Project 7 How to make a ammeter using Arduino UNO and ACS712 current sensor .
For 3-Phase Line
The code for making this project is given below,,,
const
int sensorIn1 = A0;
/*FOR Current measurement Sensor 1*/
const
int sensorIn2 = A1;
/*FOR Current measurement Sensor 2*/
const
int sensorIn3 = A2; /*FOR
Current measurement Sensor 3*/
int
mVperAmp = 66; // use 100 for 20A Module and 66 for 30A
Module & 185 for 10A module
double
Voltage1 = 0;
double
VRMS1 = 0;
double
AmpsRMS1 = 0;
double
Voltage2 = 0;
double
VRMS2 = 0;
double
AmpsRMS2 = 0;
double
Voltage3 = 0;
double
VRMS3 = 0;
double
AmpsRMS3 = 0;
void
setup(){
Serial.begin(9600); // Setting the baud rate of Serial Monitor
(Arduino)
delay(100);
}
void
loop(){
Voltage1 = getVPP1();
VRMS1 = (Voltage1/2.0) *0.707;
AmpsRMS1 = (VRMS1 * 1000)/mVperAmp;
Serial.print(AmpsRMS1);
Serial.println(" Amps RMS1");
Voltage2 = getVPP2();
VRMS2 = (Voltage2/2.0) *0.707;
AmpsRMS2 = (VRMS2 * 1000)/mVperAmp;
Serial.print(AmpsRMS2);
Serial.println(" Amps RMS2");
Voltage3 = getVPP3();
VRMS3 = (Voltage3/2.0) *0.707;
AmpsRMS3 = (VRMS3 * 1000)/mVperAmp;
Serial.print(AmpsRMS3);
Serial.println(" Amps RMS3");
}
float
getVPP1()
{
float result1;
int readValue1; //value read from the sensor
int maxValue1 = 0; // store max value here
int minValue1 = 1024; // store min value here
uint32_t start_time = millis();
while((millis()-start_time) < 1000) //sample for 1 Sec
{
readValue1 = analogRead(sensorIn1);
// see if you have a new maxValue
if (readValue1 > maxValue1)
{
/*record the maximum sensor value*/
maxValue1 = readValue1;
}
if (readValue1 < minValue1)
{
/*record the maximum sensor value*/
minValue1 = readValue1;
}
}
result1 = ((maxValue1 - minValue1) *
5.0)/1024.0; // Subtract min from max
return result1;
}
float getVPP2()
{
float result2;
int readValue2; //value read from the sensor
int maxValue2 = 0; // store max value here
int minValue2 = 1024; // store
min value here
uint32_t start_time = millis();
while((millis()-start_time) < 1000) //sample for 1 Sec
{
readValue2 = analogRead(sensorIn2);
// see if you have a new maxValue
if (readValue2 > maxValue2)
{
/*record the maximum sensor value*/
maxValue2 = readValue2;
}
if (readValue2 < minValue2)
{
/*record the maximum sensor value*/
minValue2 = readValue2;
}
}
result2 = ((maxValue2 - minValue2) *
5.0)/1024.0; // Subtract min from max
return result2;
}
float getVPP3()
{
float result3;
int readValue3; //value read from the sensor
int maxValue3 = 0; // store max value here
int minValue3 = 1024; // store min value here
uint32_t start_time = millis();
while((millis()-start_time) < 1000) //sample for 1 Sec
{
readValue3 = analogRead(sensorIn3);
// see if you have a new maxValue
if (readValue3 > maxValue3)
{
/*record the maximum sensor value*/
maxValue3 = readValue3;
}
if (readValue3 < minValue3)
{
/*record the maximum sensor value*/
minValue3 = readValue3;
}
}
result3 = ((maxValue3 - minValue3) *
5.0)/1024.0; // Subtract min from max
return result3;
}
If you have any query please comment below & keep watching.
