Tampilkan postingan dengan label consumer electronics. Tampilkan semua postingan
Tampilkan postingan dengan label consumer electronics. Tampilkan semua postingan
Senin, 27 Februari 2012
Consumer Electronics Items
Introduction:
The daily use of electronic equipments are known as consumer electronics and includes TV, telephone, DVD, CD, PC, laptop etc. These equipments are manufactured throughout the world. With the advancement in electronic engineering at a continuous pace, a number of new variety electronics items flood into the market every year and the cost the existing products reduces continuously and it is one of the biggest advantage of consumer electronics industry.
Electronic waste is one of the problems associated with these electronic item and many manufacturers are now planning to deal with these waste.
Semiconductor:
All electronic devices use semiconductors and without these semiconductors none of the electronic device is complete. Semiconductor behaves like an insulator at absolute zero (-273 degree centigrade) and can be distinguished from conductor that at this temperature the outermost filled electron energy band is completely filled in a semiconductor compare to the conductor in which the band is partially filled.
At room temperature semiconductor show a very small electrical conductivity much lower than that of conductor.
Doping in semiconductor:
Most common semiconductors used for electronic devices are silicon and germanium. Although some other conductors such as iridium phosphide, gallium arsenide and mercury cadmium telluride are also used.
A pure semiconductor also known as intrinsic semiconductor, when doped with electron rich element e.g. arsenic or electron deficient element e.g. boron in very small quantity, its conductivity increases and the resultant conductor is known as extrinsic conductor. My doping arsenic (electron rich) and boron (electron deficient) in silicon, we get n-type (negative type) and p-type (positive type) semiconductor devices.
We may create a p-n junction by doping different element in different region of semiconductor and the device is known as diode. Similarly we can create p-n-p or n-p-n junctions and the device is known as triodes.
Electronic Devices
(a) Television:
It is a device by which we can receive moving pictures and sounds over a distance. The whole transmission and receiver systems require the following inputs.
1.Camera for live images or flying spot scanner for transmission of films and sound source.
2.Transmitters for transmitting both images and sounds.
3.Receiver systems for receiving these signals.
4.Display device, which is either CRT, Rear projection, LCD or plasma. To display the signal in the forms of images and sounds.
(b) Telephone:
It is the device for communicating by which two persons can send and receive sound signals over a distance. The system requires the following inputs.
1.The telephone equipment, which converts sound signals to electrical signals and electrical signals to sound signals.
2.Central exchange from where the subscribers are interconnected.
3.Wiring for connecting all the subscribers.
(c) Calculators:
It is a device used for carry out various mathematical calculations. The input required for calculator are as given below.
1.Power source (battery or solar panel).
2.Display device (LED or LCD)
3.Keypad containing all functions and numbers.
4.All electronic circuit devices.
Electronic Waste:
These are the waste electronic devices and if properly utilized may be valuable secondary raw material source for various electronic equipments and if thrown out may act as toxic due to presence of various toxic materials including lead, mercury, cadmium, arsenic etc. uncontrolled burning of these materials may also cause environmental problems.
Electronic waste is sometimes illegally sent to other countries for processing. However, due to complexity and difficulties in recycling, e-waste will remain an issue for the coming days.
Kamis, 22 Desember 2011
Affordable Consumer Electronics and Goods for the Small Business
As a small business owner, you probably know what a hassle it can be to shop for electronics and other business goods. You need products that are dependable, affordable, and easy to use. Computers, office equipment, mo bile phones, and many other business necessities are available both online and off-line, so you have many options to consider.
Tips for In-Store Buying
When shopping for electronics or computers at a local store, compare brand names, features and pricing carefully. Sometimes a low price means sacrificing the quality or features you really need. For instance, if you're planning to buy a computer desk, consider the design of the desk and all its features. Does it have drawers or shelves to make organization easy? Does it have a pullout keyboard or a desktop keyboard? Also, consider the size of the desk and the quality of its materials (steel, solid wood or particle board).
When buying a computer, consider brand name, size of the hard drive and memory, as well as any pre-installed software it may contain. Avoid buying computers that have "advertising" menu bars pre-installed on the Windows screen. These tend to hang up often and are not worth the hassle although they are usually lower in price. Look for reputable brand names such as Dell, Pentium, Acer, and Compaq. Dependable laptops are available from these companies: Dell, Averatec, Compaq, HP Pavillion, Acer, Gateway, and IBM.
Avoid rebate offers. Rebates are often more trouble than they're worth, and your name might get added to hundreds of mailing lists! Instead, shop around for a great value up front to get the PC or laptop that will meet your needs.
Refurbished Products
With refurbished electronics or computers, find a reputable company that has a good standing with the Better Business Bureau. Some companies will advertise refurbished items, but will not follow through with a guarantee. Before buying a refurbished item, check for a guarantee and do a little research on the company to find out if other customers were satisfied with the products and service. If buying refurbished computers online, use the search engines to find out as much information as you can about the company.
