{"product_id":"rain-drop-sensor-module-with-lm393-comparator-for-arduino","title":"Rain Drop Sensor Module with LM393 Comparator for Arduino","description":"\u003ch5\u003eOverview \u0026amp; Features\u003c\/h5\u003e\n\u003cp\u003eWhether you are building a custom IoT weather station or designing an automated smart home system that closes windows during a storm, the \u003cstrong\u003eArduino Compatible Rain Drop Sensor Module\u003c\/strong\u003e provides a simple and reliable way to detect moisture and rainfall. This two-part system consists of a large conductive moisture sensing pad and a dedicated control board driven by the highly stable LM393 voltage comparator.\u003c\/p\u003e\n\n\u003cp\u003eAvailable at Tomson Electronics, this module features a high-quality FR-04 double-sided sensing board treated with a nickel-plated finish to prevent rapid oxidation and extend its lifespan when exposed to outdoor weather conditions. The control board provides dual output modes: a digital output (DO) for a simple high\/low rain trigger, and an analog output (AO) that allows your microcontroller to measure the exact intensity of the rainfall. Sensitivity can be easily fine-tuned using the onboard potentiometer.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAlso searched as:\u003c\/strong\u003e arduino rain sensor module, water drop detector for smart agriculture, lm393 weather station moisture sensor, analog digital rain detection board, automated wiper sensor.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch5\u003eTechnical Specifications\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating Voltage:\u003c\/strong\u003e 3.3V to 5V DC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComparator Chip:\u003c\/strong\u003e LM393 (Highly stable)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutputs:\u003c\/strong\u003e Digital Output (DO) and Analog Output (AO)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSensing Board Material:\u003c\/strong\u003e FR-04 Double-Sided PCB with Anti-Oxidation Nickel Plating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSensitivity Adjustment:\u003c\/strong\u003e Onboard blue potentiometer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLED Indicators:\u003c\/strong\u003e Power Indicator (Red) and Digital Output Indicator (Green)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControl Board Dimensions:\u003c\/strong\u003e Approx. 3.2cm × 1.4cm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSensing Board Dimensions:\u003c\/strong\u003e Approx. 5.0cm × 4.0cm\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch5\u003eCommon Applications\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDIY IoT Weather Stations:\u003c\/strong\u003e Interfacing with Arduino or ESP32 microcontrollers to log precipitation data and exact rainfall intensity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmart Agriculture \u0026amp; Gardening:\u003c\/strong\u003e Triggering automatic irrigation sensor systems to shut off water pumps when natural rainfall is detected.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHome Automation Systems:\u003c\/strong\u003e Sending signals to motorized linear actuators to automatically close roof vents, awnings, or windows during a sudden downpour.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomotive Prototyping:\u003c\/strong\u003e Designing custom automatic windshield wiper systems based on real-time moisture detection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch5\u003eFrequently Asked Questions\u003c\/h5\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the difference between the Analog (AO) and Digital (DO) outputs?\u003c\/strong\u003e\u003cbr\u003e\nA: The Digital Output (DO) simply acts as a switch, dropping from HIGH to LOW when a specific threshold of water is detected (set by the potentiometer). The Analog Output (AO) provides a variable voltage reading based on how much water is bridging the traces on the sensor pad, allowing your microcontroller to determine if it is lightly drizzling or raining heavily.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Is this sensor fully waterproof?\u003c\/strong\u003e\u003cbr\u003e\nA: The large sensing pad is designed to be exposed to rain and moisture outdoors. However, the small control board containing the LM393 chip and potentiometer is \u003cstrong\u003enot\u003c\/strong\u003e waterproof. You must mount the control board inside a dry, weatherproof enclosure away from the elements.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How do I adjust the sensitivity?\u003c\/strong\u003e\u003cbr\u003e\nA: Use a small Phillips or flathead screwdriver to turn the blue potentiometer on the control board. Turning it adjusts the threshold at which the Digital Output (DO) triggers and the green indicator LED turns on.\u003c\/p\u003e\n\n\u003ch5\u003eResources\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/2132\/9029\/files\/Rain_Drop_Detection_Sensor_Module.ino?9639147863411605006\" target=\"_blank\"\u003eArduino Sample Development Code (.ino)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch5\u003ePackage Includes\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e1 × Rain Drop Sensing Board (Nickel Plated)\u003c\/li\u003e\n\u003cli\u003e1 × LM393 Control Board\u003c\/li\u003e\n\u003cli\u003e1 × Set of DuPont Jumper Wires (Female to Female)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Generic","offers":[{"title":"Default Title","offer_id":49517859504366,"sku":"SEN-06585","price":59.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2132\/9029\/files\/RAIN_DROP_SENSOR.jpg?v=1788172626","url":"https:\/\/www.tomsonelectronics.com\/products\/rain-drop-sensor-module-with-lm393-comparator-for-arduino","provider":"Tomson Electronics ","version":"1.0","type":"link"}