Hydroponics pH Monitor Kit with Arduino Uno + LED — Build an IR Intruder Alarm for Your Garden

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

No hydroponics grower wants uninvited guests near their plants. This kit shows you how to build a clever security system using an invisible infrared beam — the same technology found in garage door sensors and motion detectors. With an Arduino Uno and a handful of components, you create a beam barrier that triggers a loud buzzer and flashing red LEDs the moment someone walks through. It’s a practical first project that blends physics, coding, and real-world problem solving.

What You'll Build

A fully functioning infrared intrusion alarm. Place one IR LED and photodiode on opposite sides of your hydroponic setup, power up the circuit, and get instant alerts when the beam is broken. The kit includes two emitter-receiver pairs, so you can protect two separate zones or create a double‑barrier setup for extra coverage.

What You'll Learn

• How IR emitters and photodiodes work together to create a light‑beam barrier
• Using an LM358 op‑amp to condition weak photodiode signals for the Arduino
• Reading digital inputs and controlling outputs (buzzer, LEDs) with Arduino code
• Prototyping on a breadboard and laying out reliable sensor circuits

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

A perfect starting point for young makers (ages 5-15), CBSE Class 6-10 students, and ATL Tinkering Lab participants who want to build their first sensor-based alarm. B.Tech ECE/EEE freshers will appreciate the hands‑on introduction to op‑amp signal conditioning. Even hydroponics hobbyists with no electronics background can follow along — the AI companion removes all guesswork.

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.