Arduino code for driving simple 4x4x4 LED cube.
This particular cube uses two 74138 3to8 decoders to select a column and 4 transistors to select a level. Level represents joined anodes of 16 LEDs on one level. Column represents verticaly joined cathodes of 4 LEDs. There are only 8 pins needed to control the cube. Only one led in every level can be lit at a time. This makes max currents very manageable by microcontroller (circa 7 mA). Unfortunattely it also limits performance of cube when used in "persistence of vision" scenarios.
There are more detials available on my website.
