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You are here: Home » Arduino LED Light Chaser : 10+ LED Code & Circuit

By Abhishek Ghosh November 5, 2015 11:45 pm Updated on November 5, 2015

Arduino LED Light Chaser : 10+ LED Code & Circuit

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LED Light Chaser Mimics as Progressing Point of Light. Here is Arduino LED Light Chaser Guide For 10+ LED With Code, Circuit and Video Demo. We have another LED Light related Arduino guide – Christmas Light. We are assuming that the reader has basic Electronics components kit. We need some jumper wire, resisters, LED, Breadboard and obviously an Arduino board. Skill of wiring work is more important than real electronics for this project.

 

Arduino LED Light Chaser : Modification Ideas of Basic Example

 

  1. If you add the LEDs in a circular manner, it actually looks great.
  2. If one Pin is shared by two LEDs on a symmetrically arranged design where the LEDs will sit – it create convergence feel.
  3. Maximum number of LEDs can be used becoming 14 using the Digital Pins. If you share on Pin for 2 or more times, number actually increases.
  4. It is practical to use 1.8V bulb instead of LED for decoration purpose – we have guide on how to use 1.8V bulb with Arduino without using relay.

Here is a video, it is not of great quality but serve the purpose :

 

Arduino LED Light Chaser : 10+ LED Code & Circuit

 

There are many ways we can make the “chasing effect”. Circuit is very easy. Practically blink like connection to all the LEDs. We have the full code and circuit on Fritzing, yet here is a good kind of infographics :

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Arduino-LED-Light-Chaser---10+-LED-Code-&-Circuit

Easiest code is this :

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const int number = 11;
const byte order [number] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
void setup() {                
  for (byte i = 0; i < number; i++)  
    pinMode(order [i], OUTPUT);
}  
void repeat (const unsigned long delaytime)
  {
  for (byte i = 0; i < number; i++)
    {
    byte pin = order [i];
    digitalWrite(pin, HIGH);
    delay(delaytime);              
    digitalWrite(pin, LOW);
    }
  }
void loop()
  {
  for (unsigned long n = 500; n > 0; n -= 100)
    repeat (n);
  }

You can modify the values at :

for (unsigned long n = 500; n > 0; n -= 100) : change 500 and 100 to lower for faster effect. Change one by one to see the “rebound” effect.

number, order, delaytime repeat are my own words.

const int number = 10; : Total number of functional LED.
const byte order [number] = { 1, ... 10 }; : Order of lighting up. We can light up number one, then number 9, then number 2 for our custom desired effect. Here is the Github gist of the code.

However, we suggest to use this code :

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volatile byte wantedPin;   // which pin to pulse on and off
 
const byte PWMiterations = 40;
const byte PWMdutyCycle = 2;   // <-- should be less than PWMiterations
 
volatile byte pwmCount;
 
ISR(TIMER1_COMPA_vect)
{
 
  // if in "on" cycle turn the LED on
if (pwmCount > PWMdutyCycle)
   digitalWrite(wantedPin, LOW);      
else
   digitalWrite(wantedPin, HIGH);      
  
if (++pwmCount >= PWMiterations)
  pwmCount = 0;
}  // end of TIMER1_COMPA_vect
 
const int numberOfLEDs = 11;
 
const byte LEDorder [numberOfLEDs] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
 
void setup()
{                
for (byte i = 0; i < numberOfLEDs; i++)  
   pinMode(LEDorder [i], OUTPUT);
  
// set up Timer 1
TCCR1A = 0;          // normal operation
TCNT1 = 0;           // make sure we start at zero
TCCR1B = _BV(WGM12) | _BV(CS10) | _BV (CS12);   // CTC, scale to clock / 1024
OCR1A =  5;       // compare A register value (1000 * clock speed / 1024)
TIMSK1 = _BV (OCIE1A);             // interrupt on Compare A Match
  
}  // end of setup
 
void doCircle (const unsigned long delayAmount)
{
for (byte i = 0; i < numberOfLEDs; i++)
   {
   noInterrupts ();
   byte pin = LEDorder [i];
   wantedPin = pin;
   pwmCount = 0;
   interrupts ();
   delay(delayAmount);              
   digitalWrite(pin, LOW);
   }   // end of for
}  // end of doCircle
void loop()
{
for (unsigned long n = 500; n > 0; n -= 100)
   doCircle (n);
} // end of loop

for (unsigned long n = 500; n > 0; n -= 100) : change 500 and 100 to lower for faster effect. Change one by one to see the “rebound” effect.

Above code is written by Nick Gammon and we included on Fritzing project, also as gist. Arduino officially create the effect in different way of coding.

Tagged With arduino led chase effect code , arduino 10 led chaser code , arduino led chaser , ARDUINO LIGHT CHASE , arduino chaser , arduino led circuit code , arduino light chaser code , arduino chasing lights , arduino light chaser , arduino led chaser code

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Abhishek Ghosh

About Abhishek Ghosh

Abhishek Ghosh is a Businessman, Surgeon, Author and Blogger. You can keep touch with him on Twitter - @AbhishekCTRL.

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About This Article

Cite this article as: Abhishek Ghosh, "Arduino LED Light Chaser : 10+ LED Code & Circuit," in The Customize Windows, November 5, 2015, January 31, 2023, https://thecustomizewindows.com/2015/11/arduino-led-light-chaser-10-led-code-circuit/.

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