I wanted to use the WiFi controller instead which I know I can however after figuring out what wires were my pos and than my r g and b I found out that this is a cathode led bar. This had a controller box with a remote to control the colors patterns etc. I also have a rgb illumination grill bar for my car. I have a Oracle WiFi controller used to control led light bars via remote or cell phone in am app. I know this is old post but could use some advice as I am not completely electronic swavy. I would really appreciate if you could help me with this as I would like to have my lights up and running again and not have to use the old controller it came with. Like I said I am not electronic inclined so talk of mosfets and such makes no sense to me haha. I have someone who can make the board for me as well. I don't want to bother you is there a way you could help me figure out what all parts I would need to make something work? I can provide any information about the lightbar you would need. I tried to look for any convertors all over the web but have yet to see anything other than what you had come up with. There were 11 wires that ran from the light to the controller box, I figured out which would be my positive and which three would be my R,G,B neg but didn't realize they would be opposite from my new controller. I found a better controller though that would run on my phone so that was the initial reason why I wanted to do this. It had a separate controller box that plugged into it with a transmitter to change the lights and patterns. I do know it is a 22' RGB Scanner bar as shown in the website link I posted. I am just not technically inclined with electronics so am having some trouble. I had already figured on making a waterproof box for it or run it into the car itself.

Led cathode and anode