Simple 3-channel dmx controller with 3 flash buttons/2 faders/1 potentiometer. Just hook up the buttons, faders and potentiometers, set the correct pin names and thats it. The buttons use the internal pullup so connect them to ground. For dmx out you need a differential transmitter chip like the MAX485 transceiver. Hook it up according to the datasheet and set the corresponding pin number for the D+ (non-inverted data) signal in software.