Schematics of the (known) Expansions  / Interfaces that were made and released by Camputers. Plus some "homemade" by me and other LYNX people.
I have remade the schematics from the originals that John Koushappas so kindly have scanned.
They are available for download here as high resolution XPS files.

Eprom Expansion board. CT 820005-01 / 02

16K ROM Expansion board.
CT 820024

Bank 3 Video Memory Expansion.
CT 820004

Joystick Interface.
CT 820007

Reset Assembly interface.
CT 820027

Disk Interface Assy.
CT 820021