A ragkaian electronics that will operate if exposed to light, by using AT89S51 microcontroller circuit is programmed and is designed in accordance with the light sensor that is provided, the sensor used in this circuit is the LDR. The workings of this robot is that if the LDR sensor is exposed to light then it will follow the direction of the light coming. The LDR used in the circuit of the robot which is made using 2 pieces of LDR which are respectively in place in front and in the back, gloves are off when the LDR is next exposed to light eating robot is going forward, vice versa. Propulsion of the robot itself uses a DC motor as the drive wheels on the Robot Light Detector.