{
 "version": 2,
 "name": "Mixer Rack",
 "board": {
  "rows": 18,
  "cols": 16,
  "kind": "strip"
 },
 "cuts": [
  "7,7",
  "8,7",
  "9,7",
  "10,7",
  "11,7",
  "13,7"
 ],
 "parts": [
  {
   "kind": "diode",
   "value": "1N5817",
   "polarized": true,
   "device": "schottky",
   "mount": "vertical",
   "id": "mx001",
   "ref": "D1",
   "pins": [
    [
     1,
     12
    ],
    [
     0,
     12
    ]
   ]
  },
  {
   "kind": "diode",
   "value": "1N5817",
   "polarized": true,
   "device": "schottky",
   "mount": "vertical",
   "id": "mx002",
   "ref": "D2",
   "pins": [
    [
     6,
     12
    ],
    [
     5,
     12
    ]
   ]
  },
  {
   "id": "mx003",
   "kind": "link",
   "ref": "J1",
   "pins": [
    [
     2,
     4
    ],
    [
     3,
     4
    ]
   ]
  },
  {
   "id": "mx004",
   "kind": "link",
   "ref": "J2",
   "pins": [
    [
     3,
     9
    ],
    [
     4,
     9
    ]
   ]
  },
  {
   "kind": "ecap",
   "value": "10u",
   "polarized": true,
   "id": "mx005",
   "ref": "C1",
   "pins": [
    [
     0,
     7
    ],
    [
     2,
     7
    ]
   ]
  },
  {
   "kind": "ecap",
   "value": "10u",
   "polarized": true,
   "id": "mx006",
   "ref": "C2",
   "pins": [
    [
     6,
     7
    ],
    [
     4,
     7
    ]
   ]
  },
  {
   "id": "mx007",
   "kind": "link",
   "ref": "J3",
   "pins": [
    [
     0,
     10
    ],
    [
     7,
     10
    ]
   ]
  },
  {
   "id": "mx008",
   "kind": "link",
   "ref": "J4",
   "pins": [
    [
     6,
     3
    ],
    [
     10,
     3
    ]
   ]
  },
  {
   "id": "mx009",
   "kind": "link",
   "ref": "J5",
   "pins": [
    [
     4,
     4
    ],
    [
     9,
     4
    ]
   ]
  },
  {
   "id": "mx010",
   "kind": "link",
   "ref": "J6",
   "pins": [
    [
     10,
     13
    ],
    [
     4,
     13
    ]
   ]
  },
  {
   "id": "mx011",
   "kind": "link",
   "ref": "J7",
   "pins": [
    [
     8,
     1
    ],
    [
     12,
     1
    ]
   ]
  },
  {
   "id": "mx012",
   "kind": "link",
   "ref": "J8",
   "pins": [
    [
     9,
     14
    ],
    [
     14,
     14
    ]
   ]
  },
  {
   "id": "mx013",
   "kind": "link",
   "ref": "J9",
   "pins": [
    [
     7,
     0
    ],
    [
     15,
     0
    ]
   ]
  },
  {
   "id": "mx014",
   "kind": "link",
   "ref": "J10",
   "pins": [
    [
     8,
     15
    ],
    [
     16,
     15
    ]
   ]
  },
  {
   "kind": "res",
   "value": "100k",
   "device": "fixed",
   "mount": "vertical",
   "id": "mx015",
   "ref": "R1",
   "pins": [
    [
     11,
     5
    ],
    [
     12,
     5
    ]
   ]
  },
  {
   "kind": "res",
   "value": "100k",
   "device": "fixed",
   "mount": "vertical",
   "id": "mx016",
   "ref": "R2",
   "pins": [
    [
     11,
     11
    ],
    [
     12,
     11
    ]
   ]
  },
  {
   "kind": "res",
   "value": "100k",
   "device": "fixed",
   "mount": "vertical",
   "id": "mx017",
   "ref": "R3",
   "pins": [
    [
     13,
     3
    ],
    [
     12,
     3
    ]
   ]
  },
  {
   "kind": "res",
   "value": "100k",
   "device": "fixed",
   "mount": "vertical",
   "id": "mx018",
   "ref": "R4",
   "pins": [
    [
     13,
     12
    ],
    [
     12,
     12
    ]
   ]
  },
  {
   "kind": "res",
   "value": "100k",
   "device": "fixed",
   "mount": "vertical",
   "id": "mx019",
   "ref": "R5",
   "pins": [
    [
     8,
     5
    ],
    [
     7,
     5
    ]
   ]
  },
  {
   "kind": "res",
   "value": "100k",
   "device": "fixed",
   "mount": "vertical",
   "id": "mx020",
   "ref": "R6",
   "pins": [
    [
     15,
     2
    ],
