The Sony Access Controller (SAC) for PlayStation 5 (PS5) includes 10 buttons, a joystick, and four expansion ports. The expansion ports are for analog joysticks, analog triggers, and buttons.

The Wii Nunchuk handheld controller has two buttons and a joystick.

This project reads the nunchuk joystick and button inputs then drives three SAC expansion ports to relay the button presses and stick movement. A four channel DAC has just enough outputs for this.

Arduino and CircuitPython code are at https://github.com/esp32beans/nunchuk2sac