{
  "$schema": "./schemas/qec-hardware-v0.1.schema.json",
  "schemaVersion": "qec-hardware-0.1",
  "machineId": "QEC-1",
  "name": "Quantum Etz Chaim Tabletop Demonstrator",
  "status": "buildable-classical-demonstrator",
  "scientificBoundary": {
    "implemented": "A deterministic classical QEC runtime with physical controls, indicators, trace display, and a versioned host-to-panel protocol.",
    "notClaimed": "The apparatus is not a quantum processor and does not produce qubit superposition, entanglement, quantum error correction, or quantum speedup.",
    "laboratoryExtension": "A future laboratory adapter may exchange versioned jobs and traces with an independently validated quantum-control backend without reclassifying QEC-1 itself as quantum hardware."
  },
  "enclosure": {
    "widthMm": 600,
    "depthMm": 420,
    "heightMm": 90,
    "panelThicknessMm": 3,
    "minimumVentAreaMm2": 2400
  },
  "compute": {
    "host": "Raspberry Pi 5",
    "recommendedMemoryGb": 8,
    "cooling": "active",
    "hostPower": "Official or equivalently certified 5 V / 5 A USB-C supply",
    "storage": "32 GB or larger high-endurance microSD; NVMe optional"
  },
  "control": {
    "controller": "Raspberry Pi Pico 2",
    "hostLink": "USB CDC serial",
    "baud": 115200,
    "frame": "UTF-8 JSON Lines",
    "logicLevelShifter": "74AHCT125 or 74HCT245",
    "gpio": {
      "pixelData": "GP2 / physical pin 4",
      "matrixRows": "GP10-GP13 / physical pins 14, 15, 16, 17",
      "matrixColumns": "GP14-GP19 / physical pins 19, 20, 21, 22, 24, 25"
    }
  },
  "panel": {
    "sefirahIndicators": 10,
    "daatBoundaryIndicators": 1,
    "pathIndicators": 22,
    "registerIndicators": 23,
    "totalAddressableIndicators": 56,
    "letterKeys": 22,
    "controlKeys": ["STEP", "RUN"],
    "alephOlamControl": "display-only and firmware-locked"
  },
  "power": {
    "domains": [
      {
        "id": "HOST_5V",
        "voltageV": 5,
        "maxCurrentA": 5,
        "source": "external certified USB-C supply",
        "loads": ["Raspberry Pi 5", "USB peripherals"]
      },
      {
        "id": "PANEL_5V",
        "voltageV": 5,
        "maxCurrentA": 5,
        "source": "external certified regulated supply",
        "loads": ["56 addressable indicators"],
        "fuseA": 5
      }
    ],
    "internalMains": false,
    "maximumTheoreticalIndicatorCurrentA": 3.36,
    "firmwareBrightnessLimitPercent": 25
  },
  "protocol": {
    "version": "qec-panel-link-0.1",
    "profile": "./qec-panel-link-v0.1.json",
    "hostOwns": [
      "program",
      "canonical state",
      "trace",
      "observation",
      "manifestation"
    ],
    "panelOwns": [
      "key scan",
      "indicator output",
      "local watchdog",
      "panel fault state"
    ],
    "hostToPanel": ["HELLO", "STATE", "RESET", "SET_BRIGHTNESS", "HEARTBEAT"],
    "panelToHost": ["READY", "KEY", "APPLIED", "FAULT", "HEARTBEAT"]
  },
  "fabrication": {
    "profile": "qec-fabrication-0.1",
    "panelMap": "./qec-panel-map-v0.1.json",
    "billOfMaterials": "./qec-bom-v0.1.json",
    "panelCutTemplate": "../schematics/qec-1-panel-cut-template.svg",
    "keySubplateTemplate": "../schematics/qec-1-key-subplate.svg",
    "guide": "../docs/QEC_1_FABRICATION_PACK.md",
    "buildTracker": "../docs/QEC_1_BUILD_TRACKER.md",
    "stopGate": "Physical QEC-1P acceptance and purchased-part scrap-fit tests must pass before final panel cutting."
  },
  "verification": [
    "No continuity between either DC rail and chassis",
    "PANEL_5V polarity verified before controller connection",
    "All 56 indicators pass low-brightness walking test",
    "Every key produces exactly one debounced event",
    "Host and panel reject incompatible protocol versions",
    "Disconnecting USB or panel power produces a visible fault without state mutation",
    "Identical source and seed reproduce the same trace hash and checksum"
  ],
  "tiers": [
    {
      "id": "QEC-1A",
      "name": "Tabletop demonstrator",
      "boundary": "Build now",
      "description": "Classical host, physical panel, deterministic QEC runtime, LEDs, keys, and trace display."
    },
    {
      "id": "QEC-1B",
      "name": "Hardware-in-the-loop controller",
      "boundary": "Optional engineering extension",
      "description": "Adds an isolated FPGA or RFSoC loopback target for timing and protocol experiments; it still does not control qubits."
    },
    {
      "id": "QEC-LAB",
      "name": "Quantum backend adapter",
      "boundary": "Laboratory only",
      "description": "Connects through a reviewed backend contract to independently operated quantum-control equipment and required RF, cryogenic, calibration, and safety systems."
    }
  ]
}