"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.
When you put together a computer system, one piece of standard equipment you'll probably use is a surge protector. They safeguard your computer and electronic devices from power surges in your electrical system.
Drivers who can pass roadside sobriety tests -- by touching their noses or walking a straight line -- may still be over the legal limit for blood alcohol and be a hazard on the road. Breathalyzers help police find out who's really driving drunk.
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.