The main controller is an ESP32 module, ... [Carl] started looking at ways to make a radial-flux PCB motor. His design has six six-layer PCB coils soldered perpendicular to a hexagonal end plate.

In terms of hardware, the custom PCB is home to an ESP32 WROOM, a MAX98357A I2S audio amplifier, a FT231XS USB-to-serial chip, with enough passives and regulators to keep them all well fed and happy.

Adafruit has announced the availability of the ESP32-S2 WROOM Module with PCB Antenna equipped with 4 MB flash and available to purchase priced at just $3.25. The new module is the single-core 240 ...