Here's a simple buffer from JHS. It really only uses one side of the opamp (why not just use a TL071?) and … | Diy guitar pedal, Guitar pedals, Semi acoustic guitar
DIY MOD JHS little black buffer Drive Pedal Outboard Electric Guitar Stomp Box Effect Amplifier AMP Acoustic Accessorie|Electric Instrument Parts & Accessories| - AliExpress
Simple buffer and phase inverter - PARASIT STUDIO
1 x PCB The Buffer Pedal Effect Clone DIY Guitar 8053323217596 | eBay