Smooth Stone is a Cobblestone block that goes through the smelting process twice. Therefore, to get Smooth Stone in Minecraft ...

Place the stone back into the furnace in the upper slot and it will yield you Smooth Stone with the same 1:1 ratio. The most efficient fuels to use in the furnace are coal and charcoal.

Creating Pulse Circuits: Redstone repeaters can be used to create pulse circuits, which are essential for devices like clocks ...