The Protean Green is a pedal based on the Protein/ODR-1 circuit. It is one half of a dual blues/Nashville pedal, but can also be built as a standalone unit. The PCBs are designed to easily combine the two sides in a larger enclosure.The Green channel is essentially a modified version of the Nobels ODR-1 circuit. The makers of the dual pedal decided to tweak the circuit to have less gain, but there is an option to build it with the original untweaked circuit for more gain.Another option is to add a bass control, making it a four-knob pedal. This modification helps to balance the bottom-heavy nature of the ODR-1 circuit.Due to the number of components, the PCB is designed for 3mm resistors, and reading the color codes may require good eyesight.

Summary created by AI from the original source.