MULTIPLEXED_CLOCK_DlSPLAY

Published:2009/7/1 2:08:00 Author:May | From:SeekIC

Multiplexed display suitable for LED readouts is provided by circuit using TTL counters to count 60-Hz Iine.When count reaches 10 o'clock, flip-flop M is set on evely cycle. Gate G3 then detects when time goes to 13 o'clock, and clears shift register.Carry flip-flop remains set, so 1 is loaded into hours digit to accomplish transition from 12:59:59 to 1:00:00. Seven-segment decoder driver Iooks at shift register output and drives segment lines of LED Leading hours digit is blanked,using RBI input on 9317．－G.Smith,Novel clock Circuit Provides Multiplexed Display,EDN Magazine．Sept 1,1972,p 50－51.



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