Virtual IoT Lab DEI

ARDUINO CODE
/* -----------------------------------------------------------
Objective:
Read analog input from a 1kΩ potentiometer and control the
brightness of an LED using PWM output.

Components:
- 1 kΩ Potentiometer
- LED + 100 Ω current-limiting resistor
- Arduino Uno

Working:
The 1kΩ potentiometer outputs an analog voltage (0–5V) to A0.
Arduino reads this voltage (0–1023) and maps it to 0–255,
which is used to control LED brightness on pin 9 via PWM.
   ----------------------------------------------------------- */

const int potPin = A0;     // Potentiometer connected to analog pin A0
const int ledPin = 9;      // LED connected to PWM pin 9
int potValue = 0;          // To store analog input value
int ledValue = 0;          // To store PWM output value

void setup() {
  pinMode(ledPin, OUTPUT);   // LED pin set as output
  Serial.begin(9600);        // Start serial communication
}

void loop() {
  potValue = analogRead(potPin);                 // Read potentiometer value (0–1023)
  ledValue = map(potValue, 0, 1023, 0, 255);     // Convert to PWM brightness (0–255)

  analogWrite(ledPin, ledValue);                 // Adjust LED brightness
  Serial.println(potValue);                      // Display raw potentiometer value

  delay(100);  // Short delay for stable output
}
Start Simulation