    [
     14,
     2
    ]
   ]
  },
  {
   "kind": "res",
   "value": "100k",
   "device": "fixed",
   "mount": "vertical",
   "id": "mx021",
   "ref": "R7",
   "pins": [
    [
     8,
     11
    ],
    [
     9,
     11
    ]
   ]
  },
  {
   "kind": "res",
   "value": "1k",
   "device": "fixed",
   "mount": "vertical",
   "id": "mx022",
   "ref": "R8",
   "pins": [
    [
     16,
     13
    ],
    [
     17,
     13
    ]
   ]
  }
 ],
 "ics": [
  {
   "id": "mxic1",
   "ref": "IC1",
   "part": "TL072",
   "pins": 8,
   "pin1": [
    7,
    6
   ],
   "span": 3,
   "autoCuts": [
    "7,7",
    "8,7",
    "9,7",
    "10,7"
   ]
  }
 ],
 "pads": [
  {
   "id": "mxp01",
   "label": "H1",
   "at": [
    5,
    1
   ],
   "to": "power header pin 1: -12 V. The cable's RED STRIPE is this end"
  },
  {
   "id": "mxp02",
   "label": "H2",
   "at": [
    5,
    2
   ],
   "to": "power header pin 2: -12 V. The cable's RED STRIPE is this end"
  },
  {
   "id": "mxp03",
   "label": "H3",
   "at": [
    4,
    1
   ],
   "to": "power header pin 3: ground"
  },
  {
   "id": "mxp04",
   "label": "H4",
   "at": [
    4,
    2
   ],
   "to": "power header pin 4: ground"
  },
  {
   "id": "mxp05",
   "label": "H5",
   "at": [
    3,
    1
   ],
   "to": "power header pin 5: ground"
  },
  {
   "id": "mxp06",
   "label": "H6",
   "at": [
    3,
    2
   ],
   "to": "power header pin 6: ground"
  },
  {
   "id": "mxp07",
   "label": "H7",
   "at": [
    2,
    1
   ],
   "to": "power header pin 7: ground"
  },
  {
   "id": "mxp08",
   "label": "H8",
   "at": [
    2,
    2
   ],
   "to": "power header pin 8: ground"
  },
  {
   "id": "mxp09",
   "label": "H9",
   "at": [
    1,
    1
   ],
   "to": "power header pin 9: +12 V"
  },
  {
   "id": "mxp10",
   "label": "H10",
   "at": [
    1,
    2
   ],
   "to": "power header pin 10: +12 V"
  },
  {
   "id": "mxp11",
   "label": "W1",
   "at": [
    11,
    4
   ],
   "to": "level pot 1 wiper. Lug 3 is the channel 1 jack tip, lug 1 is GND_P"
  },
  {
   "id": "mxp12",
   "label": "W2",
   "at": [
    11,
    9
   ],
   "to": "level pot 2 wiper"
  },
  {
   "id": "mxp13",
   "label": "W3",
   "at": [
    13,
    4
   ],
   "to": "level pot 3 wiper"
  },
  {
   "id": "mxp14",
   "label": "W4",
   "at": [
    13,
    9
   ],
   "to": "level pot 4 wiper"
  },
  {
   "id": "mxp15",
   "label": "GND_P",
   "at": [
    4,
    15
   ],
   "to": "ground for the panel: every pot's lug 1, every jack sleeve"
  },
  {
   "id": "mxp16",
   "label": "OUT",
   "at": [
    17,
    10
   ],
   "to": "output jack tip - the mix, in phase, through 1k"
  }
 ],
 "netlist": "# Mixer Rack - written from the board\n# 18 strips of 16 holes, 22 parts, 1 chip, 6 cuts\n#\n# Four level-pot wipers through 100k each into SUM, the inverting input of\n# op-amp A with 100k feedback; op-amp B inverts it back (100k / 100k) and\n# drives OUT through 1k. 2x5 power header H1-H10, red stripe at H1/H2 on\n# strip 5; a 1N5817 on each rail. No regulator - nothing here needs 5 V.\n\n-12_RAW:   @H1 @H2 D2.B\n-12:       D2.A C2.A IC1.4 J4.A J4.B\n+12_RAW:   @H9 @H10 D1.A\n+12:       D1.B C1.A IC1.8 J3.A J3.B\nGND:       @H3 @H4 @H5 @H6 @H7 @H8 J1.A J1.B J2.A J2.B C1.B C2.B IC1.3 IC1.5 J5.A J5.B J6.A J6.B @GND_P\nSUM:       IC1.2 J7.A J7.B R1.B R2.B R3.B R4.B R5.A\nOUT_A:     IC1.1 J9.A J9.B R5.B R6.A\nINV_IN:    IC1.6 J8.A J8.B R6.B R7.B\nOUT_B:     IC1.7 J10.A J10.B R7.A R8.A\nOUT:       R8.B @OUT\nW1:        R1.A @W1\nW2:        R2.A @W2\nW3:        R3.A @W3\nW4:        R4.A @W4\n"
}