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Home › Magazines › 2002 › December › Seconds Reference with Quartz Crystal

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Seconds Reference with Quartz Crystal

Published in issue 316, December 2002

Simple analogue quartz watches or watch movements, which can be obtained inexpensively by mail order or at flea markets, contain a circuit that drives the watch motor with pulses at the rate of one per second. If you build such a watch movement into a small circuit, you have an inexpensive but nevertheless accurate 1-second frequency standard.

Extra info, Updates

The RC time defined for IC2 needs to be increased by a factor of 10. This requires changing P1 to 1 MOhm and R7 to 330 kOhm.

Click below to download a PDF copy of this article from Elektor magazine.

 

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PDF Article (e02ch07.pdf)
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Please note. In view of the complexity of international markets, Elektor cannot guarantee the availability of components for this project.

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