Publication: Jam penggera digit berdasarkan micro-pengawal pic
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Date
2005-03-01
Authors
Wong, Echor
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Abstract
Although digital alarm clock have been around for years, most of today’s off the shelf products suffer from serious design limitations. For example, many do not keep track of weekdays (Sunday to Saturday) and can only store one alarm time. The project proposes a solution for the design weaknesses of the alarm clock by using a low-cost circuit based on the popular PIC 16F84A microcontroller from Microchip. The digital alarm clock keeps track of weekdays and has eight alarms that can be individually set to go off every day, only on working day or on a specific day of the week. The eight different alarm times are kept in the PIC’s EEPROM. So, the user would not have to adjust any of the alarms again even if the battery fails. Like all good digital alarm clocks, this project has a battery that keeps the clock ticking in the event of an AC-power failure. And the 4-MHz crystal oscillator guarantees a pretty accurate timebase for the clock.