2. Guided by:- D.J.M.

4.  Patel Tirth A. (106500309052)  Raval Jayesh A. (106500309037)  Rami Jay R. (106500309061)  Sutariya Jitendra A. (106500309054)  Sathwara Hardik S. (106500309083)

5.  This project will present the design, construction, development, control and evaluation of an automatic switching electric fan and also control the intensity of light.  The microcontroller based automatic fan system and light systems presented in this project are required to fulfill the requirement of technologies “tomorrow will be more advanced than today”.  The electric fan automatically switches according to the room temperature changes and lights are switch on one by one according to the room intensity changes.  This electric systems are contains combination of sensor, LDR, microcontroller and relay with integration of embedded controlled programming.

8. A. Microcontroller B. LED (Light Emitting Diode) C. LDR (Light Depended Register) D. Temperature Sensor E. LCD (Liquid Crystal Display) F. Relay G. Darlington Transistor Array (ULN 2003)

9. 1. Microcontroller as the main controller. 2. The temperature sensor as the input for the microcontroller. 3. Relay as the output of microcontroller. 4. LDR as the input for the microcontroller. 5. LCD as the preview the status of input.

10. Sometimes electric fan and light is wasting power because of human attitude. Human also mostly demands something that easily to be used without wasting energy. To minimize or to reduce the power usage, this project developed an automatic fan system where fan is controlled by the room temperature and light system where lights are controlled by room light intensity.

11.  Circuit is simpler in design.  Power saving.  Temperature variations can be easily tracked down.  Less maintenance.  Easily repairable.  Low installation cost.