Smart Irrigation System – Soil Moisture Sensor & Water Pump Kit

Overview

The Smart Irrigation System Kit is a complete, hands-on automatic plant watering project kit designed for Arduino enthusiasts, STEM education, smart agriculture prototypes, and DIY electronics makers. This all-in-one package provides everything required to build an automated soil-moisture monitoring and irrigation system: a corrosion-resistant soil moisture sensor probe, a comparator control module, a 5V relay switching module, a submersible mini DC water pump, and 1 meter of flexible silicone tubing. When the soil moisture drops below your desired threshold, the circuit automatically activates the water pump to nourish the plant, switching off once optimal moisture is reached. It serves as an engaging, practical introduction to analog sensing, relay actuation, and automated feedback loops.

Key Features

• Automated Plant Hydration: Detects soil drying in real time and automatically triggers the mini pump to keep plants healthy without manual intervention.
• Adjustable Sensitivity Threshold: Onboard potentiometer on the sensor control module allows precise calibration for different soil types and plant water requirements.
• Complete Hardware Bundle: Includes the sensor probe, comparator board, 5V relay module, DC mini submersible pump, and water tubing in a single affordable kit.
• Dual Output Flexibility: Provides both an analog voltage output (for microcontroller ADC reading) and a digital switching output (for direct relay triggering without coding).
• Safe Low-Voltage Operation: Powered completely by 5V DC, making it safe for classroom STEM demonstrations, student labs, and home indoor gardens.
• Standalone or Microcontroller-Driven: Can run as an independent automated analog circuit or be interfaced directly with Arduino, ESP32, or Raspberry Pi.

Technical Specifications

• Operating Voltage: 3.3V – 5V DC
• Soil Probe Type: Resistive dual-electrode fork probe
• Comparator IC: LM393 dual voltage comparator
• Sensor Outputs: Digital switching output (DO) + Analog voltage output (AO)
• Relay Specifications: 1-Channel 5V Relay (supports switching loads up to 10A 250V AC / 10A 30V DC)
• Water Pump Type: Mini DC submersible centrifugal pump (3V – 6V DC operating range)
• Pump Flow Rate: Approx. 80 – 120 L/hour
• Water Lift (Head): Approx. 0.4 – 1.1 meters
• Tubing: 1-Meter transparent flexible vinyl/silicone hose (approx. 7mm outer diameter)
• Status Indicators: Red power LED and green relay/digital output trigger LED

Applications & Use Cases

• Smart Gardening & Houseplant Care: Automated vacation watering system for indoor plants, herbs, and balcony planters.
• STEM & Robotics Education: Practical educational module for teaching sensors, operational amplifiers, relays, and feedback control.
• IoT Smart Agriculture Prototypes: Connect to ESP32 or ESP8266 to push soil moisture metrics to Blynk, Home Assistant, or Adafruit IO.
• Graduation & Science Fair Projects: Foundational starter kit for environmental monitoring, green robotics, and automated greenhouse models.

What's Included

• 1 × Soil Moisture Sensor Fork Probe
• 1 × LM393 Comparator & Sensitivity Adjustment Board
• 1 × 1-Channel 5V Relay Module with Optocoupler
• 1 × Mini Submersible DC Water Pump (3V–6V)
• 1 × 1-Meter Flexible Water Tubing
• 1 × 5-Pin Dupont Jumper Cable Set for interconnection

Compatibility

• Microcontrollers: Fully compatible with Arduino (Uno, Nano, Mega), ESP32, ESP8266, NodeMCU, Raspberry Pi, and Micro:bit.
• Power Sources: Works with standard 5V USB power banks, 5V wall adapters, or 4xAA battery packs.
• Standalone Mode: Can operate autonomously without any microcontroller by wiring the digital output (DO) directly to the relay module trigger pin.

MOKWN Recommendation

The Smart Irrigation Kit is one of the most rewarding and practical electronics starter kits you can build. It solves a real problem — keeping your houseplants alive while you're away — while teaching you the fundamentals of sensor calibration and actuator control. For Egyptian makers and students looking to take this further, we recommend pairing this kit with an ESP32 board from MOKWN so you can monitor your plant's moisture remotely from your smartphone over Wi-Fi. Order today with fast delivery across Egypt!