A light meter is a very useful device that finds applications in hospitals, schools, factories, parking lots, passageways, and many more to measure and maintain adequate lighting levels. It is also ...

LED (Light Emitting Diode) An LED is a semiconductor device that emits light when current flows through it. LEDs are commonly used in electronics to indicate status or provide visual feedback.

This project uses an Arduino micro-controller to time a gradual light-strip illumination to simulate a sunrise, and thus allow one to wake up gradually rather than suddenly by an alarm clock. I've ...