LowPass FET VCF is based on H11F1 optofet.

LowPass FET VCF is based on H11F1 optofet.
This module is not only a vcf but a good sound design module with a unique range of sounds.

https://feedbackmodules.com/products/lpfet-vcf

• 20 mA +12V
• 20 mA -12V
• 0 mA 5V
• 38 mm Depth

Available as an assembled Module and as a DIY project.

This Module is currently available.