Tuesday, June 19, 2012

quartz clocks working..

How quartz clocks work: Clocks don't "tell" time, they *count* time. Clocks work by making some process repeat and then counting it. Quartz is a piezoelectric crystal, which means it vibrates when you feed electricity into it. So make quartz vibrate, count those vibrations, and you can count seconds very accurately. Here's how: 1) A battery feeds electricity to a circuit in your watch; 2) The circ...uit feeds power to a tiny quartz crystal, which vibrates 32,768 times per second. 3) The same cicuit counts the vibrations, divides by 32,768, and gets the number of seconds. 4) Once a second, the circuit drives a tiny motor. 5) The motor powers gears and they sweep the second, minute, and hour hands round the clock

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