{
  "title": "Crank / cam Hall input",
  "source": "IO_MODULES/ENGINE_POSITION_INPUTS.md: Electrical interface",
  "reference_scope": "documentation only",
  "components": [
    {
      "ref": "J",
      "kind": "port",
      "pins": [
        "P"
      ],
      "value": "TRIG_x"
    },
    {
      "ref": "V",
      "kind": "port",
      "pins": [
        "P"
      ],
      "value": "+12V_SENS"
    },
    {
      "ref": "R_PULLUP",
      "kind": "resistor",
      "pins": [
        "1",
        "2"
      ],
      "value": "R_PULLUP\n4.7 k\u03a9 provision"
    },
    {
      "ref": "CLAMP",
      "kind": "transient-protection",
      "pins": [
        "SIG",
        "RET"
      ],
      "value": "Harness clamp / ratings TBD"
    },
    {
      "ref": "GC",
      "kind": "ground-port",
      "pins": [
        "P"
      ],
      "value": "SENSOR_GND"
    },
    {
      "ref": "R_DIV_TOP",
      "kind": "resistor",
      "pins": [
        "1",
        "2"
      ],
      "value": "R_DIV_TOP"
    },
    {
      "ref": "R_DIV_BOTTOM",
      "kind": "resistor",
      "pins": [
        "1",
        "2"
      ],
      "value": "R_DIV_BOTTOM"
    },
    {
      "ref": "GB",
      "kind": "ground-port",
      "pins": [
        "P"
      ],
      "value": "SENSOR_GND"
    },
    {
      "ref": "C_FILTER",
      "kind": "capacitor",
      "pins": [
        "1",
        "2"
      ],
      "value": "C_FILTER\n1 nF initial"
    },
    {
      "ref": "GF",
      "kind": "ground-port",
      "pins": [
        "P"
      ],
      "value": "SENSOR_GND"
    },
    {
      "ref": "U",
      "kind": "schmitt-buffer",
      "pins": [
        "IN",
        "OUT"
      ],
      "value": "SN74LVC2G17-Q1"
    },
    {
      "ref": "MCU",
      "kind": "port",
      "pins": [
        "P"
      ],
      "value": "TIMER_3V3"
    }
  ],
  "nets": [
    {
      "name": "TRIG_x",
      "connections": [
        "J.P",
        "R_PULLUP.2",
        "CLAMP.SIG",
        "R_DIV_TOP.1"
      ]
    },
    {
      "name": "+12V_SENS",
      "connections": [
        "V.P",
        "R_PULLUP.1"
      ]
    },
    {
      "name": "SENSOR_GND",
      "connections": [
        "CLAMP.RET",
        "GC.P",
        "R_DIV_BOTTOM.2",
        "GB.P",
        "C_FILTER.2",
        "GF.P"
      ]
    },
    {
      "name": "DIVIDED",
      "connections": [
        "R_DIV_TOP.2",
        "R_DIV_BOTTOM.1",
        "C_FILTER.1",
        "U.IN"
      ]
    },
    {
      "name": "TIMER_3V3",
      "connections": [
        "U.OUT",
        "MCU.P"
      ]
    }
  ],
  "no_connects": []
}