We all now a days came to hear about led bulb,tubes etc. LED is the short form of light emitting diode.It is a PN junction diode which works on forward bias. By changing the semiconductor material from which the LED is made, we can change the color of the light emitted.It uses less power than any other electric bulb.there are different types of leds that is unicolour multicolour,surface mount ,high power leds etc. the invention of led had made a drastic change in the filed of electronic. Today we can see these leds on each and every electronic gadgets, home appliances, vehicles etc.
Now we can take a look on LED voltage ranges and colours
LED symbol
simple LED circuit diagram
