What if I want a DC output to run such things as a laptop from a car cigarette lighter, or telephone equipment at -48 volts?
Then you want a DC/DC converter. PowerStream has some DC/DC converters just for those purposes. http://www.powerstream.com/dcdc.htm Q: What is the difference between sine wave and modified sine wave? A: Alternating current (AC) has a continuously varying voltage that swings from positive to negative. This has great advantages in power transmission over long distances. Power from your power company is carefully regulated to be a perfect sine wave, because that is what naturally comes out of a generator, and also because sine waves radiate the least amount of radio power during long distance transmission. On the other hand, a sine wave is expensive to make in an inverter, and many sine wave techniques use heavy, inefficient transformers. The most inexpensive way to make AC is to switch the DC on and off–a square wave. A modified sine wave is scientifically designed to simulate a sine wave in the most important respects so that it will work for most appliances. It consists of a flat plat
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