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What do the little boxes that the phone company has around our neighborhood do?
electronics.howstuffworks.com/question400.htm
If you have underground phone wiring in your neighborhood, you'll see many of these little boxes. Learn how underground phone wiring works.
Why do batteries seem to go dead and then come back to life if you let them rest?
electronics.howstuffworks.com/everyday-tech/question390.htm
Why do batteries seem to go dead and then come back to life if you let them rest? Learn about dead batteries and battery life.
How does a vibrating cell phone or pager work?
electronics.howstuffworks.com/question368.htm
I have both a pager and a cell phone that vibrate instead of ringing when I get a call. How does that work?
10 Types of Microphones
electronics.howstuffworks.com/gadgets/audio-music/question309.htm
Microphones have been around in some form for more than 150 years. Modern mics incorporate fiber optics, microchips, and even lasers to suit a variety of audio needs.
CCD vs. CMOS Censor: What's the Difference?
electronics.howstuffworks.com/cameras-photography/digital/question362.htm
CCD and CMOS image sensors both convert light to electrons in a digital camera. Learn the differences between CCD and CMOS sensors.
Do certain radio wave frequencies (like those used by cell phones) pose health risks?
electronics.howstuffworks.com/question4.htm
Do certain radio wave frequencies pose health risks? If so, is it safe to live within a quarter mile of a cellular phone tower or a radio antenna?
How Does a Camera Obscura Device Work?
electronics.howstuffworks.com/question131.htm
A pinhole camera is the simplest camera possible. To get a better understanding of how they work, read more about camera obscura principles.
How To Tell if Your Phone Is Tapped
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It's possible and relatively easy for someone to tap into your phone line or cell phone. With a few tips, it's also easy to tell if someone tapped your phone.
How do digital answering machines work?
electronics.howstuffworks.com/question21.htm
What exactly are the components of a digital answering machine? How does voice get recorded? And then, how is it played back on demand?
How does a long-distance call work?
electronics.howstuffworks.com/question354.htm
Today's computerized long-distance call systems are based on previous technologies. Learn the history of long-distance calling.