How to make a Rain Alarm sensor (빗물 감지 센서 만들기)

Thomas Kim

687 84.1K

This is a Simple Rain alarm circuit made of 3V battery, Buzzer, Transistor and junk plastics. Rain Sensor Automatic Window : ...

08/29/16

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How to make a Rain Alarm sensor (빗물 감지 센서 만들기)

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