In college and educational institutions, manual operation of the college bell is still common, which may lead to delays, human errors, and inconsistency in maintaining time schedules. The Automatic college Bell System using Arduino is designed to overcome these problems by automating the ringing of the college bell according to a predefined timetable. This system uses an Arduino microcontroller, Real Time Clock (RTC) module, relay, and buzzer or electric bell to ensure accurate and timely bell operation. The proposed system is simple, cost-effective, reliable, and suitable for schools. It reduces human effort, improves punctuality, and ensures smooth daily academic activities.