Abstract
In an elegant phenomenon of the world, mechanical applications are replaced by electronic appliance. Especially digital clocks are smart application due to precisely time display and several types of reasons such as much reliable, free maintenance, portable, elegant outlook, inexpensiveness, tiny size and result accuracyy. Every electronics based modern real life application in any filed is now integrated with the digital calendar to enable the user to keep time and date anywhere at any time. It is often incorporated into all kinds of devices such as transports, traffic signal, radios, televisions, standard ovens, computers, laptop, cell phones and wireless peripheral to intellect the device in the way that would be easily enticed by human mind. Regarding the demand of digital clock, this paper presents graceful design of smart digital clock in a particular way that would not only be able to display time, it has an ability to display day of a week with real time. This research shows an embedded system which is constructed through PIC 16F877A microcontroller, DS1307 RTC and 74LS138 decoder IC.
Highlights
To measure time, something is needed that will repeat at regular intervals
The whole controlling operation is maintained by a PIC 16F877A microcontroller which can set timing condition of DS1307 RTC and read data from the RTC to represent time on 7-segment display
Port B and Port D are declared as output pins that are connected with 7-segment display and base of transistor in order to display real time on the seven 7-segment display
Summary
To measure time, something is needed that will repeat at regular intervals. The earliest references for the measurement of the time are the moon and sun [1]. When the sun and the moon are not visible, it is impossible to know the exact time. Clocks are developed to measure out the time in absence of the sun and the moon. The process of measuring time has progressively become more accurate, and the devices more localized eternally [2]. In this work a smart digital clock is developed which is shows the time operation with am-pm and indicates the day of a week. PIC 16F877A microcontroller indicates a day of a week and am/pm operation with help of decoder 74LS138 IC and LED respectively
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