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(control 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 (or the more water), 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.
Rain Drop Sensor Pinout
This module has 6 pins:
- VCC: Module power supply – 3.3-5 V
- GND: Ground
- DQ: Digital Output
- AQ: Analog output
- +: To connect pads
- -: To connect pads
You can see pinout of this module in the image below.
Raindrop Sensor Features:
- Working voltage 5V
- Output format: Digital switching output (0 and 1), and analog voltage output AO
- Potentiometer adjust the sensitivity
- Uses a wide voltage LM393 comparator
- Comparator output signal clean waveform is good, driving ability, over 15mA
- Anti-oxidation, anti-conductivity, with long use time
- Provide both digital and analog output
- Adjustable sensitivity
- Output LED indicator
- Compatible with Arduino
- TTL Compatible
- With bolt holes for easy installation
- Small board PCB size: 3.2cm x 1.4cm
- Pad Size: 55mm x 40mm
Packages include
- 1 x Raindrop Sensor Board
- 1 x Dashboard
- 2 x Female/Female jumper wires
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