Basic 5mm LED with a blue lens offers high intensity light for indication purpose. It has a typical forward voltage of 2.0V and a rated forward current of 20mA. Light Emitting Diodes (LED) are the Blinky things in circuit. It is used as a power indicator in project or as warning indicator or a status indicator. We mainly use LED’s for things like Power indication, relay status, to check if RF data has been received or not, warning status etc. This LED is still used widely in electronic circuits, remote controls, for automation systems, industries and consumer electronic products as transmitting elements and indicators.