Arduino Projects Ideas - Potentiometer-Controlled LED Brightness

 Arduino Projects Ideas - Potentiometer-Controlled LED Brightness

Components:
Potentiometer
LED + 220Ω resistor
Arduino UNO

Wiring:
Potentiometer → A0
LED → Pin 9 via 220Ω resistor

Code:

void setup() {
  pinMode(9, OUTPUT);
}
void loop() {
  int val = analogRead(A0);
  analogWrite(9, val / 4);
}