I have been thinking of designing a new board with DMX input and one SPI (pixel) output. It would also have an on-board DC-DC converter. This would allow you to push 24V + DMX around the yard, daisy chain style (looping in and out of each element). The pixel string / strip would be 5V / 12V and the on-board regulator would convert from the incoming 24V and greatly reduce the voltage losses in the cable. I know some say "DMX - SPI is a dead duck", but I don't agree. It comes down to topology. Ethernet would require the data cables to be "home run", whereas DMX can be daisy chained. I am thinking that this board would be useful for things like mini trees where you only have 50 pixels max. Now, as to the question of an isolated DMX input, I think for a daisy chain situation, the extra parts cost would be hard to justify. Maybe the board can be offered in isolated and non-isolated versions. So, what's the interest factor here?