The Electronic Bell Ver. 2” is automatic audio bell which can produce “Ding Dong” sound as periodic bell at diﬀerent given time inputs. No mechanical Bell is required in this system. But output of this system should be connected to sound amplifier system to get sound in the class room.
It has four switches:
1. Time set: this is used for setting time.
2. Shift (up and Down): this is used to increase or decrease the time of the system.
3. OK : this switch is for giving ok signal,
It has additional manual switches which can be used in any emergency or immediate need.