A general purpose Light Sensor for the camera trigger. It can be connected to the D/A Sensor input of the Camera Trigger. You can use this with a Laser Pointer and when something crosses the beam then you trigger your camera or you can use it to set the time of day you want to make a photo and based on the light from the sun start making pictures. The sensor is analog and can read the light intensity as a variable value, which means that based on how much light it receives it generates a different value.