 Hello friends, hope you all are fine and having fun with your lives. Today, I am going to share on How to measure Frequency using Arduino board. Its quite a simple tutorial but is an essential one especially when you are working on some power related project. Because in Power projects, you have to measure the frequency of AC voltages. I was working on a project in which I have to do dimming of AC Lamp so in that project I have to measure the frequency of AC signal.

I have designed this project using Arduino UNO and have simulated in the Proteus software, which you all know is my favorite simulating software. :) The code is also quite simple which I have given below for download. The simulation is also included in download package but again I suggest you to design it on your own. If you got into any trouble then ask in comments and I will try to resolve them. Anyways let's get started with How to measure frequency using Arduino.

#### How to Measure Frequency using Arduino ???

• You can download the simulation for this frequency measuring by clicking the below button:

• Now let's design this project in Proteus. So, first of all, design a simulation as shown in below figure:
• The small block attached with the pin # 2 of Arduino is a frequency meter.
• We can create any kind of frequency signal using this component.
• If you double click it then its properties will open up where you can change the frequency as shown in below figure:
• You can see in the above figure that I have setted the Clock Frequency to 2000 Hz.
• Now, let's design the programming code for this project. So, paste the below code in your Arduino software:
```#include <LiquidCrystal.h>

LiquidCrystal lcd(13,12,11,10,9,8);

long freq, tempo;
int pulsos;
boolean pulso;
void setup() {
pulso=HIGH;
pinMode(2,INPUT);
lcd.begin(20, 4);
lcd.setCursor(0,0);
lcd.print("Frequency =");
lcd.setCursor(1,2);
lcd.print("www.TheEngineering");
lcd.setCursor(4,3);
lcd.print("Projects.com");
}

void loop() {
tempo = millis();
{
if(pulso==HIGH)
{
pulsos = pulsos + 1;
}

pulso=LOW;

}
else{
pulso=HIGH;
}

if(tempo%2000==0){
freq = pulsos/2;
lcd.setCursor(12,0);
lcd.print(freq);
lcd.print("Hz");
pulsos=0;
}
}```
• Now using the above code, get your hex file from Arduino software and upload it in your Proteus software.
• Now once you are done then run your simulation and if everything goes fine then you will get results as shown in below figure: