A CD has a single spiral track of data, circling from the inside of the disc to the outside. The fact that the spiral track starts at the center means that the CD can be smaller than 4.8 inches (12 cm) if desired, and in fact there are now plastic baseball cards and business cards that you can put in a CD player. Lasers are used in CD players, dental drills, eye surgery, and even tattoo removal. But what exactly is a laser? There are numerous types, but all lasers work basically the same way. Learn how they generate such concentrated beams of light. One new baby at a time is a handful for most parents, so the thought of bringing home six infants -- when you already have twin toddlers -- is downright terrifying, from the cost of formula and diapers to the logistics of multiple 2 a.m. feedings. But even if you don't envy Jon and Kate Gosselin, the often-overwhelmed parents of this young octet, their unusual circumstances are undeniably ...
The fundamental job of the CD player is to focus the laser on the track of bumps. The laser beam passes through the polycarbonate layer, reflects off the aluminum layer and hits an opto-electronic device that detects changes in light. The bumps reflect light differently than the "lands" (the rest of the aluminum layer), and the opto-electronic ... You can put anything you want on a Web page, from family pictures to business information, to your random thoughts and musings. Learn how to create, upload and promote your pages so they're available all over the world. In February 2005, three PayPal employees launched the beta test version of a Web site called YouTube.They designed the site to let people share videos with the rest of the world. In November 2005, Sequoia Capital invested more than $3 million in the site, and a month later YouTube emerged as a full-fledged Web destination.
Electronics. Home Audio & Video. Audio. How CDs Work. by Marshall Brain. CD Player Components. Prev NEXT . Inside a CD player . The CD player has the job of finding and reading the data stored as bumps on the CD. Considering how small the bumps are, the CD player is an exceptionally precise piece of equipment. The drive consists of three fundamental components: A drive motor spins the disc ... In this article, we'll visit the field of electronic learning, find out how it works and what makes it effective both from the learner's perspective and the training producer's perspective. We'll also take a look at the reality of e-learning by examining the technology from a company called OutStart. Its Trainersoft software helps to create e ... After the deadline for entries, ballots with all of the qualified entries are mailed to academy members. Each peer group member votes in his own category -- performers for performers, directors for directors -- and everyone votes in the program categories, such as best comedy series and best miniseries.
CAT scans take X-ray imaging to a whole new level. Find out how a CAT scan machine uses 'slices' to form a 3-D computer model of a patient's insides. It's no wonder that more and more people are turning to electronic payment -- or e-payment-- as an alternative to sending checks through the mail. In this article, we'll look at the types of electronic payment, discuss its benefits and limitations and explain how to add e-payment capability to your Web site.
When we use the Internet, we're not always just clicking around and passively taking in information, such as reading news articles or blog posts -- a great deal of our time online involves sending others our own information.Ordering something over the Internet, whether it's a book, a CD or anything else from an online vendor, or signing up for an online account, requires entering in a good ... If you have ever compared an electric guitar to an acoustic guitar, you know that they have several important things in common. Both acoustic and electric guitars have six strings, they both tune those strings with tuning pegs and they both have frets on a long neck. Down at the body end is where the major differences are found.
Inside our RC truck, we have two electric motors, an antenna, a battery pack and a circuit board.. One motor turns the front wheel right or left, while the other motor turns the rear wheels to go forward or backward. For years, the trusty seat belt provided the sole form of passive restraint in our cars. There were debates about their safety, especially relating to children, but over time, much of the country adopted mandatory seat-belt laws.
The incredibly small dimensions of the bumps make the spiral track on a CD extremely long. If you could lift the data track off a CD and stretch it out into a straight line, it would be 0.5 microns wide and almost 3.5 miles (5 km) long! To read something this small you need an incredibly precise disc-reading mechanism. Let's take a look at that. HowStuffWorks explains thousands of topics, from engines to lock-picking to ESP, with video and illustrations so you can learn how everything works. Articles on HowStuffWorks that were written by Planet Green bloggers represent those bloggers' own opinions and viewpoints on subjects related to the environment and conservation. To provide feedback or corrections to these articles, please visit our Contact Us page and select "Planet Green feedback."
