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A modular synth project

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Main components

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Part NumberDescription
TL072Single JFET Input Operational Amplifiers, DIP-8/SOIC-8
PT2399Echo Processor IC, DIP-16
L7805Positive 1.5A 35V Linear Regulator, Fixed Output 5V, TO-220/TO-263/TO-252

Delay schematic

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Delay board layout