SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR (use of semiconductor devices for measuring G01; resistors in general H01C; magnets, inductors, transformers H01F; capacitors in general H01G; electrolytic devices H01G 9/00; batteries, accumulators H01M; waveguides, resonators, or lines of the waveguide type H01P; line connectors, current collectors H01R; stimulated-emission devices H01S; electromechanical resonators H03H; loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers H04R; electric light sources in general H05B; printed circuits, hybrid circuits, casings or constructional details of electrical apparatus, manufacture of assemblages of electrical components H05K; use of semiconductor devices in circuits having a particular application, see the subclass for the application) [2]

6,3A max, will heat it 107 degrees above ambient, so at 25 degrees Celsius ambient you’ll burn you fingers but not the FET. Best keep it well below 5A and give it a big copper plane when switching large currents.

Inventor(s): Dane Grasse (Richardson, TX) Assignee(s): Drexel University (Philadelphia, PA) Law Firm: Saul Ewing Arnstein Lehr LLP (4 non-local offices) Application No., Date, Speed: 14122906 on 06/01/2012 (2412 days app to issue)

Wow, this brings back memories. Yesterday I was cleaning up some of my old stuff and ran across all of my RS P-box kits. They are pretty beaten up after being bashed around in boxes for 40+ years. But their affect on me when I was 10-11 was immeasurable. The first one I built was the AM radio and it was missing the germanium diode that was used as the detector. I naively thought I could just stick in an IN914 silicon diode and it would work the same. It didn’t and the sales guy at Radio Shack pointed this out to me and explained why. He didn’t have any germanium diodes in stock but he had a junk transistor radio that we salvaged a diode from to get the thing working. I might try to clean them up and get them working again. Probably have to replace all of the electrolytic caps. All of the transistors look like self biased germanium as well. Would be a fun project.

Northland Power, which started up a natural gas generation in Thorold in 2010, is one of a diverse number of gas-power producers. At its location next to the Welland Canal, south of St. Catharines, it produces 285MW of power for the Ontario grid.