{ "version": 2, "name": "Grub Divider Mk II", "board": { "rows": 16, "cols": 17, "kind": "strip" }, "cuts": [ "1,8", "2,8", "3,8", "4,8", "5,8", "6,8", "7,8", "0,12", "0,2", "0,5", "1,13", "3,4", "4,4", "5,4", "6,4", "3,13", "4,13", "6,13", "10,9", "11,9", "12,9", "13,9", "11,3", "14,3" ], "parts": [ { "id": "d01lk", "kind": "link", "ref": "J1", "value": "", "pins": [ [ 7, 5 ], [ 8, 5 ] ] }, { "id": "d02lk", "kind": "link", "ref": "J2", "value": "", "pins": [ [ 1, 16 ], [ 8, 16 ] ] }, { "id": "d03pt", "kind": "cap", "ref": "C1", "value": "100n", "pins": [ [ 1, 12 ], [ 1, 14 ] ], "device": "ceramic disc" }, { "id": "d04pt", "kind": "ecap", "ref": "C2", "value": "10u", "pins": [ [ 0, 4 ], [ 0, 6 ] ], "polarized": true }, { "id": "d05pt", "kind": "res", "ref": "R1", "value": "1M", "pins": [ [ 3, 11 ], [ 3, 14 ] ], "device": "fixed" }, { "id": "d06pt", "kind": "res", "ref": "R2", "value": "470k", "pins": [ [ 4, 11 ], [ 4, 14 ] ], "device": "fixed" }, { "id": "d07pt", "kind": "res", "ref": "R3", "value": "220k", "pins": [ [ 6, 11 ], [ 6, 14 ] ], "device": "fixed" }, { "id": "d08pt", "kind": "res", "ref": "R4", "value": "100k", "pins": [ [ 6, 6 ], [ 6, 3 ] ], "device": "fixed" }, { "id": "d09pt", "kind": "res", "ref": "R5", "value": "47k", "pins": [ [ 5, 6 ], [ 5, 3 ] ], "device": "fixed" }, { "id": "d10pt", "kind": "res", "ref": "R6", "value": "22k", "pins": [ [ 4, 6 ], [ 4, 3 ] ], "device": "fixed" }, { "id": "d11pt", "kind": "res", "ref": "R7", "value": "10k", "pins": [ [ 3, 6 ], [ 3, 3 ] ], "device": "fixed" }, { "id": "d12pt", "kind": "res", "ref": "R8", "value": "100k", "pins": [ [ 1, 0 ], [ 7, 0 ] ], "device": "fixed" }, { "id": "d13pt", "kind": "res", "ref": "R9", "value": "100k", "pins": [ [ 2, 1 ], [ 7, 1 ] ], "device": "fixed" }, { "id": "d14pt", "kind": "res", "ref": "R10", "value": "1k", "pins": [ [ 0, 11 ], [ 0, 14 ] ], "device": "fixed" }, { "id": "gm01pre", "kind": "link", "ref": "J3", "value": "", "pins": [ [ 8, 1 ], [ 13, 1 ] ] }, { "id": "gm02pre", "kind": "res", "ref": "R14", "value": "100k", "pins": [ [ 9, 16 ], [ 10, 16 ] ], "device": "fixed", "mount": "vertical" }, { "id": "gm03pre", "kind": "res", "ref": "R15", "value": "100k", "pins": [ [ 8, 12 ], [ 9, 12 ] ], "device": "fixed", "mount": "vertical" }, { "id": "gm04pre", "kind": "ecap", "ref": "C5", "value": "10u", "pins": [ [ 9, 4 ], [ 8, 4 ] ], "polarized": true }, { "id": "gm05pre", "kind": "cap", "ref": "C6", "value": "100n", "pins": [ [ 8, 14 ], [ 10, 14 ] ], "device": "ceramic disc" }, { "id": "gm06pre", "kind": "link", "ref": "J4", "value": "", "pins": [ [ 11, 12 ], [ 12, 12 ] ] }, { "id": "gm07pre", "kind": "link", "ref": "J5", "value": "", "pins": [ [ 9, 13 ], [ 13, 13 ] ] }, { "id": "gm08pre", "kind": "cap", "ref": "C3", "value": "100n", "pins": [ [ 14, 2 ], [ 12, 2 ] ], "device": "film" }, { "id": "gm09pre", "kind": "res", "ref": "R11", "value": "1M", "pins": [ [ 9, 6 ], [ 12, 6 ] ], "device": "fixed" }, { "id": "gm10pre", "kind": "res", "ref": "R12", "value": "100k", "pins": [ [ 10, 7 ], [ 11, 7 ] ], "device": "fixed", "mount": "vertical" }, { "id": "gm11pre", "kind": "res", "ref": "R13", "value": "1k", "pins": [ [ 11, 5 ], [ 14, 5 ] ], "device": "fixed" }, { "id": "gm12pre", "kind": "ecap", "ref": "C4", "value": "10u", "pins": [ [ 14, 7 ], [ 15, 7 ] ], "polarized": true }, { "id": "gm13pre", "kind": "cap", "ref": "C7", "value": "2n2", "pins": [ [ 11, 2 ], [ 11, 4 ] ], "device": "ceramic disc" } ], "ics": [ { "id": "dic1aa", "ref": "IC1", "part": "CD4024", "pins": 14, "pin1": [ 1, 7 ], "span": 3 }, { "id": "gmic2", "ref": "IC2", "part": "TL072", "pins": 8, "pin1": [ 10, 8 ], "span": 3 } ], "pads": [ { "id": "gmp01", "label": "V+", "at": [ 1, 11 ], "to": "battery + via the SPST toggle", "parts": [ { "id": "SW8", "kind": "toggle", "lug": "C", "value": "SPST", "role": "power" } ] }, { "id": "gmp02", "label": "OUT_S", "at": [ 1, 15 ], "to": "output jack sleeve", "parts": [ { "id": "JK1", "kind": "jack", "lug": "S", "value": "1/4 in" } ] }, { "id": "gmp03", "label": "VOL_G", "at": [ 8, 13 ], "to": "volume pot, bottom lug", "parts": [ { "id": "POT1", "kind": "pot", "lug": "1", "value": "B100K", "role": "volume" } ] }, { "id": "gmp04", "label": "GND", "at": [ 8, 0 ], "to": "battery -", "parts": [ { "id": "DC1", "kind": "dc", "lug": "-", "value": "9 V" }, { "id": "JK2", "kind": "jack", "lug": "S", "value": "1/4 in" } ] }, { "id": "gmp05", "label": "CLK_IN", "at": [ 1, 2 ], "to": "the divider's input - PRE_OUT lands here, off the board. A bypass switch here picks the preamp or a raw input" }, { "id": "gmp06", "label": "MR_PAD", "at": [ 2, 2 ], "to": "reset - leave open for clean octaves, or jumper any SWn_A here for odd division and looping patterns" }, { "id": "gmp07", "label": "SW7_A", "at": [ 3, 2 ], "to": "toggle 7 (Q7, 7 octaves down) - other lug to the switch common bus", "parts": [ { "id": "SW7", "kind": "toggle", "lug": "C", "value": "SPST", "role": "octave 7" } ] }, { "id": "gmp08", "label": "SW1_A", "at": [ 3, 15 ], "to": "toggle 1 (Q1, 1 octave down)", "parts": [ { "id": "SW1", "kind": "toggle", "lug": "C", "value": "SPST", "role": "octave 1" } ] }, { "id": "gmp09", "label": "SW6_A", "at": [ 4, 2 ], "to": "toggle 6 (Q6, 6 octaves down)", "parts": [ { "id": "SW6", "kind": "toggle", "lug": "C", "value": "SPST", "role": "octave 6" } ] }, { "id": "gmp10", "label": "SW2_A", "at": [ 4, 15 ], "to": "toggle 2 (Q2, 2 octaves down)", "parts": [ { "id": "SW2", "kind": "toggle", "lug": "C", "value": "SPST", "role": "octave 2" } ] }, { "id": "gmp11", "label": "SW5_A", "at": [ 5, 2 ], "to": "toggle 5 (Q5, 5 octaves down)", "parts": [ { "id": "SW5", "kind": "toggle", "lug": "C", "value": "SPST", "role": "octave 5" } ] }, { "id": "gmp12", "label": "SW3_A", "at": [ 6, 15 ], "to": "toggle 3 (Q3, 3 octaves down)", "parts": [ { "id": "SW3", "kind": "toggle", "lug": "C", "value": "SPST", "role": "octave 3" } ] }, { "id": "gmp13", "label": "SW4_A", "at": [ 6, 2 ], "to": "toggle 4 (Q4, 4 octaves down)", "parts": [ { "id": "SW4", "kind": "toggle", "lug": "C", "value": "SPST", "role": "octave 4" } ] }, { "id": "gmp14", "label": "OUT_T", "at": [ 0, 15 ], "to": "output jack tip", "parts": [ { "id": "JK1", "kind": "jack", "lug": "T", "value": "1/4 in" } ] }, { "id": "gmp15", "label": "BUS", "at": [ 0, 0 ], "to": "the switch common bus - daisy-chain all seven toggles and bring one wire back here", "parts": [ { "id": "SW1", "kind": "toggle", "lug": "1", "value": "SPST", "role": "octave 1" }, { "id": "SW2", "kind": "toggle", "lug": "1", "value": "SPST", "role": "octave 2" }, { "id": "SW3", "kind": "toggle", "lug": "1", "value": "SPST", "role": "octave 3" }, { "id": "SW4", "kind": "toggle", "lug": "1", "value": "SPST", "role": "octave 