Hand Dryer For Washroom Project

Abstract

The Hand Dryer for Washroom Project is an automatic, sensor-based system designed to dry hands quickly and hygienically without physical contact. Using an infrared proximity sensor, blower motor, and microcontroller, the system detects hand presence and activates a warm air blower. This touchless dryer promotes hygiene, reduces paper waste, and is suitable for use in public restrooms, offices, malls, and homes.

Objectives

• Design an automatic, touch-free hand drying system.

• Use infrared or ultrasonic sensors to detect hands.

• Activate blower only when hands are detected.

• Minimize energy usage and promote hygiene.

Components Used

• Infrared Proximity Sensor or Ultrasonic Sensor

• Blower Motor / DC Fan / Heating Coil

• Relay Module

• Microcontroller (Arduino Uno / ESP32)

• Power Supply

• Enclosure for mounting

• Indicator LED (optional)

Working Principle

When a person places their hands near the sensor, it detects the presence and sends a signal to the microcontroller. The controller activates the blower motor through a relay module. Once the hands are removed, the sensor no longer detects them, and the blower stops automatically. Optionally, a heating coil can be included to produce warm air for faster drying.

Methodology

1. Connect the proximity sensor to a digital input pin of the Arduino.

2. Connect the relay module to control the blower motor.

3. Upload the code that triggers the relay based on sensor input.

4. Test the system by placing hands near the sensor to activate the blower.

5. Secure all components in a housing and ensure safety with insulation.

Applications

• Public washrooms

• Office and school restrooms

• Smart home bathrooms

• Touchless hygiene systems

Future Enhancements

• Add a timer function to control air duration.

• Include temperature sensors to regulate warm air.

• Use solar panels or energy-efficient fans.

• Connect to IoT for monitoring usage and maintenance alerts.

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