I'm playing around with some op-amp tutorials, trying to get a grip on how they work. I'd like to build some of them to get a better grip on how they work. I'm on CircuitLab right now since I've got a student license, but I can't seem to find anything resembling an oscilloscope.
For example, I wanted to build a op-amp square wave converter circuit and play around with the resistances and other components right now and watch the response in a scope. What's the best way?