You've probably seen calculators with solar cells -- devices that never need batteries and in some cases, don't even have an off button. As long as there's enough light, they seem to work forever.You may also have seen larger solar panels, perhaps on emergency road signs, call boxes, buoys and even in parking lots to power the lights. Others have used old CDs to make disco balls, sun catchers, wreaths, mosaics, mobiles, party invitations and even bird treats -- just coat the disc with peanut butter or bacon grease, dip it in bird seed, attach it to a tree with yarn and watch the birds flock to your yard.
In response to this demand, electronics manufacturers introduced an alternative sort of CD that could be encoded in a few easy steps. CD-recordable discs, or CD-Rs, don't have any bumps or flat areas at all.Instead, they have a smooth reflective metal layer, which rests on top of a layer of photosensitive dye.. When the disc is blank, the dye is translucent: Light can shine through and reflect ... Medical professionals in the United States have invested in some of the most advanced diagnostic equipment in the world, but when it comes to keeping track of patients' medical histories, doctors and hospitals still rely primarily on pen and paper. Members of both political parties champion converting all of that paperwork into a comprehensive system of electronic medical records, and the ... Most people carry five to 10 keys with them whenever they go out. On your key ring you might have several keys for the house, one or two more for the car and a few for the office or a friend's house. Your key ring is a clear demonstration of just how ubiquitous lock technology is: You probably interact with locks dozens of times every week.
The list goes on and on... Even things like radar and microwave ovens depend on radio waves. Things like communication and navigation satellites would be impossible without radio waves, as would modern aviation -- an airplane depends on a dozen different radio systems. The current trend toward wireless Internet access uses radio as well, and that means a lot more convenience in the future! A sitcom typically lasts around 30 minutes. In the early days of television, the show's advertising came before the opening credits and at the end credits, using only about two and a half minutes of the show's 15 or 30 minutes. Frequent advertising breaks cut today's half hour programs down to 22 minutes. You're short on cash, so you walk over to the automated teller machine (ATM), insert your card into the card reader, respond to the prompts on the screen, and within a minute you walk away with your money and a receipt.These machines can now be found at most supermarkets, convenience stores and travel centers.
HowStuffWorks explains thousands of topics, ranging from the flu to black holes to conspiracy theories, with video and illustrations so you can learn how everything works. 5 Tips to Improve Your Wireless Connection. computer.howstuffworks.com/improving-wireless-connection.htm. Wireless connections are the norm, and there are easy ways ...
With the rise of the MP3 format, burning your own music CDs has never been so popular -- or so easy. CDs have become one of the most widely adopted data-storage mechanisms. Find out how CD burners work. There are good reasons the power grid distribution system works the way it does, though it can lead to some big problems. Learn how power grids work. It's a bit like money ... and it's a bit like a financial bubble. It's Bitcoin, and it may be giving us a glimpse of the future of money.. Bitcoin is a type of virtual currency brought to life by the internet, very powerful computers and the willingness of lot of people looking to embrace new forms of monetary exchange.
Before compact discs, you had to rewind and fast-forward to get to a particular bit of information. Not so with digital storage -- the CD makes pinpointing data a split-second task. Find out how CDs (and CD-ROMs, CD-Rs, CD-RWs) hold and let you retrieve information. Recycled CD Bowls - Recycled cd bowls can be a lot of fun to make. Visit HowStuffWorks to learn all about making recycled cd bowls. ©2008 HowStuffWorks Millions of people trade billions of shares of stock every day on a vast collection of computer systems that are incredibly reliable and, very nearly, error-free. There are so many things happening at once that system becomes difficult to comprehend, and the fact that the it works so well is truly a feat.
