This control panel was designed to allow adding the Glen's Retro Show (GRS) Trackball and Spinner into an OpenCADE. OpenCADE was designed to allow you to easily add/expand new Arcade controls to a Raspberry Pi running RetroPie (for Retro Arcade games). It's highly configurable. For full details on OpenCADE, please see http://wagnerstechtalk.com/opencade . This page includes the assembly instructions/videos and everything you need to know to build one.
For even more help, check out our video here: https://youtu.be/0-kDvnYchwE
GRS Components needed for this build:
The spinner and trackball both assemble to the 12-n-1 Interface board. From there, you connect the interface board via microUSB->USB to the Raspberry Pi. The Interface board can be mounted inside the OpenCADE base using the existing standoffs using x2 M2 screws.