[Ynze] found a basic design that works, and built from there. One of the interesting things about [Ynze’s] amp, as well as many of the Gainclones, is the fact that they use no circuit board.

a very simple op amp circuit with some detail omitted If you open this circuit in the Falstad simulator, you’ll see two sliders to the right where you can tweak the input voltage. If you make ...