Frequency and Duty Cycle Measurement Using Arduino

Arduino is used to measure frequency and duty cycle of pulses and display them on LCD.

Aug 31, 2019

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17 respects

frequency measurement

pulse width measurement

signal parameter measurements

Components and supplies

Arduino UNO

Alphanumeric LCD, 20 x 4

Tools and machines

Breadboard, 270 Pin

Apps and platforms

Arduino IDE

Project description

Code

program to measure frequency and duty cycle and display it on LCD

c_cpp

measure frequency and duty cycle and display it on LCD

1#include <LiquidCrystal.h>
2
3LiquidCrystal lcd(8, 9, 10, 11, 12,   13);
4#define pulse_ip 7
5int ontime,offtime,duty;
6float freq,period;
7    
8void setup()
9{
10  pinMode(pulse_ip,INPUT);
11  lcd.begin(16, 4);
12   lcd.clear();
13  lcd.print("Freq:");
14  lcd.setCursor(0,1);
15  lcd.print("Ton:");
16   lcd.setCursor(0,2);
17  lcd.print("Toff:");  
18  lcd.setCursor(0,3);
19   lcd.print("Duty:");  
20}
21void loop()
22{
23   ontime = pulseIn(pulse_ip,HIGH);
24    offtime = pulseIn(pulse_ip,LOW);
25   period = ontime+offtime;
26   freq =   1000000.0/period;
27   duty = (ontime/period)*100; 
28   lcd.setCursor(4,1);
29    lcd.print(ontime);
30   lcd.print("us");
31   lcd.setCursor(5,2);
32   lcd.print(offtime);   
33   lcd.print("us");   
34   lcd.setCursor(5,0); 
35   lcd.print(freq);
36    lcd.print("Hz");
37   lcd.setCursor(6,3);
38   lcd.print(duty); 
39   lcd.print('%');   
40   delay(1000);
41}

#include <LiquidCrystal.h>

LiquidCrystal lcd(8, 9, 10, 11, 12,   13);
#define pulse_ip 7
int ontime,offtime,duty;
float freq,period;
    
void setup()
{
  pinMode(pulse_ip,INPUT);
  lcd.begin(16, 4);
   lcd.clear();
  lcd.print("Freq:");
  lcd.setCursor(0,1);
  lcd.print("Ton:");
   lcd.setCursor(0,2);
  lcd.print("Toff:");  
  lcd.setCursor(0,3);
   lcd.print("Duty:");  
}
void loop()
{
   ontime = pulseIn(pulse_ip,HIGH);
    offtime = pulseIn(pulse_ip,LOW);
   period = ontime+offtime;
   freq =   1000000.0/period;
   duty = (ontime/period)*100; 
   lcd.setCursor(4,1);
    lcd.print(ontime);
   lcd.print("us");
   lcd.setCursor(5,2);
   lcd.print(offtime);   
   lcd.print("us");   
   lcd.setCursor(5,0); 
   lcd.print(freq);
    lcd.print("Hz");
   lcd.setCursor(6,3);
   lcd.print(duty); 
   lcd.print('%');   
   delay(1000);
}

program to measure frequency and duty cycle and display it on LCD

c_cpp

measure frequency and duty cycle and display it on LCD

1#include <LiquidCrystal.h>
2
3LiquidCrystal lcd(8, 9, 10, 11, 12,  13);
4#define pulse_ip 7
5int ontime,offtime,duty;
6float freq,period;
7   
8void setup()
9{
10  pinMode(pulse_ip,INPUT);
11  lcd.begin(16, 4);
12  lcd.clear();
13  lcd.print("Freq:");
14  lcd.setCursor(0,1);
15  lcd.print("Ton:");
16  lcd.setCursor(0,2);
17  lcd.print("Toff:");  
18  lcd.setCursor(0,3);
19  lcd.print("Duty:");  
20}
21void loop()
22{
23   ontime = pulseIn(pulse_ip,HIGH);
24   offtime = pulseIn(pulse_ip,LOW);
25   period = ontime+offtime;
26   freq =  1000000.0/period;
27   duty = (ontime/period)*100; 
28   lcd.setCursor(4,1);
29   lcd.print(ontime);
30   lcd.print("us");
31   lcd.setCursor(5,2);
32   lcd.print(offtime);  
33   lcd.print("us");   
34   lcd.setCursor(5,0); 
35   lcd.print(freq);
36   lcd.print("Hz");
37   lcd.setCursor(6,3);
38   lcd.print(duty); 
39   lcd.print('%');  
40   delay(1000);
41}

#include <LiquidCrystal.h>

LiquidCrystal lcd(8, 9, 10, 11, 12,  13);
#define pulse_ip 7
int ontime,offtime,duty;
float freq,period;
   
void setup()
{
  pinMode(pulse_ip,INPUT);
  lcd.begin(16, 4);
  lcd.clear();
  lcd.print("Freq:");
  lcd.setCursor(0,1);
  lcd.print("Ton:");
  lcd.setCursor(0,2);
  lcd.print("Toff:");  
  lcd.setCursor(0,3);
  lcd.print("Duty:");  
}
void loop()
{
   ontime = pulseIn(pulse_ip,HIGH);
   offtime = pulseIn(pulse_ip,LOW);
   period = ontime+offtime;
   freq =  1000000.0/period;
   duty = (ontime/period)*100; 
   lcd.setCursor(4,1);
   lcd.print(ontime);
   lcd.print("us");
   lcd.setCursor(5,2);
   lcd.print(offtime);  
   lcd.print("us");   
   lcd.setCursor(5,0); 
   lcd.print(freq);
   lcd.print("Hz");
   lcd.setCursor(6,3);
   lcd.print(duty); 
   lcd.print('%');  
   delay(1000);
}

Downloadable files

frequency and duty cycle measurement using Arduino circuit

the circuit measures frequency and duty cycle of pulse using Arduino

frequency and duty cycle measurement using Arduino circuit

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