Voltage controlled filter that I built for my techno rack. It’s based on “Korg late MS20 filter” by René Schmitz.
René explains in the description how to add the high pass input. I didn’t manage to make it a switch, so there are two separate inputs for high pass and low pass 🤷♂️
Then I accidentally found out that if I remove one of the diodes in the original design, the resonance gets a crunchy color (which I find particularly nice for bass voices). So I implemented this function with a switch: Soft and hard resonance.
Left and right view on the module:
Control board (bottom):
Main board (top and bottom):
Revision 2 (breadboard prototype)
Revision 3 (two piece PCB)
- Video Demo
- Schematic (PDF)
- BOM (XLS)
- Panel Gerber files (ZIP)
- Control board Gerber files (ZIP)
- Main board Gerber files (ZIP)
- Showcase and feedback on Instagram
- Improvement potential on GitHub (issues)
What’s new? Optimized footprints, panel design and documentation.