Voltage with analog input

 

int sensorValue = 0;

void setup()

{

  pinMode(A0, INPUT);

  pinMode(13, OUTPUT);

  Serial.begin(9600);

  int res=0.0049;

}

void loop()

{

  // read the value from the sensor

  sensorValue = analogRead(A0); //0-1023

  float volt=map(sensorValue,0,1023,0000,5000);

  Serial.print("Voltage =");

    Serial.println(volt/1000); 

  Serial.print("=");

  Serial.println(sensorValue);

  digitalWrite(13, HIGH);

  delay(sensorValue); // Wait for sensorValue millisecond(s)

  digitalWrite(13, LOW);

  //Serial.println(sensorValue*res);

  delay(sensorValue); // Wait for sensorValue millisecond(s)

}

voltage>5 vlot