Smart Trash Can Auto-Open Plus Kit - Build a Touchless Water Level Monitor for Hydroponics with Arduino Uno

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

For hydroponic growers, knowing the reservoir water level without lifting lids or dipping hands is a daily requirement. This kit transforms an Arduino Uno and an HC-SR04 ultrasonic sensor into a non-contact monitoring system that displays fill status on an LED bar graph and sounds a buzzer when water drops critically low. Whether you maintain a classroom NFT setup or a home deep-water culture tank, you will have a reliable, automated alert that keeps your plants thriving.

What You'll Build

A compact, Arduino-driven water level monitor that mounts over your hydroponic tank. The HC-SR04 sensor measures distance to the water surface and controls five LEDs that light progressively - one LED for near-empty, three for mid levels, and all five when the reservoir is full. An active buzzer activates when water falls below a safety threshold you define in code, so you never miss a refill.

What You'll Learn

• Interface an HC-SR04 ultrasonic sensor with Arduino Uno and read precise distance data
• Program conditional LED bar graph output that maps sensor distance to fill level
• Calibrate sensor thresholds to match your specific reservoir depth and shape
• Implement a buzzer alarm circuit triggered by a critical low-water event

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Ideal for CBSE Class 11-12 students tackling sensor-based automation projects, B.Tech ECE/EEE first-year lab work, Smart India Hackathon prototypes in the agriculture track, and ATL Tinkering Lab setups. Also perfect for home hydroponic enthusiasts who want a DIY water level alert without complex wiring. The board and components are robust enough for repeated experiments and demonstrations.

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.