ezLED Library - LED Fade In Fade Out Example

This tutorial shows how to use an example of ezLED library that fade in and fade out a LED.

Hardware Required

1×Arduino UNO or Genuino UNO
1×USB 2.0 cable type A/B
1×LED
1×220 ohm resistor
1×Breadboard
2×Jumper Wires
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About LED

About ezLED Library

Wiring Diagram

Arduino LED Library Wiring Diagram

Image is developed using Fritzing. Click to enlarge image

Arduino Code

Quick Steps

  • Install ezLED library. See How To
  • Connect Arduino to PC via USB cable
  • Open Arduino IDE, select the right board and port
  • On Arduino IDE, Go to File Examples ezLED LEDFadeInFadeOut example
/* Created by ArduinoGetStarted.com This example code is in the public domain Tutorial page: https://arduinogetstarted.com/library/led/example/arduino-led-fade-in-fade-out This example fade LED: + fade in LED in 3 seconds + fade out LED in 3 seconds + without using delay() function. This is a non-blocking example */ #include <ezLED.h> // ezLED library ezLED led(9); // create a LED object that attach to pin 9 bool isFadedIn = false; void setup() { Serial.begin(9600); } void loop() { led.loop(); // MUST call the led1.loop() function in loop() if (led.getState() == LED_IDLE) { if (isFadedIn == false) { Serial.println("FADING IN"); led.fade(0, 255, 3000); // fade in from 0 to 255 in 3000ms, fade immediately //led.fade(0, 255, 3000, 1000); // fade in from 0 to 255 in 3000ms, fade after 1 second isFadedIn = true; } else { Serial.println("FADING OUT"); led.fade(255, 0, 3000); // fade out from 255 to 0 in 3000ms, fade immediately //led.fade(255, 0, 3000, 1000); // fade out from 255 to 0 in 3000ms, fade after 1 second isFadedIn = false; } } // To stop fading immediately, call led.cancel() function }
  • Click Upload button on Arduino IDE to upload code to Arduino
  • Arduino IDE Upload Code
  • Open Serial Monitor to see result:
  • COM6
    Send
    FADING IN FADING IN FADING IN FADING IN FADING IN FADING OUT FADING OUT FADING OUT FADING OUT FADING OUT
    Autoscroll Show timestamp
    Clear output
    9600 baud  
    Newline  

Code Explanation

Read the line-by-line explanation in comment lines of source code!

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