For the meeting on Oct/25: My colleague Patrick (@Patrick Fath) will do a live demo how to setup and run a mixed-signal sim in

ngspice

. For this he has prepared an example of a 3b Verilog counter tied to a 3b R-2R DAC (just to have a super simple example). Graphing in

xschem

is included as well. We will give you all files after the Chipathon meeting.