anybody pls help me in doing automatic headlight dimmer using microcontroller.I am having the circuit without microcontroller.It is having many limitations so kindly somebody forward me the circuit using microcontroller..

 

You do not say anything about the circuit you have rejected, or why it was unsatisfactory.

Have you done any research? - http://en.wikipedia.org/wiki/Automatic_headlight_dimmer

 

yes it was unsatisfied,bcoz it got dim due to streetlights..

 

That says nothing about the circuit or the sensor.

You may notice from the Wikipedia article that modern technology is going away from the LDR's to cameras, which allow a processor to tell is the light source is on a level with the car, or off to the side or above it.