United Arab Emirates University

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United Arab Emirates University College of
Engineering Graduation Projects Unit Electrical
Engineering Department
Design and implementation of a PC-Based Home
Automation System
Faculty advisor Dr. Imad Barhumi
Team members
ID Amal
Abdulla Ali 200309879
Eiman Thabit
200321000 Salwa Al Nuaimi
200202046
Feda' Wasfi
200337271 Hanan Al Kaabi
200203024 Examination Committee Dr.
Ahmed Alawar Dr. Abdulla Ismail Dr. Mousa
Hussein
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Outline

• Project Description
• Objectives
• The framework for the home automation
• The communication
• PC Interface
• Hardware Connection
• Conclusion

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Project Description

• Designing and implementing a PC-Based Home
  Automation (HA) system by
• Power line controlling system
• Controlling home appliances such as lights,
  electric doors, curtain, or any other appliance

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Objectives

• Developing a HA system that gives the user
  complete control over all aspects of his or her
  home
• The automated system will have the ability to be
  controlled from a PC and the Internet.
• Use a computer to turn on and off a light, as
  well as monitor a door
• The real objective is to
• Create a basic framework for a home monitoring
  system

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Connection
Wired HA System
Appliance
PC
RS-232
Microcontroller
Sensor
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The Hardware

• The main components needed to build a prototype
• PC Interface
• RS-232
• Max-232
• Microcontrollers
• Type
• Specification
• Circuit construction
• Sensors
• Light module
• Door module
• Curtain module

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Hardware connection
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Power Circuit

• Power circuit is used to
• Provide the circuit with DC 5 Volts
• Protect the microcontroller and the other parts
  of the circuit

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Power Circuit Components
Resistance
Capacitance
LEDs
Diode
Voltage Regulator
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RS-232 Interface

• RS-232
• An electrical signal, serial digit interface
  standard specifying the electrical
  characteristics of the communication path between
  two devices
• Properties
• Specialize in long range and low data
• Inexpensive
• Portability

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MAX-232

• MAX-232 is used between the serial port of the PC
  and the PIC (Microcontroller)
• It converts the voltage to be suitable to the
  PIC in transmitting case and vice versa to be
  suitable to the serial port in receiving case

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MAX-232 Components
RS-232 (DB 9)
Resistance
MAX-232 chip
Capacitance
RS-232
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TEST MAX-232

• A hyperterminal program is used
• Under Windows, hyperterminal' program normally
  located under Programs-gtAccessories-gtCommunication
  s.

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Steps to run hyper terminal program
1-Name the connection.
2-Change some properties in the hyper terminal
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Microcontroller

• Its computer on a chip, containing a processor,
  memory, and other functions
• Microcontroller consists of
• Processor that executes programs digitally
• All instruction given to the processor should be
  in digital form
• I/O Port to connect sensor, keypad, LED, Relay
  and Timer to count the time to execute some
  process.

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PIC16F877A Microcontroller

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Microcontroller Specification

• The specification for PIC16F877A
• Microcontroller is very easy to
• Assembly
• Program
• Low cost
• One unit of PIC 16f877 can be programmed and
  erased so many times.( about 10 000 times).

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Connection
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Programming a PIC

• Two things are needed to program a PIC
• A Programmer
• This is the hardware that programs/writes/burns
  the program into the chip
• A Software
• compiles or converts your program written in
  C/Assembly into a HEX file
• PICBASIC is the program used in our project

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Different types of programmers
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• A programmer can be built in the lab
• For accurate results and to save time
• ready programmers is used

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Programming a PIC

• Three steps process to program microcontrollers
  are
• Write the code
• Compile the code
• Upload the code into a microcontroller

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Specific Controls

• A home needs to make it smart ? Intelligent
  control
• Specific controls are chosen such as
• Control of Lights
• On/Off
• Door Monitoring
• Monitor the open/closed status of door
• C. Curtain control
• open/close the blinds of your home
• Make sure doors are being kept closed, lights are
  being turned off

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Light Module Part1

• Digital Control of Light with On/Off options

LDR
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Light Dependent Resistors

• LDRs or Light Dependent Resistors are very useful
  especially in light/dark sensor circuits

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Light Module

• Digital Control of Light with On/Off options

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Light On /OFF
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The Connected Circuit
Light Dependent Resistor
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Light Module
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Door Module
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Door On /OFF
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Curtain Module
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Website
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Conclusion

• The objectives of project have been fulfilled
  successfully
• Home automation system can provide the needed
  security, energy conservation, and many other
  useful features
• Project would not be accomplished without the
  cooperation of the team members.
• It encourages the engineering ethics and prepares
  the students for real life situation.

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Thanks For listening