Self-made analog delay pedal using BBD (BOSS DM-3 MOD)
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. :
Digital Delay Pedal : 19 Steps (with Pictures) - Instructables
Boss DD-2 Digital Delay Guitar Pedal Schematic Diagram | PDF | Power Supply | Electrical Engineering
pcb design - Comparator on an op-amp in a PT2399 delay pedal - Electrical Engineering Stack Exchange