Tutorial Cara Menggunakan Sensor Arus ACS712 Di Arus AC

Program:

#include "ACS712.h"

/*
  This example shows how to measure the power consumption
  of devices in 230V electrical system
  or any other system with alternative current
*/

// We have 30 amps version sensor connected to A0 pin of arduino
// Replace with your version if necessary
ACS712 sensor(ACS712_30A, A0);

void setup() {
  Serial.begin(9600);

  // calibrate() method calibrates zero point of sensor,
  // It is not necessary, but may positively affect the accuracy
  // Ensure that no current flows through the sensor at this moment
  // If you are not sure that the current through the sensor will not leak during calibration - comment out this method
  Serial.println("Calibrating... Ensure that no current flows through the sensor at this moment");
  sensor.calibrate();
  Serial.println("Done!");
}

void loop() {
  // We use 230V because it is the common standard in European countries
  // Change to your local, if necessary
  float U = 230;

  // To measure current we need to know the frequency of current
  // By default 50Hz is used, but you can specify desired frequency
  // as first argument to getCurrentAC() method, if necessary
  float I = sensor.getCurrentAC();

  // To calculate the power we need voltage multiplied by current
  float P = U * I;

  Serial.println(String("I = ") + I + " A");
  Serial.println(String("P = ") + P + " Watts");

  delay(1000);
}