The Microduino Sensor Light-D1 is a photodetector module made for the mCookie stacking system. It measures the amount of illumination around it and passes the reading to your project, letting you build creations that react to day and night conditions.
Snap it together with mCookie cores and other modules to make gadgets such as automatic lamps, brightness alarms, or smart home experiments. Programmable through the Arduino IDE, it is a great pick for STEM learning, hobbyists, and makers of all ages.