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ATMEGA_HALL_EFFECT/ATMEGA_HALL_EFFECT.ino

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+/*
+  Measuring Current Using ACS712
+*/
+#include "math.h"
+const int analogIn = A0;
+int mVperAmp = 185; // 185 pour 5A, use 100 for 20A Module and 66 for 30A Module
+int RawValue= 0;
+int ACSoffset = 2500; 
+double  mp_offset = 0.040;
+double Voltage = 0;
+double Amps = 0;
+
+void setup(){ 
+ Serial.begin(9600);
+ pinMode(A0, INPUT);
+}
+
+void loop(){
+  
+ int i = 0;
+ RawValue = 0;
+ // Somme du courant alternatif pendant 20 ms ==> 50hz
+ // Détermination du max et max pour hauteur de crete
+ int vmin = 1024;
+ int vmax = 0;
+ for (i = 0; i < 20; i++) {
+   int value = analogRead(analogIn);
+   if (value >= 0) {
+   RawValue += value;
+   vmax = max(value,vmax);
+   vmin = min(value,vmin);
+   } else {
+     i--;
+   }
+   delay(1); 
+   
+ }
+// Serial.print("Raw Value = " ); 
+// Serial.print(RawValue);
+ Serial.print("min = " ); 
+ Serial.print(vmin);
+ Serial.print(" max = " ); 
+ Serial.print(vmax);
+ 
+// Serial.print(" i =" );
+// Serial.print(i); 
+// RawValue = RawValue / i;
+ 
+ 
+ // Tension continue
+ // Voltage = (RawValue / 1023.0) * 5000; // Gets you mV
+ // Amps = ((Voltage - ACSoffset) / mVperAmp);
+ 
+ 
+ // La valeur maxi * racine carrée de 2 pour obtenir la tension "réelle"
+ // La tension efficace pour l'effet Hall étant réduite d'un facteur 0,707
+ Voltage = ((vmax - vmin) / 430.0) * 5000;
+ 
+ Amps = max(5.5 * (vmax - vmin) / 473.0 -0.0580, 0.0); // <= pour le bruit
+ 
+ 
+// Serial.print(" Raw Value = " ); // shows pre-scaled value 
+// Serial.print(RawValue); 
+ Serial.print("\t mV = "); // shows the voltage measured 
+ Serial.print(Voltage,3); // the '3' after voltage allows you to display 3 digits after decimal point
+ Serial.print("\t Amps = "); // shows the voltage measured 
+ Serial.print(Amps,3); // the '3' after voltage allows you to display 3 digits after decimal point
+ Serial.print("\t Watt = "); // shows the voltage measured 
+ Serial.print(Amps * 220,3);
+ Serial.print("\t WattH = "); // shows the voltage measured 
+ Serial.println(Amps * 220 / 1200,3);
+ 
+ 
+ delay(2500); 
+ 
+}