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I WANT TO MAKE IT BECAUSE OF THE PROBLEM OF RAINING.SO I MAKE IT VERY SIMPLE.
(1)BC548 TRANSISTOR - I PIECE(2)A BUZZER.(3) SOME WIRE(4)9 V BATTERY(5)BATTERY CAP
(1)BC548 TRANSISTOR - I PIECE
(3) SOME WIRE
(4)9 V BATTERY
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