Light Emitting Diode

Light Emitting Diodes (LED) come in different colours, shapes, sizes and brightness. The more common colours being red, green and yellow.

They are also available in bi-colour and tri-colour versions. Round ones come in 3, 5 and 8mm sizes.

There are also rectangular, square and bar types.

Flashing types are available and seven segment displays are made of a number of LEDs in a particular pattern.