https://www.instructables.com/LED-Cube-3x3x3-with-ATMEGA8/
LED Cube 3x3x3 With ATMEGA8 : 6 Steps - Instructables
LED Cube 3x3x3 With ATMEGA8: An interesting project and already much discussed in the forums and also in videos. Although it appears complex,it is a simple...
led cube6 steps3x3x3atmega8instructables