Modular Synth Panels

I've been uploading some of my latest designs to my folder (DJB). 
These include:

three input mixer / spring reverb / 440Hz Std / output gain
dual trigger delay
headphone / main power switch / cable tester
single channel tape interface / delay
Kurzweil ribbon controller interface
dual LED voltage monitors (+/- 5 volts)
dual source with lag
multi-analog functions (analogic)

I use this last one all the time.  It's a dual analog OR/AND with
INV.  The OR outputs the maximum of any of three inputs.  The AND
outputs the minimum of any of three inputs.  The INV is selectable
for CV or audio levels.