Im building an 8x8x8 LED cube but need to know if the arduino can1. connect to the 64 LED columns to switch each of the LED lines.2. Multiplex to allow me to isolate one LED [glow]and make animations exc[/glow].
I have been looking at 4051 MULTIPLEXING an extending the analog. to allow a maximum of 64 outputs is the the correct path?
The problem is not with the 4051, but rather that the PWM (pseudo analog out) isn't fast enough to render a "true partial voltage" to each LED in the time you need to scan across them to keep persistence of vision intact.
Now, my next goal is to use a D-to-A converter to send the true voltages to the 4051. That should clear that up (by circumventing PWM at the cost of using more digital lines for the d-to-a) and allow me to get shades of "grey" on my matrix.