The romans had circuitry. Maybe not electric powered, but water powered? Oh you bet. If they could rig up an entire senate to rotate like a lazy suzan by manufacturing ball bearings and hooking it up to advanced gearing powered by a river....?

Plus they knew how to work with lead metal, so other conductive metals werent completely out of reach, and they were masters of mass-scale uniform production. Their road structures and aquaducts barely even scratch the surface of what their engineers could do