Sorry for the late reply, you probably fixed this already. If you didn't and someone else is wondering: Yes you ABSOLUTELY need transistors, they are there to sink current from the other 16 pins.
Wow, that sounds like one hell of a job!!
The "copy to clipboard" button is merely a easy way to copy the whole text to your clipboard. If it somehow doesn't work you should be able to just mark the text like anywhere else and copy it and then paste it into the arduino program!
It sounds to me like you have a wiring problem, did you connect it all correctly to the arduino? I know you said you did, but you should go over it again. Check that you started with the correct wiring and that you didn't confuse A0 - A5, that's easy to do.
The Arduino nano seems to have 22 pins instead of the uno's 20 pins so it should work fine. https://www.arduino.cc/en/Main/ArduinoBoardNanoTry to connect it almost the same but just define the I/O pins differently: http://statusorel.ru/technology/grbl-pinout-arduino-nano-v3-0.html
If the anodes go vertical and the cathodes horisontal as it seems like this will work great!
Hi! This seems to be exactly the same way that I build mine so it should work fine!
Hi!I made this in visual studio written in C#. I guess I can share the code if you want it!
LED Cube 8x8x8
Building your own CNC router/milling machine