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De La Salle Lipa
College of Information Technology and Engineering
Electronics Engineering Department

PC – Based Lighting and Fan System

Gesmundo, Kaycee Kimberly S.
Marquez, Mark Aries J.
Mea, Kit Arvin C.
Perez, Omar Mikhail I.
Tirones, Jefferson A.
Umali, Max Oliver M.

T4A

March 2012

Engr. Robert G. De Luna
Instructor

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Table of Contents

page
I. Introduction

1

II. Physical Description

2

III. System Operation

3

IV. System Specification

4

V. List of Components

5

VI. Schematic Diagram

6

VII. PCB Layouts and Parts Placement

7

VIII. System Simulation

8

IX. Conclusion

8

X. Recommendation

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Appendices

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List of Figures
page
Figure 1. Physical Appearance

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Figure 2. GUI of lighting and fan control system

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Figure 3. Block Diagram

4

Figure 4. Power Supply’s schematic diagram

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Figure 5. Dark Detector’s schematic diagram

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Figure 6. Thermistor circuit’s schematic diagram

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Figure 7. Power Supply’s PCB layout and parts placement

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Figure 8. Dark detector’s PCB layout and parts pla cement

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Figure 9. Thermistor circuit’s layout and parts placement

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Figure 10. LED light’s response to the environment’s light

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List of Tables
page
Table 1. Dimensions of circuit boards

2

Table 2. Components

5

Table 3. Dark Sensor testing

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Table 4. LED intensity and GUI display summary (Room 1)

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Table 5. Thermistor circuit testing

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I. Introduction

Room management means to put a room in order for optimum use. It also involves the maintenance of the room’s cleanliness. However, more than just maintaining its order, it also includes monitoring of the room’s electrical components such as lights and fans.

As we approach the age where automation becomes fashion and
everything seems to be automatic, systems for lighting controls are created. A lighting control system consists of a device that controls electric lighting and devices, alone or as part of a daylight harvesting system, for a public, commercial, or residential building or property, or the theater. Lighting control systems are used for working, aesthetic, and security illumination for interi or, exterior, and landscape lighting, and theater stage lighting productions. They are often part of sustainable architecture and lighting design for integrated green building energy conservation programs.

A control system is a set of devices to manage, command, direct or regulate the behavior of other devices or system. Control systems are intimately related to the concept of automation. There are two types of control syste ms: open-loop system and close-loop system. The close-loop system contains the feedback path while the other does not.

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II. Physical description
The project is a miniature of a building with four rooms, each with an area of 10in x 10 in. However, only three rooms are controlled by the system. The circuit boards are placed in the ceiling. Lights and fans are placed at the ceiling and on the walls, respectively.

Figure 1. Physical Appearance

There are separate circuit boards for dark sensor, thermistor circuit and power supply. The dimensions are as follows:
Table 1. Dimensions of circuit boards
Power Supply

2 in x 1in

Dark Sensor

1.875 in x 1 in

Thermistor circuit

1.375 in x 1.625 in

The control system is PC-based, therefore it requires the use of graphical user interface or GUI. The image below shows the GUI of the lighting and fan control system.

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Figure 2. GUI of lighting and fan control system

III. System Operation
The project is a PC-based lighting and fan control system. It used the Gizduino microcontroller as the interfacing component between the PC and the input/output. The Gizduino basically reads voltages from the sensors and fed to Matlab.

It is also composed of sensors and actuators. The sensors are dark sensor and heat...
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