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детектор полярности поля 1

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This is new type Electrostatic Polarity detector. This device detects positive & negative static electricity. Materials : 9V battery, Plastic bottle, straw, Red LED, Blue LED, 2 * 1k ohm resistor, tact switchs, FDS8958A (Dual N- and P-Channel enhancement mode power field effect transistors manufactured by Fairchild semiconductor) You can find FDS8958A from LCD monitor CCFL inverter circuit board. FDS8958A datasheet : Prior version :

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