int pot;

void setup() {
  // put your setup code here, to run once:

Serial.begin(9600);

}

void loop() {
  // put your main code here, to run repeatedly:

pot = analogRead(A0);
float tensao = 5.*pot/1023; 
Serial.print("Tensão do pot.: ");
Serial.print(tensao);
Serial.println(" [V]");
delay(500);

}