Electronic Gadgets

"Gadget" is a catch-all word these days for nifty devices. We've covered the basics, such as clocks & watches, plus delved into the world of present-day and future high-tech gadgets, such as digital jewelry and restaurant pagers.

Many radio-controlled clocks automatically sync their time with the atomic clock in Boulder, Colorado. How do they do it?

We all know it, and it always makes us cringe -- it's that terrible howling of a PA system. Everyone calls it feedback -- what's "feedback"?

Curious about how a self-winding watch works? Take a look at the mechanics inside a self-winding watch.

Indiglo watches convert electricity directly into light through the very efficient process of electroluminescence. Find out how it works!

Like most other electronics, microphones have evolved over time. The most modern versions convert waves of air pressure into electric signals, but different models do it in very different ways.

Magnetic recording is the backbone of the electronics revolution. Learn how this analog technology lets you store and erase data!

Have you ever looked inside a grandfather clock or a small mechanical alarm clock? Pendulum clocks are fairly complicated, but they rely on simple forces. Find out how pendulum clocks keep accurate time.

When you need to know the time, there's about a 50-50 chance you'll turn to some LEDs to find out. Have you ever wondered what goes on inside a digital clock or watch?

Wind-up alarm clocks have been around a long time, but they are still fun to explore. See what's inside this classic ticker!

Quartz watches actually use quartz crystals to keep time. How can they be so accurate? Find out why quartz makes such a great time keeper.

Nearly every item that you purchase from a grocery store, department store or mass merchandiser has a UPC bar code on it somewhere. Ever wondered why?