I am doing my final year technical project on "HOME AUTOMATION USING COLOR SENSOR". After reading an article on color sensor, i thought why not to use this concept for home automation applications.I have completed the color sensor circuit but i am not getting any idea about how to interface it with ATMEL AT89S51.So i need your help to interface it with the micro-controller.I have attached aa abstract of it.Please help me as soon as possible.[attachment=17766]

just connect the outputs of the colour sensor to any port of the microcontroller and make that port as input port while writing the program.
then accordingly program your uc.