Sometimes, you'll also encounter Arduino tutorials in the wild that include links to a Wokwi circuit as creators and developers typically create one to show the project's schematic diagram. Other ...

A hydraulic schematic diagram uses lines and symbols to provide a visual display of fluid paths within a hydraulic circuit. A hydraulic schematic also indicates the types and capabilities of ...

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 ...