If you’re looking for a more entry-level Arduino LED cube this 4x4x4 project is ... passing through NPN transistors). The Arduino Mega 2560 R3 is positioned on a suspended platform, with the ...

It’s a significant update. The Arduino UNO and Arduino Mega 2560 update the Duemilanove and Mega respectively. They now use an ATMega8U2 instead of an FTDI USB to serial converter chip.