With these quad boards and each of the color temps of the E21 being equally useful in different circumstances I think it is time to revisit RGBW-type drivers. In terms of UI, the closest thing I’ve been able to find is this simple djozz’s hack. In case of quad boards each channel would go to individual E21. This is something I will certainly attempt to do when I have tested these boards with these LEDs.
What would be ideal to have though is a full featured programmable driver which would at least allow one to program current setting for each individual channel (the UI being the same, ie progressive switching to the next LED) but preferably the ability to also set specific switching for an arbitrary amount of modes. For example mode1 = LED1@10mamp, mode2=(LED1+LED2)@1amp.
So far I’ve been able to identify here only one RGBW driver more advanced that the djozz’s hack, which is this one, but the firmware went in a very different direction than what I am discussing here.