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Wednesday, December 17, 2008


Computer Basics
What You See: On the Inside

While you may not often tinker with the insides of your computer, it is a good idea to know a little about what it is like in there. The diagram shows a basic arrangement. (This tower case is taller than normal and has wide feet for balance.)
The first task is to remove the case so we can see what's inside. Click on the parts in the diagram and you'll be moved to a description. Use the Return to Top arrows to get back to the diagram for another choice.

BOOKS OF THE TIMES; The Computer World, Inside and Out

''The Future of Ideas'' (no less), by Lawrence Lessig, is about the Internet today, where it is going and where it ought to go. His soft-spoken sobriety (not reflected in his choice of title) is a breath of fresh air in a crowded field where most authors would rather shout than talk.
He is a fund of clear, clean, useful information. If you need to know where ''MP3.com'' or ''Napster'' or ''CPHack'' or the Web in general stand today, Mr. Lessig is your man. His brief explanation of what ''consent decree'' means is the best I have ever read. Actually I couldn't care less what it means, but I had better know, and so had we all. This book is a public service.
But it is not merely that; it makes an argument, and here the results are mixed. The broad claim seems innocuous. The author boldly endorses ''free speech, privacy, access to content, freedom from excessive regulation''; he says that ''the original Net'' valued and protected these things, and that the Internet should continue protecting then, whatever it turns into.
Some of his specific assertions seem convincing and important, for example, about the future of copyright in the cybersphere. The Internet makes a new and higher degree of control possible; lawyers can monitor postings on Web sites as they cannot in, say, dorm rooms (we hope). ''Increasingly,'' Mr. Lessig writes, ''as activity that would be permitted in real space (either because the law protects it or because the costs of tracking it are too high) moves to cyberspace, control over that activity has increased. This is not a picture of copyrights imperfectly protected; this is a picture of copyright control out of control.'' To allow copyright controls to be tightened merely because it is possible to tighten them risks choking off the creation of new ideas and the dissemination of old ones.
The author's larger argument in favor of a free-and-open Internet, versus one where a few big companies have disproportionate power, is sensible and appealing. But the counterarguments he doesn't mention are distracting -- ghosts in the woodwork. The reader feels, sometimes, as if he were trying to concentrate on a magic act while the backdrop burns down.
Patents on software (for example) are in bad odor with Mr. Lessig, who notes without irony that Bill Gates has doubts about them, too. Well, Mr. Gates might. Software patents are the one weapon that penniless inventors and small companies wield against the Tyrannosaurus rexes that dominate the industry. A software patent creates an asset out of thin air. Investors do not put their money behind mere software ideas because, should the idea prove good, some large company (Microsoft is not the only candidate) can send a great, swarming army of programmers to munch the thing down and reproduce it fast. Mr. Lessig seems oblivious of the danger.
But on other issues, he is less than fair to the T. rexes. He is a booster of free software. ''The most important space for innovation in our time was built upon a platform that was free,'' he writes, and much of the Internet is built out of free software.


Explore the Curriculum

This section constitutes the curriculum portion of The Journey InsideSM. Use the links below or the tabs at the top of the page to complete any or all of the materials. Students and teachers alike may wish to bookmark this page for easy reference. The Journey InsideSM is divided into the following six sections:

Introduction to Computers ›This section provides short history of the computer, introduces the four major components of a computer, and compares computer "brains" with the human brain.

Circuits and Switches ›This section teaches students about electricity, electric circuits, and the difference between mechanical and non-mechanical (transistors) switches.

Digital Information ›This section explores the differences between the decimal and binary number systems and how the information is represented and processed using binary code.

Microprocessors ›This section investigates how microprocessors process information, demonstrates the size and the complexity of their circuitry, and explains how they are manufactured.

The Internet ›This section defines the Internet, then goes on to explain the World Wide Web, hypertext, URLs, packets, bandwidth, connection choices, search engines, and the need to critically evaluate the quality of the information found on the Web.

Technology and Society ›This section discusses the impact technological advances have on people's lives, with examples from the past and current day. Numerous side stories provide insights on ways the digital age is already affecting our lives. The final section talks about the accelerating rate of change and what we might expect to see in the near future.

