RV Smart Light Switch Design

flux

I haven’t made any project changes yet. Your new Flux project is still empty, and I’m currently blocked from executing design work because there are no available ACUs.
For this RV smart switch, the key design decision is safety isolation: the 12 V DC lighting and 120 V AC lighting should be handled as separate isolated domains, especially in a thin wall enclosure. A good architecture would be a low-voltage capacitive-touch front panel controlling 8x 12 V DC outputs via MOSFETs and 4x 120 V AC outputs via isolated relay/SSR modules, with clear creepage/clearance and preferably a separated high-voltage rear section or external relay pack.
Open items:
  • Define load current per 12 V lighting channel.
  • Define 120 V AC load type and current per channel.
  • Decide whether 120 V switching must be inside the thin wall panel or can be moved to a remote relay box.
  • Decide touch interface style: glass/acrylic overlay, capacitive touch ICs, backlit buttons, dimming, Wi-Fi/BLE, etc.
  • Confirm RV power source availability for control electronics, likely 12 V DC input with 3.3 V regulator.
Suggested next steps once ACUs are available:
  1. Create a project specification for the 12-gang RV smart switch.
  2. Draft the electrical architecture with isolated low-voltage and mains sections.
  3. Select touch controller, MCU, 12 V MOSFET drivers, and isolated 120 V switching parts.
  4. Build the schematic with safety notes and bring-up plan.
  5. Plan a thin mechanical layout, likely split into a front touch PCB plus rear/remote power switching board.
Create project spec
Remote relay box
Touch panel architecture
Find touch controllers
Save safety requirements
  • Generic Inductor
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