Prototype Architecture — Overview

Board P — Locked Spec and Net Table

Board L — Driver, Control, LED Array

Decisions — Chosen vs Rejected

Next Steps — The KiCad Phase

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Prototype Architecture — Overview

Board P — Locked Spec and Net Table

Board L — Driver, Control, LED Array

Decisions — Chosen vs Rejected

Next Steps — The KiCad Phase

Architecture

Architecture

The locked prototype architecture — board split, net tables, final BOM, and the decisions behind each. This is what the KiCad phase starts from.

Prototype Architecture — OverviewThe locked prototype architecture for the lamp — two boards, a 24-LED warm-white array at 500mA, an AL8860 constant-current buck, an STM32G031 control MCU, and an EC11 knob mapped to brightness. Decisions, not options.Board P — Locked Spec and Net TableThe USB-PD front end as locked for the prototype build — adopted unchanged from the power-section audit, with the downstream connector pin assignment fixed and the ratings decision re-confirmed against Board L's actual load.Board L — Driver, Control, LED ArrayThe locked Board L design — 24 warm-white 2835 LEDs in 8 parallel 3-series strings at 500mA, an AL8860 constant-current buck, an AP63203 3.3V rail, an STM32G031 MCU and an EC11 knob, with a complete pin-level net table and worked component math.Final BOMThe complete prototype bill of materials for Board P and Board L — every part with a lookup-verified LCSC number, JLCPCB tier, stock, and the Extended-part fee arithmetic that dominates the order cost.Decisions — Chosen vs RejectedEvery architecture slot recorded as a decision — what was picked, what was rejected, and the reason, traced back to the power and research pages.Next Steps — The KiCad PhaseWhat happens after this architecture is locked — schematic capture order, the footprint and CPL rotation pipeline, BOM/CPL export, the staged bring-up sequence, and the open questions that need bench answers.

Prototype Architecture — Overview

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