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This is a digital clock made using 4000 series. It was designed as decimal counting clock but it can be easily modded for BCD. You can set quarters of minutes, minutes, hours and 12/24 hrs mode.
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Feb 13, 2012. 9:01 AMMachine
says:
Very nice. Well thought out. It shows a thorough knowledge of CMOS 4000 series logic.
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