Arduino Programming -- Analog Read to serial

AIM
       To read an analog signal and write it on the serial port(volt meter 0-5v) .


Hint :  ReadAnalogVoltage

  Reads an analog input on pin 0, converts it to voltage, and prints the result to the serial monitor.

  Attach the center pin of a potentiometer to pin A0, and the outside pins to +5V and ground.

Program


// the setup routine runs once when you press reset:
void setup()
{
  // initialize serial communication at 9600 bits per second:
  Serial.begin(9600);
}

// the loop routine runs over and over again forever:
void loop() {
  // read the input on analog pin 0:
  int sensorValue = analogRead(A0);
  // Convert the analog reading (which goes from 0 - 1023) to a voltage (0 - 5V):
  float voltage = sensorValue * (5.0 / 1023.0);
  // print out the value you read:
  Serial.println(voltage);
}

ADC

ADC pins in arduino

We can use this for a temperature sensor