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

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Science Fair Project Idea
thumbnail If you want to get your friend's attention at a crowded sporting event with lots of people cheering, you need to shout. If you're trying to do the same thing in a quiet library, a whisper works. The detection limit for each of our senses depends on the amount of "background" stimulation that is already present. This project uses an LED control circuit to investigate detection of changes in light levels. Read more
Elec_p039
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Time Required Short (2-5 days)
Prerequisites Understanding of Ohm's Law and an understanding of logarithms. Note: the biggest expense is a powered, solderless breadboard, which can be used for future explorations in electronics.
Material Availability Specialty items
Cost Very High (over $150)
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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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 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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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 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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- Less Details
Time Required Very Short (≤ 1 day)
Prerequisites None
Material Availability Readily available
Cost Low ($20 - $50)
Safety No issues
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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- Less Details
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 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 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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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
Science Fair Project Idea
thumbnail Do you hate shots? Do you complain about paper cuts? Imagine if you had to give yourself shots a couple of times a day, as well as prick your finger, on purpose, even more frequently. Of course, if you have diabetes you do not have to imagine this; it is your reality. People who have diabetes usually need to keep close track of how much sugar is in their blood (called their blood glucose levels)by testing a drop of blood from a finger prick. If there is too much sugar in their blood, some… Read more
HumBio_p040
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Time Required Average (6-10 days)
Prerequisites Some familiarity with electronic circuits and using breadboards would be helpful, though it is not required for this project. Completion of a basic chemistry class is also recommended before trying this project.
Material Availability A pump and other electronics parts must be specially ordered to do this project. See the Materials and Equipment list for details. Estimated project time includes shipping of specialty components.
Cost Average ($40 - $80)
Safety Some parts of the circuit can get warm during normal operation. Do not leave the circuit operating when unattended. Be very careful with your wiring to prevent short circuits from happening; short circuits can get very hot and cause plastic parts of the circuit to melt.
Science Fair Project Idea
thumbnail Light interacts with matter in a variety of ways—it can be absorbed, reflected, refracted (bent), and scattered. The scattering of light explains why the sky is blue, why milk is white, and why the Mississippi River is called "The Big Muddy." In this biochemistry science fair project, you will make an electronic device to measure the amount of scattered light in milk. You will also use the device to track the activity of protease (a type of enzyme) in pineapple juice, based on its ability… Read more
BioChem_p032
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- Less Details
Time Required Long (2-4 weeks)
Prerequisites A familiarity with basic chemistry is required. Experience with simple electronics would be helpful, but is not absolutely required. Although the procedure provides step-by-step instructions, this is a DIY (do-it-yourself) science fair project that may call for some creative problem solving on your part.
Material Availability Electronic components are required. See the Materials & Equipment list for details.
Cost Average ($50 - $100)
Safety Use caution when working with laser pointers. Wear safety goggles when using the drill.
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