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The HW-028 Rain Drop Sensor Module tracks water presence on a 5.0x4.0 cm surface. Using the LM393 comparator, it outputs TTL digital or 0-5V analog signals. It draws 3.3-5V, fitting standard Arduino power rails.
Key Features
- Dual Output Support: Provides analog and digital signals from the board pins. Supplies precise rain intensity data.
- Adjustable Sensitivity Potentiometer: Trims the threshold using an onboard 10k potentiometer. Calibrates triggers for light mist.
- Nickel Plated Surface: Uses anti-oxidation coating on the 5.0x4.0 cm sensing plate. Resists corrosion from high humidity.
- High Driving Capability: Delivers an output current exceeding 15mA for external loads. Powers small relays or LEDs.
- Compact Control PCB: Measures 3.2x1.4 cm with pre-drilled fixed bolt holes. Fits inside tight project enclosures.
Frequently Asked Questions
How does a rain sensor module work with Arduino?
Water on the sensor tracks decreases resistance, triggering the LM393 comparator. The Arduino reads this as a digital low or variable analog voltage.
What is the voltage of HW-028 rain sensor?
The module accepts a 3.3V to 5V input range. It integrates directly with 5V Arduino Uno or 3.3V ESP32 systems.
