Explore the inner workings of EQ guitar pedals in this 22-minute video tutorial. Dive into the technical aspects of equalizer pedals, starting with a sound demo and block diagram explanation. Learn about crucial components such as power supply, input circuit, peaks and Q, filtering, and virtual inductors. Understand how boost and cut functions operate within EQ pedals. Access additional resources, including PCB availability and build documentation, to further enhance your knowledge of DIY guitar pedal construction.