The logistic heart

last updated 01.12.25

There is some of the blueprints i put on ALL my bases. After 2.0 you can control assemblers recipes, this tecnically allows you to make a botmall with only 1 assembler, but on a real schenario i find this way too slow, the middle ground i like to both speed and complexity is this!

Another common problem with other designs is the constant changing on requests for the blue chest, this can cause a bunch of trash in your network, along with unecessary robot usage.

My solution was to make "specialized units", one assembler only makes one type of item (as they use similar ingredients). One important thing on this design is that it really dont like a recipe that uses a item it have to make, i tried for quite some time making a single assembler make steel chests and logistics but all my solutions were worse than just putting another assembler (in complexity and space)

You may ask how this works...

First of all, there is a constant combinator set to our "wanted itens" (most of the time you will get 1 more than requested)

As mentioned the selected recipes should require similar ingredients. This is because the my design features one mechanical arm to put the ingredients back in the blue chest when the recipe changes, this behavior can be changed with the "trash unrequested" option, the important thing is you need to get the ingredient itens out of the output chest, if you dont it will clog eventually.

Now we compare the output chest (green) with the constant combinator (red), if Any red signal is bigger than the green, output it.

(This simple comparation circuit is so incredible usefull and i've been using it since i learned it)

Now use the signal to set the assembler recipe!

Now there is logical questions when considering using this kind of designs. First of all, why?

On the most of the planets this just serve to compress you bot mall a little bit because you wont need every chest type or circuit buiding at all times.

The real use case to this circuit design is for space platforms! this deserves another page just for it: