Rain Sensor Module

The Rain Sensor Module is a simple and reliable weather detection sensor designed to detect the presence of rain or water droplets. It consists of a rain sensing plate and a comparator control board (LM393) that provides both analog (AO) and digital (DO) outputs, making it compatible with Arduino, ESP32, ESP8266, Raspberry Pi, STM32, and other microcontrollers.

When water droplets fall on the sensing plate, the resistance changes according to the amount of moisture present. The control board processes this signal and outputs either an analog voltage proportional to the water level or a digital HIGH/LOW signal based on an adjustable threshold using the onboard potentiometer.

This module is ideal for rain detection systems, smart irrigation, weather monitoring stations, automatic window closing systems, robotics, and IoT projects.

Specifications

• Product Type: Rain Sensor Module
• Sensor Type: Conductive Rain Detection Sensor
• Comparator IC: LM393
• Operating Voltage: 3.3V – 5V DC
• Supply Current: Typically < 20mA
• Output Types: Analog (AO) and Digital (DO)
• Digital Output: TTL Logic Level
• Analog Output: Variable voltage proportional to moisture level
• Sensitivity: Adjustable via onboard potentiometer
• Interface: 4-Pin Header
• Pin Configuration: VCC, GND, AO, DO
• Power Indicator: Yes (LED)
• Output Status Indicator: Yes (LED)
• Detection Medium: Rain, Water Droplets, Moisture
• Sensor Plate Material: Corrosion-resistant conductive PCB
• Mounting Holes: Yes (Sensor Plate & Control Board)
• Operating Temperature: -10°C to +60°C
• Compatible Voltage Logic: 3.3V and 5V Microcontrollers
• Compatible Boards: Arduino UNO, Nano, Mega, ESP32, ESP8266, Raspberry Pi, STM32, PIC, AVR
• Applications: Rain Detection, Smart Irrigation, Weather Stations, Water Leak Detection, Home Automation, Robotics, IoT Projects