In the fantasy world of schematic diagrams, wires have no resistance and square waves have infinitely sharp rise times. The real world, of course, is much crueler. There are many things you can use to ...
The simulator probably won’t lure you away from LTSpice, and there are other Web-based alternatives like TINACloud and others, but the simplicity of the Falstad simulator (and the new HTML 5 port) ...