MHz FREQUENCY COUNTER


Posted on Feb 4, 2014

This is a schematic and block diagram of a 2-MHz frequency counter. It uses and LSI counter/display driver, LCD readout, and a, few logic chips for timebase and timing pulse circuitry. Q2 and Q3 form a signal (input) amplifier. The circuit contains a crystal oscillator built around U3-c and XTALl, which provides the pri-mary timing-reference signal


MHz FREQUENCY COUNTER
Click here to download the full size of the above Circuit.

. That signal is then divided twice to provide two additional timing ref-erences, giving the circuitry three selectable timing references. The ICM7224IPL is an integrated circuit that consists of the counter and display driver to drive the LCD-004 display.




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