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Boss DM-2 Delay Guitar Pedal Schematic Diagram
MASSIVE DIY DELAY PEDAL - YouTube
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Diy Delay Guitar Effects Pedal Kits With 1590b And Icpt2399,tl072cp Pedal Kits - Guitar Parts & Accessories - AliExpress
The Valve Wizard
Pedal effect circuit design: getting started - EDN
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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. :
DIY Reverb Pedal Circuit: Spring-Hall Reverb with PT2399 IC – Deeptronic
BOSS Talk: I Love Analog Delay But What Is A BBD? - Roland Australia
How to Significantly Improve a Simple PT2399 Delay Circuit | Circuit Salad
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