This project design is simply used to display the items demanded by each customer on the table. Each table has four buttons for Rice, beans, amala and akpu, and each of the buttons are connected to the processor. The customers on every table presses the button with the label of the item he or she needed. Then, a screen in the kitchen is used to display the table number and the items demanded. The major components used in this design are 8951 microprocessor, crystal oscillator, Electronic switches, Light emitting diodes, Buffer (74244), 3-8 lines decoder (74138), electronic switches and
some other common and readily available components.
TABLE OF CONTENTS:
CHAPTER ONE
1.1 INTRODUCTION
1.2 MOTIVATION
1.3 PROBLEM DEFINITION / METHODOLOGY
1.4 PROJECT
OUTLINE
2.1 COMPONENT DESCRIPTION
2.2 THE REGULATED POWER SUPPLY
2.2.1 STEP DOWN TRANSFORMER
2.2.2 THE RECTIFIER CIRCUIT
2.2.3 CAPACITOR FILTER
2.2.4 THE REGULATOR
2.3 THE CONTROLLING SECTION
2.3.1 8951 MICRO CONTROLLER
2.3.2 CRYSTAL OSCILLATOR
2.4 THE DISPLAY SECTION
2.4.1 THE LEDS MATRIX
2.4.2 THE 3-8 LINE DECODER (74138)
2.4.3 THE BUFFER (74244)
2.5 THE SWITCHING SECTION.
CHAPTER THRE
3.1 DESIGN ANALYSIS
3.2 THE REGULATED POWER SUPPLY
3.2.1 RECTIFICATION
3.2.2 FILTERING
3.2.3 REGULATION
CHAPTER FOUR
4.1 DESIGN CALCULATION AND CHOICE OF COMPONENT
4.2 CALCULATION ON POWER SECTION
4.1.1 CALCULATION ON TRANSFORMER
4.1.2 CALCULATION ON RECTIFICATION
4.2.3 CALCULATION ON FILTERING
4.3. CALCULATION ON THE CONTROL SECTION
CHAPTER FIVE
5.1 CONSTRUCTION, TESTING AND RESULTS
5.2 CONSTRUCTION
5.3 TESTING
5.5 PROBLEMS ENCOUNTERED
5.6 PRECAUTIONS
CHAPTER SIX
6.1 PACKAGING, CONCLUSION AND RECOMMENDATION
6.2 PACKAGING
6.3 CONCLUSION AND RECOMMENDATION
6.3 SUGGESTION FOR FURTHER WORK
APPENDIX A
THE CONTROL PROGRAMME