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.

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