#include <SoftwareSerial.h>
#include <Stepper.h>

const int steps_rev= 200;
const int VoltIn=A3;
Stepper STM(steps_rev, 8, 9, 10, 11);
float Vgen11, delta_Vgen1, Vgen1_prev=0, delta_step=10, Vmax,Vgen1;
void setup() {
             STM.setSpeed(10);
             //pinMode(VoltIn,INPUT) ;
            // pinMode(VoltOut,INPUT) ;
             Serial.begin(9600);
}
/*float Volt1()
   { float Voltsense=analogRead(A0);
     float voltageGen1=(Voltsense);
     return voltageGen1;
    }
*/

void loop() {


            for (int q=0;q<1500; q++)
            {
             int Voltsense=analogRead(A0);
             Vgen1 = Voltsense * (5.0 / 1023.0);
             Vgen11+=Vgen1;
            }
            Vgen11=(Vgen11/1500);
            Serial.print("\t vgen= " );
            Serial.print(Vgen11);
            Serial.print("\t delta step = ");
            Serial.println(delta_step);

       delta_Vgen1=Vgen11-Vgen1_prev;

       Vgen1_prev= Vgen11;

           Serial.print("\t Vgen prev = ");
           Serial.print(Vgen1_prev);
           Serial.print("\t Delta Vgen = ");
           Serial.print(delta_Vgen1);

       if(delta_Vgen1 > .06)
          {
            delta_step=delta_step;
            Vmax=Vgen11;
          }


          if(delta_Vgen1< -.06)
            {
              delta_step= -delta_step;
              }

              STM.step(delta_step);
              delay(2000);

 }