#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);

}