This is a faceplate for the ZX Interface 2.021, a new cartridge interface for the ZX Spectrum 16k/48k machines that includes a Sinclair joystick interface - just like the original. The cartridge slot have been expanded in order to expand the maximum cartridge size beyond the initial 16k using bank switching, mainly allowing me to create cartridges with just a handful of components.

I'll be creating a whole selection of cartridges for the interface, have a look at my PCBWay Shared Project for a filtered list of all shared projects that's related to this interface. For documentation, including the BOM, build instructions as well as everything else that you'd need - check out the github-repository.