how to make rain alarm

how to make a rain alarm:

This is a rain alarm project. this circuit makes an alarm when it gets water on its probe. This prob works in this circuit as a switch. when the probe gets water then it works as the switch and then the alarm makes a sound. it’s a simple circuit diagram. this circuit also can use for babies. when a baby makes pee we can’t understand. if we use this circuit under the baby bed cloth then we can understand easily that the baby gets wet. 

here use one 3.7-volt battery. if we want to use a small battery we can. but this circuit run with max 5 voltage. 

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Build a Transformer or construct the transformer. Home Theater Circuit Diagram 5.1

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