how do quartz powered watches work?
In: Engineering
Quartz has a piezoelectric effect, when it moves it releases electricity, and when electricity is applied it moves.
So when a potential difference is applied, it moves, when it returns to its original shape a short, but consistent time later, it gives back a potential difference. We use this to create a system that oscillates with a set frequency, often a few kilohertz. And then we count the number of oscillations and tick the watch after every few thousand ticks.
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