PROJECT BACKGROUND PROJECT OBJECTIVES PROBLEM STATEMENTS SCOPES OF WORK Introduction

P T R T R O U T N

1.1 PROJECT BACKGROUND

t r tur r rr t s t r tur s t r t rt t r tur w t t w r ust t r tur s t t t y r t w t t r °C 71.6 °F to 28°C 82.4 °F, though climate may acclimatize people to higher or lower temperatures. For human comfort, desirable room temperature greatly depends on individual needs and various other factors. Because of changing effect of temperature, an automatic control room temperature is needed to solve the problem of uncomfortable for human life.

1.2 PROJECT OBJECTIVES

Due to the problem statement, it s cleared that the objectives of the project is: 1. To design an accurate and sensitive circuit to control the room s temperature according to any changes of temperature. The suitable reference temperature is in the range of 22°C to 28°C. 2. To simulate the simplest temperature controller circuit with specific software.

1.3 PROBLEM STATEMENTS

t r tur w ys + , s +- . t s t urs - 0 st y 1 20 x 3 r + y - y t t +, 456 7 8 . 9 8 + 2 t : + ; r + + 4 w : + t t 8 + 2 6 +- y 9 8 + - - + 4 r r + y 8 . : 8 4 + rt + t t r r . 8 + x t - tt r ur 6 = t s r . + 9 ut t + 4 r syst s +- - 6 + 4 r t t t r 8 t 2 ut t + 4 r r t r tur ; 8 . y s ss st : +- ss . + . t ; 6 7 8 . t sur + 4 t r tur 2 t r 8 t s . + 4 ur t 6

1.4 SCOPES OF WORK

7 s ? t w 2 us + + 4 r +, t r tur + , + , + . - r +- . - + , +, 2 t 2 + 6 7 r t ur . + . 0 +- r + 4 r r r t + ++ 4 s t x ut t t . 6 7 8 . 9 t 2 8 + t + +- r t + 2 t r tur . + . 0 1 ty 3 A BCDE F 5 +- r + 4 r r G H I JK = LMK w : st 8 - y t . t s ? t 6 = 8 +- t + . 2 t r tur - . + t + 4 + t s ? t 6 . , + 2 r t + 8 4 1 t r tur . + . r 5 w : . + 4 t r + 4 r r +- r + 4 r r w : . + 4 : t t + . , + t + r s - r . t 2 + s speed according to the temperature. In order to relate the hardware temperature sensor and microcontroller with the software, the understanding of source code that will be create using C compiler like MikroC or MPLAB IDEPICC- Lite is also important. The function of the compiler is to translate C language commands to HEX machine code. N CHAPTER II LITERATURE REVIEW

2.1 Introduction

O P t Q r R tur Q S Q T P Q w P s P UVWX t RYZ P Y Q R [\ VXW]Q[ t R s R R _ Q ` WX a R t \Q r P Ya P Y `WX UR t P W Y Y Q[Q ss R ry t W [W U V b Q t Q t \Q VXW] Q[ t c d b b P Y `WX UR t P W Y P s aR t \Q r Q e ` r W U TR r P Wf_ _ WfX[Q s su [ \ R _ g h ic Journal 2. Books 3. Conference Transcript 4. Thesis 5. Patent 6. Website After searching through all this various material, all information will be filtered to be related to automatic controlled room temperature. The information that will be focused on this chapter is about some reference circuit of automatic controlled room temperature and its main components that to be used. j

2.2 Reference Circuit 1