I actually need to build one of these in my base but the problem is that I don’t know how. I want a super smelter where I can put like 2 stacks of iron, 1 stack of gold and 2 stacks of copper and it must first take all the items from the chest until it is full and then start smelting them and collect them and put them in a chest. I also want to make it so that all I have to do is put them in the chest to smelt and they should only work and the minecart with hopper or chest will only move if there is stuff to smelt. I know it’s very complicated to understand but if you could link me a tutorial for what I want, I’ll very thankful.

Can you have a hopper Minecraft fill the fuel portion automatically?

You don’t need the hopper minecart on the bottom you can just have the hoppers directly guzzling out the cooked stuff from the furnaces