This article shows that not all
frequency meters need to be
complex and expensive. With
the aid of some standard logic
it is possihle to determine the
frequenq of digital signals. The
counter makes use of two
3-digit BCD counters that have a
multiplexed output with buffer
memory and a reset input. The
multiplexed output signal is
converted by an integrated
BCD-to-7-segment converter and
then applied to an LED display.
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