Frequency Counter With Arduino




This is a simple and cheap arduino based frequency Counter cost less than 4$ it been very useful to measure small circuits

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Step 1: Parts for the Project

1.adruino uno or nano
2. Jumper cables
3. 16*2 lcd
4. Ic 555
5. 1uf cap

Step 2: Solder Pins to Lcd

Step 3: Connection to Arduino

Follow up the schematic and connect lace and potentiometer to arduino

Step 4: Copy the Same Code to the Adruino Sketch and Upload

#include , <LiquidCrystal.h>

LiquidCrystal lcd(2, 3, 4, 5, 6, 7);

const int pulsePin = 8; // Input signal connected to Pin 8 of Arduino

int pulseHigh; // Integer variable to capture High time of the incoming pulse

int pulseLow; // Integer variable to capture Low time of the incoming pulse

float pulseTotal; // Float variable to capture Total time of the incoming pulse

float frequency; // Calculated Frequency

void setup() { pinMode(pulsePin,INPUT);

lcd.begin(16, 2);


lcd.print("stark labs");


lcd.print(" Freq Counter ");

delay(5000); }

void loop() { lcd.setCursor(0,0);

lcd.print("Frequency is ");


lcd.print("stark labs ");

pulseHigh = pulseIn(pulsePin,HIGH);

pulseLow = pulseIn(pulsePin,LOW);

pulseTotal = pulseHigh + pulseLow; // Time period of the pulse in microseconds frequency=1000000/pulseTotal; // Frequency in Hertz (Hz)



lcd.print(" Hz");

delay(500); }

Step 5: Making of Frequency Generator

simple follow this schematic and connect those connections properly many people have problem in that 1uf capacitor will give 800hz-40khz and 101 capacitor will give 50hz-4khz

Step 6: Finalizing the Project

After you make the 2 schematic connect them together as shown in schematic and this is link for demo of the device

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    3 Discussions


    2 years ago

    I would add the code to be able to be downloaded, In the steps, it's all one solid jumble.

    2 replies

    Reply 2 years ago

    ... also seems to be missing the library included... (lcd.h?)