Made a delay pedal using the ”PT2399” chip. The delay is pretty simple as of now, but I'm still working on it as well as maybe adding an atmega328(Arduino) to it. :
This Is The Delay Pedal You Can Build Yourself | Hackaday
Boss DD-2 Digital Delay Guitar Pedal Schematic Diagram | PDF | Power Supply | Electrical Engineering
How to design a basic overdrive pedal circuit - Wampler Pedals
Guitar Effects Schematics & Projects
DIY 4 Second Digital Delay – Electric Druid
Amazon.com: LANDTONE DIY Delay Analog Pedal and Sky Blue 1590B Case : Musical Instruments