Arduino map Function Example

Wiring

Full code

const int potPin = A0;
const int ledPin = 9;

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

void loop() {
  int raw = analogRead(potPin);
  int pwm = map(raw, 0, 1023, 0, 255);
  analogWrite(ledPin, pwm);
}

How it works

This lesson matches the page title and gives a clean starting point for this exact example.

Common mistakes

Check board selection, wiring, libraries, power supply and serial monitor baud rate.