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Programmable school bell timer

 Department: Electrical Electronics Engineering  
 By: usericon mattkings  

 Project ID: 3023
   Rating:  (3.1) votes: 16
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Programmable school bell timer is an equipment used to indicate, keep and co-ordinate time using a microcontroller. Digital timer switches are used to control the operation of electrical devices based on programmed schedule. This project describes a microcontroller based programmable digital timer, based on a PIC16F628A microcontroller that can be programmed to schedule the on and off operation of an alarm system. The alarm is controlled through a relay switch. This timer switch allows one to set both“on” and“off” timer. That means that one can program when one wants to turn the alarm on and for how long it is to be remained on. This design is an aid to our exam timing technique where by the examiner can easily program the exams duration via a keypad on the user control unit to trigger of an alarm as at when due. The sounding of the alarm signifies the end of the exam hence the voicing of"pens up" will definitely be uncalled for.     ...
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