Check this out. 24 channel USB controlled. I'm planning to use it in my build. It's a DIY, or you can have it assembled and tested, but I'm in communication with the inventor who I'm having write extra firmware to control my exterior lights. It's an RGB LED controller but it might work for you? I also don't want to appear as I'm endorsing this unit. All I can say is that I'm having a heck of a time finding a controller for my project and this appears to be the only reasonably priced solution I have found.