• Skip to main content
  • Skip to primary sidebar

Homemade Circuit Projects

Need circuit help? Post them in the comments! I've answered over 50,000!

Blog | Categories | About | Contact | Calculators-online
You are here: Home / Lamps and Lights / Blinking 3 LEDs (R,G,B) Sequentially Using Arduino Circuit

Blinking 3 LEDs (R,G,B) Sequentially Using Arduino Circuit

Last Updated on June 23, 2019 by Swagatam 6 Comments

In this post I have explained how to run or blink three LEDs in sequence using Arduino. The post was written and submitted by: Jack Franko

Table of Contents
  • DESCRIPTION

warning message: electricity is dangerous, proceed with caution

PROGRAM
/* make RGB LEDs to blink in series one by one at interval
of 1000MS */

int R = 12;int G = 11;int B = 10;
void setup(){  pinMode
(R,OUTPUT);  pinMode
(G,OUTPUT);  pinMode
(B,OUTPUT);

}
void loop(){  digitalWrite
(R,HIGH);  delay (1000);  digitalWrite
(R,LOW);  delay (1000);  digitalWrite
(G,HIGH);  delay (1000);  digitalWrite
(G,LOW);  delay (1000);  digitalWrite
(B,HIGH);  delay (1000);  digitalWrite
(B,LOW);  delay (1000);

}

DESCRIPTION

Today, We are  going
to learn to turn on and off  3 LEDs (RED, GREEN, BLUE) one by one at the interval of
1000MS that is one second.
int R = 12;int G = 11;int B = 10;

as we are aware of integer statement we had learned before ,
today we will use integer R,G & B which will be set  on arduino pin no 12, 11 and 10 respectively.
We are using R,G and B for led colors  to set on and off it confidentially to make less complicated and easy to understand what we are doing.
After setting all integers as shown in program above, we will set the main program part which is void setup stated as below

void setup(){  pinMode
(R,OUTPUT);  pinMode
(G,OUTPUT);  pinMode
(B,OUTPUT);

here we are stating the pine mode as output with previously set integer ie. R for pin no 12, G for pin no 11 & B for pin no 10.  After stating arduino pin with pinmode  as output with integer tis time to set our loop for all pins to work with. Here 2nd main function is void loop as stated below.

void loop(){  digitalWrite
(R,HIGH);  delay (1000);  digitalWrite
(R,LOW);  delay (1000);  digitalWrite
(G,HIGH);  delay (1000);  digitalWrite
(G,LOW);  delay (1000);  digitalWrite
(B,HIGH);  delay (1000);  digitalWrite
(B,LOW);  delay (1000);

} Here in statement of loop we are telling arduino to work with pin no 12 which is stated as R in integer and output in void setup. We will tell arduino to set pin no 12 at position “high” which means “ON” and wait for one second which 1000MS in arithmetical language with the help of function “delay” . script stated below will set led to on position and it will wait for 1 second but Arduino will not understand that what to do after waiting for 1 second, this will leads to stay led in on position for long.

  digitalWrite
(R,HIGH);  delay (1000);

so after  one second we must tell arduino to set pin no” 12” ie” R” to position” low”  which is “OFF”.

  digitalWrite
(R,LOW);

the statement stated above will set the led off . If we dint comment to wait for 1 second Arduino will continue to read the loop and turn the LED  to “ON” position frequently .so at this stage we have to comment and state the delay function to tell Arduino that after pin no 12 in “ OFF” wait for 1 second which 1000MS.

  delay (1000);

this is a complete loop for pin no 12 which we had stated for RED LED. This will result to put ON the led and wait for 1 second and OFF the LED and wait for 1 Second. After this we have to set the same loop for GREEN and BLUE LED which is as follows.

  digitalWrite
(G,HIGH);  delay (1000);  digitalWrite
(G,LOW);  delay (1000);  digitalWrite
(B,HIGH);  delay (1000);  digitalWrite
(B,LOW);  delay (1000);

this program will set three LEDs R, G & B to turn “ON” and “OFF” respectively for long time. Her you can program more then 3 LEDs also to turn on and off as you wish. This tutorials are for Newbees to understand the program and to play with Arduino.

You'll also like:

  • 1.  LED Star Circuit
  • 2.  Fish Aquarium Oxygen Generator Circuit
  • 3.  Simple Hi Efficiency LED Torch Circuit
  • 4.  Glittering LED Flower Circuit [Multicolored LED Light Effect]
  • 5.  3 Best Joule Thief Circuits
  • 6.  Cube Light Circuits

Filed Under: Lamps and Lights Tagged With: Arduino, Blinking, LEDs, Sequentially

About Swagatam

I am an electronics engineer and doing practical hands-on work from more than 15 years now. Building real circuits, testing them and also making PCB layouts by myself. I really love doing all these things like inventing something new, designing electronics and also helping other people like hobby guys who want to make their own cool circuits at home.

