General Electric has announced a new nine-watt LED light bulb that promises a lifespan of 17 years. GE says its Smart LED bulb, which replaces a traditional 40-watt incandescent light bulb, will go on ...

The basic schematic of an electronic transformer (ET) includes a traditional full-bridge rectifier, a self-oscillating chopping circuit, and an output-power transformer. The self-oscillating circuit ...

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Blue-light emitting LED bulbs have taken off with consumers because they have few downsides -- they're bright, use far less energy and last much longer than other types. In fact, the inventors just ...