20 Random LED Patterns using Arduino

Project description:

In this project we will make take 12 LED’s and using them we will make 20 Led blinking pattern using Arduino board.

LED:

 Light-emitting diode (LED) is a two lead semiconductor light source that emit light when activated.

 LED consist of two leads:

• Cathode – negative
• Anode– positive

Component needed:

Arduino Uno x 1:

LED x 12:

Jumper wires:

Connections:

• Connect –VE terminal of all LED’s to GND PIN of Arduino
• Connect positive pin of LED 1 to PIN no 2 of Arduino
• Connect positive pin of LED 2 to PIN no 3 of Arduino
• Connect positive pin of LED 3 to PIN no 4 of Arduino
• Connect positive pin of LED 4 to PIN no 5 of Arduino
• Connect positive pin of LED 5 to PIN no 6 of Arduino
• Connect positive pin of LED 6 to PIN no 7 of Arduino
• Connect positive pin of LED 7 to PIN no 8 of Arduino
• Connect positive pin of LED 8 to PIN no 9 of Arduino
• Connect positive pin of LED 9 to PIN no 10 of Arduino
• Connect positive pin of LED 10 to PIN no 11 of Arduino
• Connect positive pin of LED 11 to PIN no 12 of Arduino

Uploading the code:

• Copy and paste the code below in Arduino and click upload

void setup()
 
{
 
for (int pin = 2; pin <= 12; pin++)
 
  {
 
    pinMode(pin,OUTPUT);
 
  }
 
}
 
//Main Loop - Switches different LED Patterns
 
void loop()
 
{
int pickme = random(1,20); // picks a random pattern of LED patterns
 
switch(pickme)
 
  {
 
  case 1:
 
    onrun(random(20,50));
 
  break;
 
  case 2:
 
    alternate(random(80,100));
 
  break;
 
  case 3:
 
    offrun(random(20,50));
 
  break;
 
  case 4:
 
    stack(random(30,50));
 
  break;
 
  case 5:
 
    chaser(random(80,100));
 
  break;
 
  case 6:
 
    fadealter(random(80,100));
 
  break;
 
  }
 
}
 
void clearall()
 
{
 
  for (int pin = 2; pin <= 19; pin++)
 
  {
 
  digitalWrite(pin,LOW);
 
  }
 
}
 
 
void fillall()
 
{
 
  for (int pin = 2; pin <= 19; pin++)
 
  {
 
  digitalWrite(pin, HIGH);
 
  }
 
}
 
 
//One ON LED Run and all other OFF
 
void onrun(int delaytime)
 
{
 
  for(int pin = 2; pin <= 19; pin++)
 
  {
 
  clearall();
 
  digitalWrite(pin, HIGH);
 
  delay(delaytime);
 
  }
 
  for(int pin = 18; pin >= 2; pin--)
 
  {
 
  clearall();
 
  digitalWrite(pin, HIGH);
 
  delay(delaytime);
 
  }
 
}
 
//One OFF LED Run and all other OFF
 
void offrun(int delaytime)
 
{
 
  for(int pin = 2; pin <= 19; pin++)
 
  {
 
  fillall();
 
  digitalWrite(pin, LOW);
 
  delay(delaytime);
 
  }
 
  for(int pin = 18; pin >= 2; pin--)
 
  {
 
  fillall();
 
  digitalWrite(pin, LOW);
 
  delay(delaytime);
 
  }
 
}
 
 
//Flashing all LEDs ON and OFF
 
void flash(int delaytime)
 
{
 
  for(int i = 1; i <=20; i++)
 
  {
 
  clearall();
 
  delay(delaytime);
 
  fillall();
 
  delay(delaytime);
 
  }
 
}
 
 
//Flashing LED in Fade manner
 
void fadeflash(int delaytime)
 
{
 
clearall();
 
int newdelay = delaytime / 5;
 
  for(int fade = 0; fade <= 255; fade += 5)
 
  {
 
    for(int pin = 2; pin <= 19; pin++)
 
    {
 
    analogWrite(pin, fade);
 
