Introduction

In today’s world, automation and hygiene have become essential, especially in public places like hospitals, malls, and offices. This project presents an Arduino-based Mist Maker and Hand Dryer system with a 16×2 LCD Display, designed to improve user convenience and maintain hygiene by minimizing physical contact.

For Full Project:

https://electronicsworkshops.com/2025/05/18/arduino-based-mist-maker-and-hand-dryer/

The system uses an ultrasonic sensor to detect the presence of a hand. Upon detection, it automatically activates both a mist maker, which adds moisture to the air, and a DC fan, which acts as a hand dryer. The status of the system is displayed on a 16×2 LCD screen, making the operation user-friendly and easy to monitor.

This project combines basic electronic components with Arduino programming to create a simple, low-cost, and effective automated solution. It is ideal for learning automation, sensor integration, and LCD interfacing, and can be extended for various hygiene-based applications in real-world environments.

Working Principle of Arduino-based Mist Maker and Hand Dryer

The Arduino-based Mist Maker and Hand Dryer operates using a sequence of sensor-based actions, controlled through programmed logic. The following outlines the working principle:

Working Principle of Arduino-based Mist Maker and Hand Dryer

System Initialization:

The system starts and enters an idle state, waiting for user interaction. A message is displayed prompting the user to place their hand near the sensor.

Hand Detection:

An infrared (IR) proximity sensor continuously monitors for the presence of a hand. Once a hand is detected within a certain range, the system transitions to the sanitization phase.

Mist and UVC Activation:

Upon hand detection, a timer is initiated. Simultaneously, the mist maker and UVC light are activated. The mist acts as a sanitizer, while the UVC light provides additional sterilization by eliminating microorganisms on the hands.

Timer Control:

The system continues the misting and UVC sterilization for a predetermined time interval, ensuring effective sanitization. If the hand is removed prematurely, the system resets.

Fan Activation (Hand Dryer):

After the timer expires, the mist and UVC light are turned off, and the fan is activated. The fan blows air to dry the sanitized hands, completing the hygiene process.

System Reset:

Once the hand-drying process is complete, the system returns to the initial state, ready for the next user interaction

DIY Prototype

Youtube Link

Conclusion

The Arduino-based Mist Maker and Hand Dryer system is an automated, contactless hygiene solution that integrates ultrasonic sensing, mist spraying, UVC disinfection, and drying mechanisms. Controlled by an Arduino UNO, the system detects the presence of a hand using an ultrasonic sensor, activates a mist maker and UVC LED for sanitization, and then operates a fan for drying—ensuring efficient and touch-free hand cleaning. This project combines automation, safety, and hygiene, making it ideal for public places and healthcare environments.

For Full Project:

https://electronicsworkshops.com/2025/05/18/arduino-based-mist-maker-and-hand-dryer/