The PCA200x are CMOS integrated circuits for battery operated wrist watches with a 32 kHz quartz crystal as the timing element and a bipolar 1 Hz stepping motor. The quartz crystal oscillator and the ...
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What is a quartz watch and how do they work?
We spend a lot of time at T3 drooling over the beautiful complexity of automatic mechanical watches. But that doesn’t mean the humble quartz should be forgotten about. Quartz watches are far cheaper ...
This circuit was developed to allow watch crystals to be used in an existing CMOS oscillator circuit that was to run from a 12V supply. The problem is that these crystals only work up to a supply ...
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