🚰 Touchless Water Tap System Using FPGA

Overview

This project implements a Touchless Water Tap System using FPGA and Verilog HDL, aimed at promoting hygiene by eliminating the need for physical contact. The system uses an IR proximity sensor to detect the presence of a hand. If a hand is detected for at least 1 second, a centrifugal pump is activated to dispense water. Once the hand is removed, the pump remains ON for an additional 2 seconds to ensure smooth operation and avoid wear caused by frequent switching.

This design is ideal for smart public utilities, bathrooms, hospitals, or anywhere contactless interaction is beneficial.

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🔧 Features

• 🚫 Touchless Operation using IR Sensor
• ⏱️ 1-second detection delay to avoid false triggering
• 🕒 2-second hold time after sensor deactivation for smoother water flow
• ⚙️ FPGA-controlled pump activation using Verilog
• 🔌 Centrifugal Pump controlled via Relay
• 🔄 Debounced and glitch-free control logic
• 🔐 Protects the pump from rapid on/off switching

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🧠 Working Principle

1. The IR sensor continuously monitors for hand presence.
2. If a hand is detected for 1 second or more, the FPGA sends a signal to activate the pump.
3. The pump remains ON as long as detection continues.
4. Once the detection stops, a 2-second timer ensures the pump remains ON briefly before shutting off.
5. This ensures smooth water flow, avoids motor damage, and improves overall system performance.

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📦 Components Used

• IR Proximity Sensor Module
• Centrifugal Water Pump
• Relay Module
• FPGA Development Board (e.g., Xilinx Spartan-6 / Intel Cyclone IV)
• 5V/12V Power Supply
• Verilog HDL for logic design
• Simulation tools like Vivado

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🛠️ Tools & Technologies

• Verilog HDL
• Xilinx Vivado
• FPGA Board
• Basic Digital Design principles

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📷 System Block Diagram

Note: Replace this with your actual system block diagram or a photo of your hardware setup.

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✅ Future Improvements

• Add automatic timeout if the sensor remains active too long
• Support multiple sensors for multi-tap systems
• Integrate water flow sensors for precision control
• Use low-power FPGAs for better energy efficiency

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🤝 Contributing

Pull requests are welcome! For major changes, please open an issue first to discuss what you'd like to change.

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🙌 Acknowledgements

Special thanks to SSIT Mentor TEJESH Sir and peers who provided feedback and support throughout the project.