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
1	×	Jumper Wires
1	×	(Optional) 9V Power Adapter for Arduino
1	×	(Recommended) Screw Terminal Block Shield for Arduino Uno
1	×	(Optional) Transparent Acrylic Enclosure For Arduino Uno

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About LED

Refer to Arduino - Led Blink tutorial

About ezLED Library

Refer to Arduino - ezLED Library Reference

Wiring Diagram

This image is created 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

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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