Arduino-Operated Fog Disinfectant Hand Washing Device

Since the onset of the COVID-19 pandemic in the modern world, regular handwashing, often multiple times a day, has been strongly advised and is being followed by everyone. This practice, however, results in significant water wastage, which poses challenges that may surpass those of the pandemic itself. To mitigate this issue, we have developed a solution that enables handwashing with reduced water consumption. With the help of the Arduino, we have developed a devise which employs a fog-based system to promote water efficiency. It features an integrated tank located directly beneath the unit, where a safe herbal disinfectant solution is mixed with water before being sealed. When a user places their hands near the UV sensor the sense the hand, while an Arduino Uno microcontroller monitors the distance, triggering the pump to dispense the hand sanitizer. This automated dry handwashing machine utilizes fog disinfection and can be used as an alcohol-based hand sanitizer dispenser, making it suitable for use in hospitals, workplaces, offices, schools, and more. Alcohol serves as an effective disinfectant compared to liquid or solid soaps, as it does not require water for rinsing due to its volatile nature, evaporating quickly upon contact with the skin. Research confirms that an application of over 40% alcohol can effectively eliminate the virus from hands.