{
 "version": 2,
 "name": "Optical Tremolo",
 "board": {
  "rows": 14,
  "cols": 30,
  "kind": "strip"
 },
 "cuts": [
  "2,5",
  "3,5",
  "4,5",
  "5,5",
  "0,27",
  "3,17",
  "5,12",
  "7,12",
  "8,8",
  "11,4"
 ],
 "parts": [
  {
   "id": "ot01trm",
   "kind": "link",
   "ref": "J1",
   "pins": [
    [
     2,
     2
    ],
    [
     1,
     2
    ]
   ]
  },
  {
   "id": "ot02trm",
   "kind": "link",
   "ref": "J2",
   "pins": [
    [
     2,
     9
    ],
    [
     0,
     9
    ]
   ]
  },
  {
   "id": "ot03trm",
   "kind": "link",
   "ref": "J3",
   "pins": [
    [
     3,
     3
    ],
    [
     6,
     3
    ]
   ]
  },
  {
   "id": "ot04trm",
   "kind": "link",
   "ref": "J4",
   "pins": [
    [
     4,
     8
    ],
    [
     6,
     8
    ]
   ]
  },
  {
   "id": "ot05trm",
   "kind": "link",
   "ref": "J5",
   "pins": [
    [
     5,
     1
    ],
    [
     0,
     1
    ]
   ]
  },
  {
   "id": "ot06trm",
   "kind": "link",
   "ref": "J6",
   "pins": [
    [
     7,
     24
    ],
    [
     0,
     24
    ]
   ]
  },
  {
   "id": "ot07trm",
   "kind": "link",
   "ref": "J7",
   "pins": [
    [
     7,
     0
    ],
    [
     1,
     0
    ]
   ]
  },
  {
   "id": "ot08trm",
   "kind": "link",
   "ref": "J8",
   "pins": [
    [
     10,
     7
    ],
    [
     7,
     7
    ]
   ]
  },
  {
   "id": "ot09trm",
   "kind": "res",
   "ref": "R1",
   "value": "10k",
   "pins": [
    [
     2,
     11
    ],
    [
     3,
     11
    ]
   ],
   "device": "fixed",
   "mount": "vertical"
  },
  {
   "id": "ot10trm",
   "kind": "res",
   "ref": "R2",
   "value": "10k",
   "pins": [
    [
     3,
     18
    ],
    [
     4,
     18
    ]
   ],
   "device": "fixed",
   "mount": "vertical"
  },
  {
   "id": "ot11trm",
   "kind": "res",
   "ref": "R3",
   "value": "2k2",
   "pins": [
    [
     4,
     2
    ],
    [
     8,
     2
    ]
   ],
   "device": "fixed"
  },
  {
   "id": "ot12trm",
   "kind": "res",
   "ref": "R4",
   "value": "470R",
   "pins": [
    [
     8,
     20
    ],
    [
     9,
     20
    ]
   ],
   "device": "fixed",
   "mount": "vertical"
  },
  {
   "id": "ot13trm",
   "kind": "res",
   "ref": "R5",
   "value": "10k",
   "pins": [
    [
     11,
     8
    ],
    [
     12,
     8
    ]
   ],
   "device": "fixed",
   "mount": "vertical"
  },
  {
   "id": "ot14trm",
   "kind": "res",
   "ref": "R6",
   "value": "1M",
   "pins": [
    [
     13,
     26
    ],
    [
     10,
     26
    ]
   ],
   "device": "fixed"
  },
  {
   "id": "ot15trm",
   "kind": "ecap",
   "ref": "C1",
   "value": "4u7",
   "pins": [
    [
     6,
     10
    ],
    [
     7,
     10
    ]
   ],
   "polarized": true
  },
  {
   "id": "ot16trm",
   "kind": "cap",
   "ref": "C2",
   "value": "100n",
   "pins": [
    [
     5,
     9
    ],
    [
     7,
     9
    ]
   ],
   "device": "ceramic disc"
  },
  {
   "id": "ot17trm",
   "kind": "cap",
   "ref": "C3",
   "value": "1u",
   "pins": [
    [
     11,
     3
    ],
    [
     11,
     5
    ]
   ],
   "device": "ceramic disc"
  },
  {
   "id": "ot18trm",
   "kind": "cap",
   "ref": "C4",
   "value": "1u",
   "pins": [
    [
     12,
     14
    ],
    [
     13,
     14
    ]
   ],
   "device": "ceramic disc"
  },
  {
   "id": "ot19trm",
   "kind": "ecap",
   "ref": "C5",
   "value": "100u",
   "pins": [
    [
     0,
     22
    ],
    [
     1,
     22
    ]
   ],
