What transistors did you use ?The ones in your drawing are connected in an a-typical way.There are no resistors in the base connections of your transistors, is that the way you are using them ?If you are not sure about the connections you used, show a photo that clearly shows how they are connected, or make a drawing of the housing and what you connected.That only is useful if you mention the transistor type you used.
My problem is that stray leds light up. Could not putting a resistor to the base affect the current or switching frequency? I don't know much about such details.
The cube is basically the matrix bent into an S shape and lacks the last column of the schematic.
QuoteThe cube is basically the matrix bent into an S shape and lacks the last column of the schematic. Does this mean that you have built the circuit as per the schematic but have not built the last column into your setup?From what I see of charlieplexing you need ALL of the circuit for it to work. It relies not just on transistor but the diode action of the LEDs to work.Tom.PS Double check your LED polarities as well, one LED in the wrong way round with charlieplexing does not just mean that it will not glow, but it will upset how the rest of the array works.
Then why don't you show the code to have it verified ?