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12/29/2009
power inverters
power inverter
from simin co . modified sine wave and pure sine wave models
2009-12-29 下午 4:29:31
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switching device
The electromechanical version of the switching device includes two stationary contacts and a spring supported moving contact. The spring holds the movable contact against one of the stationary contacts and an electromagnet pulls the movable contact to the opposite stationary contact. The current in the electromagnet is interrupted by the action of the switch so that the switch continually switches rapidly back and forth. This type of electromechanical inverter switch, called a vibrator or buzzer, was once used in vacuum tube automobile radios. A similar mechanism has been used in door bells, buzzers and tattoo guns.
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solar systems
solar power is more and more popular all over the world , it is clear and free obtain. all you need is a solar system includin panels, inverter , charger ...
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