Potentiometer Example

The potentiometer sends a voltage of between 0 and 5VDC to the Arduino analog input A0. The Arduino sketch monitors input A0 and turns on Arduino outputs 10, 11 and 12 as the A0 input increases from 0 – 5VDC

Hardware Required

1 x Arduino Uno R3 or compatible
3 x LED
3 x 220 Ohm Resistor
1 x Potentiometer
1 x Solderless breadboard

Arduino Code

After you build the circuit plug your Arduino board into your computer, start the Arduino IDE, and enter the code below.

Get the Code!


/*

  Analog Input
  Demonstrates analog input by reading an analog sensor on analog pin 0 and

  turning on and off a light emitting diode(LED) connected to digital pin 13.

  The amount of time the LED will be on and off depends on the value obtained

  by analogRead().
  The circuit:

  – potentiometer

    center pin of the potentiometer to the analog input 0

    one side pin (either one) to ground

    the other side pin to +5V

  – LED

    anode (long leg) attached to digital output 10 through 220 ohm resistor

    cathode (short leg) attached to ground
  created by David Cuartielles

  modified 30 Aug 2011

  By Tom Igoe
  This example code is in the public domain.
  https://www.arduino.cc/en/Tutorial/BuiltInExamples/AnalogInput

*/
int sensorPin = A0;   // select the input pin for the potentiometer

int ledPin = 10;      // select the pin for the LED

int sensorValue = 0;  // variable to store the value coming from the sensor
void setup() {

  // declare the ledPin as an OUTPUT:

  pinMode(ledPin, OUTPUT);

}
void loop() {

  // read the value from the sensor:

  sensorValue = analogRead(sensorPin);

  // turn the ledPin on

  digitalWrite(ledPin, HIGH);

  // stop the program for  milliseconds:

  delay(sensorValue);

  // turn the ledPin off:

  digitalWrite(ledPin, LOW);

  // stop the program for for  milliseconds:

  delay(sensorValue);

}

Potentiometer Example

Hardware Required

Arduino Code

Schematic