{
  "version": 2,
  "name": "Inside Boost",
  "board": {
    "rows": 8,
    "cols": 17
  },
  "cuts": [
    "1,3",
    "2,9",
    "3,2",
    "3,9",
    "4,9",
    "5,10",
    "6,6"
  ],
  "parts": [
    {
      "id": "pal01",
      "kind": "link",
      "ref": "J1",
      "pins": [
        [
          0,
          9
        ],
        [
          5,
          9
        ]
      ]
    },
    {
      "id": "pal02",
      "kind": "link",
      "ref": "J2",
      "pins": [
        [
          5,
          7
        ],
        [
          6,
          7
        ]
      ]
    },
    {
      "id": "pal03",
      "kind": "link",
      "ref": "J3",
      "pins": [
        [
          3,
          13
        ],
        [
          4,
          13
        ]
      ]
    },
    {
      "id": "pal04",
      "kind": "link",
      "ref": "J4",
      "pins": [
        [
          4,
          12
        ],
        [
          7,
          12
        ]
      ]
    },
    {
      "id": "pap01",
      "kind": "res",
      "ref": "R1",
      "value": "100k",
      "pins": [
        [
          2,
          14
        ],
        [
          5,
          14
        ]
      ],
      "device": "fixed"
    },
    {
      "id": "pap02",
      "kind": "res",
      "ref": "R2",
      "value": "100k",
      "pins": [
        [
          5,
          13
        ],
        [
          6,
          13
        ]
      ],
      "device": "fixed",
      "mount": "vertical"
    },
    {
      "id": "pap03",
      "kind": "res",
      "ref": "R3",
      "value": "1M",
      "pins": [
        [
          6,
          1
        ],
        [
          5,
          1
        ]
      ],
      "device": "fixed",
      "mount": "vertical"
    },
    {
      "id": "pap04",
      "kind": "res",
      "ref": "R4",
      "value": "1M",
      "pins": [
        [
          7,
          5
        ],
        [
          4,
          5
        ]
      ],
      "device": "fixed"
    },
    {
      "id": "pap05",
      "kind": "res",
      "ref": "R5",
      "value": "4k7",
      "pins": [
        [
          3,
          4
        ],
        [
          3,
          1
        ]
      ],
      "device": "fixed"
    },
    {
      "id": "pap06",
      "kind": "res",
      "ref": "R6",
      "value": "1k",
      "pins": [
        [
          2,
          1
        ],
        [
          1,
          1
        ]
      ],
      "device": "fixed",
      "mount": "vertical"
    },
    {
      "id": "pap07",
      "kind": "res",
      "ref": "R7",
      "value": "100k",
      "pins": [
        [
          1,
          5
        ],
        [
          0,
          5
        ]
      ],
      "device": "fixed",
      "mount": "vertical"
    },
    {
      "id": "pap08",
      "kind": "cap",
      "ref": "C1",
      "value": "100n",
      "pins": [
        [
          2,
          15
        ],
        [
          0,
          15
        ]
      ],
      "device": "ceramic disc"
    },
    {
      "id": "pap09",
      "kind": "ecap",
      "ref": "C2",
      "value": "10u",
      "pins": [
        [
          5,
          16
        ],
        [
          6,
          16
        ]
      ],
      "polarized": true
    },
    {
      "id": "pap10",
      "kind": "cap",
      "ref": "C3",
      "value": "100n",
      "pins": [
        [
          6,
          3
        ],
        [
          4,
          3
        ]
      ],
      "device": "film"
    },
    {
      "id": "pap11",
      "kind": "cap",
      "ref": "C4",
      "value": "100p",
      "pins": [
        [
          2,
          5
        ],
        [
          3,
          5
        ]
      ],
      "device": "ceramic disc"
    },
    {
      "id": "pap12",
      "kind": "ecap",
      "ref": "C5",
      "value": "10u",
      "pins": [
        [
          3,
          0
        ],
        [
          5,
          0
        ]
      ],
      "polarized": true
    },
    {
      "id": "pap13",
      "kind": "ecap",
      "ref": "C6",
      "value": "10u",
      "pins": [
        [
          1,
          2
        ],
        [
          1,
          4
        ]
      ],
      "polarized": true
    }
  ],
  "ics": [
    {
      "id": "paic1",
      "ref": "IC1",
      "part": "TL072",
      "pins": 8,
      "pin1": [
        2,
        8
      ],
      "span": 3,
      "autoCuts": [
        "2,9",
        "3,9",
        "4,9",
        "5,10"
      ]
    }
  ],
  "pads": [
    {
      "id": "pp01",
      "label": "+V",
      "at": [
        2,
        12
      ],
      "to": "the host's supply, after its power switch: 9 V, or anything up to 18 V for more headroom"
    },
    {
      "id": "pp02",
      "label": "GND",
      "at": [
        0,
        0
      ],
      "to": "the host's ground"
    },
    {
      "id": "pp03",
      "label": "IN",
      "at": [
        6,
        0
      ],
      "to": "the quiet build's output, where it used to go to the jack or the level pot"
    },
    {
      "id": "pp04",
      "label": "OUT",
      "at": [
        1,
        13
      ],
      "to": "on to the output jack tip, or lug 3 of the host's level pot"
    },
    {
      "id": "pp05",
      "label": "GAIN_A",
      "at": [
        3,
        7
      ],
      "to": "gain pot lug 1. The third lug stays empty",
      "parts": [
        {
          "id": "POT1",
          "kind": "pot",
          "lug": "1",
          "value": "A100K",
          "role": "gain"
        }
      ]
    },
    {
      "id": "pp06",
      "label": "GAIN_W",
      "at": [
        2,
        7
      ],
      "to": "gain pot wiper. Turned to zero is x1, full is about x22",
      "parts": [
        {
          "id": "POT1",
          "kind": "pot",
          "lug": "W",
          "value": "A100K",
          "role": "gain"
        }
      ]
    }
  ],
  "netlist": "# Inside Boost - written from the board\n# 8 strips of 17 holes, 17 parts, 1 chip, 7 cuts\n#\n# A TL072 gain stage that goes inside a quiet build. Op-amp B follows\n# the R1 R2 half-rail divider. Op-amp A is non-inverting around it: the\n# gain pot from OUT_A to IN- and R5 with C5 to ground make the gain\n# 1 plus pot over 4k7, from 1 to about 22. C3 and R4 bring IN in at\n# the reference, and R6, C6 and R7 take it out again with no DC on it.\n# Pins 6 and 7 are tied on purpose: the follower.\n\n+V:       @+V C1.A IC1.8 R1.A\nGND:      @GND C1.B C2.B C5.B IC1.4 R2.B R3.B R7.B\nVREF_RAW: IC1.5 C2.A R1.B R2.A\nVREF:     IC1.7 IC1.6 R4.A\nIN:       @IN C3.A R3.A\nIN+:      IC1.3 C3.B R4.B\nIN-:      IC1.2 @GAIN_A C4.B R5.A\nOUT_A:    IC1.1 @GAIN_W C4.A R6.A\nGN:       R5.B C5.A\nOUT_R:    R6.B C6.A\nOUT:      @OUT C6.B R7.A"
}