Raindrop Sensor Module
The Raindrop Sensor Module is a simple yet effective tool for detecting rainfall, water leaks, or surface wetness.
It consists of a rain detection board and a control module with comparator circuitry to output both digital and analog signals, allowing flexible integration with Arduino, Raspberry Pi, ESP8266/ESP32, and other microcontrollers.
By monitoring the change in resistance when water droplets land on the PCB plate, the module can trigger rain alarms, control irrigation systems, or activate wipers and covers in smart automation projects.
🔹 Key Features
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Dual Output: Analog output for precise moisture measurement, digital output for threshold-based detection.
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High Sensitivity: Detects light rain, mist, or water leakage.
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Adjustable Threshold: Onboard potentiometer for digital sensitivity tuning.
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Plug & Play: Separate sensor plate and control board with 3-pin interface.
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Wide Compatibility: Works seamlessly with Arduino, Raspberry Pi, and IoT controllers.
🔹 Technical Specifications
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Operating Voltage: 3.3 V – 5 V DC
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Output Signals:
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Analog (0–VCC) proportional to water intensity
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Digital (HIGH/LOW) with adjustable comparator
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Sensor Board Size: ~50 mm × 40 mm
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Control Board Size: ~30 mm × 16 mm
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Detection Principle: Resistance change across conductive tracks
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Operating Temperature: –10 °C to +70 °C
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Interface Pins: VCC, GND, DO (digital), AO (analog)
🔹 Applications & Use Cases
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Smart Irrigation Systems: Automate watering based on rainfall detection.
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Weather Stations: Measure rain intensity for data logging.
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Home Automation: Trigger windows or covers to close during rain.
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Leak Detection: Monitor roofs, basements, or pipelines.
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Robotics & IoT Projects: Rain-aware robots or outdoor devices.
🔹 Advantages for Makers & Engineers
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Compatible with Arduino and Accessories and other Electronics Components.
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Separate detection and logic boards make placement easy in outdoor setups.
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Low power draw, ideal for battery-operated weather nodes.
🔹 Safety & Precautions
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Do not submerge the sensor plate; it is designed for surface moisture detection.
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Dry the plate after use to prevent corrosion.
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Mount the control board in a weatherproof enclosure for outdoor projects.
🔗 Helpful Internal Links
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Find more Electronics Components to complement your weather station.
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Pair with Arduino and Accessories for easy data acquisition.
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Check Tools and Accessories for assembly needs.
🎥 Video Tutorial
📝 Product Summary
The Raindrop Sensor Module offers accurate, real-time rain detection with adjustable sensitivity, making it perfect for Arduino, Raspberry Pi, smart irrigation, leak detection, and IoT weather-monitoring systems.
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