1. Student Name USN NO Guide Name H.O.D Name Name Of The College & Dept

2.  CONTENTS 1.Abstract 2.Objectives 3.Block diagram 4.Methodology 5.Advantages & disadvantages 6.Applications 7.Conclusion

3. 1. ABSTRACT Temperature based fan speed control system is designed for energy efficiency. It includes high efficiency fixtures, room temperature based automatic controls that make adjustments based on conditions such as occupancy. This system is connected to ARM LPC2148. Present paper deals with design and development of a Temperature based fan speed control system which is controlled by ARM LPC2148 microcontroller and power line communication.

4. 2. OBJECTIVES The objective of this paper is to survey WSN for the home/office automation and presents the different technologies used, topology used, user interfacing techniques etc

5. 3. BLOCK DIAGRAM

6. 4. METHODOLOGY: The output of Temperature sensor is connected to Comparator which receives the commands from the Temperature sensor. The output of the Temperature varies according to Temperature from the environment. Depending on the Temperature from the environment the speed of the fan is controlled with 3 speeds high, medium and low with the help of ARM controller.

7. 5. ADVANTAGES & DISADVANTAGES:  ADVANTAGES: 1. Unnecessary wastage of electricity can be controlled to a greater extend. 2. Maximum power can be saved. 3. Selectable Sensitivity, Sensitivity can be adjusted to match installation requirements. 4. Wide supply voltage range: 3.0V to 15V in COMPARATOR.  DISADVANTAGES: 1.High capital expenditure required to invest in automation (an automated system can cost millions of dollars to design, fabricate, and install). 2.A higher level of maintenance needed than with a manually operated machine, and a generally lower degree of flexibility in terms of the possible products as compared with a manual system.

8. 6.APPLICATIONS: 1. Temperature based fan speed control is useful for the processor in the laptop and personal computers efficiently 2. Counter dependent automatic switching system of room. 3. Speed control Without a Tachometer

9. 7. CONCLUSION: Thus we provide a smart energy saving system using ARM 7 microcontroller which helps to reduce energy usage and cost by eliminating over –speed and unnecessary waste. This system provides centralized control of all fan within a home or commercial building, allowing easy implementation of scheduling, occupancy control, fan speed and more through power line communication. This system also supports demand response and will automatically dim and take advantage of demand response incentives and cost savings.

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