Why Do I Need To Convert from DC to AC? Most cars and motor homes derive their power from a 12-volt battery. In some cases, a heavy-duty 24-volt battery might be used. It’s important to know your vehicle’s voltage because the voltage rating of the inverter you select should match the voltage of the battery. […]
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Time for a quick compo. I have two copies of the excellent book Raspberry Pi User Guide to give away! It will help you get speedily underway if you are new to the device, with chapters on the Pi as a Home Theatre PC, as a productivity machine, and serving as a Web server.
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iPod touch Features It’s easy to think of the iPod touch as a stripped-down version of the iPhone instead of a souped-up iPod. The iPod touch and iPhone look similar, featuring the same wide touch screen with a sleek black border and single home button. The iPod touch is a little smaller and weighs a
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Types of Voice Mail There are several types of voice mail systems available. Such systems are designed to function differently based on who’s using them and where, what equipment and software is used, and who’s providing the phone message services. In general, two major systems include ones based on PC technology and proprietary systems using
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Adding Channels In the early 1950s, cable systems began experimenting with ways to use microwave transmitting and receiving towers to capture the signals from distant stations. In some cases, this made television available to people who lived outside the range of standard broadcasts. In other cases, especially in the northeastern United States, it meant that
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Are Atomic Clocks Radioactive? Atomic clocks keep time better than any other clock. They even keep time better than the rotation of the Earth and the movement of the stars. Without atomic clocks, GPS navigation would be impossible, the Internet would not synchronize, and the position of the planets would not be known with enough
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The Basics If you have read How Pendulum Clocks Work, you know that all clocks (regardless of technology) have a few required components: A source of power to run the clock In a pendulum clock, the weights or the springs handle this role. An accurate timebase that acts as the clock’s heartbeat In a pendulum
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Circuit Breaker: At Work in Your Home The power distribution grid delivers electricity from a power plant to your house. Inside your house, the electric charge moves in a large circuit, which is composed of many smaller circuits. One end of the circuit, the hot wire, leads to the power plant. The other end, called
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Ceiva and the Computerless This picture frame is designed to enable people with no computer, no digital camera and no computer skills to benefit from some aspects of the digital boom. The idea is that a person who does have a computer, a digital camera and computer skills buys the frame, sets up the account
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Types of Security Cameras Before you actually invest in a security camera system, you need to think about what you’ll be watching and what you need in order to watch it. The number of cameras you want is probably the first question that should come to mind. Are you focusing on one room in the
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