Users can build schematics using standard symbols or opt for more friendly illustrated diagrams. The process involves placing components and drawing ... circuit designs seamlessly. Circuit Canvas ...

Their free service requires ... Their embeddable schematic window can be rendered in full screen mode, and gives users the ability to zoom in on any portion of the drawing to see the circuit ...

While we wouldn’t want to document a computer motherboard with ASCII schematics, it’s great for a quick-and-dirty circuit diagrams. Not exactly schematics, but [Duckman] has some Arduino ...