{
  "reviewed_utc_date": "2026-09-05",
  "scope": "Published references are not measurements of Walter. Unknown entries are not zero watts.",
  "components": [
    {
      "id": "pi",
      "name": "Raspberry Pi5 board",
      "watts": 12,
      "kind": "Published approximate peak workload reference",
      "source": "https://www.raspberrypi.com/news/introducing-raspberry-pi-5/",
      "note": "About12W for pathological workloads in launch testing. Not a fixed TDP, universal maximum, or SoC-only heat source. The27W supply rating is not the board heat output."
    },
    {
      "id": "screen",
      "name": "4-inch720\u00d7720 display",
      "watts": 1.8,
      "kind": "Manufacturer standard consumption",
      "source": "https://www.waveshare.com/wiki/4inch_720x720_LCD",
      "note": "5V,360mA standard. Maximum current is TBD in the manufacturer table. Brightness/actual board and wiring must be measured."
    },
    {
      "id": "radar",
      "name": "MR60BHA2 kit",
      "watts": 0.8,
      "kind": "Manufacturer active-mode figure",
      "source": "https://wiki.seeedstudio.com/getting_started_with_mr60bha2_mmwave_kit/",
      "note": "0.5W standby,0.8W active;1.4W with Grove relay scenario.5V/1A is the specified input supply, not constant5W dissipation."
    },
    {
      "id": "cooler",
      "name": "Pi cooler",
      "watts": null,
      "kind": "Purchased cooler match pending",
      "source": "https://datasheets.raspberrypi.com/cooling/raspberry-pi-active-cooler-product-brief.pdf",
      "note": "Official reference lists1.09CFM maximum airflow and8000RPM\u00b115%. Neither is measured enclosure exhaust flow. No installed fan pressure curve or measured cooling resistance is available."
    },
    {
      "id": "audio",
      "name": "USB audio + two8\u03a9 speakers",
      "watts": null,
      "kind": "Input power unmeasured",
      "source": "https://www.waveshare.com/wiki/USB_TO_AUDIO",
      "note": "2.6W/channel is amplifier output into4\u03a9, not the USB input or output into the purchased8\u03a9 drivers. Speaker5W nameplates are not constant loads. Measure input with representative audio."
    },
    {
      "id": "aux1",
      "name": "Third-eye screen",
      "watts": null,
      "kind": "Input power unmeasured",
      "source": "https://www.waveshare.com/wiki/1.28inch_LCD_Module",
      "note": "Measure supply current at the actual backlight setting. Previous0.25W entry was an assumption."
    },
    {
      "id": "aux2",
      "name": "Heart screen",
      "watts": null,
      "kind": "Input power unmeasured",
      "source": "https://www.waveshare.com/wiki/1.28inch_LCD_Module",
      "note": "Measure independently and with both screens running; no measured load exists here."
    },
    {
      "id": "mic",
      "name": "USB microphone",
      "watts": null,
      "kind": "Input power unmeasured",
      "source": null,
      "note": "Exact active USB consumption and startup current still required."
    },
    {
      "id": "camera",
      "name": "Camera module",
      "watts": null,
      "kind": "Input power unmeasured",
      "source": null,
      "note": "Capture resolution/frame rate and actual module current matter. Not inferred from Pi CPU rail readings."
    },
    {
      "id": "power",
      "name": "Battery, regulators, hub and future modules",
      "watts": null,
      "kind": "Hardware unselected",
      "source": null,
      "note": "Regulator and hub losses add heat. Battery temperature cannot be inferred from CPU or mixed-air temperature."
    }
  ],
  "thermal_references": [
    {
      "name": "Uncooled Pi5 on open bench",
      "idle_c": 65,
      "loaded_c": 85,
      "source": "https://www.raspberrypi.com/news/heating-and-cooling-raspberry-pi-5/",
      "note": "2023 manufacturer test: about65\u00b0C idle and sustained throttling near/above85\u00b0C. Conditions do not match Walter."
    },
    {
      "name": "Official Active Cooler on open bench",
      "idle_c": 45,
      "loaded_range_c": [
        62,
        63
      ],
      "source": "https://www.raspberrypi.com/news/heating-and-cooling-raspberry-pi-5/",
      "note": "Published test peaks, not a promised enclosure result. A HAT test stabilized around64\u00b0C. Ambient is not numerically specified in the article."
    }
  ],
  "sensor_source": "https://www.raspberrypi.com/documentation/computers/raspberry-pi.html",
  "cfd_status": {
    "solved": false,
    "reason": "OpenFOAM is installed. Both R08 mesh attempts failed extended quality checks. The independent buoyant-cavity test is recorded separately, with convergence and experimental disagreement exposed. No helmet temperature or velocity field is accepted.",
    "required": [
      "Final closed R08 geometry with actual installed hardware and routed cable solids",
      "Named cooler/fan with pressure-versus-flow curve and operating control",
      "Measured load cases including total input and branch measurements",
      "Selected shell material properties and thermal contact assumptions",
      "Mesh refinement, mass/energy balance checks and physical temperature comparison"
    ]
  }
}