1x1 smelting + beaconed block 2 input and 1 output Beacons + smelters set to turn off if any are true:
- Output chests are full
- No trains en route
- All ore has left the smelters

Originally shared on the public FactorioPrints / Factorio School archive (factorioprints.com · factorio.school). Authorship preserved from the public catalog.
1x1 smelting + beaconed block 2 input and 1 output Beacons + smelters set to turn off if any are true: