How Clocks Work

Clocks come in many different forms, from quartz watches to atomic clocks. Take a peek inside and learn what makes each kind tick.

How Digital Clocks Work

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?

How do radio-controlled clocks set themselves to the atomic clock in Colorado?

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

How does a self-winding watch work?

How does a self-winding watch work?

How does an Indiglo watch work?

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

How Pendulum Clocks Work

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.

How Quartz Watches Work

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.

How Smart Watches Work

The trend in technology is to get more and more "connectivity" into smaller and smaller packages. Find out how it's possible to access news, weather, sports, stocks, horoscopes, e-mail and more from a wristwatch.

Inside a Wind-up Alarm Clock

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