First post here on the forum; I thought this might be useful for some.
I’m an electrical engineer and I had the goal to add stand alone printing to the K8200.
So first of all; I ordered this cheap RepRapDiscount Full Graphic Smart Controller from Ebay. It cost only 10 dollar.
Final result:
The K8200 has an 18-pin connector on the top right of the mainbord. Using Eagle I created an PCB that connects the full graphic display to the K8200 mainboard. For the pin layout see: k8200-wiki.de/Grafisches_Display
Connector:
The space between the connectors are a little short. Also the rotary encoder seems to work upside down but I am not sure about if that is a firmware problem, connector problem or a problem from the display board. However, it works great! I had to order 10 pcb’s so if someone is interested feel free to PM me!