Other Arduino Codes and Videos by Robojax

Blink LED using millis() with different ON and OFF time Arduino

Blink LED using millis() with different ON and OFF time Arduino

This code is for video on how to use millis function to achieve different ON and OFF time in creating LED blink.

Resources for this sketch


 /*
 * LED Blink with millis() with different time interval of ON and OFF time
 * Written by Ahmad Shamshiri for Robojax.com and Robojax YouTube channel
 * written on Aug 05, 2019 in Ajax, Ontario, Canada at 12:41
 * Watch video instruction:https://youtu.be/rUtDfadf8Jk
 * Watch introduction video to millis(): https://youtu.be/u2HsiTS8niQ
 
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 *  * This code is "AS IS" without warranty or liability. Free to be used as long as you keep this note intact.* 
 * This code has been download from Robojax.com
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
const int LEDpin = 3;
const long onDuration = 100;// OFF time for LED
const long offDuration = 500;// ON time for LED
int LEDState =HIGH;// initial state of LED

long rememberTime=0;// this is used by the code

void setup() {
  pinMode(LEDpin,OUTPUT);// define LEDpin as output
  digitalWrite(LEDpin,LEDState);// set initial state
}

void loop() {
  // Robojax LED blink with millis()

 if( LEDState ==HIGH )
 {
    if( (millis()- rememberTime) >= onDuration){   
    LEDState = LOW;// change the state of LED
    rememberTime=millis();// remember Current millis() time
    }
 }
 else
 {   
    if( (millis()- rememberTime) >= offDuration){     
    LEDState =HIGH;// change the state of LED
    rememberTime=millis();// remember Current millis() time
    }
 }

 // Robojax LED blink with millis()
 digitalWrite(LEDpin,LEDState);// turn the LED ON or OFF

}// loop ends   

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