Design of Novel Time Monitored Touchless Operation using 555 Timer for Automatic Dispenser

This paper proposes a practical, low-cost circuit for the operation and control of a final control element (valve). The circuit presented in the paper uses an Infrared (IR) proximity sensor for object detection for triggering and 555 timer IC for precise time monitoring. The proposed system is intended to be used in soap and sanitizer dispensers installed at public places in this case in the university premises to assess the effectiveness. It may be proved very effective in mitigating the risk of the spread of Covid-19 due to the soap and sanitizer dispensers used at public places and the time monitoring capability of the proposed design allows the end-user to ensure the World Health Organization (WHO) guidelines for hand hygiene. Finally, theoretical concepts are validated using experimental results presented in the paper.