#include <Servo.h> 
 
Servo myservo;  

int pos = 0;    
int port = A0;    
int valeur = 0;  
float vin = 0;
float imax = 0;
void setup() 
{ 
  Serial.begin(9600);
  myservo.attach(9);   
 
} 

 
void loop() 

{ valeur = analogRead(port);
  vin = (valeur * 5.0) / 1024.0; 
  
  delay(1000);

  for(pos = 0; pos <= 180; pos += 1) 
  {                                 
    myservo.write(pos);            
     if (vin > imax) 
       { imax = vin; 
       
       }
  delay (1000);
}
  
  
  Serial.println(imax);
}