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[Reply #15 on:]

The resistor limits the current which might go in and out of whatever is driving the base of the transistor,
such as an arduino pin.

[Reply #16 on:]

Is it possible for somebody to explain me why I need to use a resistor on the base from the transistor? I did alot of reading about why a resistor is needed on the base from the transistor (as NPN switch), but I keep seeing different answer on different forums this makes me understand it less and less. So if someone briefly can explain why a resistor is needed on the base (and how you calculate it) I would be very happy with it !

sorry for the newbie questions, still in the learning process  

It's because once the voltage applied across the emitter/base junction of a transistor is higher then the forward voltage drop rating for that base/emitter junction it will fully turn on and act like a short circuit drawing current well in excess of it's maximum base current limit (and the maximum output current being drawn from say an arduino output pin when set high that one might wire to the base terminal), so something in the base circuit needs to limit the base current to at or below it's maximum rated current value, and a resistor wired in series with the base terminal just happens to be the simplest way to do that.

Lefty

[Reply #17 on:]

Thanks for the explanations, now I understand why I needed it.

I got another question about the 13th pin from arduino. According to arduino pin 13th has an built in resistor so I can directly put a LED to pin 13 and ground. When I connect a column on pin 13 does the LEDs shine less bright because there is an extra resistor built in on pin 13(my 220ohm resistor + arduino uno pin 13th resistor?)

[Reply #18 on:]

Thanks for the explanations, now I understand why I needed it.

I got another question about the 13th pin from arduino. According to arduino pin 13th has an built in resistor so I can directly put a LED to pin 13 and ground. When I connect a column on pin 13 does the LEDs shine less bright because there is an extra resistor built in on pin 13(my 220ohm resistor + arduino uno pin 13th resistor?)

There is a series resistor/led wired to pin 13 mounted on most arduino boards. However the shield pin 13 is wired directly to the AVR pin so the pin is not protected by the on board resistor, so all the same current rules apply to using pin 13 as with any other AVR I/O pin.

Lefty

[Reply #19 on:]

All the components are send today! Soon I will start building the cube .

A little programming question. What will happen when I don't use a delay between switching on and off the LED. I would guess it wouldnt turn on the LED because it's been turned on and off too fast. Will I do damage on any components if I don't use delay.

And it's true the arduino pin can take up to 200mA? So I will be able to put on 9 LEDs on 1 plane ( 9 * ~15mA= 135mA). Thanks for the help again .

[Reply #20 on:]

Got my LED cube build today ! This code I made as a test:

I used for() loops as delay between the columns as well for making the led columns run at their full brightness.

Code:

int layer1 = 11;
int layer2 = 12;
int layer3 = 13;
int led1   = 10;
int led2   = 9;
int led3   = 8;
int led4   = 7;
int led5   = 6;
int led6   = 5;
int led7   = 4;
int led8   = 3;
int led9   = 2;
int r      = 1;




void setup()
{
  pinMode(layer1, OUTPUT);
  pinMode(layer2, OUTPUT);   
  pinMode(layer3, OUTPUT); 
  pinMode(led1,   OUTPUT);
  pinMode(led2,   OUTPUT); 
  pinMode(led3,   OUTPUT); 
  pinMode(led4,   OUTPUT); 
  pinMode(led5,   OUTPUT); 
  pinMode(led6,   OUTPUT); 
  pinMode(led7,   OUTPUT); 
  pinMode(led8,   OUTPUT); 
  pinMode(led9,   OUTPUT); 
 

