Lovely. And I really like the design aesthetic of the knobs and switches (similar to analog computers which I also find pretty fascinating). I've seen the varia

Lovely. And I really like the design aesthetic of the knobs and switches (similar to analog computers which I also find pretty fascinating). I've seen the variable voltage regular to change output amplitude trick in circuits where that signal is low impedance and designed to have a lot of drive current. One was a pulse generator that provided the signal for an animatronic robot, and the pulses were basically used directly to fire the solenoids on the pneumatics. Saved having a transistor on every solenoid.