Outcome

• simple 2-inputs (sensors or inputs) 1-output (LED) device - representing automatic lights on/off (and dimming) system based on the natural light intensity in a room
  
• Inputs: Photosensor (photo-resistor), Toggle Switch
  
• Output: Led
• Overall idea: to implement an automatic light on/off system using natural light intensity. Here the photosensor will sense the intensity of natural light in the room. As the intensity of natural light changes, the LED output intensity will change. The master toggle switch will provide overall control of the system. It provides an option to keep the system automatic or manual. When the toggle switch is ON, then only, output LED can be controlled using this system.