Fertigation Dosing Controller Kit with Arduino Uno + Relay: Automate Nutrient Delivery in Smart Farming

Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.

Build an automated fertigation controller that monitors nutrient concentration using a TDS probe and dispenses fertiliser via a submersible pump when levels drop. The system reads electrical conductivity, compares it to a preset threshold, and triggers a relay—scheduled by a real‑time clock—so your crops get timely doses without manual intervention. Ideal for hydroponic trays, greenhouse drip irrigation, or agri‑tech school models, this kit delivers a working prototype of commercial precision nutrient management.

What You'll Build

By the end of this 4–5 hour project, you’ll have a working fertigation controller that displays real-time TDS values on a 16x2 LCD, logs dosing events via the RTC, and drives a mini pump when conductivity drops below your setpoint. The system is modular: you can later integrate soil moisture, pH, or Wi‑Fi logging for a complete smart‑farming dashboard. This isn’t just a blinking LED—it’s the foundation of automated nutrient management for crops like tomatoes, lettuce, or cannabis in controlled environments.

What You'll Learn

• Interfacing a TDS/EC sensor to read nutrient concentration and convert analog signals to ppm or μS/cm
• Programming a relay module to safely switch a 5V pump using an Arduino digital output with a flyback diode
• Using a DS3231 RTC to schedule dosing cycles and timestamp events, essential for time-based automation
• Displaying sensor data on a 16x2 LCD with I2C backpack, reducing wiring to just four connections

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

This intermediate kit is designed for Class 11–12 CBSE students building agri‑tech models for science exhibitions, B.Tech ECE/EEE undergraduates tackling Smart India Hackathon or final‑year projects, and hobbyists running hydroponic setups who want a programmable nutrient controller without engineering a PCB from scratch. ATL tinkering labs and polytechnic workshops will also find it a rich introduction to sensor‑actuator loops.

Built and Backed by Compoden

Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.