Buying Electronics and Computers Online
Shop around online for great bargains on brand name electronics and computers. If you're pressed for time, there are discount home electronics online superstores that carry almost everything you'll need for your small business. Some of the products you might find include cables, office equipment, TV and video accessories, scanners, GPS, power protection products, mobile phones, digital recorders, formatted diskettes, CDs, and more.
Online electronics stores for small business can offer you better prices because they have few overhead costs when operating on the Web. You can usually expect to save up to 20% on items.
You'll find shopping online to be a great time-saver because you can shop from your home or office without visiting busy stores.
Use these tips to find electronics, computers and other products for your small business at great prices without sacrificing quality.
Tips for In-Store Buying
When shopping for electronics or computers at a local store, compare brand names, features and pricing carefully. Sometimes a low price means sacrificing the quality or features you really need. For instance, if you're planning to buy a computer desk, consider the design of the desk and all its features. Does it have drawers or shelves to make organization easy? Does it have a pullout keyboard or a desktop keyboard? Also, consider the size of the desk and the quality of its materials (steel, solid wood or particle board).
When buying a computer, consider brand name, size of the hard drive and memory, as well as any pre-installed software it may contain. Avoid buying computers that have "advertising" menu bars pre-installed on the Windows screen. These tend to hang up often and are not worth the hassle although they are usually lower in price. Look for reputable brand names such as Dell, Pentium, Acer, and Compaq. Dependable laptops are available from these companies: Dell, Averatec, Compaq, HP Pavillion, Acer, Gateway, and IBM.
Avoid rebate offers. Rebates are often more trouble than they're worth, and your name might get added to hundreds of mailing lists! Instead, shop around for a great value up front to get the PC or laptop that will meet your needs.
Refurbished Products
With refurbished electronics or computers, find a reputable company that has a good standing with the Better Business Bureau. Some companies will advertise refurbished items, but will not follow through with a guarantee. Before buying a refurbished item, check for a guarantee and do a little research on the company to find out if other customers were satisfied with the products and service. If buying refurbished computers online, use the search engines to find out as much information as you can about the company.
Buying Electronics and Computers Online
Shop around online for great bargains on brand name electronics and computers. If you're pressed for time, there are discount home electronics online superstores that carry almost everything you'll need for your small business. Some of the products you might find include cables, office equipment, TV and video accessories, scanners, GPS, power protection products, mobile phones, digital recorders, formatted diskettes, CDs, and more.
Online electronics stores for small business can offer you better prices because they have few overhead costs when operating on the Web. You can usually expect to save up to 20% on items.
You'll find shopping online to be a great time-saver because you can shop from your home or office without visiting busy stores.
Use these tips to find electronics, computers and other products for your small business at great prices without sacrificing quality.
Kamis, 15 Desember 2011
Apple I-Pods, Why Are They So Popular?
These days while your just walking around school, work, the mall, or just about anywhere you’ll see many people listening to their Apple I-Pods. You might see some with cool accessories such as portable speakers, cool looking cases, voice recorders, FM transmitters, remotes and much more. Lets face it the Apple I-Pod has become the most popular mp3 player around and it doesn’t seem like it will loose that #1 spot anytime soon with all their new little inventions. So what makes the Apple I-Pod so popular?
Some may say the design is what makes it popular and makes them purchase an I-Pod and some may say the fun accessories that come with it. Also a few people may have bought it just because everyone has one and they just want to fit in. They’re many reasons why people buy I-Pods; you will just have to find yours.
Apple I-Pods started out just playing songs. Then moved on to having photos, then pod casts and now it even plays videos! I-Pod MP3 players do just about everything and more. Not only are they good for many things, they are now also very thin and light. They can fit in your pocket without you even feeling it in there and still have room for just about everything else. With your Apple I-Pod you can watch video pod casts, music videos and your favorite TV shows. You can browse your old memories with the photo slideshows, complete with music. If you love reading you may also read books with audio books it has. But of course most of you already know how good of an mp3 player I-Pod’s are and probably already have one. In this case you must get some cool accessories for your Apple I-Pod.
Accessories for your I-Pod can be a great extra feature to everything the great MP3 player has to offer. Impress your friends with the new portable speakers you get for your I-Pod. With portable speakers you can leave your Apple I-Pod in your pocket while you’re taking a walk and have the speakers amplify all your songs for you. If you are not near your I-Pod while it’s playing with the speakers you may also use a remote to change a song or pick another song with simply a click of a button. You may also want to buy a voice recorder for your MP3 player to record memorable moments. If you are a musician you may also use the voice recorder to record songs you play or sing. If you jog daily for a good exercise and would like to listen to your I-Pod you can also get a sports sleeve for it. Apple I-Pods have just about every accessory it needs out there and now it’s your job to find some and for great prices. If you are interested in buying some accessories for your I-Pod you should first try browsing around http://www.SplayTech.com
Some may say the design is what makes it popular and makes them purchase an I-Pod and some may say the fun accessories that come with it. Also a few people may have bought it just because everyone has one and they just want to fit in. They’re many reasons why people buy I-Pods; you will just have to find yours.
