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Hobbies & Science : Society & Culture & Entertainment
How to Build an EMF Tester
An electromagnetic field (EMF) test meter, or gaussmeter, measures the strength of magnetic fields. EMF test meters are often used for determining the strength of electromagnets or gauging magnetic fields around unshielded electronics. EMF meters have also been used in ghost hunting to search for ma
How to Compare Gel Electrophoresis
In analyzing DNA from different organisms, biologists must often compare the length of different fragments--either as part of DNA sequencing or DNA fingerprinting. The most common technique to do so is called gel electrophoresis.
How to Install a Capacitor for a Power Surge on a 12 Volt DC
Many 12-volt DC circuits encounter various types of power surges due to external or internal forces acting on the electrical system. Lightning, short circuits and component failures are the most common causes of power surges. Capacitors can be installed on DC circuits to help reduce the impact of a
How to Refill an Old Fashioned Lighter
Old-fashioned lighters are popular collectibles. Cigarette lighters were first invented in 1816. Improvements in the design and function of lighters in the 1930s led to increased popularity and use. Old-fashioned lighters use a liquid naphtha-based fuel and are refilled using methods that differ fro
How to Make a DNA Nucleotide Model
DNA (deoxyribonucleic acid) forms the genetic instructions for the multitude of life processes found in living organisms. These long molecules are built from subunits called nucleotides. Each nucleotide consists of the sugar deoxyribose attached to a phosphate group and one of four nitrogenous bases
How to Make a Lunchbox Guitar
Old metal lunchboxes are famously sturdy and attractive, and vintage lunchboxes have become sought-after collector's items. If you are musically inclined, you can take advantage of the durability and attractiveness of an old metal lunchbox by transforming it into a working acoustic guitar. Even if y
Furniture Rearrangement to Make a Room Look Larger
Some people enjoy the simplicity and coziness of smaller spaces, while others just can’t afford a larger space. Regardless of the reason, you can make a small space appear larger than it actually is by using a bit of interior design trickery. Arrange your furniture in a specific manner to crea
How to End Crown Molding in a Room
Crown molding pieces are wooden planks that have intricate designs. They are used to finish off the look of a room and are usually positioned at the place where the floor and ceiling intersect with the wall, or around doors. But one challenge is how to end the crown molding when you reach an edge or
How to Melt Aluminum Cans at Home
Empty aluminum beer and soda cans can be melted down into ingots. These compact ingots, also called pigs, can be recycled or remelted later for more advanced metalworking projects. The heat source used will be an ordinary propane torch. A steel cup or open-topped heavy steel canister wider than a cr
Chemical Reactions With Sugar
Sugar can react with different chemicals, sometimes producing spectacular results.Lauren Burke/Lifesize/Getty ImagesSugar reacts with many different substances to produce many effects. Some of these experiments produce fantastic visual effects, which can help to engage people with science...
In What Ways Do Green Algae Differ From Plants?
Plant or animal...some taxonomists think algae is neither.alga image by laviniaparscuta from Fotolia.comThere are over 7,000 species of green algae. These organisms are part of a taxonomic group in which some but not all the members descended from a common ancestor. They are also the most...
How to Design & Build a Scale Model
Hobby shops are filled with model kits for airplanes, ships, and trains. These kits come with all of the parts pre-measured and made to a specific scale, so the final product is accurate. Designing and building your own scale model requires mathematic calculations to create an accurate representati
RC Components
Radio-controlled (RC) vehicles are complex machines engineered with precise mechanics. These hobby-grade cars function at high speeds, often exceeding 40 miles per hour; therefore, it is important that you understand the anatomy of your vehicle to ensure that everything is functioning properly prior
How to Find Garnets in Maryland
Garnets are dark-colored crystals often found in certain mineralized areas within the rock. Due to the normal weathering of these rocks, garnets separate out from the host rock. They are then carried out by rainwater and accumulate along the water course, also known as a gully. There are two ways of
Homemade Wind Gauge
A wind gauge, referred to as an anemometer, collects wind and gives a reading for wind speed. Today, anemometers are built with many moving parts and can be very expensive. However, a wind gauge can be a fun construction project to help children become more involved with science and nature and can g
How Many Years Do Littered Glass, Plastic & Aluminum Contaners Last?
What happens to all the trash that leaves our houses every week? Most of what is discarded from a common household ends up in a landfill, an area where refuse is mixed with soil and microscopic organisms, in the hope that the trash will be broken down into a form that will someday add nutrients back
Information on How to Build Your Own Solar Cells
If you're interested in creating your own solar power but don't have access to high-impact silicon, automated chemical compressors and a factory workforce numbering in at least the hundreds, you'll be happy to learn that a less costly solar cell can be created from household items in an hour or less
Zippo Lighters Code & Styles
Over the years Zippo lighter have attained value as collectibles. Age and style are important factors that determine value of a Zippo lighter. Date codes on the bottom of each Zippo lighter have become an invaluable tool for collectors. Stamped codes signify the exact date when the lighter was produ
Thermocouple Types
Thermocouples are classified according to the maximum amount of temperatures they can measure, their function and their ruggedness. There are hundreds of types, but the most common ones are J, K, T, and E. Others are B, R, and S. They are constructed from rare metals, nickel based alloys or constant
How to Sell Scrap Gold From Pentium PCs
Pentium PCs, as with any other PC, contain gold that can be salvaged and sold to a gold refinery. One Pentium PC may not contain a lot of gold, but if you have a lot of PCs the amount could add up. However, most computers contain parts that are plated gold so the value is not great and some gold re