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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
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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
FADING IN
FADING IN
FADING IN
FADING IN
FADING IN
FADING OUT
FADING OUT
FADING OUT
FADING OUT
FADING OUT
Autoscroll
Clear output
9600 baud
Newline
Code Explanation
Read the line-by-line explanation in comment lines of source code!