There are a lot of different ways to successfully build a 3D printer, many of which are not covered on this website. If you want to learn more about firmwares, then click through some of the links below to external websites and forums.
The table below contains parts specific to this section that Dr. D-Flo uses and recommends. Depending on your printer build these parts may or may not be compatible. It is best to use the products below as a launching point to explore similar products on the linked websites. Affiliate links may be present below (depending on the vendor).