Tutorial 3:How to wire a Potentiometer with Arduino - ashima-24/interactive_systems GitHub Wiki

About Potentiometer:

• A Potentiometer is a three-terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider. If only two terminals are used, one end and the wiper, it acts as a variable resistor or rheostat. The measuring instrument called a potentiometer is essentially a voltage divider used for measuring electric potential (voltage).

• Potentiometers are commonly used to control electrical devices such as volume controls on audio equipment.

---

Components Required:

• Arduino
• Potentiometer
• Jumper wires

---

Circuit Diagram

---

Youtube link:

• You can also make circuit connection by taking help of this link.

Note: Here in this video the Analog pin A0 has been selected and circuit diagram and code is given for Analog pin A2.

---

Code

/* Analog Read to LED
 * ------------------ 
 * * turns 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(). In the easiest case we connect
 * a potentiometer to analog pin A2. 
 *
 */

int potPin = 2;    // select the input pin for the potentiometer
int ledPin = 13;   // select the pin for the LED
int val = 0;       // variable to store the value coming from the sensor

void setup() {
  pinMode(ledPin, OUTPUT);  // declare the ledPin as an OUTPUT
}

void loop() {
  val = analogRead(potPin);    // read the value from the sensor
  digitalWrite(ledPin, HIGH);  // turn the ledPin on
  delay(val);                  // stop the program for some time
  digitalWrite(ledPin, LOW);   // turn the ledPin off
  delay(val);                  // stop the program for some time
}
 

---