{
  "revision": "v4 / archived LED bridge support and assembled light-mount section",
  "renderer": "Blender 4.4 / Cycles 64 samples / AgX",
  "coordinate_units": "millimetres",
  "mechanical_geometry": "Original v1.3.2 base, 08_LED_Bridge, 09_Diffuser_0p8 and v1.3.1 lid tessellations. Presentation cuts remove walls or half-sections; no source files or manufacturing geometry are modified.",
  "support_chain": {
    "base_shelf_top_z": 9.4,
    "bridge_foot_bottom_z": 9.4,
    "bridge_rail_bottom_top_z": [
      16.6,
      17.6
    ],
    "nominal_tape_bottom_top_z": [
      17.6,
      17.8
    ],
    "reconstructed_led_envelope_bottom_top_z": [
      17.8,
      19.8
    ],
    "diffuser_bottom_top_z": [
      22.15,
      22.95
    ],
    "led_to_diffuser_nominal_gap": 2.35,
    "strip_centre_y": -11.1,
    "bridge_foot_centres_x": [
      -23.2,
      23.2
    ],
    "note": "These are archived CAD dimensions and design allowances. The 2 mm LED height and 0.2 mm adhesive are assumptions, not measured hardware or a certified clearance result."
  },
  "changed_from_v3": "The unsupported strip base moves from Z20.325 to the archived Z17.8. The actual archived bridge, both feet and corresponding base shelves are visible. The strip package envelope now follows the original 2 mm assumed height. Six LEDs remain straight along the intended light window. Schematic LED leads meet the new terminal positions.",
  "reconstructed_parts": "DRV2605L module, LED package details, low carrier contacts, adhesive envelope and leads are approximations. Battery and LRA use user-reported envelopes. See the v3 model-completeness report for full component provenance.",
  "limits": "Intended mounting study, not a confirmed physical assembly. Driver/LED shapes, solder, tape, wires and mounting fit are not measured or validated. No hidden traces or vendor identities are invented. The diffuser material is illustrative, not a light-transport simulation. The local section omits wiring for clarity.",
  "sources": [
    {
      "path": "03_外壳与3D打印/Fermata_Lid_v1.3.1_Clearance_Revision/mesh_data.json",
      "sha256": "d656e489fc74b942f89f85276e4cdec732b6f7ab8ede4271d3329b3ae076f79f"
    },
    {
      "path": "03_外壳与3D打印/Fermata_Enclosure_v1.0_Snap/mesh_data.json",
      "sha256": "fc9545b62f00e0fe600789760106eeff5341af649f6b1bd920483a6402d87a18"
    },
    {
      "path": "03_外壳与3D打印/Fermata_Enclosure_v0.8_Integrated/mesh_data.json",
      "sha256": "95375357fb6aedc90fd0e0c3630b0ab15fa23e2de038671588f4b6ee0d9c3740"
    },
    {
      "path": "02_硬件与PCB/朋友提供的PCB原始工程/手表.step",
      "sha256": "1fe733e4f7aa939b77aed6607640ec4ed2411cf765b3cb3917662d9e186fbedf"
    },
    {
      "path": "03_外壳与3D打印/Fermata_Enclosure_v1.1_Strap22/STL/01_Base_Snap_Strap22.stl",
      "sha256": "5ad05de0d304836f40b69d332d8615c0ce611850304e538a83e7068eb11e9d8e"
    },
    {
      "path": "03_外壳与3D打印/Fermata_v1.3.2_X1C_电池短边出线/STL/01_Base_Strap22_Battery_Short_Edge.stl",
      "sha256": "83119d9765aaffc1f93b823e411f1ac4a9fb367f598c5454630ac3fbe2a33c07"
    },
    {
      "path": "06_作品集与展示/Final_Presentation_2026-10-19/IMG_7143.HEIC.png",
      "sha256": "798ddb007f050793006e0ee0d0f33bbd9426bf89a69e44a4e899429130e15ac9"
    },
    {
      "path": "03_外壳与3D打印/Fermata_Enclosure_v0.8_Integrated/parameters.json",
      "sha256": "72be314b2a45c7fc03d1d5788d7a35914fe309db367ad7a8521a96c57e92894b"
    },
    {
      "path": "03_外壳与3D打印/Fermata_Enclosure_v0.8_Integrated/build_enclosure.py",
      "sha256": "368e2fb05c7a14f2b7473d9b74a174fcb753a9b1868b6e0c2f49f6ea7a5fdc8f"
    },
    {
      "path": "03_外壳与3D打印/Fermata_Enclosure_v0.8_Integrated/README_打印与装配.md",
      "sha256": "d56eb67397351da732bcefdae58bdc435ad1472611f031ce8bdf587b9a7d99e4"
    },
    {
      "path": "03_外壳与3D打印/Fermata_Lid_v1.3.1_Clearance_Revision/build_lid.py",
      "sha256": "d4e79e8293df1a8a006c4a603bb108c2b1de8f11ac4d3ba89369eec650168151"
    },
    {
      "path": "03_外壳与3D打印/Fermata_Lid_v1.3.1_Clearance_Revision/README_先打小试片.md",
      "sha256": "668500ce38bbbdac506ae248c1b98c1533cbd14da3f61934b390fad07c99532d"
    },
    {
      "path": "07_原始开发工作区/原始项目/outputs/Fermata_Hardware_Test_2026-10-09/测试结果与操作.md",
      "sha256": "bb655845ce6ab8de1041db8e85614c3a06ef3d985de20ffc85726214dc3344f1"
    },
    {
      "path": "04_固件与手势识别/Fermata_Pair_v0.3.28/FermataBand/Config.h",
      "sha256": "bcc8007b4f566d6046b04ef9f18759ec48bf147be27deb414077f24576c76b78"
    }
  ],
  "assets": {
    "electronics-supported-v4.png": "Open housing study: the straight six-LED strip sits on the archived bridge; both bridge feet land on original base shelves. Outer walls are cut away for visibility. Lid and diffuser are omitted in this open view.",
    "light-mount-section-v4.png": "Assembled section through Y−11.1 mm: base shelf, bridge foot and rail, nominal adhesive, six-LED envelope, 0.8 mm diffuser and original lid light window. Nominal heights retained; front roof and rear half removed only for presentation."
  }
}