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Design And Construction Of A Digital Clock With Calendar
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CHAPTER FIVE
5.0 CONCLUSION
This digital clock is designed to display real time clock and calendar. There were lots of problems encountered while working on this project. These include generating clock signal of 1sec from 4Mz clock signal of the MCU, Synchronizing the timing along with the scanning of the display simultaneously and writing code fired into the microcontroller. Other problems encountered include choice of components, obtaining and interpreting datasheet of components for proper biasing. These problems were solved after due consultation and gathering of information. This device has two displays for the day and date display. These displays are multiplexed with second and year display. These can be viewed when the down button is held down while this device is working. This device consumes less than two watts which means it can be battery operated for a very long time. Error is found to be 3sec after a period of four weeks.
PIC16F877 is a microcontroller will little power consumption, hence gives an advantage in the area of power supply. It is responsible for the control of the clock and could be reprogrammed many times for different time schedules. Two sources of power supplies can be used to power this device, the mains and back up battery.
The project has really broadened my knowledge in electronics and I believe Nigerian engineering students can really do a lot in uplifting the image of the great nation in terms of Engineering/Technology.
5.1 RECOMMENDATIONS
This device only measures time with calendar functions. In future, it can be designed to display the day of the week, i.e. Monday, Tuesday, and Wednesday etc along with alarm function. Tones to indicate time of the day can also be included. A real time clock module can be incorporated in future and the display can be changed to LCD for more power saving and hence long duration operation. Sub-systems such as fault diagnostics could be incorporated into the design. Proper diagnostic routines will facilitate fast and reliable recovery of facility equipment.
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ABSRACT - [ Total Page(s): 1 ]ABSTRACT This project is aimed at explaining the Design and construction of a digital wall clock with calendar. It give report on how we can achieve this aim and the primary objective of this work is to bring a vibrant digital clock display to everyone located within the vicinity where the clock is being installed, and the importance of clock is to tell time and date, so you can meet up with events and assignments, these are just few importance of CLOCK. In developing countries, time is a ... Continue reading---
APPENDIX A - [ Total Page(s): 3 ]APPENDIXROUTINE PROGRAME THAT HANDLES COUNTINGPROGRAMMING CODE ... Continue reading---
LIST OF TABLES - [ Total Page(s): 1 ]LIST OF TABLE Table TABLE: 2.2.3 CONVERTING DIGITS TO SEVEN SEGMENT DISPLAY BITS TABLE 4.2: VOLTAGE REGULATOR TEST RESULT ... Continue reading---
LIST OF FIGURES - [ Total Page(s): 1 ]LIST OF FIGURESFigure FIG.1.0 THE PIC16F877 INTERNAL STRUCTURE FIG 2.0 BLOCK DIAGRAM OF A DIGITAL CLOCK WITH CALENDAR DISPLAY FIG. 2.2.1 POWER SUPPLY UNIT FIG. 2.2.2 MICROCONTROLLER UNIT FIG2.2.3 SEVEN SEGMENT DISPLAY FIG 2.2.4a MASKING OF SEVEN SEGMENT DISPLAY FIG 2.2.4b SCANNING AND MULTIPLEXING OF SEVEN SEGMENT DISPLAY FIG 3.0 BLOCKS DIAGRAM OF THE STAGES IN DIGITAL CLOCK WITH CALENDAR FIG 3.1 CIRC ... Continue reading---
TABLE OF CONTENTS - [ Total Page(s): 1 ]TABLE OF CONTENT Title Page Certification Dedication Acknowledgement Abstract Table of Contents List of Table List of Figure CHAPTER ONE1.0 INTRODUCTION 1.1 BRIEF DISCUSSION ON CLOCK 1.1 AIM 1.2 OBJECTIVES 1.3 UNITS OF THE SYSTEM 1.3.1 HARDWARE PART 1.3.2 SOFTWARE PART CHAPTER TWO2.0 LITERATURE REVIEW 2.1 HARDWARE COMPONENTS 2.2 STAGES IN ... Continue reading---
CHAPTER ONE - [ Total Page(s): 3 ]ï¶ Counting unit;Each unit of the clock is linked to a general purpose register for counting purposes. There is a routine program that handles counting up for each of the clock units (refer to appendix for codes of routine program). The time taken for each increase is determined in the routine handling it. The output of each counter is binary and therefore needs to be converted to seven segment display format. Another routine is program to handle this (refer to appendix for routine pro ... Continue reading---
CHAPTER TWO - [ Total Page(s): 6 ]CHAPTER TWO3.0 LITERATURE REVIEWThis project is an embedded system that uses a microcontroller to achieve the required functions. This device operates by running a software program burn into its flash memory, this is divided into loops, and each loop has it specific function. These loops are labeled counter, decoder and display scanner.In this project, I have built a digital clock with 24 hour count time. The clock runs from 00:00 to 23:59 and then back to 00:00. The display has two four d ... Continue reading---
CHAPTER THREE - [ Total Page(s): 6 ]ROM is used to permanently save the program being currently executed. This is why it is often called a ‘program memory’. The PIC16F877 has 8Kb of ROM (8192 locations in total). Since ROM is made with FLASH technology, its contents can be easily changed by providing a special programming voltage (13V).No further explanations are required as the whole process is performed automatically by means of a special program installed on the PC and a simple electronic device called the programm ... Continue reading---
CHAPTER FOUR - [ Total Page(s): 3 ]CHAPTER FOUR4.0 THE CONSTRUCTION After proper design and calculations for each stage, the components were obtained and connected together on a breed board and tested to ensure that the circuit connections were okay before it was transferred to the vero-board and soldered. The construction of each unit was carried out stage by stage with proper testing after each completion. The construction started from the power supply unit to the visual display unit and the casing.During soldering, ... Continue reading---
REFRENCES - [ Total Page(s): 1 ]REFERENCESEvans C. H. (2007) Amplifiers (Electronics) New York, van Nestraud Rinold, New York. Hughes E. (2003): Hughes Electrical, 6th Edition. Harlow Longman scientific and technology.Integrated Electronics, M. C. Grewhill book by Robert B. S. Company (2008) Ivo Adanand Jacques Resing, The Queueing theory (2002), Department of Mathematics and Computer science, Eindhoven University of Technology, Eindhoven, The Netherlands.Paul H. & Winfield H (2000). The Art of Electronics, 2nd edition. Cambri ... Continue reading---
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ABSRACT - [ Total Page(s): 1 ]ABSTRACT This project is aimed at explaining the Design and construction of a digital wall clock with calendar. It give report on how we can achieve this aim and the primary objective of this work is to bring a vibrant digital clock display to everyone located within the vicinity where the clock is being installed, and the importance of clock is to tell time and date, so you can meet up with events and assignments, these are just few importance of CLOCK. In developing countries, time is a ... Continue reading---
CHAPTER FIVE -- [Total Page(s) 1]
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CHAPTER FIVE -- [Total Page(s) 1]
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