Sometimes, you'll also encounter Arduino tutorials in the wild that include links to a Wokwi circuit as creators and ...
it’s great for a quick-and-dirty circuit diagrams. Not exactly schematics, but [Duckman] has some Arduino pinout diagrams he made using ASCII-art. These could be useful when pasted into source ...
He also integrated a 3W amplifier into this build, and everything is controlled by an Arduino including a ... and also because all of the circuit schematics are available for all of the components ...