CompletedVibe Filter (Guitar Pedal)
STDVibe Filter (Guitar Pedal)
License
：CC BY-NC-SA 4.0
Description
Hybrid guitar filter pedal based on a classic State Variable Filter (SVF) topology using the LM13700 and digitally controlled by an Arduino Nano.
The analog section implements a 2nd-order SVF (low-pass output used) with fully analog FREQ and RESONANCE controls.
Digital control generates a PWM-derived control current (Iabc) for the LM13700, enabling LFO, GATE/Trigger, and dynamic modulation modes without placing digital processing in the audio path.
True bypass is implemented via relay switching.
Analog and digital power domains are separated for noise isolation.
The project targets electronics enthusiasts and guitar players who want a true analog sound core combined with programmable, flexible control architecture.
Design Drawing
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