ebrown1972 Posted December 21, 2019 Posted December 21, 2019 With the shimmer effect work correctly using a ctb16pcg3 in dmx mode? I thought I had read that in the past but couldn't find the answer. Thanks, Eric
k6ccc Posted December 21, 2019 Posted December 21, 2019 It should at least sort of work. Remember, DMX only knows one command - current level for this channel is this value (0 to 255). So to send a shimmer, the show controller has to send a value of 0 for one frame, and then whatever lit value you want for the next frame; then keep repeating (for example: 255, 0, 240, 0, 225, 0, 210, 0, 195, 0, 180, 0, 165, 0, 150, 0, 135, 0, 120, 0, 105, 0, 90, 0, 75, 0, 60, 0, 45, 0, 30, 0, 15, 0 would produce a shimmer that started bright and ramped down to dark in about 3/4 second). Because of the refresh rate for DMX, the max you can get is just under 23 pulses per second. As I understand it, a LOR AC controller does the shimmer in sync with the 60 cycle AC power and is A ) a faster shimmer than DMX can accomplish, and B ) all the controllers would flash in sync with each other because they are all syncing to the same power timing - something else that DMX can't do. BTW, I have 8,000 channels of DMX that on a couple songs make extensive use of shimmer, and it looks just fine. Note that this is E1.31, not DMX over RS-485, but the result should be the same. I also have shimmer on LOR DC controllers which of course can't shimmer in sync with the AC power. I never use shimmer on any of my AC channels except occasionally one segment of a singing face (when JR sequenced it that way).
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