Love this. I can use a lot of these ideas in my dad’s Tinker Box. (see Tinker Box topic). One simple critique (being a little anal here) when you show a transistor (pictorially not schematic) you show two views but the views are opposite. What I mean is have both the overhead and front views with the flat side facing and down so that they are pinned in the same direction. The way you show them the overhead may show connections EBC but the front view which is unlabeled would be CBE (the opposite). I guarantee at least one student per class won’t notice this and they’ll invariably let out all the magic smoke. Other wise great job graphically. Haven’t checked your values and schematics but I plan to for my project.