Support of process learn to teach at technological era claim all process learn to teach to enter in management of quality Pra-In-Post of learning process have to be certifiable. Certifiable of learning process will be seen by when process start and end it timely, do not quickly do not be late also. Bell represent the fatal and vital suggestion for the school of. Seen to by trifle, but if duty to sound the bell is not conducted with the high discipline, hence PBM will be annoyed. To avoid this matter, is hence needed by Bell which can by automation will sound when PBM start nor end the Automatic School Bell is appliance of timer of schedule bell automatically. This appliance is very good used to arrange schedule in school, office, and factory.