New design.
Adding support for 15 peripherals.
12 switches (12 pins)
2 rotary encoders (3pins)
1 joystick (3pins)
ARGB LEDs (1pin)
all of this shrunked perfectly for a 11pin xiao rp2040.
This design uses a resistor ladder, 4 switches in each pipe, with 4 different resistors, when a switch is pressed, it activates brings the resistor into a parallel configuration. All with zero ghosting. each key combination is uniqely recognized.
Found any problems? let me know.