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Electronic Components
Rain Sensor
Perfect for weather-aware robotics. Rain sensors allow your projects to respond to environmental changes in real-time.
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Rain Sensor (FC-37/YL-83)
Detects water droplets on its sensing pad. It consists of a series of conductive traces that get shorted by water, changing its resistance.
Key Applications
- Automatic windshield wipers
- Weather stations
- Smart plant irrigation
Operating Voltage: 3.3V - 5V | Dual Output: Analog & Digital🧪The Science Behind It
Rain sensors work based on the principle of Resistance and Conductivity. The sensing pad consists of interleaved nickel traces that act as an open circuit.
When water droplets fall on the pad, they create a bridge between the traces. Since water is conductive (due to dissolved ions), the resistance decreases, allowing current to flow. The more water on the pad, the lower the resistance.Dry = High Resistance (Infinite)
Wet = Low Resistance (Analog Output Drop)
Pin Configuration
VCC3.3V - 5V Power Supply
GNDGround Connection
AOAnalog Output (Directly proportional to wetness)
DODigital Output (Based on potentiometer threshold)