portcullis
Portcullis is a eurorack 2 channel Vactrol VCA with an Attack/Release envelope. One can either insert a gate to drive the A/R and control the vactrol or use an external gate/signal.
With no input signal on in, the A/R signal is routed directly to out. So you can use portcullis both as a vca and to produce A/R CV signals.
The A/R effectively swings between the millisecond (?) domain to 10 seconds of release.
portcullis top
portcullis pcb design
I made this module to free up some space in my rack. But you always end up with more material than you need :) If you’d like to purchase one they can be had built for 72 euros. You can also purchase at etsy, https://tonetoys.etsy.com/listing/1870556382 or on tindie https://www.tindie.com/stores/poetaster/
Open Sources includes fritzing files, and the gerber files when the final production run comes in.