#include <Servo.h>

Servo myservo;

int pos = 0;
int port = A0; 
int valeur = 0; 
float vin = 0; 
float imax = 0; 
int deg = 0;
int n = 0;

void setup() 
{
Serial.begin(9600);
myservo.attach(9);   
}


void loop()

{  
  for(pos = 0; pos <= 190; pos += 1) 
    {                                 
      myservo.write(pos);            
       valeur = analogRead(port);
       vin = (valeur * 5.0) / 1024.0; 
       n = n + 1 ; 
       if (vin > imax) 
         { (imax = vin); 
           (deg = n);
         }
           delay(50);
    }
      Serial.print(deg);
      (imax = 0);
      (deg = 0);
      (n = 0);
}