PROJECT TOPIC: DESIGN AND CONSTRUCTION OF A DIGITAL CLOCK
CHAPTER ONE
INTRODUCTION
1.0 Background of Study
Digital clock is very useful projects for final year students.. It has an Inbuilt Real Time Clock which tracks over the Real Time. It displays the time in hh:mms format. The time and date can be changed at any Time using the switch. The Real Time Clock is displayed on LCD display.
A digital timing circuit (digital clock) is something we use and depend on every day. The timing circuit used in this project will be entirely hardware based. It will consist of two timing signals, a 60Hz clock pulse used as the main timing signal (multiples of 60s) and a 1kHz clock pulse used for multiplexing a 7-segment display for the clock. The 60Hz clock pulse will be divided by sixty multiple times in order to provide a pulse for seconds, minutes and hours. These pulses will be counted, stored in memory registers and then displayed to show the current time. Time is not paramount but also pivotal to human life, throughout history, time has always intrigued mankind. From the days of judging by the position of the sun, to today’s most accurate time piece, the atomic clock, time has. without exception been one of life’s constant. By watching the length of shadows cast by the sun, man realized that the shadow was a more accurate way to tell time, rather than judging by the position of the sun. As time progressed, other means of measuring time evolved and the quest for accuracy began. The sundial was the earliest and was used well into the eighteen century. It was followed by the clepsydra (water clock) and then the sand glass. The Escarpment was next, then the pendulum clock. The creation of modern case and dial for clock; clock towers with bells to clime different melody everyday (i.e. digital clock) and the atomic clock were the other evolution after the pendulum.
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