AZ-Delivery ACS712 Bedienungsanleitung Seite 10

Den Ausgang vom Sensor (grünes Kabel) verbinden wir mit dem analogen
Eingang Pin 0.
Beispielsketch:
// Measuring current using ACS712 - 5A, 20A and 30A modules
int rawData;
int servo = 9;
double average = 0;
double scaleFactor = 185.0;
double voltage = 0.0;
double current = 0.0;
void setup() {
Serial.begin(9600);
pinMode(servo, OUTPUT);
}
void loop() {
average = 0;
analogWrite(servo, 200);
// for stable measurement we take 100 measurements
// and average it
for(int i = 0; i < 100; i++) {
average += analogRead(0);
delay(1);
}
average /= 100;
voltage = (average / 1023.0) * 5000.0;
// for calibration to determine number 2494 at 0A current
// Serial.println(voltage);
current = (voltage - 2494) / scaleFactor;
// prints current in A
Serial.println(current);
delay(500);
}
// analog data read from sensor
// the PWM pin the servo is attached to
// for 20A module = 100.0
// for 30A module = 66.0
// the servo has to be in one position
// in mV
// in A