So, I screwed up. I'm making a really neat infinity mirror (two way mirror facing a normal mirror with LED's in between), however, I just finished soldering the whole project together and tested it out... I soldered every single stinking LED in backwards. All the positive leads go to a common ground, and all the ground wires are separated in painstakingly detailed, numbered, wires. woops.
I could take the entire project apart and try again (sigh), but I was hoping there was a trick with the arduino sketch to set the pins as ground instead of changing the wiring of my project? Then all I have to do is swap the common ground to common power and have each one ground out in the series that I'm shooting for.
I didn't have any luck googling or searching the forums. Any advice (other than re-doing all those little tiny solder points)?
much appreciated, yes I'm a total noob and this is my first arduino/electronics project