Standing less than three inches tall with a screen no larger than a thumbnail, Phillip Burgess has created what is likely the tiniest MAME cabinet known to man.
As documented on its Adafruit page, the cabinet was built during an impromptu weekend hack session using a Raspberry Pi Zero, a 0.96-inch RGB OLED display, an audio amplifier, and a few other small components. Although functional, Burgess admits that it’s “only marginally fun to play, aside from the incredible ‘gee whiz that’s tiny!’ factor.”
Could it go smaller? Undoubtedly! Other than clipping the corner off the audio amp board, these are all stock parts and no extreme measures were taken to further reduce their volume, Ben Heck-style.