Efficient power saver for street lights using LDR, RTC, LEDs light with solar power-live

Efficient power saver for street lights using LDR, RTC, LEDs light with solar power

In this huge population world power is becoming as essential as human life. So we cannot stop using power but we do not have sufficient power sources to be used. So we have to reduce the wastage of power usage. In this project we consider present street lights controlling system because most of the power is wasted in this present process. This project aims at saving the electrical power upto maximum extent using sensors and real time clock. In this competitive world, human cannot spare his time to perform his daily activities manually without any fail. The most important thing he forgets is to switch off the room lights wherever not required. With this, even the power will be wasted up to some extent. This can be seen more effectively in the case of street lights and commercial sign boards. This project gives the best solution for electrical power wastage. Also the manual operation is completely eliminated. This project provides different on and off timings to operate the lights. The user can once program these timings according to his requirements and these timings will be stored in RTC itself and cannot be erased unless the user wishes to change it again.                      

There are systems already available in the market with an intention to save the energy in the case of street lights. But these systems may be equipped with LDR or RTC to operate the street lights. If the project is implemented using LDR, the street lights will be switched on even during the midnights (at the time when the traffic on the roads is almost nil) and thus the energy is wasted by maintaining the lights ON even when not required. If the project uses RTC as the key component to operate the lights, the seasonal variations cannot be taken into account and the task of operating the lights at exactly required timings is not achieved completely. Keeping these technical issues in mind, this project has been designed to overcome the limitations of the older systems and save the energy upto the maximum extent.

This system switches on the lights only at preprogrammed timings. As the DS1307 Real Time Clock chip with battery back-up is used, there will be no disturbances for the programmed on/off timings even in power failures. The project also works perfectly according to the seasonal weather conditions.

The project uses LDR to read the intensity of the sunlight. The microcontroller takes the decision according to the sensor output. Thus, the microcontroller operated the lights by considering both RTC and LDR output.


Software Tools:

  1. Keil compiler
  2. Orcad.
  3. Proload 

Hardware Tools:

  1. AT89C52
  2. LCD
  3. ADC 0808
  4. LDR
  5. RTC