As he points out, the accuracy of a frequency counter is only as good as its gate ... on which the simplicity of the circuit is evident. There was a time when a project like this one would have ...

[mircemk] notes that the circuit would be more versatile with ... It’s probably not the most accurate frequency counter out there, and you’d probably want to calibrate it using a known-good ...

Prescalers are used in frequency-counter circuits to bring the frequency down to a level that can be handled by standard silicon signal-processing circuits. For example, a divide-by-two prescaler ...