And that is the main reason why I started this website homemade-circuits.com, to share different types of circuit ideas..

If you are having any kind of doubt or question related to circuits then just write down your question in the comment box below, I am like always checking, so I guarantee I will reply you for sure!

Previous Post: « Tuned Infrared (IR) Detector Circuit
Next Post: Make this Simple Set Reset Circuit using IC 555 »

Reader Interactions

Comments

  1. axel carreon says

    February 27, 2023 at 11:59 pm

    Hi Swagatam,

    Im a newbee on Arduino but willing to learn basics. What type of Arduino kit will i use? For the blinking 3 LED’s.

    Reply
    • Swagatam says

      February 28, 2023 at 9:03 am

      Hi Axel, you can use an Arduino UNO board. For more information on Arduino basics, you can refer to the following post:
      https://www.homemade-circuits.com/learning-basic-arduino-programming-tutorial-for-the-newcomers/

      Reply
  2. Sammy Schutz says

    September 6, 2019 at 12:03 am

    Hi Swagatam,
    I am in need of some help.
    How would you build a circuit to have 3 three LEDs blink in sequence? Could you describe what the actual circuit layout would look like? I am using the NI Elvis Platform.
    Thank you,
    Sammy

    Reply
    • Swagatam says

      September 6, 2019 at 9:27 am

      Hi Sammy,

      By “blinking” do you mean the LEDs should “chase” or “run” in sequence?

      Reply
      • Sammy Schutz says

        September 6, 2019 at 4:52 pm

        I mean that as soon as one turns on it turns off and then the next light turns on and then off and so on. I’m not sure what the proper terminology for that is.

        Reply
        • Swagatam says

          September 7, 2019 at 1:40 pm

          OK you can try the first circuit from this post, with one modification.

          Disconnect IC 4017 IC pin15 from ground and connect it with its pin7

          https://www.homemade-circuits.com/knight-rider-led-chaser-circuit-mains/

          Reply

Need Help? Please Leave a Comment! We value your input—Kindly keep it relevant to the above topic! Cancel reply

Your email address will not be published. Required fields are marked *

Primary Sidebar

circuit simulator image

Subscribe to get New Circuits in your Email



Categories

  • Arduino Projects (89)
  • Audio and Amplifier Projects (132)
  • Automation Projects (17)
  • Automobile Electronics (101)
  • Battery Charger Circuits (83)
  • Datasheets and Components (105)
  • Electronics Theory (143)
  • Free Energy (37)
  • Games and Sports Projects (11)
  • Grid and 3-Phase (19)
  • Health related Projects (25)
  • Home Electrical Circuits (12)
  • Indicator Circuits (14)
  • Inverter Circuits (88)
  • Lamps and Lights (142)
  • Meters and Testers (69)
  • Mini Projects (46)
  • Motor Controller (64)
  • Oscillator Circuits (28)
  • Pets and Pests (15)
  • Power Supply Circuits (108)
  • Remote Control Circuits (50)
  • Security and Alarm (64)
  • Sensors and Detectors (102)
  • Solar Controller Circuits (59)
  • Temperature Controllers (42)
  • Timer and Delay Relay (49)
  • Transmitter Circuits (29)
  • Voltage Control and Protection (40)
  • Water Controller (36)



Other Links

  • Privacy Policy
  • Cookie Policy
  • Disclaimer
  • Copyright
  • Videos
  • Sitemap

People also Search

555 Circuits | 741 Circuits | LM324 Circuits | LM338 Circuits | 4017 Circuits | Ultrasonic Projects | SMPS Projects | Christmas Projects | MOSFETs | Radio Circuits | Laser Circuits | PIR Projects |



Social Profiles

  • Twitter
  • YouTube
  • Instagram
  • Pinterest
  • My Facebook-Page
  • Quora
  • Stack Exchange
  • Linkedin


  • Recent Comments

    • Swagatam on 9 Simple Solar Battery Charger Circuits
    • Swagatam on SMPS 2 x 50V 350W Circuit for Audio Power Amplifiers
    • Swagatam on SMPS 2 x 50V 350W Circuit for Audio Power Amplifiers
    • Carlos on 9 Simple Solar Battery Charger Circuits
    • Prasanna Jawalkar on SMPS 2 x 50V 350W Circuit for Audio Power Amplifiers

    © 2025 · Swagatam Innovations