   "polarized": true
  },
  {
   "id": "ot20trm",
   "kind": "diode",
   "ref": "D1",
   "value": "1N5817",
   "pins": [
    [
     0,
     28
    ],
    [
     0,
     25
    ]
   ],
   "polarized": true,
   "device": "schottky"
  },
  {
   "id": "ot21trm",
   "kind": "trans",
   "ref": "Q1",
   "value": "",
   "device": "2N7000",
   "pins": [
    [
     5,
     14
    ],
    [
     6,
     14
    ],
    [
     7,
     14
    ]
   ]
  }
 ],
 "ics": [
  {
   "id": "otic1",
   "ref": "IC1",
   "part": "NE555",
   "pins": 8,
   "pin1": [
    2,
    4
   ],
   "span": 3,
   "autoCuts": [
    "2,5",
    "3,5",
    "4,5",
    "5,5"
   ]
  }
 ],
 "pads": [
  {
   "id": "otp01",
   "label": "9V",
   "at": [
    0,
    29
   ],
   "to": "DC jack tip or battery +, 9 V, center positive, through the power toggle"
  },
  {
   "id": "otp02",
   "label": "+9V",
   "at": [
    0,
    2
   ],
   "to": "test point on the protected rail; nothing leaves the board here. It also tells the checker this strip is a supply"
  },
  {
   "id": "otp03",
   "label": "GND",
   "at": [
    1,
    10
   ],
   "to": "ground: battery -, both jack sleeves, the rate LED cathode"
  },
  {
   "id": "otp04",
   "label": "IN",
   "at": [
    11,
    0
   ],
   "to": "input jack tip"
  },
  {
   "id": "otp05",
   "label": "OUT",
   "at": [
    13,
    29
   ],
   "to": "output jack tip"
  },
  {
   "id": "otp06",
   "label": "RATE_A",
   "at": [
    3,
    16
   ],
   "to": "rate pot, one outer lug"
  },
  {
   "id": "otp07",
   "label": "RATE_W",
   "at": [
    3,
    21
   ],
   "to": "rate pot wiper (tie the unused lug to it)"
  },
  {
   "id": "otp08",
   "label": "DEPTH_A",
   "at": [
    5,
    17
   ],
   "to": "depth pot, one outer lug"
  },
  {
   "id": "otp09",
   "label": "DEPTH_W",
   "at": [
    8,
    18
   ],
   "to": "depth pot wiper (tie the unused lug to it)"
  },
  {
   "id": "otp10",
   "label": "IND_A",
   "at": [
    8,
    5
   ],
   "to": "panel LED anode - blinks at the rate. Cathode to GND"
  },
  {
   "id": "otp11",
   "label": "VLED_A",
   "at": [
    9,
    23
   ],
   "to": "the vactrol LED, anode. Seal this LED against the cell"
  },
  {
   "id": "otp12",
   "label": "VLED_K",
   "at": [
    10,
    23
   ],
   "to": "the vactrol LED, cathode"
  },
  {
   "id": "otp13",
   "label": "LDR_1",
   "at": [
    12,
    1
   ],
   "to": "the cell, one leg - it shunts the signal node"
  },
  {
   "id": "otp14",
   "label": "LDR_2",
   "at": [
    10,
    1
   ],
   "to": "the cell, other leg - ground"
  }
 ],
 "netlist": "# Optical Tremolo - written from the board\n# 14 strips of 30 holes, 21 parts, 1 chip, 10 cuts\n#\n# The 555 is the LFO. Q1 lifts the triangle off the timing cap and drives the\n# vactrol LED through the depth pot; the cell shunts the signal node behind R5.\n# The square out blinks a panel LED through R3 so the box shows its rate.\n\n9V:      @9V D1.A\n+9:      D1.B R1.A C5.A Q1.D IC1.4 IC1.8 @+9V J2.A J2.B J5.A J5.B J6.A J6.B\nGND:     @GND R6.B C1.B C2.B C5.B IC1.1 @VLED_K @LDR_2 J1.A J1.B J7.A J7.B J8.A J8.B\nLFO:     IC1.2 R2.B C1.A Q1.G IC1.6 J3.A J3.B J4.A J4.B\nDIS:     IC1.7 R1.B @RATE_A\nRATE_W:  @RATE_W R2.A\nCTRL:    IC1.5 C2.A\nSQUARE:  IC1.3 R3.A\nIND:     @IND_A R3.B\nSRC:     Q1.S @DEPTH_A\nDEPTH_W: @DEPTH_W R4.A\nVLED:    @VLED_A R4.B\nIN:      @IN C3.A\nIN_AC:   C3.B R5.A\nNODE:    R5.B C4.A @LDR_1\nOUT:     @OUT R6.A C4.B\n"
}