If you’ve never considered owning a greenish, slightly radioactive device that glows in a circular pattern, then this Uranium Glass Marble Ring Oscillator, or UMRO might change your mind. It nominally runs on a 9V battery, and is small enough that it could be worn as a steampunk-style pendant or placed into an antique flashlight case as creator Aeon Junophor did with his. Or one of his at least, as he’s geared up to build multiples of this interesting unit.
