Automation has created a bigger hype in the electronics. The major reason for this hype is automation provides greater advantages like accuracy, energy conversation, reliability and more over the automated systems do not require any human attention. Any one of the requirements stated above demands for the design of an automated device. The energy conversation is very important in the current scenario and should be done to a maximum extent where ever it is possible. Energy can be effectively

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... erved if we can control the traffic lights on the highways by glowing them only when there is traffic on the road, and this is all most impossible to detect the arrival of a vehicle manually without the presence of light. So in this situation we should think about a system which is capable of sensing the arrival of vehicle and ON the lights and turn OFF as soon as the vehicle leaves the area. Our high power LED based street light controlling system is the result of this idea. This was designed with a vehicle detecting sensor which is capable of sensing the arrival of a vehicle. It drives the same information to a micro controller. The micro controller is interfaced with the street lights and it is the responsibility of the controller to switch the status of the lights with respect to the acknowledgement received to it from the vehicle sensor. The major advantage of the device is it not only controls the status of the light but also controls the intensity of the light with respect to the intensity of the light received from the vehicle. .