No, no obj’s here, and in fact I was thinking about this a few days ago. I was looking at this guy’s circuit and thinking how similar it is to an automotive workshop manual wiring diagram, so I was thinking of using FZ to do it. The only problem is there isn’t any simplified system diagrams for an object, ie, a trigger sensor and toothed wheel, in FZ. It’s not a problem for me as I can make them, but for you it might be hard to make stuff. To make parts you need to draw it in a vector drawing program, and add terminals to the FZ part standard. The way I would do it, if a part has 3 connections I would use a 3 pin header part and then draw the pic of what I wanted in that svg.
I made some tutorials a few years back if you’re interested.