04-04-2010, 12:05 AM
By default a Solar Panel moves from east to west from morning to evening. The problem arises when there is a cloud over the panel interrupting the light. The current system continuously monitors the position of the cloud using Light Dependent Resistor. An interrupt is sent to the micro controller from the device as soon as the cloud covers the panel. The panel then starts rotating in the east and west direction in search of light. Once the light is detected the panel stops at that position and continues its normal operation. The input is fed as 8 bit digital data to the micro controller board, through serial interface. The controller board then performs a closed loop control, calculates the number of steps and gives as input to the stepper motor. The stepper motor moves the solar panel accordingly to receive the light