}

void loop()
{
while(r<=5){
  digitalWrite (layer1, LOW);
  digitalWrite (layer2, LOW);
  digitalWrite (layer3, LOW);
  digitalWrite (led5, HIGH);
 
 for(int i = 0; i <= 15;i++){
  digitalWrite (layer1, HIGH);
  digitalWrite (led1, HIGH);
  delay(1);
  digitalWrite (layer1, LOW);
  digitalWrite (layer2, HIGH);
  delay(1);
  digitalWrite (layer2, LOW);
  digitalWrite (layer3, HIGH);
  delay(1);
  digitalWrite (layer3, LOW);
  digitalWrite (led1, LOW);
 }
 
 for(int i = 0; i <= 15;i++){
  digitalWrite (layer1, HIGH);
  digitalWrite (led2, HIGH);
  delay(1);
  digitalWrite (layer1, LOW);
  digitalWrite (layer2, HIGH);
  delay(1);
  digitalWrite (layer2, LOW);
  digitalWrite (layer3, HIGH);
  delay(1);
  digitalWrite (layer3, LOW);
  digitalWrite (led2, LOW);
 }
 
for(int i = 0; i <= 15;i++){
  digitalWrite (layer1, HIGH);
  digitalWrite (led3, HIGH);
  delay(1);
  digitalWrite (layer1, LOW);
  digitalWrite (layer2, HIGH);
  delay(1);
  digitalWrite (layer2, LOW);
  digitalWrite (layer3, HIGH);
  delay(1);
  digitalWrite (layer3, LOW);
  digitalWrite (led3, LOW);
 }
 
 for(int i = 0; i <= 15;i++){
  digitalWrite (layer1, HIGH);
  digitalWrite (led6, HIGH);
  delay(1);
  digitalWrite (layer1, LOW);
  digitalWrite (layer2, HIGH);
  delay(1);
  digitalWrite (layer2, LOW);
  digitalWrite (layer3, HIGH);
  delay(1);
  digitalWrite (layer3, LOW);
  digitalWrite (led6, LOW);
 }
 
 for(int i = 0; i <= 15;i++){
  digitalWrite (layer1, HIGH);
  digitalWrite (led9, HIGH);
  delay(1);
  digitalWrite (layer1, LOW);
  digitalWrite (layer2, HIGH);
  delay(1);
  digitalWrite (layer2, LOW);
  digitalWrite (layer3, HIGH);
  delay(1);
  digitalWrite (layer3, LOW);
  digitalWrite (led9, LOW);
 }
 
 for(int i = 0; i <= 15;i++){
  digitalWrite (layer1, HIGH);
  digitalWrite (led8, HIGH);
  delay(1);
  digitalWrite (layer1, LOW);
  digitalWrite (layer2, HIGH);
  delay(1);
  digitalWrite (layer2, LOW);
  digitalWrite (layer3, HIGH);
  delay(1);
  digitalWrite (layer3, LOW);
  digitalWrite (led8, LOW);
 }
 
 for(int i = 0; i <= 15;i++){
  digitalWrite (layer1,  HIGH);
  digitalWrite (led7,    HIGH);
  delay(1);
  digitalWrite (layer1, LOW);
  digitalWrite (layer2, HIGH);
  delay(1);
  digitalWrite (layer2, LOW);
  digitalWrite (layer3, HIGH);
  delay(1);
  digitalWrite (layer3, LOW);
  digitalWrite (led7, LOW);
 }
 for(int i = 0; i <= 15;i++){
  digitalWrite (layer1, HIGH);
  digitalWrite (led4, HIGH);
  delay(1);
  digitalWrite (layer1, LOW);
  digitalWrite (layer2, HIGH);
  delay(1);
  digitalWrite (layer2, LOW);
  digitalWrite (layer3, HIGH);
  delay(1);
  digitalWrite (layer3, LOW);
  digitalWrite (led4, LOW);
 }
 digitalWrite (led5, LOW);
 digitalWrite (layer1, LOW);
 digitalWrite (layer2, LOW);
 digitalWrite (layer3, LOW); // RESET all layers to OFF
 r = r++;                     
}
r = 1;                       
while (r<=10){
  digitalWrite (layer1, HIGH);
  digitalWrite (led1, HIGH);
  digitalWrite (led3, HIGH);
  digitalWrite (led7, HIGH);
  digitalWrite (led9, HIGH);
  delay(75);
  digitalWrite (layer1, LOW);
  digitalWrite (layer2, HIGH);
  delay(75);
  digitalWrite (layer2, LOW);
  digitalWrite (layer3, HIGH);
  delay(75);
  digitalWrite (led1, LOW);
  digitalWrite (led3, LOW);
  digitalWrite (led7, LOW);
  digitalWrite (led9, LOW);
  delay(75);
  digitalWrite (led2, HIGH);
  digitalWrite (led4, HIGH);
  digitalWrite (led6, HIGH);
  digitalWrite (led8, HIGH);
  delay(75);
  digitalWrite (layer3, LOW);
  digitalWrite (layer2, HIGH);
  delay(75);
  digitalWrite (layer2, LOW);
  digitalWrite (layer1, HIGH);
  delay(75);
  digitalWrite (led2, LOW);
  digitalWrite (led4, LOW);
  digitalWrite (led6, LOW);
  digitalWrite (led8, LOW);
  r = r++;
}
r=1;
}

