The Arduino circuit above consists of following components: And LDR (Light Dependent Resistor) sensor which's resistance value changes with light intensity. A virtual Terminal to monitor the data acquired from serial port. A Led Write an Arduino code that turns the LED on if the light intensity is lower 100 and turns the LED off if it is higher than 100. Virtual terminal should show light intensity, read voltage value at AO and LED status continuously as shown below. IMPORTANT: Use the same circuit configuration (pin numbers, resistor values etc) for me to check your code in my Proteus project. Otherwise, your work will not be evaluated. . If the value you read from the LDR is 823 and above, the LED will turn off, if it is below the LED will turn on