...and I know that DMX 512 can send a variety of signals.
Hi Nathan, technically that statement is not correct. DMX is a very set, standard protocol. There is no variation to it regardless if whether the end item is a moving head, fog machine, laser, etc. What Erik said is correct - you’d need a device to receive DMX and convert/transmit the instruction via IR to your fixture. To my knowledge there is no standard to IR lighting control beyond possibly within a product range or manufacturer, so it’s likely that you’d also have to know what the fixture is expecting to receive in order for this to actually work. Arduino can definitely do this if you know the right IR commands to send, but honestly it’d probably be cheaper and more reliable to ditch the IR product in favor of a DMX variant (which I believe do exist). You could also consider retrofitting the balls with an easier to control light, or if you’re good with a soldering iron maybe adapting an Arduino to interact with the circuit on your remote, which would at least remove the IR protocol portion of the puzzle. Best of luck though!