I am using this:
with the multijoystick.py code to control 10 servos. 4 are analog signals (roll, pitch, yaw axes) and the other 6 are just digital buttons, pretty standard for a joystick. Anyway, I would like to keep the usb to the PC but add another 20 or more analog inputs. I saw one persons schematic of an 8 analog axis controller but it was limited by the number ADC's. I have looked at multiplexing but i'm not sure if I can specifically use it for this.
i'm still pretty new so i'm wondering if anyone has any advice on this?