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Hobbies & Science : Society & Culture & Entertainment
How to Turn a 12-volt DC Into a 5- or 6-volt DC
Many electronic devices -- such as cell-phones and portable music devices -- obtain power by means of a DC adapter cable. These devices require a way to convert a DC power source that is greater than the five or six volts needed to charge the device. One simple way to convert a 12-volt DC power supp
DIY Dry Erase Board
Creating your own dry erase board gives you the opportunity to make it useful and pretty, instead of cluttering up your walls with plain, white boards. Using simple supplies and a bit of creativity, you can make your own dry erase board to match any room in your house. These homemade boards also mak
How to Paint on a Saw Blade
Use an old saw blade to make a great decoration for your garage, shop or back patio.
How to Cut a Cigar With a Knife
Cutting a cigar with a knife can take some practice and skill. Unlike precise cigar-cutting instruments like guillotine cutters or scissors, a knife uses a single blade to remove the cigar's end or cap. Using a knife can also take more hand dexterity. Cutting a cigar inefficiently can cause the wrap
How to Make Custom Badges
Making customized badges for specific groups such as the military or Boy Scouts generally includes embroidery. Sketching a rough drawing of the badge concept includes choosing the textile, embroidery threads and stitch types. Coloring the drawing with colored markers or pencils transforms the sketch
How to Make a Gun Rack
A gun rack is an ideal addition to your home if you are a hunter, collector or gun enthusiast. It can also make a good gift for the right person. Building a gun rack can be challenging, but the project just demands precise measurements, patience and some good woodworking skills. A four-gun rack is b
How to Make Ice Cream Using Dry Ice
The nature of dry ice, which is frozen carbon dioxide, makes it an interesting substance to use for science experiments and for general observation. You can use dry ice at home to make ice cream quickly. Dry ice has a much lower temperature than water ice, as the carbon dioxide solidifies as dry ice
How to Align T-Rex 600 Batteries
The T-Rex 600 Helicopter is a R/C model helicopter designed to be easy to fly while having all forms of rotary flight. When learning to fly the T-Rex 600 Helicopter, it is recommended that you have the assistance of an experienced pilot. The T-Rex 600 Helicopter uses a battery to power the motor. Do
How to Adjust Planer Blades
Your planer has been putting out smooth, flat boards for quite awhile. You might have started noticing a few chips or dips in the surface. This means you'll need to remove the knives from the cutter head and sharpen them. That's the easy part. Replacing the knives in the cutter head and adjusting th
How to Measure Planck's Constant With LEDs
In 1921, Albert Einstein won the Nobel Prize for his discovery of the photoelectric effect. When you shine a light of the right color on a conductor, it produces an electric current related to the energy in the light. If you measure the current carefully, you can determine Planck's Constant, a funda
English Long Bow Building Instructions
The English long bow originated in the Middle Ages. It was used extensively in medieval warfare in England between 1300 and 1600. The English long bow was also used for hunting. They were generally made of yew wood, although sometimes they were also manufactured from elm or ash wood. They had typica
How to Build Miniature Furniture & Room Settings
When it comes to creating your own miniature furniture and room settings, think small. Craft shops are stocked with items just the right size for dollhouses, including flowers. Balsa wood is soft enough for anyone to carve out shapes that can be made into tables and chairs. It doesn't require much f
Fun, Hands-On Science Projects and Experiments
Hands-on science activities and projects capture a child's attention and make learning fun. Through hands-on experiments, children can take an active role in learning. Most of the items needed for these projects can be found around a home or bought in a grocery store. Adult supervision is advised an
Horology Information
The art or science of measuring time is known as horology. The term comes from the Greek words 'hora'---meaning time--and 'logos'---denoting study. Watchmakers, clock-makers, horology scholars and aficionados are called horologists. Many associations and scholarly societies, as well as museums and l
How to Build Wood Doll Furniture
Dollhouses are a staple in a young child's life. Whether it is a large wooden dollhouse or one they created using shoe boxes and tape, every little girl has a house for her dolls. Wood furniture built for the wooden dollhouse is a project that takes time. All pieces are built basically the same way.
How to Find the Oxidation State & Ionic Charge of an Element
The oxidation state of an elements plays a critical role in its reactivity and stability. It describes the number of electrons exchanged with other elements during a chemical reaction. Oxidation states help a chemist decide if a given reaction is an oxidation-reduction type reaction, such as electro
How to Dye Blue Leather Black
To change the color of leather that has already been dyed once, you often have to dye it an intermediate color first to help the material make the transition. However, blue is already a transition color to black, so dyeing blue leather black does not require an intermediate coat. All you have to do
How to Calculate Kilowatts Given Voltage & Amperage
Scientists, engineers and electricians have a variety of units of measurement they can use to describe aspects of electrical flow. The most common unit of current, which is the amount of electrons which are moving through a wire, is the ampere, or amp (A). Voltage is a measure of the potential work
How to Identify Clock Mechanism Parts
Many clocks that look mechanical are in fact regulated by quartz. These are very accurate timepieces, and they don't have many parts. A true mechanical clock is regulated by its mechanism. Mechanical clocks have a number of key components, including those that create a distinctive chime.
Causes of the Greenhouse Gas Methane
Methane is a simple chemical compound made up of one carbon atom and four hydrogen atoms. It is a colorless, odorless gas at room temperature. Methane is a significant greenhouse gas. A greenhouse gas is one which, when released into the atmosphere, absorbs some of the thermal energy radiating fr