Help: Row Scanning Multiplexing RGB Led

Projects Programming
1

Hi,

I am trying to make a some patterns which run on 6 RGB Leds (Common Anode). I uploaded the circuit diagram. I have also written code but it is not a worth it. I need help on creating some patterns like 6 Leds get on with red colour then change into green and finally blue color with some interval.

please guide me, how to make code efficient and optimized.

In diagram 4 transistors are used but now i am using 3 transistors (only 6 Leds)

const int row[4] = {12,8,7};   // Arduino row pins
const int column[6] = {11,10,9,6,5,3};   // Arduino column pins


void setup() 
{
for (int i = 0;i<3; i++)
  {
    pinMode(row[i], OUTPUT);
    digitalWrite(row[i],HIGH);
  }  
for (int j = 0;j<6; j++)
  {
    pinMode(column[j], OUTPUT);
    digitalWrite(column[j], HIGH);
  }
}
void loop() {
  
analogWrite(11,255);
analogWrite(10,0);
analogWrite(9,255);

digitalWrite(12,LOW);
digitalWrite(12,HIGH);

digitalWrite(8,LOW);
digitalWrite(8,HIGH);
digitalWrite(7,LOW);
digitalWrite(7,HIGH);
}

Thanks is advance.

RGB Schematic.png
RGB Schematic.png3031×2131 29.6 KB

2 
digitalWrite(12,LOW);
digitalWrite(12,HIGH);

digitalWrite(8,LOW);
digitalWrite(8,HIGH);
digitalWrite(7,LOW);
digitalWrite(7,HIGH);

That section of code executes so fast that it will look like nothing is happening. Insert delay()s between the digitalWrite highs and digitalWrite lows.

Better yet learn to use millis() (and micros()) for timing. A beginner's guide to millis().