HowStuffWorks Electronics answers your home theater system questions and more. Find explanations, reviews, videos and prices on cameras & photography, personal audio, home audio & video systems, HDTVs and cell phones. Electric vehicles, especially EVs powered by fuel cells, are a compelling alternative to gasoline-powered cars. Find out how today's electric cars work to get you where you're going without gasoline. Complaints with Remastering CDs - There are some complaints behind the remastering of cds. Check out HowStuffWorks to learn more about complaints behind remastering cds.
HowStuffWorks Electronics answers your home theater system questions and more. Find explanations, reviews, videos and prices on cameras & photography, personal audio, home audio & video systems, HDTVs and cell phones. The surface of the drum is charged. An intense beam of light moves across the paper that you have placed on the copier's glass surface. Light is reflected from white areas of the paper and strikes the drum below. Wherever a photon of light hits, electrons are emitted from the photoconductive atoms in the drum and neutralize the positive charges above. Dark areas on the original (such as ...
Before compact discs, you had to rewind and fast-forward to get to a particular bit of information. Not so with digital storage -- the CD makes pinpointing data a split-second task. Find out how CDs (and CD-ROMs, CD-Rs, CD-RWs) hold and let you retrieve information. If you have ever wondered how MP3 files work, or if you have heard about MP3 files and wondered how to use them yourself, then this article is for you! In this article, you will learn about the MP3 file format and how you can start downloading, listening to and saving MP3 files onto CDs! Soon people realized that computers could be used to compose, record and edit MIDI data. Using simple desktop software called a sequencer, professionals and amateurs can use MIDI to record and edit multiple tracks of electronic music.Since MIDI is a universal standard, the recorded songs can be played back on any electronic musical instrument or MIDI-enabled device.
A robot is made up of the very same components. A typical robot has a movable physical structure, a motor of some sort, a sensor system, a power supply and a computer "brain" that controls all of these elements. Essentially, robots are man-made versions of animal life -- they are machines that replicate human and animal behavior. There are different kinds of internal combustion engines. Diesel engines are one type and gas turbine engines are another. Each has its own advantages and disadvantages. There is also the external combustion engine.The steam engine in old-fashioned trains and steam boats is the best example of an external combustion engine. The fuel (coal, wood, oil) in a steam engine burns outside the engine ...
Read-only memory (ROM), also known as firmware, is an integrated circuit programmed with specific data when it is manufactured.ROM chips are used not only in computers, but in most other electronic items as well. In this article, you will learn about the different types of ROM and how each works. This article is one in a series of articles dealing with computer memory, including: In this article, we'll find out how fluorescent lamps emit such a bright glow without getting scalding hot like an ordinary light bulb. We'll also find out why fluorescent lamps are more efficient than incandescent lighting, and see how this technology is used in other sorts of lamps.
You can find beauty supplies, clothing, jewelry, gourmet food, sporting goods, pet supplies, books, CDs, DVDs, computers, furniture, toys, garden supplies, bedding and almost anything else you might want to buy. What makes Amazon a giant is in the details. Besides its tremendous product range, Amazon makes every possible attempt to customize ... A reality show's segment producers or story editors usually assemble storyboards and shooting scripts, important tools for shaping the direction of the show. In the TV sitcom and drama world, these folks would be known as writers. But unlike writers, they're generally not recognized by the Writers Guild of America and so aren't union employees.
Some of the brightest minds in history have focused their intellects on the subject of light. Einstein even tried to imagine riding on a beam of light. We won't get that crazy, but we will shine a light on everything scientists have found so far. Before the invention of the light bulb, illuminating the world after the sun went down was a messy, arduous, hazardous task. It took a bunch of candles or torches to fully light up a good-sized room, and oil lamps, while fairly effective, tended to leave a residue of soot on anything in their general vicinity.. When the science of electricity really got going in the mid 1800s, inventors ...