Design and Implementation of Anti-Loss Device Based on Ultrasonic Ranging

In today's fast-paced modern life, individuals frequently misplace essential items, such as keys, mobile phones, and wallets, due to negligence. This not only leads to financial losses but also causes mental stress and numerous inconveniences. To effectively address this issue, designing an efficient and practical anti-loss device is of paramount importance. This project endeavors to create an ultrasonic ranging system, anchored on a microcontroller, that seamlessly integrates an audible buzzer and visual LED alert. When the measured distance exceeds a predefined threshold, the system promptly triggers both alarms, effectively mitigating the risk of losing targeted objects and providing users with peace of mind.