2 LITERATURE REVIEW
5 2.1 PIC16F877A Microcontroller
5
2.2 DC Motor Circuit 8
2.3 Coin Acceptor Module 12
2.4 Pull Up and Pull Down Resistors 14
2.5 Power Supply Circuit 2.6 LCD Display
15 16
3 METHODOLOGY AND SYSTEM DESIGN
19 3.1 Flowchart of Methodology
20 3.2 System Design
23 3.2.1 Plate Dispenser System
24 3.3 Printed Circuit Board PCB
26 3.3.1 Rules of PCB design
27 3.3.2 PCB Design Flow
29 3.3.3 PCB Verification
31 3.3.4 PCB Fabrication
32
4 RESULTS AND DISCUSSION
38 4.1 Schematic
38 4.1.1 PIC16F877A
38 4.1.2 DC Brush Motor
44 4.2 Expected Result
46 4.3 PIC To Control The Output
48 4.4
Final Product 48
4.5 Discussion 50
5 CONCLUSION AND SUGGESTION
5.1 Conclusion 51
5.2 Suggestion for Future Work 52
REFERENCES
53
LIST OF TABLE
NO TITLE
PAGE
2.1 Features of PIC16F877A
7 2.2
Coin Acceptor Existing Technologies 12
3.1 Standard Design Rules of PCB Layout Design
27 4.1
Pin Configuration 40
4.2 Expected result of the project.
46
LIST OF FIGURE
NO TITLE
PAGE
2.1 PIC16F877A
6 2.2
2-pole DC electric motor 9
2.3 PWM Pulse Width Modulation 10
2.4 Coin Acceptor
13 2.5
a: Pull-down resistor 14
b: Pull-up resistor 14
2.6 Voltage Regulator 5V Circuit
15 2.7 Pin configuration and symbol for voltage regulator 7805
15 2.8
LCD Display 16
2.9 Connecting an LCD display to a microcontroller
18 3.1
Flowchart methodology of the project 19
3.2 Block Diagram of Plate Dispenser
23 3.3
Flowchart of Plate Dispenser System 25
3.4 PCB Design Flow
29 3.5
Printed PCB Layout to Transparent paper 32
3.6 Photo Etching Process Step 1
33 3.7
Photo Etching Process Step 2 33
3.8 Photo Etching Process Step 3
34 3.9
Photo Etching Process Step 4 35
3.10 Photo Etching Process Step 5
36 3.11
Drilling Process 36
3.12 Soldering Process
37 3.13
Soldering Process 37
4.1 PIC16F877A microcontroller schematic
41 4.2
Top layer of the PIC16F877A PCB 42
4.3 Track of the PIC16F877A PCB design
43 4.4
Schematic of DC motor circuit 44
4.5 Top layer of the DC motor PCB
45 4.6
Track of the DC motor PCB design 46
4.7 Overview of the whole system 47
4.8 Final Product of Plate Dispenser
48 4.9
Side view of the machine 49
LIST OF SYMBOLS AND ABBREVIATIONS
CPU - Central Processing Unit DC - Direct Current
EEPROM - Electrical Erasable Programmable Read Only Memory IO - Input Output
LCD - Liquid Crystal Display LED - Light Emitting Diode
MOSFET - Metal Oxide Semiconductor Field Effect Transistor PCB - Printed Circuit Board
PIC - Programmable Interrupted Controller PSM - Projek Sarjana Muda
RAM - Random Access Memory
LIST OF APPENDICES
NO TITLE PAGE
A Project Planning 54 B Source Code For PIC16F877A 56
C PIC16F877A Datasheet 71
CHAPTER I
INTRODUCTION
1.1 Project Overview
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