PSX controller to USB adapter using a Pro Micro, with minimal lag (0.9 ms per scan).
Supports both classic and Dual-Shock controllers.
When using a Dual-Shock, enabling ANALOG on the controller adds a small (0.6 ms) lag per scan.
Uses those two libraries:
https://github.com/Jerther/psxlib
And a slightly modified version of ArduinoGamepad to reduce lag specifically for a PSX controller: https://github.com/gamelaster/ArduinoGamepad