Abstract: In the context of recurrent outbreaks of infectious diseases, protecting public health has emerged as a paramount concern. The smart tag is a small, wearable device expertly engineered to provide safe spacing between individuals in congested settings. The system integrates an Arduino Uno microcontroller, an ultrasonic sensor, an LED, and a buzzer to establish an efficient proximity alarm system. The ultrasonic sensor quantifies the distance between humans. And if an individual encroaches upon the designated unsafe range, the device promptly activates alarms via visual (LED) and audio (buzzer) messages. This allows users to quickly implement corrective actions in order to maintain a sufficient amount of space between themselves and others. The system is designed with portability, cost-effectiveness, and a lightweight construction in mind. This makes it very accessible for everyday use in a wide range of contexts, including schools, hospitals, businesses, and other public spaces. It has the potential to greatly reduce the risk of illness transmission by promoting awareness and adherence to social distancing practices. This Social Distancing Smart Tag combines technical innovation with public safety in order to provide a proactive and realistic strategy for preventing sickness. This initiative serves as an example of the intersection of innovation and societal demands, addressing current public health challenges through the use of technology that is both accessible and dependable.

Keywords: Arduino Uno, Ultrasonic sensor, Social distancing, Smart tag, Microcontroller.

Downloads: | DOI: 10.17148/IJIREEICE.2025.13913