LED Brightness Control Using Potentiometer

Solving Approach:

How do you plan to solve it?

• Connections
  • Potentiometer middle pin → Arduino A0 (Analog input).
  • Potentiometer side pins → 5V and GND.
  • LED (with resistor, e.g. 220Ω) → PWM-capable pin (e.g., D9).
• Analog Input (ADC)
  • analogRead(A0) returns values from 0 → 1023 (10-bit ADC).
• PWM Output
  • analogWrite(pin, value) takes 0 → 255 (8-bit duty cycle).
• Mapping
  • Use map() to scale potentiometer values:
    ledValue = map(potValue, 0, 1023, 0, 255);
• Write to LED
  • Send mapped value to LED using analogWrite().

Code

/*Paste your code here*/
const int potPin = A0;   // Potentiometer input pin
const int ledPin = 9;    // PWM pin for LED

void setup() {
  pinMode(ledPin, OUTPUT);
}

void loop() {
  int potValue = analogRead(potPin);              // Read potentiometer (0–1023)
  int ledValue = map(potValue, 0, 1023, 0, 255); // Map to 0–255 for PWM
  analogWrite(ledPin, ledValue);                 // Adjust LED brightness
}



 

Output

Video

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Photo of Output

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