DIY 4-Channel Automatic Watering Kit - Capacitive Soil Sensor & 5V Relay Module

Name: DIY 4-Channel Automatic Watering Kit - Capacitive Soil Sensor &amp; 5V Relay Module
Brand: Generic
SKU: SENS-0379
Price: 809.00 INR
Availability: OutOfStock

₹809.00 (Inclusive of all taxes)

Out of Stock

This DIY 4-Channel Automatic Watering Kit provides a complete smart irrigation solution for Arduino, Raspberry Pi, and microcontroller projects. It integrates capacitive soil moisture sensors with a 4-channel 5V relay module and brushless DC pumps for automated plant watering based on real-time soil conditions.

Features

4-channel capacitive soil moisture sensing with 0-3.0V analog output.
Integrated 4-channel 5V relay module for pump control.
Compact brushless DC water pumps rated for up to 300 hours of operation.
Wide 3.3V to 5.5V sensor operating voltage for Arduino/Raspberry Pi compatibility.
Complete kit includes sensors, relays, pumps, and 4 meters of vinyl tubing.

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Description

This kit utilizes a TL555C-based capacitive soil moisture sensor to measure the volumetric water content in soil without direct electrode corrosion. The sensor outputs a 0-3.0V analog signal proportional to moisture levels, which can be read by any microcontroller ADC pin. The integrated 4-channel 5V relay module acts as a switch, activating the low-voltage brushless DC pumps when a dry condition is detected.

The system is designed for low-power operation, with sensor current under 100mA and pump current ranging from 70-120mA. All components are designed for durability, with the pumps offering a 300-hour operational lifespan and the capacitive sensing method providing stable, long-term performance without degradation from soil electrolysis.

Key Features

Capacitive sensing principle prevents sensor corrosion and provides stable long-term readings.
Four independent control channels allow for zone-specific watering schedules.
Fast system response time of ≤1 second for real-time irrigation control.
Optimized performance-to-cost ratio for educational and hobbyist projects.
Low-power design suitable for solar-powered or battery-operated garden setups.
Includes all necessary tubing and connectors for immediate system assembly.

Applications

Automated drip irrigation for home gardens, balcony planters, and indoor herb setups.
Educational platform for learning about sensor feedback loops, relay control, and basic hydraulics.
Integration into smart home or greenhouse monitoring systems using Arduino or Raspberry Pi.
Low-power, off-grid watering solutions for remote planters or agricultural test plots.

Technical Specifications

Item Type	Automatic Watering System Kit
Model Name	4-Way DIY
Sensor Type	Capacitive (TL555C)
Sensor Operating Voltage	3.3V to 5.5V DC
Sensor Output Signal	0 - 3.0V Analog
Relay Module Voltage	5V DC
Pump Operating Voltage	3V to 5V DC
Sensor Working Current	≤ 100 mA
Pump Working Current	70 - 120 mA
Pump Lifespan	Up to 300 hours
System Response Time	≤ 1 second
Primary Materials	Plastic, PCB, PVC (Tubing)

Frequently Asked Questions

What is the operating voltage range for the soil moisture sensors?

The capacitive soil moisture sensors operate on a wide DC voltage range from 3.3V to 5.5V, making them directly compatible with 3.3V logic systems like ESP32 or Raspberry Pi GPIO, as well as standard 5V Arduino boards without requiring a level shifter.

How do I interface the sensors and control the pumps with an Arduino?

Connect the sensor's analog output pin to an Arduino analog input (e.g., A0) to read the 0-3.0V moisture signal. The 4-channel relay module is controlled via digital output pins. Your Arduino sketch should read the sensor value and trigger the corresponding relay to turn its pump ON or OFF based on your defined moisture threshold.

What is the difference between capacitive and resistive soil sensors?

Capacitive sensors, like those in this kit, measure soil moisture by detecting changes in dielectric constant, which prevents electrode corrosion. Resistive sensors measure conductivity between two exposed probes, which can degrade over time due to electrolysis. Capacitive sensors generally offer better long-term stability.

Can the pumps run directly from the Arduino's 5V pin?

No. While the pumps are rated for 3-5V, they can draw 70-120mA each, which exceeds the current rating of a standard Arduino GPIO pin. The pumps must be powered by a separate 5V supply (like a wall adapter or battery pack) and controlled through the provided relay module, which isolates the high-current pump circuit from the microcontroller.