Here a video :
If anyone has some tips what I could do better on my code, feel free to let me know .

[Reply #21 on:]

Yay, working cube!

[Reply #22 on:]

Another video , multiplexed so only 1 layer is lit on any given time(im using array's and for loops to turn on the LEDs, easier to program/the code is shorter):


edit:
this code has even less lines as the one that I showed 2 posts back .

[Reply #23 on:]

Neat! Nice work. Would you mind posting the new code as a reference?  Definitely think it would be helpful for me as jump into the programming of my cube.  Thanks.

[Reply #24 on:]

Yep no problem(this code is a little different than showed in the video):

Code:

/* 3x3x3 LED cube
 * ------------
 * Created January 2013
 * http://arduino.cc/forum/index.php/topic,144057.0.html
 * Made by M.Neuhaus
 */
 
int lvlPins[3] = {11,12,13};
int ledPins[9] = {10,9,8,7,6,5,4,3,2};
int repeat_value = 0;
int speed_value;    //Used in a double while loop
int randomledPins;
int randomlvlPins;

void setup()
{
  for(int i=0; i<3; i++){
    pinMode(lvlPins[i], OUTPUT);
  }
  for(int i=0; i<9; i++){
    pinMode(ledPins[i], OUTPUT);
  }
}
void loop(){
  repeat_value = 0;
  speed_value = 50;
  while(speed_value > 1){ 
    while(repeat_value < speed_value){
        for(int i=0; i<3; i++){digitalWrite(ledPins[i], HIGH);}
        for(int i=0; i<3; i++){digitalWrite(lvlPins[i], HIGH); delay(1); digitalWrite(lvlPins[i], LOW);}
        for(int i=0; i<3; i++){digitalWrite(ledPins[i], LOW);}
        repeat_value+=1;  //wall 0,1,2
    }                                                                                         
    repeat_value = 0;       
    while(repeat_value < speed_value){
        for(int i=0; i<3; i++){digitalWrite(ledPins[i+2+i*2], HIGH);}
        for(int i=0; i<3; i++){digitalWrite(lvlPins[i], HIGH); delay(1); digitalWrite(lvlPins[i], LOW);}
        for(int i=0; i<3; i++){digitalWrite(ledPins[i+2+i*2], LOW);}
        repeat_value+=1;  //wall 2,5,8
    } 
    repeat_value = 0; 
    while(repeat_value < speed_value){
        for(int i=0; i<3; i++){digitalWrite(ledPins[i+6], HIGH);}
        for(int i=0; i<3; i++){digitalWrite(lvlPins[i], HIGH); delay(1); digitalWrite(lvlPins[i], LOW);}
        for(int i=0; i<3; i++){digitalWrite(ledPins[i+6], LOW);}
        repeat_value+=1;  //wall 6,7,8
    } 
    repeat_value = 0; 
    while(repeat_value < speed_value){
        for(int i=0; i<3; i++){digitalWrite(ledPins[i+i*2], HIGH);}
        for(int i=0; i<3; i++){digitalWrite(lvlPins[i], HIGH); delay(1); digitalWrite(lvlPins[i], LOW);}
