LED is the most popular source of light which is widely employed in our homes as well as it is used in electrical projects. In the start of the electrical age, simple bulbs were used to obtain the light. Let’s understand the working of simple bulb:
A light bulb contains a filament (simply a type of wire). A voltage source connects to the wire and produces an electric current which raises the temperature of the filament and generates heat from it. While this setting is easy to design, 95% of the energy is wasted in generating the heat.
Light emitting diodes (LED) are, on the other hand, efficient devices which contain two semiconductors. Many LEDs have a long life up to 10 years. Here are three basic concepts you should know about LED.
List of Contents
The concept of polarity
- Red led has 2.0 V
- Green has 2.2
- Blue has 3.4
- White has 3.2
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