2025 One Hertz Challenge: Electromechanical CMOS Clock Keeps In Step With Mains Frequency
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2025 One Hertz Challenge: Electromechanical CMOS Clock Keeps In Step With Mains Frequency
Some people can’t be bothered to read the analog face of a traditional clock. Some people cannot stand the low frequency “hum” of mains current. If you are in either of those categories, you probably don’t want to make [Christian]’s handsome and well-documented electromechanical CMOS clock. As you might guess from the name, the clock uses CMOS logic, based around a 12 bit counter, to provide the divider circuits 24 (daily) and 60 (minutes and se…
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