{ "version": 2, "name": "Utility LFO", "board": { "rows": 17, "cols": 20, "kind": "strip" }, "cuts": [ "4,8", "5,8", "6,8", "7,8", "8,8", "9,8", "10,8", "12,8", "13,8", "14,8", "15,8", "16,8" ], "parts": [ { "id": "ul001", "kind": "link", "ref": "J1", "pins": [ [ 7, 6 ], [ 3, 6 ] ] }, { "id": "ul002", "kind": "link", "ref": "J2", "pins": [ [ 8, 5 ], [ 2, 5 ] ] }, { "id": "ul003", "kind": "link", "ref": "J3", "pins": [ [ 7, 12 ], [ 1, 12 ] ] }, { "id": "ul004", "kind": "link", "ref": "J4", "pins": [ [ 6, 14 ], [ 2, 14 ] ] }, { "id": "ul005", "kind": "link", "ref": "J5", "pins": [ [ 9, 16 ], [ 2, 16 ] ] }, { "id": "ul006", "kind": "link", "ref": "J6", "pins": [ [ 8, 15 ], [ 16, 15 ] ] }, { "id": "ul007", "kind": "link", "ref": "J7", "pins": [ [ 9, 0 ], [ 12, 0 ] ] }, { "id": "ul008", "kind": "link", "ref": "J8", "pins": [ [ 10, 6 ], [ 11, 6 ] ] }, { "id": "ul009", "kind": "link", "ref": "J9", "pins": [ [ 4, 17 ], [ 12, 17 ] ] }, { "kind": "res", "value": "10k", "device": "fixed", "mount": "vertical", "id": "ul010", "ref": "R3", "pins": [ [ 3, 11 ], [ 2, 11 ] ] }, { "kind": "res", "value": "10k", "device": "fixed", "mount": "vertical", "id": "ul011", "ref": "R4", "pins": [ [ 2, 13 ], [ 1, 13 ] ] }, { "kind": "ecap", "value": "47u", "polarized": true, "id": "ul012", "ref": "C3", "pins": [ [ 2, 15 ], [ 1, 15 ] ] }, { "kind": "cap", "value": "100n", "device": "ceramic disc", "id": "ul013", "ref": "C2", "pins": [ [ 3, 17 ], [ 1, 17 ] ] }, { "kind": "cap", "value": "1u", "device": "box film", "id": "ul014", "ref": "C1", "pins": [ [ 10, 3 ], [ 12, 3 ] ] }, { "kind": "res", "value": "47k", "device": "fixed", "id": "ul015", "ref": "R1", "pins": [ [ 15, 4 ], [ 12, 4 ] ] }, { "kind": "res", "value": "68k", "device": "fixed", "id": "ul016", "ref": "R2", "pins": [ [ 11, 12 ], [ 16, 12 ] ] }, { "kind": "res", "value": "100k", "device": "fixed", "id": "ul017", "ref": "R5", "pins": [ [ 10, 11 ], [ 16, 11 ] ] }, { "kind": "ecap", "value": "10u NP", "polarized": true, "id": "ul018", "ref": "C4", "pins": [ [ 12, 1 ], [ 13, 1 ] ] }, { "kind": "res", "value": "100k", "device": "fixed", "id": "ul019", "ref": "R13", "pins": [ [ 10, 13 ], [ 5, 13 ] ] }, { "kind": "res", "value": "68k", "device": "fixed", "mount": "vertical", "id": "ul020", "ref": "R14", "pins": [ [ 4, 15 ], [ 5, 15 ] ] }, { "kind": "res", "value": "1k", "device": "fixed", "mount": "vertical", "id": "ul021", "ref": "R8", "pins": [ [ 12, 18 ], [ 13, 18 ] ] }, { "kind": "res", "value": "2k2", "device": "fixed", "id": "ul022", "ref": "R9", "pins": [ [ 10, 14 ], [ 14, 14 ] ] }, { "kind": "res", "value": "10k", "device": "fixed", "id": "ul023", "ref": "R10", "pins": [ [ 10, 4 ], [ 6, 4 ] ] }, { "kind": "diode", "value": "1N4148", "polarized": true, "device": "switching", "id": "ul024", "ref": "D1", "pins": [ [ 6, 3 ], [ 2, 3 ] ] }, { "kind": "diode", "value": "1N4148", "polarized": true, "device": "switching", "id": "ul025", "ref": "D2", "pins": [ [ 2, 2 ], [ 6, 2 ] ] }, { "kind": "res", "value": "10k", "device": "fixed", "id": "ul026", "ref": "R11", "pins": [ [ 5, 1 ], [ 2, 1 ] ] }, { "kind": "res", "value": "27k", "device": "fixed", "mount": "vertical", "id": "ul027", "ref": "R12", "pins": [ [ 4, 4 ], [ 5, 4 ] ] }, { "kind": "res", "value": "1k", "device": "fixed", "id": "ul028", "ref": "R15", "pins": [ [ 4, 0 ], [ 0, 0 ] ] }, { "kind": "res", "value": "1k", "device": "fixed", "id": "ul029", "ref": "R6", "pins": [ [ 11, 5 ], [ 14, 5 ] ] } ], "ics": [ { "id": "ulic1", "ref": "IC1", "part": "TL074", "pins": 14, "pin1": [ 4, 7 ], "span": 3, "autoCuts": [ "4,8", "5,8", "6,8", "7,8", "8,8", "9,8", "10,8" ] } ], "pads": [ { "id": "ulp01", "label": "V+", "at": [ 3, 19 ], "to": "battery + via the SPST power toggle. 