With this free web app, you can build circuits from scratch using three popular Arduino boards — Uno, Nano, and Mega — and ... containing your program, schematic diagram, and Wokwi link.

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 ...

The Arduino Mega's PWM pins are digital output pins located ... If your board has no printed labels, check out its pinout diagram documentation (found on the board's Arduino Store page).