| Rain Alarm |
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Features : |
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 Able to Detecting water , Rain |
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Alarm by Buzzer |
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Circuit Description : |
| This circuit gives out an alarm when its sensor is wetted by water.A 555 astable multivibrator is used here which gives a tone of about 1kHz upon detecting water.The sensor when wetted by water completes the circuit and makes the 555 oscillate at about 1kHz |
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Figure1 Schematic of Rain Alarm
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| In figure 2 show sensor of rain alarm which mead from PCB by connection A and B |
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Figure2 Schematic of sensor Rain Alarm (PCB) |
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Rain Alarm 
