The architecture is now correctly defined as:
- 29 V DC → controller power only, regulated down to 3.3 V for the ESP32.
- Existing external 5 V passes directly through from the input RGB connector to the LED-rope connector.
- SI2310 MOSFETs sink the rope’s R/G/B channels.
- External R/G/B inputs remain active-low, open-drain signals.
- The 29 V supply ground, external 5 V source ground, MOSFET sources, and logic ground must be common.
Already completed before this correction:
- TMUX4053 source-selection circuit
- Open-drain input conditioning
- Three MCC SI2310-TP MOSFET stages
- Two JST-PH 4-pin, 2.0 mm RGB connectors
- 30 × 30 mm four-layer board outline
The final 29 V-to-3.3 V regulator redesign and resulting placement were dispatched, but I could not inspect or verify the completed result. The last verified placement was still too congested for a credible routed 30 × 30 mm board.
Execution stopped because your ACUs ran out.