ezOutput Library - Single Blink Change Frequency Example

Hardware Required

1×Arduino UNO or Genuino UNO
1×USB 2.0 cable type A/B
1×220 ohm resistor
1×Push Button
1×(Optional) Panel-mount Push Button
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

About ezOutput Library

Wiring Diagram

Arduino Output Library Wiring Diagram

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Arduino Code

Quick Steps

  • Install ezOutput 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 ezOutput 04.SingleBlinkChangeFrequency example
/* * Created by ArduinoGetStarted.com * * This example code is in the public domain * * Tutorial page: https://arduinogetstarted.com/tutorials/arduino-output-library * * This example blinks an LED: * + with frequency changed according to the state of a button . if button is NOT pressed, blink slowly . if button is pressed, blink fast * + without using delay() function. This is a non-blocking example */ #include <ezOutput.h> // ezOutput library const int BUTTON_PIN = 7; ezOutput led(9); // create ezOutput object that attach to pin 9; void setup() { pinMode(BUTTON_PIN, INPUT_PULLUP); } void loop() { led.loop(); // MUST call the led.loop() function in loop() int buttonState = digitalRead(BUTTON_PIN); if(buttonState == HIGH) // button is not pressed led.blink(500, 500); // 500 milliseconds ON, 500 milliseconds OFF else // button is pressed led.blink(200, 200); // 200 milliseconds ON, 200 milliseconds OFF }
  • Click Upload button on Arduino IDE to upload code to Arduino
Arduino IDE Upload Code
  • Press and release the button
  • See LED's state

Code Explanation

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

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