Attention Makers

CATEGORY: HARDWARE

Solar Powered Traffic Density Controlled Street Light

MAKERS: Priyank

The project is designed for LED based street lights with auto intensity control using solar power from photovoltaic cells. As awareness for solar energy is increasing, more and more individuals and institutions are opting for solar energy. Photovoltaic panels are used for charging batteries by converting the sunlight into electricity. A charge controller circuit is used to control the charging. Intensity of street lights is required to be kept high during the peak hours. As the traffic on the roads tends to decrease slowly in late nights, the intensity can be reduced progressively till morning to save energy. Thus, the street lights switch ON at the dusk and then switch OFF at the dawn automatically. The process repeats every day. High Intensity Discharge lamps (HID) used for urban street light are based on principle of gas discharge, thus the intensity is not controllable by any voltage reduction method as the discharge path is broken. LED lights are the future of lighting, because of their low energy consumption and long life they are fast replacing conventional lights world over. White Light Emitting Diode (LED) can replace the HID lamps where intensity control is possible by pulse width modulation. The intensity control helps in saving energy during late nights while traffic density on the streets is low. A programmable microcontroller of ATMEGA328 family is engaged to provide different intensities by calculating the traffic density at the different times of night using Ultrasonic Sensors, for energy saving for solar based system, using a charge controller for battery charging, overload and deep discharge protection. The system will be interfaced with an LDR to switch on and off the lights precisely to avoid power wastage. Furthermore, the project may be enhanced by using camera to monitor the traffic to change the intensity of the light with respect to it. The camera will also add a security feature to the system. Applications: 1. Primary application is in use of Street Light to save energy. 2. It can be used as lights in public parks, heritages and other public places so as to make their appearance energy efficient. 3. Less prone to accidents caused by both natural (e.g. Cyclones) and manmade causes (e.g. short circuit). 4. Automatic lights for domestic purposes. 5. Help in monitoring the traffic for security 6. Pollution free. 7. Hassle free installation 8. Can also be used for cost effective lighting on highways. Team Members: Suhrid Srivastava Priyank Lalpuria Dixit Goyal Umang Andrew Francis

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