A Look Inside Your Computer
Thursday January 17, 2008
It might look like a jumble of wires and circuitry right now, but everything inside your computer's case connects in very specific ways. After a quick tour of what-hooks-to-what, I'm sure you'll find that your computer is simpler than it might have appeared.
Welcome to Computing Science Inside...
The online resource to bring Computing Science alive.
The Computing Science Inside project, CS Inside, provides web based resources for teachers and science communicators to bring Computing Science alive in the classroom. A series of workshops are available that focus on ideas in modern technology and demonstrate to students how these applications and devices work using fundamental Computing Science concepts.
Visit Requests
As well as running the workshops themselves in the classroom, once they have registered, teachers can also request a visit from the CS Inside... team. The team will visit the school and deliver an agreed set of workshops for the pupils to demonstrate the materials to the school staff and enliven the pupils' lessons!!
Workshops
Computing Science Inside workshops are based upon problem solving activities designed to illustrate concepts in Computing Science and enable pupils to work through popular and useful algorithms. There are also variousmaterials available to aid the delivery of the workshops including teacher guides, pupil worksheets and demonstration materials. As well as the workshop material you can also find further information on the aims of the CS Inside project and the people behind it on this web site.
The Intel Developer Forum has become a major event on the technology industry calendar with keynotes that make international headlines. But at the heart of IDF are the sessions where developers get access to the details of new products and science from the world’s biggest chipmaker. This podcast is an excerpt from IDF Shanghai 2008. It’s an example from the session “Future Mobile Computer Vision and Industry Opportunities.”
Computer Parts: A Look at What's Inside
Computers are complex machines. Although when you look at a computer you tend to see just a monitor, mouse keyboard and brain. But it's really what's on the inside that allows computers to do the things they do. We all know that without the complexity of computer parts, a computer is nothing more than a plastic shell with keys.
Inside your computer is a maze of amazing computer parts. Not only are there batteries and memory cards, there are such essential computer parts as the hard drive, processor, storage, network card, modem, sound card, video card and, of course, the all important motherboard.
The two most important computer parts are the motherboard and the CPU. The motherboard is the glue that holds all computer parts together. If you take a peek inside your computer, it's the one large board in which all the other computer parts are attached to. The motherboard is the one unit where all the other units not only connect to, but power and communicate to them as well. The Central Processing Unit, or CPU, is the computer's brain. It handles all operational and data transfers. Remove the processor from the motherboard and you no longer have a computer.
Another must-have computer part is the storage media or memory. Computer memory, also known as RAM (random access memory) operates much like short-term memory. All of the important data a computer needs to function is stored on the memory computer parts, and is accessed millions of times a second to speed up the performance of your computer. An internal hard drive is also available on all computers, which acts as the long-term memory. This is where your data, software, pictures, etc. is stored so that no information is lost when the computer is turned off.
These two essential computer parts are what makes a computer worth dealing with. Last but not least, there are the all important batteries - parts that supply all other computer parts with energy and keep them running.
Inside the computer case

Some people get a little excited when they look inside a computer and see all the different electrical components and circuit boards. All the wires, connectors and data cables inside tend to be a little intimidating. Yet, all of today's computer repairs, replacements, upgrades and installations are getting easier and easier.
A technician could spend hours (at outrageous prices) to search for a specific chip or failed solder connection that's causing a particular problem. Repairs aren't done at the chip level anymore. Everything is very modular. It's quicker, easier, and much more economical to have the technician pop in a whole new video card or motherboard.

It's still important to know some of the different components and what they do. It can give you an insight as to which particular module may need replacement, and aids in the troubleshooting process.
It may only take 5 minutes to replace a particular FRU (Field Replaceable Unit), but it might require a lot more time to troubleshoot the problem and discover which module needs replacement.
Even if you don't plan on becoming A+ (A Plus) Certified, if you've come this far you must have an interest in computers. This is a great place to learn about what's inside that case.
Start this section with ESD (Electrostatic Discharge) precautions and work your way through in order. Once you understand ESD and the precautions you should take, go ahead and open the case. See if you can find the different components, connectors, and devices discussed. When you do, try and discover everything you can about it. What kind of chip is it? What does it do? What kind of socket does it fit into? How much data can it move at once? How fast is it?
If you have room on your desk, you can run your computer with the cover off * so you can look inside as you read (keep your hands out).
*Note: Only run your system with the cover off for a short period of time. Contrary to popular belief, leaving the cover off can interrupt the airflow, actually contributing to overheating in some cases. For short periods of time it should be OK. In fact, its often necessary when troubleshooting hardware. Its also a good time to make sure the CPU fan is working properly!
By the time you're done, you'll be removing and reinstalling some of the devices inside.
Look around for an old 286 or 386 computer. They can be picked up for less than 50 dollars, in working condition. Whether it's working, or not, you can learn an awful lot by taking it apart and putting it back together.
Please Remember: Do Not take apart a monitor or power supply, there is enough stored electricity inside to cause you serious injury!
Good luck, and always remember your ESD precautions!