        for(int i=0; i<3; i++){digitalWrite(ledPins[i+i*2], LOW);}
        repeat_value+=1;  //wall 0,3,6
    }     
    repeat_value = 0;
    speed_value-=5;       //acceleration
  }       
  while(repeat_value<200){
    digitalWrite(lvlPins[0], HIGH);
    digitalWrite(ledPins[4], HIGH);
    delay(1);
    digitalWrite(lvlPins[0], LOW);
    digitalWrite(lvlPins[1], HIGH);
    for(int i=0; i<3; i++){digitalWrite(ledPins[i+3], HIGH); digitalWrite(ledPins[1], HIGH); digitalWrite(ledPins[7], HIGH);}
    delay(1);
    digitalWrite(lvlPins[1], LOW);
    for(int i=0; i<3; i++){digitalWrite(ledPins[i+3], LOW); digitalWrite(ledPins[1], LOW); digitalWrite(ledPins[7], LOW);}
    digitalWrite(lvlPins[2], HIGH);
    digitalWrite(ledPins[4], HIGH);
    delay(1);
    digitalWrite(lvlPins[2], LOW);
    digitalWrite(ledPins[4], LOW);
    repeat_value+=1;      //Orb
  }
  repeat_value=0;
  while(repeat_value<500){
    for(int i=0; i<5; i++){digitalWrite(ledPins[i+i], HIGH);}
    for(int i=0; i<1; i++){digitalWrite(lvlPins[i+1], HIGH); delay(1); digitalWrite(lvlPins[i+1], LOW);}
    repeat_value+=1;   //Orb expands to 4 corners of cube
  }
  repeat_value = 0;
  while(repeat_value<400){
    for(int i=0; i<5; i++){digitalWrite(ledPins[i+i], HIGH);}
    for(int i=0; i<3; i++){digitalWrite(lvlPins[i], HIGH); delay(1); digitalWrite(lvlPins[i], LOW);}
    for(int i=0; i<5; i++){digitalWrite(ledPins[i+i], LOW);}
    if(repeat_value>200){
      for(int i=0; i<4; i++){digitalWrite(ledPins[2*i+1], HIGH);}  //Led 1,3,5,7 ON
      for(int i=0; i<1; i++){digitalWrite(lvlPins[i], HIGH); delay(1); digitalWrite(lvlPins[i], LOW);}
      if(repeat_value>250){
        for(int i=0; i<1; i++){digitalWrite(lvlPins[i+1], HIGH); delay(1); digitalWrite(lvlPins[i+1], LOW);}
      }
      if(repeat_value>300){
        for(int i=0; i<1; i++){digitalWrite(lvlPins[i+2], HIGH); delay(1); digitalWrite(lvlPins[i+2], LOW);}
      }
      for(int i=0; i<4; i++){digitalWrite(ledPins[2*i+1], LOW);}
    }           
    repeat_value+=1;
  }
  repeat_value=0;
  for(int i=0; i<9; i++){digitalWrite(ledPins[i], HIGH);}
  while(repeat_value<200){
    for(int i=0; i<2; i++){digitalWrite(lvlPins[i], HIGH); delay(1); digitalWrite(lvlPins[i], LOW);} 
    repeat_value+=1;   // Only layer 1, 2 ON
  }
  repeat_value=0;
  while(repeat_value<150){
    for(int i=0; i<1; i++){digitalWrite(lvlPins[i], HIGH); delay(1); digitalWrite(lvlPins[i], LOW);} 
    repeat_value+=1;   //Only layer 1 ON
  }
  for(int i=0; i<9; i++){digitalWrite(ledPins[i], LOW);}
  repeat_value=0;
  while(repeat_value<60){
    randomledPins=random(9);
