Electronics Projects, Frequency Meter Circuit CMOS TTL article
"analog circuits projects, " tagged with
Frequency meter circuit is completely based on cmos integrated circuits with tll, frequency information led the series 74xx series integrates many features datasheet pinout 0xx dilsplay over. Frekansmetre circuit kicad source files and a pdf of the printed circuit schema files., an old system but uses a printed circuit board and the author has prepared and regularly.
Source: leon-instruments.blogspot.com alternative frequency-meter-circuit-cmos-ttl.RAR alternative link3