Use the schematics on the github page to help you with installation of the components:
https://github.com/Bastardkb/charybdis-pmw-3360-sensor-pcb
Depending on how you got the sensor, it may come preassembled or you might need to solder the components yourself.
Install the components
Install the LDOs
- LDOs are Low-Dropout Regulators
- There is a 2V one, and a 3.3V one
- Install each according to the Kicad schematic
Install the capacitors and resistor
- Install the capacitors and resistor according to the schematic
- Orientation doesn't matter
Install the level shifter
- The level is has 14 pins, seven won each side
- Align the side with the chamfer with the dot
- Solder the pins
Install the sensor
- Install the sensor according to the picture
- Make sure the dot on the sensor is aligned with the square pad
Connect the sensor to the shield PCB
- Locate the side which hosts the trackball
- Connect the 6 cables from the sensor PCB to the elite-C shield PCB of this side
- Make sure the legends align
- Use the picture below for reference
