Shift Registers vs LED Drivers?
I am trying to figure out how to program an arduino to control LEDs. Basically, what I have done, is I have made a 3x3 matrix and can program some simple sequences with the LEDs using the digitalWrite and delay functions. I'm not even sure that this is the right way to do this, I don't think it is, but it works. Anyway I want to try to program bigger matrices and maybe LED cubes using my arduino, but without using up all of the output pins. So, I've came across two ways to get more outputs from less pins; LED drivers and shift registers. These may be the same thing and I'm just not aware. But anyway, is there a difference between them? I've really only found information about shift registers, nothing really about LED drivers. Is one easier to program? Does one use less pins than the other? Or are they just the same thing?