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We have great collection of free math video lessons and self-help tutorials from around the web in almost every high-school math subject. Updated daily, these video lessons are perfect for students looking for extra math help. They are also great for teac

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TechPosters: Technical Posters and Cheats for IT Guys

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PIR sensors allow you to sense motion, almost always used to detect whether a human has moved in or out of the sensors range. They are small, inexpensive, low-power, easy to use and don't wear out. For that reason they are commonly found in appliances and

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As an example we will create a standalone database using OpenOffice.org Base program. To show the principles, lets create a database of the nutritional information on UK food packets.

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Though the recipe does call for some flammable and toxic ingredients, curious chemists may want to check out these instructions for making your own magnetic ferrofluid over at Sci-Spot. Anyone come across a any better methods? Please drop a...

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If you want to learn how to play an instrument, why not go online to do it? We have a list of online apps that will help you rock with friends. Read this blog post by Don Reisinger on Webware.

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Regular expressions are a language of their own. When you learn a new programming language, they're this little sub-language that makes no sense at first

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I took one (bad) computer science class in college, and I'm not a web developer. So in early 2008, when I decided I was finally going to build a web site I'd been fantasizing about for years, I was starting from scratch.

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The word LASER is an acronym which stands for Light Amplification by Stimulated Emission of Radiation. It actually represents the principle itself but is nowadays also used to describe the source of the laser beam. The main components of a laser are the l

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A while back I got frustrated with the fact the LCD Projectors cost so much money to buy, and figured that it couldn't be so hard to build my own. So I took a 2 inch JVC active matrix LCD (no longer on the market, but the LCD's on the right work pretty we

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First thing to do is make a schematic in EAGLE Layout Editor. Once you have done this you can then design the layout using Eagle too. Making schematic first helps because Eagle will show you clearly if you make any mistakes with the PCB.

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In a previous Instructable, I provided an intro to schematic entry using CadSoft's EAGLE editor.
In this instructable, we'll make a printed circuit board from that schematic

I guess I should say that we'll make a PCB DESIGN; making the physical board is

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BEST Instructors have put together video demonstrations of common hand soldering tips and skills. These are not designed to be in place of live one on one training where repetitive skills and subsequent one on one feedback is given. Rather, they are quick

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This is a relatively simple, safe and cheap way to remove light or heavy rust from any ferrous object. I used this proc...

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DIY Live is a website geared towards providing quality Do-it-Yourself projects with the occasional technology update. It is written by Greg Lipscomb who has a bachelor’s degree in Electrical Engineering from Auburn University. Greg has a full year’s worth

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The world's most powerful (and only!) programmable RPN/Algebraic scientific calculator watch
Built entirely using off-the-shelf components!
And the software is OPEN SOURCE too!

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