Very Simple and Cheap Guitar/Bass Distortion Pedal : 4 Steps - Instructables
transistors - Why NPN and PNP in parallel in this distortion pedal circuit? - Electrical Engineering Stack Exchange
Characteristic Analysis of Simply Distortion Pedal - Rhea
Designing the Hard Bargain distortion pedal – Electric Druid
Very Simple and Cheap Guitar/Bass Distortion Pedal : 4 Steps - Instructables
How to design a basic overdrive pedal circuit - Wampler Pedals
Simple distortion effect circuit. A few parts such as chip TL072 and a few others, and you're done with a simple gui… | Diy guitar pedal, Distortion, Diy guitar amp
Characteristic Analysis of Simply Distortion Pedal - Rhea
How to design a basic overdrive pedal circuit - Wampler Pedals
Electra Distortion Pedal Variant - DIY: Build it and they will come Forum - KVR Audio