Some LED Basics


LEDWhat is an LED


LED means Light Emitting Diode

An LED is a semiconductor that emits light when electric current passes through it.

The emission of light depends on electrons flowing through the junction between P and N regions; when an electron from the N region passes the junction and recombines with a hole in the P region, its energy is radiated as a light pulse.



The color of that light depends on the used materials,
it can be red, amber, green or blue.