WINDICATOR

Published:2009/7/1 20:37:00 Author:May | From:SeekIC

Circuit Notes Two TTL ICs and a handful of other com-ponents are all that is needed for a circuit that will indicate which of four buttons was pressed first, as well as lock out all other entries. A logic 0 at one of the Q outputs, lights the ap; propriate LED and locks out other entries by taking the clock input low.



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