The CHIP Pro is the main board for the Holoseat controller. It is produced by Next Thing Computing (NTC).
The Feather is the HID USB board for the Holoseat controller. It is produced by Adafruit.
The "TLE4966":Speed & Direction Sensor TLE4966 is the proposed sensor package for Holoseat. It is produced by Infineon. It comes in a number of form factors, listed below.