Raindrop Rain Sensor Module

The Raindrop Rain Sensor Module is designed to detect the presence and intensity of rain or water droplets. It includes a rain detection plate, an LM393 comparator control module, and connecting wires, making it ideal for Arduino, ESP32, Raspberry Pi, weather stations, automatic wiper systems, smart irrigation, and IoT projects.

Features

• Full Name: FC-37/YL-83 Raindrop Rain Sensor Module with LM393 Comparator
• Detects rain and water droplets accurately
• Adjustable sensitivity using onboard potentiometer
• Provides both Analog (AO) and Digital (DO) outputs
• Low power consumption
• Built-in LM393 comparator for stable operation
• Onboard power and output indicator LEDs
• Easy interfacing with Arduino and other microcontrollers
• Compact and lightweight design
• Ideal for weather monitoring and automation projects

Specifications

Specification	Value
Product Type	Rain Detection Sensor Module
Sensor Model	FC-37 / YL-83
Comparator IC	LM393
Operating Voltage	3.3V – 5V DC
Operating Current	≤20mA
Output Type	Analog (AO) & Digital (DO)
Detection Method	Water Conductivity
Adjustable Threshold	Yes (Onboard Potentiometer)
Interface	4-Pin Header

Applications / Uses

• Rain detection systems
• Automatic windshield wipers
• Smart irrigation systems
• Arduino and ESP32 projects
• Raspberry Pi projects
• Weather monitoring stations
• Smart home automation
• Water leakage detection
• IoT monitoring systems
• Educational electronics projects
• DIY automation projects
• Environmental monitoring

Pin Configuration

Pin	Function
VCC	3.3V–5V Power Supply
GND	Ground
AO	Analog Output
DO	Digital Output

Working Principle

1. Water droplets fall onto the rain sensor plate.
2. The conductive tracks on the plate detect changes in electrical conductivity.
3. The LM393 comparator processes the signal.
4. AO provides an analog voltage proportional to the amount of water detected.
5. DO changes its logic state when the moisture level exceeds the threshold set by the onboard potentiometer.

Size

Rain Sensor Plate

• Length: Approx. 55 mm
• Width: Approx. 40 mm

Control Module

• Length: Approx. 32 mm
• Width: Approx. 14 mm
• Height: Approx. 12 mm

Jumper Wires

• Length: Approx. 20 cm
• Weight: Approximately 20–25 g (Complete Kit)

Package Includes

• 1 × Rain Sensor Detection Plate
• 1 × LM393 Comparator Module
• 2 × Connecting Jumper Wires

Note: For improved durability, avoid exposing the sensor plate to water continuously for long periods. After use, wipe the sensor dry to minimize corrosion and extend its service life.