Excellent find. I will give the +5 v a try with external power and see if it works. I also saw this from the manual:

The connection should be kept "high" at 5v and a "low" level signal simulates a press of the switch.

Yeah, I saw that when I copied it a few post back, I guess my brain blocked it out because in my mind that seems backwards, but who am I to argue with a magician.

Ha. seems that the pins are always active with 5v all the time. I took an alligator clip and put it to ground and it worked like a button push. I also found out the labeling is reversed on my PCB, the speed controls are the mode controls, only figured that out by tracing the circuit on the bottom. The digital control seems to work, but seems to have to push twice to get the mode to change. But happy its working to a degree.

Hummm, so that makes me think that the high value from the ezbV4 should not matter, because the magician is always in a high state, it's just the low state that produces the TTL switch signal....did you try setting the digital port to off or low on the magician?

Yes i did and it triggers the mode to change. but when i switch the digital port in ARC it to on, it seems to act as a power off for a second and starts the demo mode, so i have to quickly press again and it starts changing the mode again. So its like 3 quick presses of the digital button to change the modes...crazy, but it works..ish

Ehh, phooie on that. It must really need that 5 volts. It's good to know though, because it looks like an awesome LED controller. Thanks for sharing your experiences with it and experimenting.

My pleasure!