Development of a Disinfecting Fog-Based Hand Wash Machine

Conventional handwashing methods consume considerable amounts of water and often involve physical contact with taps and dispensers, increasing the possibility of cross-contamination in public environments.This paper presents the design and development of a Disinfecting Fog-Based Hand Wash Machine that provides a contactless and water-efficient approach to hand hygiene.The proposed system uses an Arduino UNO as the main controller, an IR sensor for contactless hand detection, and an ultrasonic fogger to generate fine disinfecting fog.A relay and transistor driver circuit are employed to control the fogger operation, while LED and buzzer indicators provide visual and audible status notifications.When a user's hands are detected, the controller activates the fogger to dispense disinfecting fog, reducing the need for conventional water-based handwashing.The hardware circuit simulation has been successfully developed, demonstrating hand detection, automated fogger control, and indicator operation.The disinfection chamber assembly and performance testing are currently in progress.Further testing is required to evaluate fog coverage, liquid consumption, sensor accuracy, response time, and microbial effectiveness.The proposed system aims to provide a convenient, automated, and resource-efficient solution for improving hand hygiene in public and institutional environments.