Basic Electronic Components | Light Emitting Diode (LED)
A Light Emitting Diode (LED) is a small component that lights up
when current flows through it.
|Light Emitting Diode (LED)|
|LED Circuit Symbol|
Sometimes we use LED for simple tasks like indicating that your circuit has power,
that the circuit is working or that circuit has failed.
You can also combine several LED’s to create simple 7 segment displays that
can display number or use them to make cool light decorations. If you combine
enough LED’s in square, you can use them to show images.
LED’s exist in many different colors; Green, Blue, Red, White, Yellow and many more.
There are also special types of LED’s called RGB. These are LED’s where a red, green and
blue LED has been combined to one package. The colors mix so by controlling
the intensity of each of the three colors we can create a wide spectrum of different colors.
If you want to use an LED, You need to connect LED in a circuit with a resistor, as shown in Below image
|A simple LED circuit|
What is the reason to use the resistor? The reason you need to use the resistor is to make sure the LED does not burn. A common LED can handle a very low current. If you don’t use a resistor to control the flow of current, your LED will be die quickly and it will become unusable.
But what is a resistor?
Read this to know all about resistor