Apple I-Pods started out just playing songs. Then moved on to having photos, then pod casts and now it even plays videos! I-Pod MP3 players do just about everything and more. Not only are they good for many things, they are now also very thin and light. They can fit in your pocket without you even feeling it in there and still have room for just about everything else. With your Apple I-Pod you can watch video pod casts, music videos and your favorite TV shows. You can browse your old memories with the photo slideshows, complete with music. If you love reading you may also read books with audio books it has. But of course most of you already know how good of an mp3 player I-Pod’s are and probably already have one. In this case you must get some cool accessories for your Apple I-Pod.
Accessories for your I-Pod can be a great extra feature to everything the great MP3 player has to offer. Impress your friends with the new portable speakers you get for your I-Pod. With portable speakers you can leave your Apple I-Pod in your pocket while you’re taking a walk and have the speakers amplify all your songs for you. If you are not near your I-Pod while it’s playing with the speakers you may also use a remote to change a song or pick another song with simply a click of a button. You may also want to buy a voice recorder for your MP3 player to record memorable moments. If you are a musician you may also use the voice recorder to record songs you play or sing. If you jog daily for a good exercise and would like to listen to your I-Pod you can also get a sports sleeve for it. Apple I-Pods have just about every accessory it needs out there and now it’s your job to find some and for great prices. If you are interested in buying some accessories for your I-Pod you should first try browsing around http://www.SplayTech.com
Rabu, 22 Juni 2011
How To Choose A Digital Camera
Digital cameras have exploded in popularity in recent years. The convenience that they have brought to the market with the ability to review your pictures instantly and correct any imperfections by retaking the picture and the ability to store, edit, and email them from your own personal computer has fueled this growth.
It is now no longer a matter of if you need a digital camera, but rather which one do I choose?
First decide how you are going to use the camera. If simplicity is your goal, a simple point and shoot digital camera will do. If you wan the flexibility to be able to grow with the camera as you gain experience get a point and shoot that offers manual controls, this way you will have the best of both worlds – infinite options for creativity and the ease of an automatic mode.
The next item on your agenda should be megapixels. To keep it simple, the more megapixels the better the picture will be. So, how many megapixels do you need?
If all you are doing is printing or emailing photos, a 3 or 4 megapixel digital camera will work. If you are going to use it for more professional work and enlarging photos, go with one with 5 or 6 megapixels.
If you want uncompromising clarity go with a 7 megapixel or above. Just remember the higher the megapixels the higher the price!
How much zoom do you need? You have two types of zoom with digital cameras, digital and optical. Optical is the more important because it brings your object closer without losing quality. The digital zoom will bring the object in closer, but you sacrifice the quality of the picture. If all you do is take everyday pics a 1x to 4x optical zoom will do. If you take pics like sporting events, get one with a 5x optical zoom or higher. For really intense professional work choose a 10x or better optical zoom.
Digital cameras have evolved now to the point where you can get a great fully featured camera that will fit comfortably in your shirt pocket so don’t think you have to get a large one to get good quality. If you are using it for more professional use with large optical zoom and such expect to have to buy a larger one however.
It is now no longer a matter of if you need a digital camera, but rather which one do I choose?
First decide how you are going to use the camera. If simplicity is your goal, a simple point and shoot digital camera will do. If you wan the flexibility to be able to grow with the camera as you gain experience get a point and shoot that offers manual controls, this way you will have the best of both worlds – infinite options for creativity and the ease of an automatic mode.
The next item on your agenda should be megapixels. To keep it simple, the more megapixels the better the picture will be. So, how many megapixels do you need?
If all you are doing is printing or emailing photos, a 3 or 4 megapixel digital camera will work. If you are going to use it for more professional work and enlarging photos, go with one with 5 or 6 megapixels.
If you want uncompromising clarity go with a 7 megapixel or above. Just remember the higher the megapixels the higher the price!
How much zoom do you need? You have two types of zoom with digital cameras, digital and optical. Optical is the more important because it brings your object closer without losing quality. The digital zoom will bring the object in closer, but you sacrifice the quality of the picture. If all you do is take everyday pics a 1x to 4x optical zoom will do. If you take pics like sporting events, get one with a 5x optical zoom or higher. For really intense professional work choose a 10x or better optical zoom.
Digital cameras have evolved now to the point where you can get a great fully featured camera that will fit comfortably in your shirt pocket so don’t think you have to get a large one to get good quality. If you are using it for more professional use with large optical zoom and such expect to have to buy a larger one however.
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