Reading Analog Voltage

Components Used:

  • 1x Breadboard
  • 1x Arduino Uno R3
  • 1x 5K variable resistor (potentiometer)
  • 2x Jumper

Connection:

Read Analog Voltage

Program:

/*
Program by: Ankit Modi
 Reading Analog Voltage using Potentiometer
 Reads an analog input on pin 0, converts it to voltage, and prints the result 
to the serial monitor.
 Graphical representation is available using serial plotter (Tools > Serial 
Plotter menu)
 Attach the center pin of a potentiometer to pin A0, and the outside pins to 
+5V and ground.
*/

// 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);
}

See the result in Serial Monitor.

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