Hi I just downloaded the PDF for your cube and was wondering if the shift registers are 74HC959 as stated or if they are in fact 74HC595's. It's just that I cannot find any real references to 959 's online. Is there any chance of you sharing your code as I cannot find if on your website. Nice cube and thanks for the PDFPedro.
Try this one.http://www.jameco.com/Jameco/workshop/JamecoBuilds/4x4x4ledcube.htmlUse 9 outputs to drive the columns.Use one output to drive a transistor per layer to sink current to turn that layer on.
For obvious reasons, it is vital to have functioning LEDs. I found out the hard way that it's much easier to test the individual LEDs before you solder them together. Sticking an iron to desolder a damaged LED in the middle of your cube is as tough as it sounds. Take the time to test them. You can hook the LEDs up to a 3 volt power supply and briefly powering on, use an LED Tester, or simply use a coin cell battery. Hold the coin cell between the legs of the LED and then squeeze the legs. You don't need a resistor since the coin cell runs at 3V and you are only touching it for couple seconds.
Wouldn't the resistor help prevent damage if you connect the LED backwards while testing
Wouldn't the resistor help prevent damage if you connect the LED backwards while testing?