The Organiser II, with its brand-new USB interface One of those enthusiasts is [James Stanley], who designed and built a USB interface for the Psion Organiser II.

Options to power the Arduino Nano include USB, VIN, and 5 volt pin, meaning you have power options for almost any situation.

The motor is controlled via an Arduino Nano and an A4988 stepper motor driver. However, that only covered the mechanical side of things.

Arduino Maker Nano RP2040 “Slightly shorter than a Pico, this board has 30 pre-soldered pins, all helpfully labelled on the silkscreen.