4" }, { "id": "SW5", "kind": "toggle", "lug": "1", "value": "SPST", "role": "octave 5" }, { "id": "SW6", "kind": "toggle", "lug": "1", "value": "SPST", "role": "octave 6" }, { "id": "SW7", "kind": "toggle", "lug": "1", "value": "SPST", "role": "octave 7" } ] }, { "id": "gmp16", "label": "VOL_T", "at": [ 0, 1 ], "to": "volume pot, top lug", "parts": [ { "id": "POT1", "kind": "pot", "lug": "3", "value": "B100K", "role": "volume" } ] }, { "id": "gmp17", "label": "VOL_W", "at": [ 0, 3 ], "to": "volume pot wiper", "parts": [ { "id": "POT1", "kind": "pot", "lug": "W", "value": "B100K", "role": "volume" } ] }, { "id": "gmp18", "label": "+V", "at": [ 10, 15 ], "to": "the preamp's supply - wire it to the power toggle's common, beside V+", "parts": [ { "id": "SW8", "kind": "toggle", "lug": "C", "value": "SPST", "role": "power" } ] }, { "id": "gmp19", "label": "IN", "at": [ 14, 0 ], "to": "input jack tip - anything: a guitar, a synth, a phone", "parts": [ { "id": "JK2", "kind": "jack", "lug": "T", "value": "1/4 in" } ] }, { "id": "gmp20", "label": "GAIN_A", "at": [ 15, 9 ], "to": "gain pot, one outer lug - the minus side of C4. The third lug stays empty", "parts": [ { "id": "POT2", "kind": "pot", "lug": "1", "value": "B100K", "role": "gain" } ] }, { "id": "gmp21", "label": "GAIN_W", "at": [ 13, 6 ], "to": "gain pot wiper - ground. Turned to zero is the most gain, about 101", "parts": [ { "id": "POT2", "kind": "pot", "lug": "W", "value": "B100K", "role": "gain" } ] }, { "id": "gmp22", "label": "PRE_OUT", "at": [ 10, 2 ], "to": "the preamp out, pin 1 - wire it to CLK_IN" }, { "id": "gmp23", "label": "TRK_A", "at": [ 10, 0 ], "to": "tracking switch, one lug - pin 1", "parts": [ { "id": "SW9", "kind": "toggle", "lug": "1", "value": "SPST", "role": "tracking" } ] }, { "id": "gmp24", "label": "TRK_B", "at": [ 11, 0 ], "to": "tracking switch, other lug - the free end of C7. Closed, C7 sits across R12", "parts": [ { "id": "SW9", "kind": "toggle", "lug": "C", "value": "SPST", "role": "tracking" } ] } ], "netlist": "# Grub Divider Mk II - written from the board\n# 16 strips of 17 holes, 27 parts, 2 chips, 24 cuts\n#\n# The Grub Divider on strips 0 to 8, hole for hole as built. A TL072 preamp\n# on strips 9 to 15, sharing the ground strip and nothing else on the copper.\n# Its supply comes in on the +V pad and its output leaves on PRE_OUT, both\n# wired off the board: +V to the power toggle, PRE_OUT to CLK_IN. A switch\n# from TRK_B to TRK_A puts C7 across R12 for tracking.\n\nV+: @V+ C1.A IC1.14\nGND: @GAIN_W @GND @OUT_S @VOL_G C1.B C5.B C6.A IC1.7 IC2.4 J1.A J1.B J2.A J2.B J3.A J3.B R15.A R8.B R9.B\nPRE_V: @+V C6.B IC2.8 R14.B\nBUS: @BUS @VOL_T\nVOL_W: @VOL_W C2.A\nC2_B: C2.B R10.A\nOUT_T: @OUT_T R10.B\nCLK_IN: @CLK_IN IC1.1 R8.A\nMR_PAD: @MR_PAD IC1.2 R9.A\nIC1_NC: IC1.13\nSW7_A: @SW7_A R7.B\nIC1_Q7: IC1.3 R7.A\nIC1_Q1: IC1.12 R1.A\nSW1_A: @SW1_A R1.B\nSW6_A: @SW6_A R6.B\nIC1_Q6: IC1.4 R6.A\nIC1_Q2: IC1.11 R2.A\nSW2_A: @SW2_A R2.B\nSW5_A: @SW5_A R5.B\nIC1_Q5: IC1.5 R5.A\nIC1_NC_2: IC1.10\nSW4_A: @SW4_A R4.B\nIC1_Q4: IC1.6 R4.A\nIC1_Q3: IC1.9 R3.A\nSW3_A: @SW3_A R3.B\nIC1_NC_3: IC1.8\nVREF: C5.A IC2.5 J5.A J5.B R11.A R14.A R15.B\nPRE_OUT: @PRE_OUT @TRK_A IC2.1 R12.A\nTRK_B: @TRK_B C7.A\nIN_N: C7.B IC2.2 R12.B R13.A\nOUT_B: IC2.6 IC2.7 J4.A J4.B\nIN_P: C3.B IC2.3 R11.B\nIN: @IN C3.A\nC4_P: C4.A R13.B\nGAIN_A: @GAIN_A C4.B\n", "offboard": [ "DC1.+ - SW8.1" ] }