Romu, the RP2350 Board Small Enough To Lose

A nifty little project came across the Make Discord the other day:

Romu is a tiny dev board by Bitmerse that’s powered by a Raspberry Pi PR2354A and runs MicroPython. And tiny it is. At just 15.5 × 12 mm, the board is barely bigger than the chip itself and fits almost entirely in a USB-A slot (there’s still some PCB left for you to grab to pull out).

Photography by Bitmerse

With such a small size, there’s not much space for extras like switches or exposed GPIO pins. So what’s the case for using it instead of a simulator, aside from the authenticity points? Well, they did manage to squeeze in a capacitive touch button and side-mount RGB LED, which the team points out unlocks “a wide range of practical daily applications.”

“For example, Romu can easily act as a Universal 2nd Factor (U2F)