#include <LiquidCrystal.h>    // include Arduino LCD library
 
// LCD module connections (RS, E, D4, D5, D6, D7)
const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7); 
void setup() {
  lcd.begin(16, 2);           // set up the LCD's number of columns and rows
  lcd.setCursor(0, 0);
  lcd.print("Power Factor:");
  //analogReference(INTERNAL);  // set ADC positive reference current to 1.1amp (internal)
    
}
const int xorOutputPin = 2; // Pin connected to XOR gate output
unsigned long pulseWidth;
double phaseAngle, powerFactor;

void setup() {
  pinMode(xorOutputPin, INPUT);
  Serial.begin(9600);
}

void loop() {
  // Measure the pulse width in microseconds
  pulseWidth = pulseIn(xorOutputPin, HIGH);

  // Convert pulse width to phase angle here
  // ...

  // Calculate power factor
  powerFactor = cos(phaseAngle);

  // Display the power factor
  Serial.print("Power Factor: ");
  Serial.println(powerFactor);

  // Add a delay between readings if necessary
  delay(1000);
 lcd.setCursor(0, 1);
//lcd.print(buf); 
 lcd.print(v1);
  delay(500);
 
}
 
// end of code