Presentation of automatic street light
- 1. SEMINAR REPORT OF AUTOMATIC STREET LIGHT PRESENTED BY ASHIM KUMAR MANDAL
- 2. CONTENTS INTRODUCTION HOW IT WORKS MAIN COMPONENTS ABOUT THE COMPONENT CIRCUIT OF AUTOMATIC STREET LIGHT ADVANTAGES DISADVANTAGES APPLICATION CONCLUSION REFERENCE
- 3. INTRODUCTION Reducing the wastage of power LDR is very useful in light/dark sensor circuit normally the resistance of an LDR is very high something as high as 100000 ohms.
- 4. HOW IT WORKS Light falls on LDR, it shows its minimum resistance voltage drops across LDR less than voltage of transistor, so no current will go from the collector to the emitter and transistor remains off. It automatically switches ON lights when the sunlight goes below the visible region of our eyes. (in evening after Sunset)
- 5. MAIN COMPONENTS TRANSISTOR BC547 LDR (LIGHT DEPENDENCE RESISTOR) RESISTOR LED BATTERY PCB BOARD
- 6. THE COMPONENTS TRANSISTOR BC547ABOUT Has an emitter terminal, a base terminal and a collector terminal current flowing from the base to the emitter controls the collector current
- 7. ABOUT THE COMPONENTS LDR (LIGHT DEPENDENCE RESISTOR) An electronic component whose resistance decreases with increasing incident light intensity Used in a potential divider setup with a second regular resistor RESISTOR The flow of current across the resistor device adjustable resistors are refers to as potentiometers
- 8. ABOUT THE COMPONENTS BATTERY A battery is a device that is able to store electrical energy in the PCB BOARD(PRINTED CIRCUIT BOARD) Mechanically supports and electrically electronic connects components using conductive tracks
- 9. CIRCUIT OF AUTOMATIC STREET LIGHT
- 10. ADVANTAGES Energy savings Low cost Safety and Security Automated operation
- 11. DISADVANTAGES It has a limitation of power Light turns on when shadow falls on LDR LED is a low voltage device
- 12. APPLICATION Used in street light applications Used in Domestic application
- 13. CONCLUSION In coming days, this will prove a great boon to the country, since it will save lot of electricity of power plant that gets wasted in illuminating the street lights. As a conclusion, around 77%-81% of power consumption can be reduced By using this system towards providing a solution for energy saving
- 14. REFERENCE Telecomunication by Viswanathan Thiagarajan Digital Signal Processing by Babu Ramesh P. Electromagnetic Field Theory by Raju