    }
 
  delay(newdelay);
 
  }
 
 
 
  for(int fade = 255; fade >= 0; fade -= 5)
 
  {
 
    for(int pin = 2; pin <= 19; pin++)
 
    {
 
    analogWrite(pin, fade);
 
    }
 
  delay(newdelay);
 
  }
 
}
 
//Alternatively Fade & Brightens
 
void fadealter(int delaytime)
 
{
 
clearall();
 
int newdelay = delaytime / 5;
 
  for(int fade = 0; fade <= 255; fade += 5)
 
  {
 
    for(int i = 2; i <= 18; i+=2)
 
    {
 
    analogWrite(i, fade);
 
    }
 
    for (int j = 3; j <= 19; j += 2)
 
    {
 
    analogWrite(j, 255-fade);
 
    }
 
  delay(newdelay);
 
  }
 
 
 
  for(int fade = 255; fade >= 0; fade -= 5)
 
  {
 
    for(int i = 2; i <= 18; i+=2)
 
    {
 
    analogWrite(i, fade);
 
    }
 
 
 
  for (int j = 3; j <= 19; j += 2)
 
  {
 
  analogWrite(j, 255-fade);
 
  }
 
  delay(newdelay);
 
  }
 
}
 
//Alternate Flash - Similar to Flash but alternate LEDs
 
void alternate(int delaytime)
 
{
 
  for (int n = 1; n <= 5; n++)
 
  {
 
  clearall();
 
  for (int i = 2; i <= 18; i += 2)
 
    {
 
    digitalWrite(i, HIGH);
 
    }
 
  delay(delaytime);
 
  clearall();
 
  for (int j = 3; j <= 19; j += 2)
 
    {
 
    digitalWrite(j, HIGH);
 
    }
 
  delay(delaytime);
 
  }
 
}
 
//Putting all LEDs one by one in a stack
 
void stack(int delaytime)
 
{
 
int stack = 0;
 
while(stack < 18)
 
  {
 
  for(int pos = 2; pos <= (19 - stack); pos++)
 
    {
 
    clearall();
 
    digitalWrite(pos, HIGH);
 
    drawstack(stack);
 
    delay(delaytime);
 
    }
 
  stack++;
 
  }
 
}
 
//Subfunction of the stack function
 
void drawstack(int stack)
 
{
 
  for(int n = 19; n > (19 - stack); n--)
 
    {
 
    if(n >= 2)
 
      {
 
      digitalWrite(n, HIGH);
 
      }
 
    }
 
}
 
 
//One LED chases another LED front and back
 
void chaser(int delaytime)
 
{
 
int div = 40;
 
int flashtime = delaytime / div;
 
int A = random(2,7);
 
int B = random(7,12);
 
int Av = 1;
 
int Bv = 1;
 
if(random(0,2))
 
{
 
Av *= -1;
 
}
 
if(random(0,2))
 
{
 
Bv *= -1;
 
}
 
for(int time = 1; time < 100; time++)
 
{
 
if(abs(A-B) == 1 && (Av*Bv) == -1)
 
{
 
for(int f = 1; f < round(div/4); f++)
 
{
 
clearall();
 
delay(flashtime);
 
digitalWrite(A, HIGH);
 
digitalWrite(B, HIGH);
 
delay(flashtime);
 
}
 
Av *= -1;
 
Bv *= -1;
 
A += Av;
 
B += Bv;
 
}
 
else
 
{
 
clearall();
 
digitalWrite(A, HIGH);
 
digitalWrite(B, HIGH);
 
A += Av;
 
B += Bv;
 
delay(delaytime);
 
}
 
if(A < 2)
 
{
 
A = 3;
 
Av *= -1;
 
}
 
if(B > 19)
 
{
 
B = 18;
 
Bv *= -1;
 
}
 
if(A >= B)
 
{
 
A = B-1;
 
}
 
}
 
}

 Conclusion:

You will see all the led patterns running randomly this is because we have implemented random function for pattern selection.

If you want to run a specific pattern remove the random function in the code and pass your own value in switch function accordingly.