Question

Power Factor Code Arduino

Develop a Power factor Program in C and upload it into your Arduino

#include <LiquidCrystal.h>

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

Answer 1

#include <LiquidCrystal.h>
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
// Define Constants

int pin = 7;
float rads = 57.29577951; // 1 radian = approx 57 deg.
float degree = 360;
float frequency = 50;
float nano = 1 * pow (10,-6); // Multiplication factor to convert nano seconds into seconds

// Define float variable

float pf;
float angle;
float pf_max = 0;
float angle_max = 0;
int ctr;

void loop()
{
for (ctr = 0; ctr <= 4; ctr++) // Perform 4 measurements then reset
{
// 1st line calculates the phase angle in degrees from differentiated time pulse
// Function COS uses radians not Degree's hence conversion made by dividing angle / 57.2958
angle = ((((pulseIn(pin, HIGH)) * nano)* degree)* frequency);
pf = cos(angle / rads);

if (angle > angle_max) // Test if the angle is maximum angle
{
angle_max = angle; // If maximum record in variable "angle_max"
pf_max = cos(angle_max / rads); // Calc PF from "angle_max"
}
}
if (angle_max > 360) // If the calculation is higher than 360 do following...
{
angle_max = 0; // assign the 0 to "angle_max"
pf_max = 1; // Assign the Unity PF to "pf_max"
}
lcd.begin(16, 2);
// Print a angle to the LCD.
lcd.print(float, pf);
angle = 0; // Reset variables for next test
angle_max = 0;
}