{ "version": 2, "name": "Siren", "board": { "rows": 9, "cols": 21 }, "cuts": [ "1,11", "2,9", "2,12", "3,4", "3,11", "3,18", "4,5", "4,11", "4,16", "5,6", "5,10", "6,5", "6,10", "6,15", "7,5", "7,9", "7,13", "8,2" ], "ics": [ { "id": "ic1", "ref": "IC1", "part": "NE555", "pins": 8, "pin1": [ 1, 10 ], "span": 3, "autoCuts": [ "1,11", "2,12", "3,11", "4,11" ] }, { "id": "ic2", "ref": "IC2", "part": "NE555", "pins": 8, "pin1": [ 4, 4 ], "span": 3, "autoCuts": [ "4,5", "5,6", "6,5", "7,5" ] } ], "parts": [ { "id": "j1", "kind": "link", "ref": "J1", "value": "", "pins": [ [ 2, 11 ], [ 3, 12 ] ] }, { "id": "j2", "kind": "link", "ref": "J2", "value": "", "pins": [ [ 0, 12 ], [ 1, 12 ] ] }, { "id": "j3", "kind": "link", "ref": "J3", "value": "", "pins": [ [ 5, 5 ], [ 6, 6 ] ] }, { "id": "j4", "kind": "link", "ref": "J4", "value": "", "pins": [ [ 3, 20 ], [ 4, 20 ] ] }, { "id": "j5", "kind": "link", "ref": "J5", "value": "", "pins": [ [ 7, 11 ], [ 8, 11 ] ] }, { "id": "j6", "kind": "link", "ref": "J6", "value": "", "pins": [ [ 1, 0 ], [ 4, 0 ] ] }, { "id": "j7", "kind": "link", "ref": "J7", "value": "", "pins": [ [ 4, 3 ], [ 8, 3 ] ] }, { "id": "j8", "kind": "link", "ref": "J8", "value": "", "pins": [ [ 4, 18 ], [ 8, 18 ] ] }, { "id": "j9", "kind": "link", "ref": "J9", "value": "", "pins": [ [ 0, 9 ], [ 4, 9 ] ] }, { "id": "j10", "kind": "link", "ref": "J10", "value": "", "pins": [ [ 0, 1 ], [ 7, 1 ] ] }, { "id": "r1", "kind": "res", "ref": "R1", "value": "10k", "pins": [ [ 1, 15 ], [ 2, 15 ] ], "mount": "vertical" }, { "id": "r2", "kind": "res", "ref": "R2", "value": "2k2", "pins": [ [ 2, 16 ], [ 3, 16 ] ], "mount": "vertical" }, { "id": "c1", "kind": "cap", "ref": "C1", "value": "150n", "pins": [ [ 3, 17 ], [ 3, 19 ] ] }, { "id": "c2", "kind": "cap", "ref": "C2", "value": "10n", "pins": [ [ 4, 15 ], [ 4, 17 ] ] }, { "id": "c3", "kind": "ecap", "ref": "C3", "value": "10u", "pins": [ [ 3, 8 ], [ 2, 8 ] ], "polarized": true }, { "id": "r3", "kind": "res", "ref": "R3", "value": "1k", "pins": [ [ 2, 2 ], [ 3, 2 ] ], "mount": "vertical" }, { "id": "c7", "kind": "ecap", "ref": "C7", "value": "100u", "pins": [ [ 0, 8 ], [ 1, 8 ] ], "polarized": true }, { "id": "r4", "kind": "res", "ref": "R4", "value": "4k7", "pins": [ [ 7, 16 ], [ 6, 16 ] ], "mount": "vertical" }, { "id": "c4", "kind": "ecap", "ref": "C4", "value": "47u", "pins": [ [ 6, 19 ], [ 8, 19 ] ], "polarized": true }, { "id": "r5", "kind": "res", "ref": "R5", "value": "10k", "pins": [ [ 5, 19 ], [ 4, 19 ] ], "mount": "vertical" }, { "id": "r6", "kind": "res", "ref": "R6", "value": "22k", "pins": [ [ 6, 17 ], [ 5, 17 ] ], "mount": "vertical" }, { "id": "r7", "kind": "res", "ref": "R7", "value": "2k2", "pins": [ [ 6, 12 ], [ 7, 12 ] ], "mount": "vertical" }, { "id": "r8", "kind": "res", "ref": "R8", "value": "10k", "pins": [ [ 4, 8 ], [ 5, 8 ] ], "mount": "vertical" }, { "id": "r9", "kind": "res", "ref": "R9", "value": "220k", "pins": [ [ 5, 9 ], [ 6, 9 ] ], "mount": "vertical" }, { "id": "c5", "kind": "ecap", "ref": "C5", "value": "22u", "pins": [ [ 5, 2 ], [ 4, 2 ] ], "polarized": true }, { "id": "c6", "kind": "cap", "ref": "C6", "value": "10n", "pins": [ [ 7, 8 ], [ 7, 10 ] ] }, { "id": "d1", "kind": "diode", "ref": "D1", "value": "1N4148", "pins": [ [ 6, 0 ], [ 8, 0 ] ], "polarized": true, "device": "1N4148" }, { "id": "q1", "kind": "trans", "ref": "Q1", "value": "", "device": "2N3904", "pins": [ [ 6, 14 ], [ 5, 14 ], [ 4, 14 ] ] } ], "pads": [ { "id": "p1", "label": "+9V", "at": [ 0, 4 ], "to": "the power switch, then the DC jack center pin or the battery's plus", "parts": [ { "id": "SW1", "kind": "toggle", "lug": "C", "value": "SPST", "role": "power" } ] }, { "id": "p2", "label": "GND", "at": [ 1, 6 ], "to": "DC jack sleeve or the battery's minus, and the output jack sleeve", "parts": [ { "id": "DC1", "kind": "dc", "lug": "-", "value": "9 V" }, { "id": "JK1", "kind": "jack", "lug": "S", "value": "1/4 in", "role": "out" } ] }, { "id": "p3", "label": "OUT", "at": [ 3, 3 ], "to": "output jack tip (line level - into an amp or your synth)", "parts": [ { "id": "JK1", "kind": "jack", "lug": "T", "value": "1/4 in", "role": "out" } ] }, { "id": "p4", "label": "BTN_A", "at": [ 1, 14 ], "to": "woop button, one lug (momentary, normally open)", "parts": [ { "id": "BTN1", "kind": "btn", "lug": "1", "value": "normally open", "role": "woop" } ] }, { "id": "p5", "label": "BTN_B", "at": [ 7, 17 ], "to": "woop button, other lug", "parts": [ { "id": "BTN1", "kind": "btn", "lug": "2", "value": "normally open", "role": "woop" } ] }, { "id": "p6", "label": "WAIL_A", "at": [ 8, 1 ], "to": "wail switch, one lug (SPST on/off)", "parts": [ { "id": "SW2", "kind": "toggle", "lug": "1", "value": "SPST", "role": "wail" } ] }, { "id": "p7", "label": "WAIL_B", "at": [ 7, 15 ], "to": "wail switch, other lug", "parts": [ { "id": "SW2", "kind": "toggle", "lug": "C", "value": "SPST", "role": "wail" } ] } ], "netlist": "# Siren\n# A 90s cop-car siren: press and hold the button and the pitch winds up,\n# let go and it coasts back down. Tap it quick for the \"woop\".\n# The wail switch hands the button to a slow 555 that presses it for you.\n#\n# How: C4 is the \"motor\". The button charges it fast through R4; R6+R5\n# drain it slowly. R6/R5 also scale the voltage on C4 down onto the base\n# of Q1, and Q1 turns that into a current pulling pin 5 of IC1 down -\n# which raises the pitch. R7 sets the current, so any 2N3904 behaves the same. The divider\n# keeps the emitter of Q1 low so it never saturates and the pitch never sags\n# back while you hold the button.\n#\n# IC1 must be a bipolar NE555 - the pitch bend relies on its 5k divider\n# on pin 5. A 7555/TLC555 will barely bend. IC2 can be either.\n#\n# Pitch: about 650 Hz resting, up to about 1.7 kHz wound up.\n# Lower overall: C1 220n. Higher: C1 100n.\n# Higher top end: R7 1k8. Lower top end: R7 2k7.\n# Feel: R4 smaller = snappier spin-up. C4 100u = heavier motor, longer\n# coast-down (taps need to be a bit longer to woop).\n# Wail speed: C5 bigger = slower, smaller = faster.\n# Speaker instead of line out: 100u from pin 3 to an 8 ohm speaker.\n\nV+: @+9V @BTN_A IC1.8 IC1.4 IC2.8 IC2.4 R1.A R8.A C7.A\nGND: @GND IC1.1 IC2.1 C1.B C2.B C4.B C5.B C6.B C7.B R5.B R7.B\nDIS1: IC1.7 R1.B R2.A\nTHR1: IC1.2 IC1.6 R2.B C1.A\nCV1: IC1.5 C2.A Q1.C\nOUT1: IC1.3 C3.A\nOUTC: C3.B R3.A\nOUT: R3.B @OUT\nDIS2: IC2.7 R8.B R9.A\nTHR2: IC2.2 IC2.6 R9.B C5.A\nCV2: IC2.5 C6.A\nLFO: IC2.3 D1.A\nWAIL: D1.B @WAIL_A\nCHARGE: @BTN_B @WAIL_B R4.A\nMOTOR: R4.B C4.A R6.A\nBASE: R6.B R5.A Q1.B\nEMIT: Q1.E R7.A\n", "offboard": [ "DC1.+ - SW1.1" ] }