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<\/a><\/p>\nUite un cod ajutator :<\/p>\n
\/*
\nMeasuring AC Current Using ACS712
\nroboromania.ro
\n*\/
\nconst int sensorIn = A0;
\nint mVperAmp = 185; \/\/ use 100 for 5A30A Module<\/p>\n
double Voltage = 0;
\ndouble VRMS = 0;
\ndouble AmpsRMS = 0;<\/p>\n
void setup(){
\nSerial.begin(9600);
\n}<\/p>\n
void loop(){<\/p>\n
Voltage = getVPP();
\nVRMS = (Voltage\/2.0) *0.707; \/\/root 2 is 0.707
\nAmpsRMS = (VRMS * 1000)\/mVperAmp;
\nSerial.print(AmpsRMS);
\nSerial.println(” Amps RMS”);
\n}<\/p>\n
float getVPP()
\n{
\nfloat result;
\nint readValue; \/\/value read from the sensor
\nint maxValue = 0; \/\/ store max value here
\nint minValue = 1024; \/\/ store min value here<\/p>\n
uint32_t start_time = millis();
\nwhile((millis()-start_time) < 1000) \/\/sample for 1 Sec
\n{
\nreadValue = analogRead(sensorIn);
\n\/\/ see if you have a new maxValue
\nif (readValue > maxValue)
\n{
\n\/*record the maximum sensor value*\/
\nmaxValue = readValue;
\n}
\nif (readValue < minValue)
\n{
\n\/*record the minimum sensor value*\/
\nminValue = readValue;
\n}
\n}<\/p>\n
\/\/ Subtract min from max
\nresult = ((maxValue – minValue) * 5.0)\/1024.0;<\/p>\n
return result;
\n}<\/p>\n