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John Lauer R0 engineering checkpoint: checked schematic, sourcing, servo evidence and safety-policy code; PCB and qualification incomplete 10054d3 1h ago

Digital asset provenance

The R0 digital assembly is not a verified complete twin. Native package bodies are from the official KiCad library and are generic package geometry, not exact manufacturer-authored MPN CAD. design/package-models.json records the fetched bodies. Standard KiCad assets retain their upstream license; reuse of a package model does not verify pin mapping, height tolerances or the actual part marking.

kicad/3d/LVK12.step is independently generated nominal geometry from the Ohmite LVK12 drawing: 3.2 x 1.6 x 0.5 mm body envelope and four terminals. tools/shunt_model.py and its adjacent provenance JSON disclose the simplified coating/substrate/terminal construction. kicad/lib/Load.pretty/LVK12.kicad_mod uses the manufacturer land-pattern dimensions and project-defined terminal numbering; the current and Kelvin terminals remain separate nets.

kicad/lib/Load.pretty/TI_DGS0010A.kicad_mod is independently authored from TI drawing 4221984/A (05/2015), shown in the DACx0501 and INA226 package addenda: 1.45 x 0.30 mm pads, 0.50 mm pitch, 4.40 mm row-center separation. It replaces the wider generic MSOP lands. The body remains generic MSOP-10 geometry.

The TO-220 model is the horizontal tab-up variant. The electrical tab is drain/load-positive; a touchable heatsink needs a verified isolator, shoulder hardware and clamp. A generic STEP body is not evidence for the fitted lead-form height or clamp pressure.

No manufacturer CAD for the selected heatsink/fan has been verified or bound into the PCB assembly. Their dimensions, hole pattern, airflow and thermal interface still need a coherent mechanical model and native fit review. Do not fabricate a bracket from an envelope-only illustration.

Source documents are retained locally for engineering reference. GCT's drawing carries a restrictive notice and is not included in the public project bundle. Links and independently authored design facts may be documented without redistributing that drawing.