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Project Idea
thumbnail You may be familiar with permanent magnets—the kind that hang on a refrigerator. But did you know that other magnets, called electromagnets, can be turned on and off? When turned on, electromagnets act just like permanent magnets, but if you turn them off, their magnetic properties disappear. Electromagnets are an important part of many electronic devices, like motors, loudspeakers, and hard drives. You can create an electromagnet with a simple coil of wire and a battery. In this science… Read more
Elec_p035
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Time Required Short (2-5 days)
Prerequisites None
Material Availability Readily available
Cost Low ($20 - $50)
Safety The electromagnet can become hot during periods of extended use.
Project Idea
thumbnail While you are probably quite familiar with battery-powered flashlights and watches, did you know there are motion-powered electronic devices—including some flashlights and watches—that can seemingly run forever without needing new batteries? The secret involves using magnets that generate electricity when they move around near a metal wire. In this science project, you will build your own simple motion-powered electrical generator that can power a series of tiny lights. 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.

Project Idea
thumbnail Electronic devices can be designed to detect dangerous fumes or other hazards, such as smoke or carbon monoxide. In this electronics project, you will build another potentially life-saving detector—a radon detector. Radon gas is radioactive and can pose a hazard to your health if you live in an area where it leaks from the ground. In this electronics science project, you will learn how to collect radon with an ordinary dusting cloth mounted on the intake of a fan, and then measure its… Read more
Elec_p064
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Time Required Very Long (1+ months)
Prerequisites Since the goal of this science project is to measure radon gas, you should have access to an area that has previously tested positive for radon with a commercial radon detection system. See the Experimental Procedure section for details. This is an advanced science project that will require creative problem solving on your part.
Material Availability While most of the parts for this science project are readily available, you might need to be creative about finding or making some of the parts.
Cost High ($100 - $150)
Safety Wear safety goggles when drilling and soldering. Adult supervision is recommended.
Project Idea
thumbnail Global warming, climate change, melting ice caps—these are all big events that have an impact our environment. What can we do to help reduce the impact? We can reduce, reuse, and recycle. What can cities do to help? Cities can eliminate waste by saving energy. Cities around the world are switching from incandescent traffic signals to LED traffic signals to save energy and money. That's because LEDs are more efficient than incandescent lamps, which means that LEDs produce more light… Read more
Energy_p003
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Time Required Long (2-4 weeks)
Prerequisites Prior experience with using a digital multimeter
Material Availability Specialty items (see Materials list)
Cost High ($100 - $150)
Safety Since this science project deals with electricity, adult supervision is recommended. The LEDs used in this project are used in traffic signals and are very bright. Do not look directly at the LED when it is in operation and be sure to wear your sunglasses. Be sure to wear safety goggles when operating power tools.
Project Idea
thumbnail Imagine telling your friends about your latest science project: using a battery to make a light turn on. You might get some blank stares...sounds a little boring and basic, right? Now tell them you will do it with a potato! Yes, you can actually turn fruits and vegetables into electric power sources! Batteries power many things around you, including cell phones, wireless video game controllers, and smoke detectors. In this science project, you will learn about the basics of battery science and… Read more
Energy_p010
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Time Required Average (6-10 days)
Prerequisites None
Material Availability This science project requires specialty electronics items. A Science Buddies kit is available. See the Materials and Equipment list for details.
Cost Low ($20 - $50)
Safety Do not eat the potatoes after they have been used as batteries.
Project Idea
thumbnail Have you ever wondered how a radio can grab signals that are transmitted through the air and convert them into sound? In this science project, you will build your own AM radio receiver from scratch and use it to listen to AM radio broadcasts. With your crystal radio you will be able to experiment with the circuit and the antenna to get the best reception. Read more
Elec_p014
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Time Required Average (6-10 days)
Prerequisites To do this science project, you must live in an area where you can receive at least one strong AM radio station. You can check for this with a car or portable radio.
Material Availability Specific circuit items are required. A Science Buddies kit is available for your convenience. See the Materials and Equipment list for details
Cost Average ($40 - $80)
Safety Never operate your crystal radio during a thunderstorm. When not in use, always disconnect your antenna from the radio circuit, and connect it directly to the ground rod. Be sure to wear safety goggles when installing the ground rod, especially if you are using a metal hammer. An adult's help might be necessary for some steps in the Procedure.
Project Idea
thumbnail The makers of sports drinks spend tens to hundreds of millions of dollars advertising their products each year. Among the benefits often featured in these ads are the beverages' high level of electrolytes, which your body loses as you sweat. In this science project, you will compare the amount of electrolytes in a sports drink with those in orange juice to find out which has more electrolytes to replenish the ones you lose as you work out or play sports. When you are finished, you might even… Read more
Chem_p053
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Time Required Short (2-5 days)
Prerequisites None
Material Availability You will need a digital multimeter for this science fair project. See the Materials and Equipment list for more details.
Cost Average ($40 - $80)
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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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.
Project Idea
thumbnail LEDs (light-emitting diodes) are electronic components that convert a portion of the electrical energy flowing through them into light. How does the intensity of the light produced vary with the current flowing through the LED? To find out, you'll build some simple circuits to vary the current flowing an LED. You'll also build a simple light-to-voltage converter circuit to measure LED output. Read more
Elec_p037
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- Less Details
Time Required Short (2-5 days)
Prerequisites Understanding of Ohm's Law.
Material Availability Specialty items
Cost Average ($50 - $100)
Safety No issues
Project Idea
thumbnail You probably know that turning off the lights and the water, and not wasting paper are all ways to help the environment and conserve our resources. Did you know that another way is to use fuel cells? A fuel cell is a device that converts the energy in chemicals to electricity and it creates no pollution. The starting chemical does not have to be something complex — in fact you it can even be water! In this science fair project try your own hand at converting water to electricity with the… Read more
Energy_p002
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- Less Details
Time Required Long (2-4 weeks)
Prerequisites None
Material Availability Specialty items required. See the Materials and Equipment list for details.
Cost High ($100 - $150)
Safety To do this science fair project, you will need to electrolyze water into hydrogen and oxygen. Hydrogen is flammable, so keep the fuel cell and hydrogen storage tank away from sparks.
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