Frequency Counter using Arduino Timers

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:

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

[postiemania]

This is a great project and will run on an Arduino Nano or even a pro mini. The code is well written and commented and available for download. I recommend this project for beginners as it is a good example of how to write and comment your code. I ran this code to compare to something similar I did using the 32768Hz output from a DS3231 RTC. Well presented Anas.

[ericgorder]

This is so well presented and useful! Thanks very much!

[marcosgiovanni]

Anas very good, of the continuity to the videos of Websocket.

[minastaros]

why do you put setup code into the loop()? That's where setup() is made for. And the loop() repeats itself, so no need for the loop inside. That would be a simple if().

[samshurp]

What is the max frequency it can measure, and what is the resolution of the frequency measurement?

[mertyasinaycicek]

Thanks for the video great project but I have a question.What is the error rate of the counter?

[sdgreen]

I need to input a sign wave to display RPM. Will this design trigger accurately with a sign wave?

[verarschn]

Thanks for the video! i'm using an additional frequency source but i having a hard time to track both frequency Inputs! Could you give me a hint how to attach an additional clock/timer/measurement for the secound frequency source?

[ViruteVentura]

Sir i need to write a code for arduino that calculates the frequency of a vpulse with timer 1 using counter mode only on pin2 of the arduino without resorting the interrupt service. Can you help me with such a code..

[michaeljoshuamanallo]

bro what is the max frequency that it can count please answer 🙏🙏

[incxxxx]

Why it does not count frequency higher than 7 MHz ??? Do you have any notion what is the reason? Theoretically there's no reason, signal, fx of 9MHz is OK, Timer1overflowCounts is less then 200, so what?