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Why do you hear some radio stations better at night than in the day?
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Have you ever noticed a difference in the quality of radio signals depending on the time of day? See how radio signals and the Earth interact.
How Analog and Digital Recording Works
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Learn about analog and digital recording and shop for related products.
How Autofocus Cameras Work
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Ever wonder how your camera knows what you're looking at? Understand how autofocus cameras lock on to the object you're photographing!
How Batteries Work
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Batteries power the appliances you use daily. Check out battery experiments, the history of batteries, battery reactions and the chemistry behind battery power.
How Chess AI Works
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AI chess programs calculate their game plan based on formulas — algorithms that determine whether a position is "good" or "bad." But how do they really work?
How Digital Clocks Work
electronics.howstuffworks.com/gadgets/clocks-watches/digital-clock.htm
When you need to know the time, it's about a 50-50 chance you'll turn to some LEDs to find out. Ever wonder what goes on inside a digital clock or wristwatch? Find out about this basic digital technology -- and learn how to create your own digital timekeeper.
How Electric Motors Work
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Electric motors power almost everything in your kitchen, bathroom and office. But how do they perform their magic?
How Electronic Gates Work
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Would you like to be able to build your own digital devices? Logic gates are the basis of digital electronics. Find out what these gates do and how you can use them to start building your own devices.
How HDTV Works
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HDTV hit the market in 1998, and has ushered in an era of superior resolution and sound. Learn about HDTV and check out expert reviews for HDTV.
How Ham Radio Works
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Ham radio lets people talk across the globe, wirelessly and inexpensively. Learn how to get started in ham radio, from licenses to equipment, and check out two-way radio reviews.