Rain Drop Sensor Module – Digital & Analog Output | Compoden
Rain Drop Sensor Module with Analog and Digital Output
The rain drop sensor module detects rain or water droplets by measuring changes in resistance on its nickel-coated sensing pad. It provides both a digital signal (triggered when moisture exceeds a set threshold) and an analog output proportional to the amount of water. Ideal for automatic weather stations, irrigation controllers, and water leak detectors, it connects easily to microcontrollers and single-board computers.
Key Specifications
| Specification | Value |
|---|---|
| Operating Voltage | 3.3V - 5V DC |
| Output Type | Digital (DO) + Analog (AO) |
| Comparator Chip | LM393 |
| Sensing Pad Dimensions | 54mm x 40mm |
| Module Dimensions | 32mm x 14mm |
| Connector | 4-pin (VCC, GND, DO, AO) |
What You Can Build With This
- Automatic rain alarm that buzzes when precipitation starts
- Smart irrigation system that pauses watering when soil moisture is high
- DIY automatic car windshield wiper control
- Roof leak detector with remote notification via Arduino and Wi‑Fi
Compatibility
The module works with all 3.3V and 5V microcontrollers that have digital GPIO and analog input pins, including Arduino Uno, Nano, Mega, ESP8266, ESP32, and Raspberry Pi (with external ADC). Its onboard comparator makes digital readout straightforward even on boards without analog inputs, while the analog pin gives detailed moisture levels for threshold‑based projects.
Wiring Notes
Connect VCC to 5V or 3.3V and GND to common ground. Use the DO pin on a digital input for simple rain/no‑rain detection, adjusting the blue potentiometer to set the trigger threshold. For moisture level measurement, connect the AO pin to an analog input. Avoid submerging the entire sensing pad underwater; it is intended for surface rain detection.
Why Buy from Compoden
Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.
Is this compatible with Arduino?
Yes, it works with 5V Arduino boards. Connect DO to a digital pin and AO to an analog pin for full rain detection and level monitoring.
How do I adjust the rain sensitivity?
The module has a potentiometer; turn it clockwise to reduce sensitivity (requires more water to trigger) or counterclockwise to increase sensitivity.
Can the sensing pad be left outside permanently?
While designed for outdoor use, prolonged exposure to UV and dust can degrade the nickel coating. Cover or remove when not in use to extend sensor life.
📦 Free Setup Handoff Document Included
Every Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.
Ask Soldr above what you can build with this — it knows every Compoden kit this part appears in.
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items