Suppose you want to wire up a bank safe so it triggers an alarm whenever the door opens. How would that work in practice? You'd need electrical contacts on both parts of the door frame so when the door opened the circuit would be broken, triggering the alarm. But think how tricky it...
GPS Receiver Basics Like acell phone, aGPS receiverrelies on radio waves. But instead of using towers on the ground, it communicates with satellites that orbit the Earth. There are currently 27 GPS satellites in orbit -- 24 are in active use and 3 act as a backup in case another satellit...
In this article, we'll look at one interesting vision of the future, General Motor's remarkable concept car, the Hy-wire. GM may never actually sell the Hy-wire to the public, but it is certainly a good illustration of various ways cars might evolve in the near future. Contents Hy-...
Professional rammed earth builders use machines that are hooked up to air compressors. The air pressure does the work of tamping down the earth. When you first start ramming dirt, it makes a dull sound, but when it's adequately tamped, it will change to a ringing sound. Once the earth i...
Earth Leakage Circuit Breaker is a protection device used in electrical systems for detecting the leakage currents and interrupting the circuit. In an electrical circuit, the electric current flows from source to the load through the phase wire and from load back to the source through the neutral...
Congratulations:You’ve connected a C-Wire Adapter! You can now finish the installation of your new thermostat! NOT THE DIY TYPE? Contact a local professional partner. FIND A PRO NEED SOME EXTRA HELP? Chat live with a support agent.
A motor works on the same principles, but in the opposite direction -- it converts electrical energy into mechanical energy. To do this, a motor needs a special kind of magnet known as an electromagnet. In its simplest form, this consists of an iron bar wrapped in a coil of wire. If...
But instead of using towers on the ground, it communicates with satellites that orbit the Earth. There are currently 27 GPS satellites in orbit -- 24 are in active use and 3 act as a backup in case another satellite fails. In order to determine your location, a GPS receiver has to ...
Geology Store: Hammers, field bags, hand lenses, maps, books, hardness picks, gold pans. Earth Science Records: Highest mountain, deepest lake, biggest tsunami and more. Diamonds: Learn about the properties of diamond, its many uses, and diamond discoveries. ©...
What Are the Advantages of Wire Transfers? Wire transfers allow for the individualized transmission of funds from individuals or entities to others while still maintaining the efficiencies associated with the fast and secure movement of money. The sender can initiate a wire transfer quickly and the ...