    randomlvlPins=random(3);
    digitalWrite(ledPins[randomledPins], HIGH);
    digitalWrite(lvlPins[randomlvlPins], HIGH);
    delay(50);
    digitalWrite(ledPins[randomledPins], LOW);
    digitalWrite(lvlPins[randomlvlPins], LOW);
    repeat_value+=1;
  }
  repeat_value = 0;
  speed_value = 0; 
  while(repeat_value<5){
    while(speed_value<30){    //Use of 'speed_value' due double while loop
      for(int i=0; i<3; i++){digitalWrite(ledPins[3*i+1], HIGH);}
      for(int i=0; i<3; i++){digitalWrite(lvlPins[i], HIGH); delay(1); digitalWrite(lvlPins[i], LOW);}
      for(int i=0; i<3; i++){digitalWrite(ledPins[3*i+1], LOW);}
      speed_value+=1;
    }
    speed_value = 0;
    while(speed_value<30){
      for(int i=0; i<3; i++){digitalWrite(ledPins[3*i+2], HIGH);}
      for(int i=0; i<1; i++){digitalWrite(lvlPins[i+2], HIGH); delay(1); digitalWrite(lvlPins[i+2], LOW);}
      for(int i=0; i<3; i++){digitalWrite(ledPins[3*i+2], LOW);}
      for(int i=0; i<3; i++){digitalWrite(ledPins[3*i+1], HIGH);}
      for(int i=0; i<1; i++){digitalWrite(lvlPins[i+1], HIGH); delay(1); digitalWrite(lvlPins[i+1], LOW);}
      for(int i=0; i<3; i++){digitalWrite(ledPins[3*i+1], LOW);}
      for(int i=0; i<3; i++){digitalWrite(ledPins[3*i], HIGH);}
      for(int i=0; i<1; i++){digitalWrite(lvlPins[i], HIGH); delay(1); digitalWrite(lvlPins[i], LOW);}
      for(int i=0; i<3; i++){digitalWrite(ledPins[3*i], LOW);}
      speed_value+=1;
    }
    speed_value = 0;
    while(speed_value<90){
      for(int i=0; i<9; i++){digitalWrite(ledPins[i], HIGH);}
      for(int i=0; i<1; i++){digitalWrite(lvlPins[i+1], HIGH); delay(1); digitalWrite(lvlPins[i+1], LOW);}
      for(int i=0; i<9; i++){digitalWrite(ledPins[i], LOW);}
      speed_value+=1;
    }
    speed_value = 0;
    while(speed_value<30){
      for(int i=0; i<3; i++){digitalWrite(ledPins[3*i], HIGH);}
      for(int i=0; i<1; i++){digitalWrite(lvlPins[i+2], HIGH); delay(1); digitalWrite(lvlPins[i+2], LOW);}
      for(int i=0; i<3; i++){digitalWrite(ledPins[3*i], LOW);}
      for(int i=0; i<3; i++){digitalWrite(ledPins[3*i+1], HIGH);}
      for(int i=0; i<1; i++){digitalWrite(lvlPins[i+1], HIGH); delay(1); digitalWrite(lvlPins[i+1], LOW);}
      for(int i=0; i<3; i++){digitalWrite(ledPins[3*i+1], LOW);}
      for(int i=0; i<3; i++){digitalWrite(ledPins[3*i+2], HIGH);}
      for(int i=0; i<1; i++){digitalWrite(lvlPins[i], HIGH); delay(1); digitalWrite(lvlPins[i], LOW);}
      for(int i=0; i<3; i++){digitalWrite(ledPins[3*i+2], LOW);}
      speed_value+=1;
    }
  repeat_value+=1;
  speed_value = 0;
  }
} 

