Arduino101 LEDFadeControl

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Control the brightness of your LED with a potentiometer (a.k.a. “pot”). The pot works just like the resistor/photoresistor combo we used in the Photo-Blink sketch. This sketch also introduces the map function, which helps make up for the difference between what the analog inputs read (0-1023) and what the PWM pins can put out (0-255).

Breadboard layout

LED Fade with Control bb.png


int ledPin = 11;
int potPin = 0;
int brt = 0;

void setup() {
  // put your setup code here, to run once:
  pinMode(ledPin, OUTPUT);

void loop() {
  // put your main code here, to run repeatedly: 
  brt = map(analogRead(potPin), 0, 1023, 0, 255);
  brt = constrain(brt, 0, 255);
  analogWrite(ledPin, brt);