Not exactly schematics, but [Duckman] has some Arduino pinout diagrams he made using ASCII-art. These could be useful when pasted into source code as comments, documenting the pinouts for your ...

Mitochondrial genome contributes polypeptide subunits to the five enzyme complexes that comprise the oxidative phosphorylation (OXPHOS) system within the inner mitochondrial membrane, the site of ...

Well, you probably had a schematic drawing template. We were surprised you can still buy these at high prices. Or you can 3D print your own, thanks to [Jan Stech]. Templates of all kinds used to ...