9 V; 12 V is fine too", "parts": [ { "id": "SW4", "kind": "toggle", "lug": "C", "value": "SPST", "role": "power" } ] }, { "id": "ulp02", "label": "GND", "at": [ 1, 19 ], "to": "battery -, and the output jack sleeve", "parts": [ { "id": "DC1", "kind": "dc", "lug": "-", "value": "9 V" }, { "id": "JK1", "kind": "jack", "lug": "S", "value": "1/4 in" } ] }, { "id": "ulp03", "label": "BIAS_P", "at": [ 2, 19 ], "to": "the half rail, for the LEVEL pot's bottom lug: turned down, the output parks here", "parts": [ { "id": "POT2", "kind": "pot", "lug": "1", "value": "B100K", "role": "level" } ] }, { "id": "ulp04", "label": "SQ", "at": [ 10, 19 ], "to": "the square, raw, about +/-3.3 V. RATE pot lug 3 - the square end of the variable resistor", "parts": [ { "id": "POT1", "kind": "pot", "lug": "3", "value": "B1M", "role": "rate" } ] }, { "id": "ulp05", "label": "TRI", "at": [ 10, 1 ], "to": "the triangle. RANGE toggle, one side: closed, C4 sits across C1 and the sweep is ten times slower", "parts": [ { "id": "SW3", "kind": "toggle", "lug": "1", "value": "SPST", "role": "range" } ] }, { "id": "ulp06", "label": "RANGE_C", "at": [ 13, 0 ], "to": "RANGE toggle, other side: C4's free leg", "parts": [ { "id": "SW3", "kind": "toggle", "lug": "C", "value": "SPST", "role": "range" } ] }, { "id": "ulp07", "label": "RATE_W", "at": [ 15, 0 ], "to": "RATE pot wiper", "parts": [ { "id": "POT1", "kind": "pot", "lug": "W", "value": "B1M", "role": "rate" } ] }, { "id": "ulp08", "label": "SINE", "at": [ 0, 3 ], "to": "the sine through 1k, about +/-2.2 V. SW2 lug 1", "parts": [ { "id": "SW2", "kind": "toggle", "lug": "1", "value": "SPDT", "role": "sine" } ] }, { "id": "ulp09", "label": "TRI_OUT", "at": [ 14, 0 ], "to": "the triangle through 1k, about +/-2.2 V. SW1 lug 1", "parts": [ { "id": "SW1", "kind": "toggle", "lug": "1", "value": "SPDT", "role": "wave: tri, square" } ] }, { "id": "ulp10", "label": "SQ_OUT", "at": [ 13, 19 ], "to": "the square, scaled, through 1k, about +/-2.2 V. SW1 lug 2", "parts": [ { "id": "SW1", "kind": "toggle", "lug": "2", "value": "SPDT", "role": "wave: tri, square" } ] }, { "id": "ulp11", "label": "LED_A", "at": [ 14, 19 ], "to": "rate LED anode, through R9", "parts": [ { "id": "LED1", "kind": "led", "lug": "A", "value": "panel", "role": "rate" } ] }, { "id": "ulp12", "label": "LED_K", "at": [ 1, 18 ], "to": "rate LED cathode", "parts": [ { "id": "LED1", "kind": "led", "lug": "K", "value": "panel", "role": "rate" } ] } ], "netlist": "# Utility LFO - written from the board\n# 17 strips of 20 holes, 29 parts, 1 chip, 12 cuts\n#\n# This is the circuit as the copper currently has it. Checking the board\n# against it can only pass - its use is to carry the circuit somewhere else.\n\nV+: @V+ IC1.4 R3.A C2.A\n\nGND: @GND @LED_K IC1.11 R4.B C3.B C2.B\n\nSINE: @SINE R15.B\nBIAS_P: @BIAS_P IC1.5 IC1.9 IC1.12 R3.B R4.A C3.A D1.B D2.A R11.B\nIC1_OUTA: IC1.1 R12.A R15.A\nIC1_OUTD: IC1.14 R14.A R8.A\nIC1_INA: IC1.2 R11.A R12.B\nIC1_IND: IC1.13 R13.B R14.B\nIC1_INA_2: IC1.3 R10.B D1.A D2.B\nIC1_INC: IC1.10 R2.B R5.B\nIC1_INB: IC1.6 C1.B R1.B C4.A\nTRI: @TRI IC1.7 C1.A R2.A R10.A R6.A\nSQ: @SQ IC1.8 R5.A R13.A R9.A\nRANGE_C: @RANGE_C C4.B\nSQ_OUT: @SQ_OUT R8.B\nTRI_OUT: @TRI_OUT R6.B\nLED_A: @LED_A R9.B\nRATE_W: @RATE_W R1.A", "offboard": [ "SW1.C - SW2.2", "SW2.C - POT2.3", "POT2.W - JK1.T", "DC1.+ - SW4.1" ] }