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Others Like “Rock On! Recording Digital Data with Magnets”

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Science Fair Project Idea
This is a challenging first computer science project. You'll learn the basics of how digital devices can represent numbers using only 0's and 1's, and you'll write a JavaScript program to convert numbers between binary, decimal and hexadecimal notation. Read more
CompSci_p005
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Time Required Short (2-5 days)
Prerequisites You should be able to:
  1. write a basic HTML file with a text editing program (like Notepad);
  2. create HTML [[ SourceCode []<FORM>[] SourceCode ]] elements for user input;
  3. write basic JavaScript functions using [[ SourceCode []Arrays[] SourceCode ]], [[ SourceCode []Strings[] SourceCode ]] and simple flow control statements (e.g., [[ SourceCode []if...else[] SourceCode ]], and [[ SourceCode []for[] SourceCode ]] or [[ SourceCode []while[] SourceCode ]] loops).
Help is available for each of these topics. See the Introduction section for details.
Material Availability Readily available
Cost Very Low (under $20)
Safety No issues
Science Fair Project Idea
thumbnail Today magnetic recording is used in audio and video cassette recorders, and computer disk drives. Did you know that you can also use an electromagnet to record and play back from a steel wire? In fact, this is how magnetic recording got started. This project shows you how to build a simple wire recorder. Read more
Elec_p015
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Time Required Long (2-4 weeks)
Prerequisites None
Material Availability Specialty items
Cost Average ($50 - $100)
Safety Eye protection required during construction
Science Fair Project Idea
What is your favorite font? Is it Chalkboard, Comic Sans, Futura, or Curlz? Whatever your favorite font is, you can test it out with this fun science project. Read more
CompSci_p013
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Time Required Very Short (≤ 1 day)
Prerequisites None
Material Availability This science project requires a PC with Microsoft Word or another word processing program that allows fonts to be embedded in text files.
Cost Very Low (under $20)
Safety No issues
Science Fair Project Idea
thumbnail You have probably read all about forms of alternative energy like solar and wind power. But what about human power? With the aid of a coil of wire and some magnets, you can generate electricity with nothing more than a flick of your wrist. In this project, you will build a small hand-powered electrical generator that can power a series of tiny lights. Get ready to save the planet and get some exercise at the same time! Read more
Energy_p009
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Time Required Average (6-10 days)
Prerequisites None
Material Availability This science project requires some specialty electronic components. A kit is available from the [# Link Name="Energy_p009.16" Value="HtmlAnchor" #]. The Time Required estimate includes time for gathering specialty materials. The actual project only takes 1 day.
Cost Average ($40 - $80)
Safety

Neodymium magnets are very strong and can pinch your fingers when they come together. You should keep them away from pets and small children because they can cause serious harm if ingested. As with any magnet, you should keep them away from computers, cell phones, and credit cards.

Adult supervision is required when using a hobby knife.

Science Fair Project Idea
thumbnail When you think of a motor, you may immediately think of a car, but you actually encounter other motors in your home every day. That's right, if you put on clean clothes from the washing machine, ate food from the fridge, or used a fan, you used an electric motor. In this electronics science project, you will make a simple electric motor with two magnets that "talk" to each other. As they interact, they will alternate between "liking" each other (pulling together), and "disliking" each other… Read more
Elec_p051
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- Less Details
Time Required Average (6-10 days)
Prerequisites You should be able to coil wire neatly (or find someone who can show you how) in order to make your electric motor work.
Material Availability Specialty items are required for this science project, and are available as a Science Buddies kit. See the Materials and Equipment list for details.
Cost Low ($20 - $50)
Safety

Never try to use a wall socket as power source for your motor.

Neodymium magnets are very strong. Follow the safety guidelines in the Procedure for working with these magnets.

Science Fair Project Idea
This is a good first-time programming project. You'll learn how to use JavaScript to create a simple program to alphabetize lists of words. You'll be able to run your program in your Web browser. Read more
CompSci_p002
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Time Required Short (2-5 days)
Prerequisites Familiarity with Web browser and text editing programs
Material Availability Readily available
Cost Very Low (under $20)
Safety No issues
Science Fair Project Idea
Sudoku puzzles have become extremely popular over the past couple of years. You can find books of puzzles for beginners to experts, and many newspapers print Sudoku puzzles daily. This project challenges you to write a computer program to check if your Sudoku solution is correct. Read more
CompSci_p023
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Time Required Average (6-10 days)
Prerequisites An understanding of the material covered in [# ProjectIdea Name="CompSci_p002" Value="HtmlAnchor" #]
Material Availability Readily available
Cost Very Low (under $20)
Safety No issues
Science Fair Project Idea
thumbnail Following a simple black line seems pretty easy, right? But think about it; how do you know what is the line and what is not the line? What if you wanted a robot to follow that line? How would it know what you wanted it to follow? Robots can use simple techniques to sense their surroundings and change their behavior based on what they see. In this engineering project, you will build your own robot that will follow a path without using complicated electronics or programming. Read more
Robotics_p021
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Time Required Average (6-10 days)
Prerequisites You should be familiar with, or be willing to learn how to wire circuits on a breadboard. A little soldering is necessary to complete this science project, so you should also be familiar with the procedure or be able to find a helpful friend or adult.
Material Availability Readily available. See the Materials and Equipment list for details.
Cost Average ($40 - $80)
Safety If you are using the coping saw to make the wheels, use caution and be sure to wear safety goggles. Some steps require soldering, which involves very high temperatures. Use caution when soldering and when using other building tools. An optional step involves a product that must used in an open area, following the manufacturer's directions.
Science Fair Project Idea
Jpeg, bmp, gif, tiff ... do these just look like words that you and your friends might make up for your own secret language? They are actually just a few of the file formats (which means "types") that you can use to save your favorite photo on your computer. But does it matter which one you use? Try this simple science fair project to find out and you'll never choose the wrong one again! Read more
CompSci_p020
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Time Required Very Short (≤ 1 day)
Prerequisites None
Material Availability Readily available
Cost Very Low (under $20)
Safety No issues
Science Fair Project Idea
thumbnail What happens if you hold a magnet next to water? You might think that water is not affected by magnetism, but in fact, the water is slightly repelled. Believe it or not, if the magnet is strong enough, you can use this effect to levitate objects that contain water, including insects and even small frogs! In this science project, you will learn about diamagnetism. Materials that are repelled by both poles of a magnet are called diamagnetic. The magnets you will use are not strong enough to float… Read more
MatlSci_p041
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- Less Details
Time Required Average (6-10 days)
Prerequisites None
Material Availability You will need to purchase some materials online. See the Materials and Equipment list for details.
Cost Average ($50 - $100)
Safety Neodymium magnets are extremely strong, and must be handled with care to avoid personal injury and damage to the magnets or to electronic appliances. Minor injury is possible and you should wear safety goggles whenever working with these magnets. Please read the important safety notes in the Experimental Procedure before beginning this science project.
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