Programmable school bell timer Department:Electrical Electronics Engineering By: mattkings Project ID: 3023 Rating: (3.1) votes: 16 Price:₦3000 Get the Complete MaterialAbstractProgrammable 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. ...Preview Download Preview +Other Electrical Electronics Engineering project topics and materials you might be interested in»The construction of a 2kva automatic voltage regulator (AVR)»Generation of Constant Power Supply from a DC Source»Design and construction of a digital clock with calendar»Construction of digital AC power controller»A remote controlled AC fan speed regulator using discrete integrated circuit»Remote controlled antenna»The construction of automatic voltage inverter and a battery charger»Design of 2.5kw automatic voltage regulation with seven segment display»Simple sensitive touch alarm»Construction of a car touch intruder alarm»Design and construction of 2KVA inverter»Design and construction of 5kva power inverter»Design and installation of 200 WATT solar power system»Design and construction of an automatic change over switch»Construction of a battery charger