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Rain detector electronic circuit project

This rain detector electronic circuit project is an very simple alarm circuit , that will start an audio warning , if the liquid is present on the sense pad . This rain detector electronic circuit diagram is based on two transistors . When the sense pads conducts , Tr1 and Tr2 from an audio oscillatory circuit that will generate a pitch sound .

This circuit needs a 12 volts power supply circuit and the speaker needs to have a 32 ohms . The sense pad can be constructed on a small piece of printed circuit board .

Electronic Circuits: 
Circuit Diagram: 
Rain detector electronic circuit project

Comments

how will the sensor detect only rain water cos my supervisor said it must detect rain water only.pls help me out

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