Uploaded February 2021 | Updated September 2026, 2 weeks ago

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ATmega328 Timer 1 & Timer 2 are programmed to count rising edge pulses of input rectangular waveform within a period of 1000 ms. The total count represents the frequency of the input signal.

Link to code:
akuzechie.blogspot.com/2021/02/frequency-counter-using-arduino-timers.html

Contents:
0:00 Introduction
0:19 Theory of Frequency Counting
1:15 Block Diagram
1:39 Software Flowchart
2:53 C++ Sketch
5:56 Demonstration