int analogPin = 7;
void setup() {
Serial.begin(9600);  // put your setup code here, to run once:
}

void loop() {
float val = analogRead(7);
float voltage = val*5/1024;
Serial.print("val=");
Serial.print(val);
Serial.print("voltage=");
Serial.println(voltage);  {
  if  val = 250,00;
    voltage = 1,22;
    else 
    }
delay(100);
}