DuinoTech Arduino Compatible Rain Sensor Module – Adjustable Sensitivity, 100mA TTL Output

You've got an automated greenhouse, a solar tracker, or a weather station that needs to know when it's actually raining versus a light drizzle. This module reads the water on its sensor plate and flips a digital output when you say it should. The small blue potentiometer sets your threshold – turn it until the LED changes state at the rain level that matters to your build. TTL output drives 100mA, enough for a small relay or buzzer without needing a buffer. Plug it into your Arduino, set the sensitivity, and let it do the watching

• Adjustable sensitivity via on-board blue potentiometer
• TTL-level digital output capable of driving 100mA
• LED indicator shows current sensor state at a glance
• Arduino compatible – connects to standard I/O pins
• Drive a small relay or buzzer directly from the output