This part number (and ofcourse the LED type) is not very critical. If you want to use a bi-polar transistor, don’t forget to add a resistor (~1KΩ ) between Arduino D10 and the base terminal of the ...

To the human eye, it looks like multiple LED’s are lit up simultaneously. [Alex] planned to use an Arduino to control ... the signals through a set of PNP transistors to flip the logic.

If you’re looking for a more entry-level Arduino LED cube this 4x4x4 project is ... below – bottom right – shown passing through NPN transistors). The Arduino Mega 2560 R3 is positioned ...