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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7 Segment Display: Explained.

 

7 Segment Displays:

7-segment displays are a fun component to use in Arduino projects. You can use them to track time or keep score in a game. In this article, we'll discuss that how they work.

 

 

First, take a look at the seven segments. Each of these is labeled with a letter A to G. Each letter is then associated with a unique pin on the four-digit display. In addition, each of the four digits of the display has a pin associated with it. The remaining pin on the component is for the decimal point. To create the correct digit on the display, the correct pins must be turned on. For example, to create the number two in the second digit, we'd need to turn on pin D2 then we'd also need to turn on pins. A B D E and G technically the display is not capable of displaying more than one digit at a time however there are obviously times when we'd like to see more than one digit on the display to do this. We'll use the phenomenon of persistence of vision to trick our eyes and brains into seeing multiple digits. While the display will only show one digit at a time, we can insert a very short delay before the next digit appears. This will trick our eyes and brains into seeing the digits at the same time using delays as short as 5 milliseconds or 5 thousandths of a second will enable us to see 4 digits at a time.

Now that you know how the four-digit 7 segment displays works.

 

I hope that this article will help you.

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