Inexpensive_frequency_counter_tachometer


Posted on Feb 5, 2014

This circuit shows an ICM7217 and an ICM7555 that are connected as a basic frequency counter. The connections between the ICM7217 and a common-cathode LED display are shown in Fig. 12-18. The frequency counter is calibrated (against a known standard) using RA as a coarse control and RB as a fine control.Notice that the ICM7555 timer is connected as an asta..


Inexpensive_frequency_counter_tachometer
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