[Reply #25 on:]

Thanks for sharing that code Arduino001 ... I like your work, well done   It always amazes me that you people that classify themselves as Newbies come up with such great code....   I collect any 3 x 3 cube code that I find because it helps me to learn about how to code, so yours will certainly be going into my collection. In case you're interested here is one I did and also a link to some excellent code that uses PROGMEM

http://www.instructables.com/id/The-Arduino-LED-Cube/step5/Programming-Time/

Code:

/* Code by Pedro147 inspired by this -
 
 http://www.abrushfx.com/Arduino/ledcube3.html
 
*/

int ledRow[] = { 11, 12, 13 };
int ledCol[]= {  2, 3, 4, 5, 6, 7, 8, 9, 10 };
int timer= 10;




void setup()
{  
  for( int i =  0; i < 3; i++)

  {
    pinMode( ledRow[i],OUTPUT);
  }

  {  
    for(int j =  0; j < 9; j++)

    {
      pinMode( ledCol[j],OUTPUT);
    }
  }
}


void onLED(int ledRow, int ledCol){

  digitalWrite(ledRow, HIGH);
  digitalWrite(ledCol, HIGH);

}


void offLED(int ledRow, int ledCol)
{
  digitalWrite(ledRow, LOW);
  digitalWrite(ledCol, LOW);
}


void allOff()
{
  for(int i = 3; i--;)
  {
    for(int j = 9; j--;)
    {
      offLED(ledRow[i],ledCol[j]);
    }
  }
}


void oneToNine_ColsOn()
{
  for(int j = 9; j--;)

  {
    for(int i = 3; i--;)
    {
      digitalWrite(ledRow[i], HIGH);
      delay(10);
      digitalWrite(ledCol[j], HIGH);
    }
  }
}


void everySecond_ColsOn1()
{

  for(int j = 0; j< 9; j+=2)
  {
    for(int i = 3; i--;)
    {
      digitalWrite(ledRow[i], HIGH);
      delay(10);
      digitalWrite(ledCol[j], HIGH);
    }
  }
}


void everySecond_ColsOn_2()
{

  for(int j = 1; j< 9; j+=2)
  {
    for(int i = 3; i--;)
    {
      digitalWrite(ledRow[i], HIGH);
      delay(10);
      digitalWrite(ledCol[j], HIGH);
    }
  }
}
void lhWall_fToR()

{

  for(int j = 0; j< 9; j+=3)
  {
    for(int i = 3; i--;)
    {
      digitalWrite(ledRow[i], HIGH);
      delay(10);
      digitalWrite(ledCol[j], HIGH);
    }
  }
}

void rhWall_fToR()

{

  for(int j = 2; j< 9; j+=3)
  {
    for(int i = 3; i--;)
    {
      digitalWrite(ledRow[i], HIGH);
      delay(10);
      digitalWrite(ledCol[j], HIGH);
    }
  }
}


void frontWall_LtoR()
{
  for(int j = 0; j< 3; j++)
  {
    for(int i = 3; i--;)
    {
      digitalWrite(ledRow[i], HIGH);
      delay(10);
      digitalWrite(ledCol[j], HIGH);
    }
  }
}

void rearWall_LtoR()
{
  for(int j = 6; j<9; j++)
  {
    for(int i = 3; i--;)
    {
      digitalWrite(ledRow[i], HIGH);
      delay(10);
      digitalWrite(ledCol[j], HIGH);
    }
  }
}


void centreWall_LtoR()
{
  for(int j = 3; j<6; j++)
  {
    for(int i = 3; i--;)
    {
      digitalWrite(ledRow[i], HIGH);
      delay(timer);
      digitalWrite(ledCol[j], HIGH);
    }
  }
}

void centreWall_fToR()

{

  for(int j = 1; j< 9; j+=3)
  {
    for(int i = 3; i--;)
    {
      digitalWrite(ledRow[i], HIGH);
      delay(timer);
      digitalWrite(ledCol[j], HIGH);
    }
  }
}

void diagWall_LtoR()
{
  for(int j = 0; j < 9; j+=4)
  {
    for(int i = 3; i--;)
    {
      digitalWrite(ledRow[i], HIGH);
      delay(timer);
      digitalWrite(ledCol[j], HIGH);
    }
  }
}

void diagWall_RtoL()
{
  for(int j = 2; j < 8; j+=2)
  {
    for(int i = 3; i--;)
    {
      digitalWrite(ledRow[i], HIGH);
      delay(timer);
      digitalWrite(ledCol[j], HIGH);
    }
  }
}

void rowPaneFigure8()
{
  for (int i = 0; i < 3; i++)

