Watch
Videos
A watch is a timepiece carried or worn by a person. It is designed to maintain a consistent movement despite the motions caused by the person's activities. A wristwatch is worn around the wrist, attac
A modern wristwatch featuring solar charging and Bluetooth capabilities
A 1983 Casio watch with touchscreen
A pomander watch from 1530, which once belonged to Philip Melanchthon and is now in the Walters Art Museum, Baltimore
A watch drawn in Acta Eruditorum, 1737
Quartz clock
Videos
Quartz clocks and quartz watches are timepieces that use an electronic oscillator regulated by a quartz crystal to keep time. The crystal oscillator, controlled by the resonant mechanical vibrations o
A basic analog quartz clock
Modern quartz wristwatch
Circuit board of an e block from a chronograph-wristwatch. The quartz crystal oscillator can be seen on right.
Disassembled analog quartz clockwork; quartz crystal oscillator (top left), Lavet-type stepping motor (left) with a black rotor sprocket and connected white and transparent gears (right). These gears control the movement of the second, minute and hour hands.