Time Manipulator Is an Arduino-Based DIY Time Delay Guitar Pedal - Hackster.io
DIY MOD Boss CE 2 Chorus Pedal Pedal Electric Guitar Stomp Box Effect Amplifier AMP Acoustic Bass Bundle|Electric Instrument Parts & Accessories| - AliExpress
Schematic diagram of Boss CE-2 chorus pedal | Diy guitar pedal, Electronics basics, Guitar pedals