This device can be used in the SCHOOLES and COLLEGES for automatic period bells and it replaces the Manual Switching of the Bell in the College. In this we can set different 24 no off alarms, and We can give delay time or ring time for each alarm, When real time equals to the Bell Ringing time, then the Relay for the Bell is switched on, The Bell Ringing time can be edited at any Time, so that it can be used at Normal Class Timings as well as Exam Times. The Real Time Clock is displayed on LCD display. Microcontroller is used to control all the Functions, it get the time through the keypad and store it in its Memory. And when the Real time and Bell time get equal then the Bell is switched on for a predetermined time. And also operate in manual mode.