  {
    for(int j = 0; j < 3; j++)   // light LED's 1 - 3 on/off on top level

    {
      onLED(ledRow[i],ledCol[j]);         // 7 8 9
      delay(timer);                       // 4 5 6
      offLED(ledRow[i],ledCol[j]);        // 1 2 3
    }
    for(int j = 5; j > 2; j--)  // light LED's 6 - 4 on/off on top level
    {
      onLED(ledRow[i],ledCol[j]);
      delay(timer);
      offLED(ledRow[i],ledCol[j]);
    }
    for(int j = 6; j < 9; j++)  // light LED's 7 - 9 on/off on top level
    {
      onLED(ledRow[i],ledCol[j]);
      delay(timer);
      offLED(ledRow[i],ledCol[j]);
    }
    for(int j = 5; j > 2; j--)   // light LED's 6 - 4 on/off on top level
    {
      onLED(ledRow[i],ledCol[j]);
      delay(timer);
      offLED(ledRow[i],ledCol[j]);
    }

  }

}

void frontTorear_flash1()
{
  for(int j = 0; j < 9; j+=3)
    for(int i = 3; i--;)
    {
      digitalWrite(ledRow[i], HIGH);
      delay(20);
      digitalWrite(ledCol[j], HIGH);
    }
}


void frontTorear_flash2()
{
  for(int j = 1; j < 9; j+=3)
    for(int i = 3; i--;)
    {
      digitalWrite(ledRow[i], HIGH);
      delay(20);
      digitalWrite(ledCol[j], HIGH);
    }
}


void frontTorear_flash3()
{
  for(int j = 2; j < 9; j+=3)
    for(int i = 3; i--;)
    {
      digitalWrite(ledRow[i], HIGH);
      delay(20);
      digitalWrite(ledCol[j], HIGH);
    }
}

void randomColumnsOnOff()
{
  int colmax = 9;
  int stCol  = random(0,colmax);

  {
    digitalWrite(ledRow[0], HIGH);
    digitalWrite(ledCol[stCol], HIGH);
    digitalWrite(ledRow[1], HIGH);
    digitalWrite(ledCol[stCol], HIGH);
    digitalWrite(ledRow[2], HIGH);
    digitalWrite(ledCol[stCol], HIGH);
    delay(timer);
    allOff();



  }
}
void loop()
{
  oneToNine_ColsOn();
  delay(10);
  allOff();
  delay(10);
  everySecond_ColsOn1();
  delay(10);
  allOff();
  delay(10);
  everySecond_ColsOn_2();
  delay(10);

  oneToNine_ColsOn();
  delay(10);
  allOff();
  delay(10);
  everySecond_ColsOn1();
  delay(10);
  allOff();
  delay(10);
  everySecond_ColsOn_2();
  delay(10);


  lhWall_fToR();
  delay(100);
  allOff();
  centreWall_fToR();
  delay(100);
  allOff();
  rhWall_fToR();
  delay(100);
  allOff();

  frontWall_LtoR();
  delay(100);
  allOff();
  centreWall_LtoR();
  delay(100);
  allOff();
  rearWall_LtoR();
  delay(100);
  allOff();

  rowPaneFigure8();

  centreWall_LtoR();
  allOff();
  diagWall_LtoR();
  allOff();
  centreWall_fToR();
  allOff();
  diagWall_RtoL();
  allOff();
  frontTorear_flash1();
  delay (timer);
  allOff();
  frontTorear_flash2();
  delay (timer);
  allOff();
  frontTorear_flash3();
  delay (timer);
  allOff();
  randomColumnsOnOff();
  randomColumnsOnOff();
  randomColumnsOnOff();
}

[Reply #26 on:]

Don't know how, but Arduino001 should be me (WonderTiger),  Weird..... Thanks anyway for your positive reply ! (and thanks ofcourse for sharing your code as well )

[Reply #27 on:]

WonderTiger today the cache has been playing some bad pranks to a few people.
monday we'll have a look at it and fix it.

m

[Reply #28 on:]

My apologies WonderTiger. I just looked at the name of the person that posted the code without realising that this was not the OP... opps  

p.s - that damn cache is responsible for a lot of misunderstandings on the web

[Reply #29 on:]

No problem, I just thought it was weird because I was sure I made the post  . Anyway, my next project will be 5x5x5. I already ordered some shift register to experiment with and learn the basics of them , I probably going to use shift registers on my 3x3x3 cube first to make sure I understand the programming and the way the shift registers work.