Pedal effect circuit design: getting started - EDN
Doctor Pedal - Pedal Effects Dissected
GEO's Effects Schematics
I plan on building a diy guitar pedal based on this schematic, but I'm not sure what the circled part could be. My electrotechnics profesor told me that I need a Time
from schematic to reality
MXR Distortion + guitar pedal schematic - meaning of +4.5V - Electrical Engineering Stack Exchange