Raindrop Detection Sensor Module

The raindrop sensor module is used for rain detection. It is also for measuring rainfall intensity. The module includes a rain board and a control board that is separate for more convenience. It has a power indicator LED and an adjustable sensitivity though a potentiometer.

The module is based on the LM393 op-amp. It includes a printed circuit board that “collects” the raindrops. As raindrops are collected on the circuit board, they create paths of parallel resistance that are measured via the op-amp. The lower the resistance, the lower the voltage output. Conversely, the less water, the greater the output voltage on the analog pin. A completely dry board, for example, will cause the module to output five volts.

Specifications: 

• Operating voltage: 5V
• Output LED indicator
• Provide both digital and analog output
• Bolt holes for easy installation
• Compatible with Arduino
• Adjustable sensitivity
• TTL Compatible

Pin Description

• Vcc
• GND
• DO: digital output
• AO: analog output

Packages Includes:

1 x The raindrop sensor module set

5 x Female/Female jumper wires