<p>➀ The Senior Pillbox is a low-cost electronic system designed to automate medication reminders for elderly or home-bound patients using 555 timers and a CD4017 counter; </p><p>➀ It provides both visual (daily LED indicators) and audio alerts, with adjustable intervals (24-hour cycles) and a 10-second alert duration, isolated via an optocoupler to reduce noise irritation;</p><p>③ The prototype demonstrates a simplified 10-second interval for testing, requiring minimal setup beyond weekly pill refilling and continuous power supply.</p>