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Others Like “Make Your Own Low-Power AM Radio Transmitter”

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Science Fair Project Idea
thumbnail Strike a key on the piano, and you hear the string vibrating. Just about any object vibrates when it's knocked, but how much and how fast? What properties of the material affect the way it vibrates? This project helps you find out. You'll build a simple light-sensing circuit for measuring the frequency of vibrating springs. Read more
ApMech_p015
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- Less Details
Time Required Short (2-5 days)
Prerequisites Windows/PC
Material Availability Readily available
Cost Average ($50 - $100)
Safety No issues
Science Fair Project Idea
thumbnail This is a good project for someone who is interested in both electronics and color vision. The equipment needed is on the expensive side, but if you continue studying electronics, you can use it again and again. Read more
Elec_p038
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- Less Details
Time Required Average (6-10 days)
Prerequisites To do this project you should be familiar with Ohm's Law. Experience building electronic circuits on a solderless breadboard is also helpful. The breadboard is the biggest expense, which can be used for future explorations in electronics.
Material Availability Specialty items
Cost Very High (over $150)
Safety Adult supervision required when using power drill.
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
thumbnail Wouldn't it be nice to avoid those nasty electric shocks you get after you've walked around on carpet and then shake a friend's hand, or all those crazy flyaways you get after brushing your hair? These are caused by static electricity. In this science fair project, you will build a super-sensitive charge detector to investigate the positive and negative electric fields created by static electricity. The detector can sense invisible electric fields, so try this science fair project to avoid the… Read more
Elec_p050
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Time Required Short (2-5 days)
Prerequisites You should be familiar with the concepts of atoms, electrons, and voltage. Familiarity with building circuits with a breadboard is helpful, but not required.
Material Availability Readily available
Cost Average ($40 - $80)
Safety No issues
Science Fair Project Idea
thumbnail What do the radio, TV, radio controlled cars, and cell phones all have in common? They all use invisible waves to transmit information. Find out which materials block radio waves, and which materials allow radio waves to pass through by doing this experiment. Read more
MatlSci_p036
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Time Required Very Short (≤ 1 day)
Prerequisites None
Material Availability Readily available
Cost Low ($20 - $50)
Safety No issues
Science Fair Project Idea
thumbnail Do you read the list of ingredients in foods and drinks before you buy them at the grocery store? If you do, you may have noticed that many of the items that are blue in color have the same dye, called FD&C blue 1. In this chemistry science fair project, you will build a simple colorimeter, a device that measures the concentration of colored chemicals in solutions. You will use the colorimeter to measure the concentration of blue dye #1 in sports drinks, and to track the rate at which the… Read more
Chem_p075
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Time Required Long (2-4 weeks)
Prerequisites Basic knowledge of chemistry. Some familiarity with electronics would be helpful, but is not required.
Material Availability Specialty item: Cuvettes can be purchased online. See the Materials and Equipment list for details.
Cost High ($100 - $150)
Safety Working with bleach is hazardous. Protect your skin and eyes.
Science Fair Project Idea
thumbnail In this project you'll learn how to make a piezoelectric pickup for acoustic guitar using inexpensive components. You can then connect your acoustic guitar to an amplifier, and record your own music. If you are interested in electronics and like playing acoustic guitar, this could be the perfect project for you. Read more
Music_p005
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- Less Details
Time Required Average (6-10 days)
Prerequisites You need to know at least the basics of playing guitar to do this project. You'll also need an inexpensive acoustic guitar and an electric guitar amplifier.
Material Availability Readily available
Cost Average ($50 - $100)
Safety Adult supervision recommended
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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- Less Details
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
thumbnail Objects that glow in the dark hold a special place in the imagination of both children and adults. The lights go out at night, but these odd things refuse to disappear. Where does the light come from? Do they work in any climate? In this science fair project, you will build an electronic device that measures the light given off by luminescent materials. The device will be used to study how temperature affects luminescence. Read more
Chem_p072
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- Less Details
Time Required Long (2-4 weeks)
Prerequisites A familiarity with basic chemistry is required. Also, some experience with electronics would be helpful. Although the circuit is fairly straightforward, especially if you use the kit, this is a DIY ("do-it-yourself") project that will call for some creative problem solving on your part.
Material Availability Any phosphorescent material will work for this project. If you want to use super-bright phosphorescent paints, they are available online. See the Materials & Equipment list for more information.
Cost High ($100 - $150)
Safety Use caution when using the drill or knife. Wear safety goggles when using the drill.
Science Fair Project Idea
thumbnail You have probably heard about using renewable energy sources like wind and solar power to provide electricity to homes and buildings, as well as hybrid or fully electric cars that use less (or zero) gasoline. But what about solar-powered robots? As robots become more common, it is increasingly important to use "green" energy sources to power them. In this project, you will build and test a popular robot called a bristlebot — a tiny robot made using toothbrushes—that can operate on… Read more
Robotics_p026
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Time Required Short (2-5 days)
Prerequisites None
Material Availability A kit containing all the electronics parts needed for this project can be found in the [# Link Name="Robotics_p026.1" Value="HtmlAnchor" #].
Cost Average ($40 - $80)
Safety No issues
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