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Uses a CA3080 OTA, an expensive and rare chip these days ($3/ea on amazon, maybe fakes) VCA MK's VCA Probably a straightforward build: one op-amp, four transistors and some example modules schematic start, and some example modules f80e4975fb checkpoint before trying to fit two mounting posts into hole_top = out_row_1 + 12 + 60 + 24; hole_left = slider_center - 13; hole_bottom = hole_top - 89.75; hole_right = hole_left + 78.5; footprint "eurorack_rail_hole" (version 20221018) (generator pcbnew footprint "SLIDE_POT_0547" (version 20221018) (generator pcbnew Docs/precadsr_bom.md Normal file Unescape Hardware/PCB/precadsr/ao_tht.pretty/Potentiometer_Alpha_RD901F-40-00D_Single_Vertical_CircularHoles.kicad_mod Normal file Unescape // Width of "dial" ring (in mm). If dome cap is selected, it is machine-specific data Forget (and ignore) fp-info-cache file as it is impossible for You to the name of the last step and output jacks 2eebdf7ecf Add four more switches/buttons, move LED drivers onto PCB 496e3e3344 Correcting changed filename in .prl 54f1a61ba5 gets jiggy with PCB locator, 12 Pins per row (https://www.molex.com/pdm_docs/sd/022057045_sd.pdf), generated with kicad-footprint-generator Soldered wire connection with double feed through strain relief, for 4 times 0.25 mm² wires, reinforced insulation, conductor diameter 1.25mm, outer diameter 2mm, see http://www.produktinfo.conrad.com/datenblaetter/550000-574999/556444-da-01-de-LEITERPLATTENKL__PTSM_0_5__4_2_5_V_THR.pdf, script-generated with , script-generated with , script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_MetzConnect THT single screw terminal block Metz Connect Type011_RT05504HBWC, 4 pins, pitch 5mm, size 20x9mm^2, drill diamater 1.2mm, pad diameter 2.6mm, see http://www.4uconnector.com/online/object/4udrawing/10693.pdf, script-generated with , script-generated with , script-generated with , script-generated with , script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_RND THT terminal block Metz Connect Type205_RT04502UBLC 45Degree pitch 7.5mm size 32.3x14mm^2 drill 1.15mm pad 3mm Terminal Block 4Ucon ItemNo. 10684 pitch 3.5mm size 25.2x7mm^2 drill 1.2mm pad 3mm Terminal Block Phoenix MKDS-3-7-5.08 pitch 5.08mm size 35.6x8.45mm^2 drill 1.1mm pad 2.2mm Terminal Block WAGO 804-109, 45Degree (cable under 45degree), 24 pins, pitch 5.08mm, size 15.2x11mm^2, drill diamater 1.2mm, pad diameter 2.1mm, size source Multi-Contact FLEXI-E 1.0 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times 0.5 mm² wires, reinforced insulation, conductor diameter 1.7mm, outer diameter 3.9mm, size source Multi-Contact FLEXI-E_0.25 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times outer diameter, generated with kicad-footprint-generator Molex Panelmate series connector, B15B-XASK-1 (http://www.jst-mfg.com/product/pdf/eng/eXA1.pdf), generated with kicad-footprint-generator connector JST XA series connector, BM02B-SURS-TF (http://www.jst-mfg.com/product/pdf/eng/eSUR.pdf), generated with kicad-footprint-generator JST SUR series connector, SM04B-ZESS-TB (http://www.jst-mfg.com/product/pdf/eng/eZE.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py QFN, 68 Pin (JEDEC MO-153 Var DA https://www.jedec.org/document_search?search_api_views_fulltext=MO-153), generated with kicad-footprint-generator ipc_noLead_generator.py DHVQFN, 20 Pin (http://ww1.microchip.com/downloads/en/DeviceDoc/40001800C.pdf), generated with kicad-footprint-generator ipc_gullwing_generator.py TSOP-I, 56 Pin (http://www.ti.com/lit/an/scea032/scea032.pdf#page=4), generated with kicad-footprint-generator Mounting Hardware, inside through hole 3.3mm, height 13, Wuerth electronics 9775056960 (https://katalog.we-online.com/em/datasheet/9775056960.pdf), generated with kicad-footprint-generator Hirose DF12E SMD.

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