Few days ago I’ve seen LoL (lots of LEDs) shield at Makershed it was cool, but the price almost killed me.
So I’ve decided to create my own LED shield for Arduino. I’ve used 35 Red LEDs which creates Matrix 7x5. Using Multiplexing all I needed was 7+5=12 digital pins to control 35 LEDs. At first I’ve drawn a circuit then made PCB and LED Shield was on the world. After everything was done I’ve realized that 1k resistors were limiting current so much that LED wasn’t shining bright enough so I will have to change value of the resistors. Here you can see video and some pictures later I will add a Tutorial and show you how can you use this Shield.