Just thought I'd show you my raspberry pi QLC+ project
(Pics on Flickr, hope that's cool)
https://flic.kr/s/aHsmtUMTXG
Using pitft screen, but use wireless mouse rather than touchscreen, as more user friendly; really need another roll of that red tape (reflective motorcycle rim tape, to try and stop people treading on it!)
Large silver button is momentary guitar stomp box switch, used for safe shutdown and wake.
Led and small black button on top, and aerial on side, are for wireless dmx transmitter. I've used the uart to dmx circuit discussed elsewhere on this forum, and connected one of the outputs to a £7 transceiver board from eBay. I used the same boards to modify my lights; far fewer cables!
I fitted an adafruit real time clock board, primarily so that I can display a large real time widget; very useful on stage.
I included code so that I can set the screen brightness using pwm; need to edit code if I want to change the brightness. Figured it would help reduce the current draw. In the pics it's the final gpio line that you set the brightness; in the pic it's set to 100.
Small silver TRS socket on side is for wired dmx out. It's connected to one of the other uart to dmx converter outputs, and I use a TRS to XLR convertor cable I made; mostly redundant once I fitted the wireless dmx module.
Thank you to everyone that posted info and answers I have used in this project
