Here's a nice little MOSFET-based clean boost that EQD used to make. It's actually pretty simil… | Electronic schematics, Guitar pedals, Electronic circuit projects
DIY Strat (and other guitar & audio projects): Building a quick Brian-May-style treble booster on Veroboard
How to design a basic overdrive pedal circuit - Wampler Pedals
Building a boost pedal/circuit. I don't understand the ground and a few other things! : r/diypedals