I would like to build a 3x3x3 or 4x4x4 LED cube. I can not find a schematic and codes for it. I have google it and found some which are in www.instructables.com. I am not member of it. I was hope someone could share it with me. Also, I need to know what kind of LED should we use. The cheapest I can find LEDa are in Allectronics.com. Does anyone have use this company before or are there other place that might be cheaper?