Personal Computer from the Inside Out: The Programmer's Guide to Low-Level PC Hardware and Software (3rd Edition) (Paperback)by Murray, III Sargent (Author), Richard L. Shoemaker (Author)

Want to Know the inside of your computer ? Click Here

If you really want to know what really makes the PC works, read this one. It really helps people to understand the logic process that is inside each PC component. It teaches you the bases of electronics, from the diode to the serial ports, and Pentium processor. The explanations are simple, but it does not goes in deep, leaving you with the necessary knowledge to just understand the innerworkings of the computer, no to make one from the scratch.
The assembler part is very good,but it is intended for people with medium level skills in programming, hard to understand if your are a beginner.
I gave 4 stars because this book is a bit older, it does not cover things like the new USB, PCMCIA III, and DVD topics. I really use it as a reliable refference material.
What's inside a computer?

By Andy Walker
Question: Most of the stuff you write about is geared to intermediate or advanced computer users. How about some basic stuff for beginners? There are a lot of us new users who need information just for beginners.
Answer: This is a project I have been meaning to do for some time.


Computer fans pull a lot of dust inside the chassis. If undisturbed, the dust can interfere with ventilation, eventually causing parts to fail. If you have a service contract that covers maintenance, have your computer taken apart and professionally cleaned. Otherwise, follow these steps.

Tuesday, December 16, 2008



The Journey InsideSM is a collection of 35 interactive, online lessons for students to learn about technology, computers, and society. Many of the lessons utilize interactive, media-rich Flash* activities, virtual field trips, and videos demonstrating the ideas discussed to guide students to an increased understanding of the world of technology. Students, teachers, and anyone interested can work on the lessons and activities at their own pace to complete any or all of the six sections: Introduction to Computers, Circuits and Switches, Digital Information, Microprocessors, The Internet, and Technology and Society. Detailed instructional strategies written for the teacher extend the lessons and key concepts in ‘the classroom. There is no need to register. The curriculum is available for free, from any computer that is connected to the Internet. Students can work on the lessons from the classroom, during free moments, or even from home.
Abstract
We are going to discuss what hardware is inside your computer. We will be explaining what it is and how it words at a layman's level.




1. What make a computer work?

OK, time to pop off the cover of your desk top computer and have a look around. Most people never see the inside of the computer, but today we are going to explore it.
You don't really NEED to understand the parts of the computer to use it. Just as you do not need to be an auto mechanic to drive a car. But understanding what the parts of the computer are and how they work, might make some of the software more understandable. Besides it is sometimes useful to understand what is happening inside your computer when something goes wrong.

I should start with an apology to those of you who are viewing this on the web, and not in the class. For this talk I brought in a suite case full of hardware to examine in the class room. But it is a little hard to include that on the web page. ;-) I have included pictures and some diagrams, but it is not the same as having the object in your hand to view. So maybe it is time to consider pulling the cover off your own desktop computer. If you have a laptop, I am afraid you are out of luck for looking inside the box. With a laptop, you have the same components, and they work the same way. The difference is that they are all build on the motherboard since space and size are the reason you have a laptop.
Inside the Computer
Opening the case
Warning! Before deciding to open your computer case and touch or remove any parts inside, you should be aware that your body can contain static electricity that may be discharged to the circuits inside your computer. A static discharge can damage or ruin your computer. Therefore prior to doing any work inside your computer, you should get a grounding strap. A grounding strap can be attached to one of your wrists and be plugged into the wall (if it is the type made for a wall outlet). If you don't have the ground strap made for the wall outlet, you may need to attach your ground strap to a cold water pipe. A ground strap grounds your body using the earth ground in the wall outlet or from a cold water pipe. A grounding strap should cost less than twenty dollars and should be available at an electrical equipment store. You should always wear a ground strap when working inside your computer case. Especially when working with the microprocessor, memory, motherboard, or other plug in boards.
Inside the PC
The inside of the computer case contains everything that makes your PC run. Inside is the processor, memory, storage and everything else that supports the operation of your computer.