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Tuesday, July 11, 2017

What Is "Graphene" and its advantages

scientists are always trying to render infinitesimal energy from a material that common man can never comprehend of. But it's always a good thing, to know what exactly is going on in our little world of pure wonder. So I'm going to give you some information on something that just might change our world right before our eyes. "Graphene". In simple words Graphene is a 'single layer of carbon sheets; Just imagine the graphite in your pencils.. the smallest and the singular layer of graphite is "Graphene". It's a sheet of pure carbon that is one atom thick. It is amazing how such a simple substance actually holds such impressive properties:

• First created 2D material

• One of the strongest materials

• Lightest and thinnest material possible

• Very flexible and transparent

• Excellent electrical and heat conductor

• Graphene can enhance the current carrying properties of devices

• It can be stretched to about 20% without being damaged

• Graphene can be used to manufacture nanoscale templates based on its geometry

Electrical Properties Of Graphene: 
The flat hexagonal structure of Graphene offers relatively less resistance to electrons, which zip through it quickly and easily. It can carry electricity better than conductors such as copper and as well as Superconductors.

 Applications Of Graphene: 
• Batteries: Taking advantage of its conductivity and light weight Graphene can be incorporated in lithium-ion batteries to store 10 times as much power and charge 10 times faster and last longer as well. The batteries can also be made smaller. 

• Cell Phones: Touch Screens made with Graphene would be light and flexible, cell phones as thin as a piece of paper and foldable enough to slip into a pocket can be made. • Green Energy: Imperfect Graphene Allows positively charged hydrogen atoms or protons to pass through it, despite being completely impermeable to all other gases. 

• Bulletproof Armor: Graphene can also be used to build bulletproof vests. Sheets of Graphene absorb twice as much impact as Kevlar, it is super lightweight and much easier to wear as well. 

• Drinkable Oceans: Graphene could help to solve the world water crises. Membranes made from Graphene could be made that are big enough to let water through, yet small enough to filter out all the salts and impurities. 
• Solar Cells: When Graphene-coated Solar Cells are subjected to simulated raindrops, electricity is created. The salts contained within raindrops tend to dissociate into their component ions. And the positively charged ones are eager to interact with the negative ions in Graphene. This creates a potential between the two layers which renders electricity.

What Happens Inside A Solar Panel

Solar Panels are a common technology today, I'm pretty sure even a minor can build a solar panel. All you need is the right equipment the proper circuit and of course, the Web has it all. But How exactly do our solar panels extract energy as Solar energy and make it consumable electricity (safe power for our homes)?

In this article, I am going to verify the simple yet basic working principle of the Solar Panel. We are familiar with the term 'Photovoltaic Modules' which are basic components on which generation of energy from the solar system depends. The structure of a Photovoltaic module comprises an array of solar cells, which are made up Semiconductor materials. These are embedded in a parallel or series manner on plastic films and a front glass is used to protect the interior. The most common material used for the 'Photovoltaic effect' is silicon crystals which are arranged in layers of n-type and p-type departments. When light falls on these modules electrons are knocked out from the atoms of the semiconductor material, this forms the electronic current. In order to achieve this phenomenon, an electric field has to be established via electrical conductors. These solar modules are connected together in an assembly and produce DC electricity. The current produced is directly proportional to the area of the module and the amount of light falling on the modules. The electricity produced from a solar panel is in the form of DC (direct current) and can be stored in a battery. For panels installed at homes, an 'Inverter' is used for the conversion of DC to AC (alternating current) which is commonly used in residential areas.

Why LED Bulbs Are Preferable as compare to incandescent bulbs

Today, the use of the traditional bulbs is going to end. Nowadays people prefer LED bulbs due to the following reasons: 
Traditional incandescent bulbs only convert around 10% of their energy output into light wasting the other 90% as heat. LED bulbs lose very little energy in heat output and are approximately 400% more energy efficient. 

Image result for led light bulbbulbs have much brighter light. LED bulbs can offer better intensity than traditional bulbs and can be programmed to produce millions of colors as well as white light. 

 light bulbs can last anywhere from 20,000 hours to 50,000 hours or up to five times longer than any comparable bulb in the market. 

 bulbs are available in the market in different colors and also in different design which gained the attention of the people and people buy it especially in occasions to decorate the places. So due to its durability and efficiency LED is not restricted to only indoor purposes, it is also used for outdoor purposes such as lighting the park, garage, seminar halls and many other places.

What Exactly Is The Mechanism Behind Satellite TV

Every day we blindly use modern technology in alignment to our needs.. a toaster, radio, camera, doorbell even our TV's without a clear idea of the electrical hardships that made "Today"... So I decided to write an article on one of the most common mechanism "Satellite TV's". I am going to verify a clear cut but simple satellite phenomenon of direct broadcasting. 
Of course, a Satellite TV works by receiving the video and audio signals broadcasted from geostationary satellites orbiting the earth. But it's not that easy.. there are 5 major compartments which complete the mechanism. 

1) Programming Sources: By Programming Sources I mean the TV networks on which you watch all your programs, these include networks such as HBO, ABC or CNN. These networks are paid by the satellite TV providers and this is the same case with the popular Cable TV as well. The providers do not directly broadcast the programs but pay various television services to do that job. 

2) Broadcast Centers: The Broadcasting centers play the major role in transmission. These centers receive video and audio signals from a number of programming sources and emit these signals to satellites. 

3) Satellites: The Geostationary Satellites 22,300 miles above the equator receive the signals from the various satellite TV centers and rebroadcasts them back to earth. 

4) Viewers Dish: The purpose of the Dish is to receive all the signals coming from one or more satellites. There is a curve in the dish which serves the purpose of converting all the signals and focusing them to the feedhorn at the front of the dish. The feed-horn transmits the signals to the LNB (low noise block) converter through which the signal is amplified and passed to the IFL cable to the receiver. 

5) Receiver: The receiver decodes the signals to video and sound to be viewed on out TV sets also allowing you to change the channels. The two major Satellite TV providers are DirectTV and the Dish Network.

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