LED (Light Emitting Diode): Explained.

 

Incandescent Bulbs: 

            A traditional incandescent bulb uses a thin delicate filament that, electricity is fed through to create light. As electricity is fed through this filament, it heats up in emits light. We've been doing it this way since 1897. But it's not very efficient as 90% of the energy put into the bulb is wasted as heat. That's why light bulbs get so hot. The successive heat and delicate design cause them to have a very short lifespan of around 1,000 hours.

LED (Light Emitting Diode):

            LED stands for the light-emitting diode. LEDs have been used for a long time in small electronic devices as indicator lights. But in the last couple of years, the technology has gotten better at making them a lot brighter while keeping them super energy efficient. This innovation has now made its way into light bulbs of all shapes and sizes. The LED is made of a positive lead, a negative lead, and a semiconductor dye. These components are housed in an epoxy shell. Electricity enters the LED through the positive lead and energizes the tiny semiconductor dye and light is created. Let's examine exactly what happens in that semiconductor die to create light. One side of the die has a positive charge and the other side is negatively charged. When electricity is applied to the die, the negatively charged particles are attracted to the positively charged particles and the byproduct is the creation of photons and photons are what light is made of. Keep in mind this was a very simplified description. Of course, all of this happens with very little energy needed, and almost no heat is created as compared to traditional incandescent light bulbs or even newer compact fluorescent bulbs. In fact, the traditional bulb as you will recall wastes 90% of the electricity fed to it as the LED only losses 10% to heat. So, 90% is actually converted to light. That is why LED bulbs can create as much light as a higher wattage. incandescent

            LEDs have a much longer lifespan, up to 40 times longer than a traditional bulb. LEDs are simple in design and incredibly efficient. And best of all, they last up to 40 times longer than incandescent bulbs.

 

 

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Diodes: Explained.

 

In this article, we will be covering that what is a diode and what do diodes do. 

Diode:

            A diode is a device or component that allows current to flow in only one direction. LED is a type of diode. It's a diode that emits light but the diode we're concerned about is not a light-emitting diode.

                                     

If you have the diode connected so that it allows current to flow through the circuit, if you now stop the circuit and disconnect this diode, turn it around to swap the polarity of it and then reconnect it to the circuit. If you go ahead now and power up the circuit, nothing happens. No current is being allowed to flow through the circuit. This diode is stopping the current from flowing because it is now what you call reverse biased diodes. These are made up of semiconductor material and that means that they have the ability to both conduct and oppose the flow of current.

I am going to keep this simple so I'm not going to go into all the technical ways that diodes work for article as it can clear the basic concept of a beginner. All you need to know is that this diode will just block current flowing from one direction but it will allow it from the other direction so if you now go ahead and disconnect this diode, again flip it, either way, reconnect it and then power the circuit, it allows current to flow and there are many uses for diodes.