A more versatile Overdrive pedal

There are lots of overdrive pedals in the world, but most of them follow the same formula, an operational amplifier circuit with negative feedback, 3 knobs that control gain, volume and tone, one type of signal clipping , no bass ajustment and sometimes aren’t true bypass.

This is my version, its based on the famous green box from the 80s. It has selectable bass, 9v to 18v operation for more headroom, selectable signal clipping and true bypass.

Inside we find the diode clipping selectors.