Yantram SCI RAIN ALARM PROJECT Educational Electronic Hobby Kit

In this rain alarm circuit, the alarm gets played when a water droplet is sensed by a touch & water sensor. Here, all the required components will be connected in series as shown in the circuit diagram. Now, when the droplets of water are sprayed on the touch & water sensor, it senses the drops and as water is a conductor of electricity and the presence of water connects nickel lines in parallel so reduced resistance and the reduced voltage drop across it. Thus, the music will get started playing as output.