Concept: The project aims to create an electronic rain sensor detector and alarm system that can detect the presence of rain using a Raindrops Detection Sensor Module and trigger an alarm using transistors. The system is designed to be simple, low-cost, and easy to build.

Working Method:

1.            The project consists of a Raindrops Detection Sensor Module, a transistor-based alarm circuit, and a power supply.

2.            The Raindrops Detection Sensor Module is a small module that can detect the presence of raindrops using a small sensor.

3.            When raindrops are detected, the sensor sends a signal to the alarm circuit.

4.            The alarm circuit consists of a transistor, a diode, and a buzzer.

5.            The transistor acts as a switch, and when the signal is received from the sensor, it triggers the buzzer to sound an alarm.

6.            The diode is used to protect the transistor from any back EMF generated by the buzzer.

7.            The circuit can be powered using a 9V battery or any other DC power supply.