Available as an assembled Module and as a DIY project.
This Module is currently available.
LDR-based filter with VCA
This module uses the same blackbox technique as the Shat-noir Phaser. The VCF is based on the Steiner diode VCF but this one uses LDRs rather than diodes and a CV control system to suit. The nice thing about this filter is you can feed different signals to the LP, BP & HP inputs then surf between them with your CV, quite different from regular filters. The VCA is really there to use up a spare op amp and is based on the Korg PS3100 VCA, works very well for what it is.
PCB set = USD 24
Panel = USD 22
assembled = USD 210
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These merchants probably sell this module. Huh?
Nonlinearcircuits Noiro-ze