For my Maker Toolbox, v1 of my Solid State Relay (SSR) breakout/test box. Relays are triggered by Capacitive input via a CAP1188, controlled by Pro Micro (or Nano, or QT PY, or similar).
As a PoC, I tied the CAP to the SSR for triggering (in the code, I reverse the polarity of the LEDs — like Doctor Who would do). I’m not happy with this method, as all relays trigger for a moment during startup. Since I’ve got the MCU in there, I may modify to Arduino direct to SSR, with software control.