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Schematics/LUTHERS_VCO.diy | 0 3D Printing/Rails/18hp_innie.stl Normal file Unescape Parametric Potentiometer Knob Generator version 1.1 2012 Steve Cooley ( http://sc-fa.com , http://beatseqr.com , http://hapticsynapses.com © 2021 Matthias Ansorg ( https://ma.juii.net A parametric OpenSCAD design that allows to generate CV, in particular for controlling VCO notes. The classic is called a "Baby 8". Final tweaks, version submitted to Licensor for the overall arrow size. // How much horizontal space needed for left-hand and right-hand sub-panels left_panel_width = 12.5*3 + tolerance*4; //three knobs plus space between them left_panel_spacing = (left_panel_width) / 2.5; slider_spacing = 12.5; // space between them //left_panel_spacing = left_panel_width / 3 + tolerance*8; right_panel_width = width_mm - thickness*2; slider_center = (width_mm - left_panel_width - right_panel_width)/2 + left_panel_width; panel(width); // waves out wall(h=4, w=width_mm-hole_dist_top-4); // one more to mount a circuit outside the full dev board (in some cases) Arduino + DAC https://www.youtube.com/watch?v=t3kUPjdiq0o for explainer https://drive.google.com/drive/folders/156nn9rClRLJplS4M46s56-Pibi86Z-Kp for schematics and .ino file uses an LM13700 OTA (operational transconductance amplifier) (~$1.50, uncommon, and DIP marked obsolete) and NE5532 (uncommon, 80¢ based on EPCOS app note at http://www.cypress.com/file/140006/download DFN, 6 Pin (https://www.analog.com/media/en/technical-documentation/data-sheets/MAX4460-MAX4462.pdf#page=19, https://www.analog.com/media/en/package-pcb-resources/package/pkg_pdf/tdfn-ep/21-0137.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-140-02-xx-DV-PE-LC, 40 Pins (http://www.molex.com/pdm_docs/sd/5019204001_sd.pdf), generated with kicad-footprint-generator connector JST J2100 series connector, S06B-J21DK-GGXR (http://www.jst-mfg.com/product/pdf/eng/eJFA-J2000.pdf), generated with kicad-footprint-generator Soldered wire connection with double feed through strain relief, for 6 times 0.25 mm² wires, reinforced insulation, conductor diameter 2.4mm, see , script-generated with , script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_Phoenix THT Terminal Block WAGO 804-114 45Degree pitch 7.5mm size 21.5x15mm^2 drill 1.2mm pad 3mm Terminal Block TE 282834-4, 4 pins, pitch 5mm, size 40x9mm^2, drill diamater 1.2mm, pad diameter 2.6mm, see http://www.metz-connect.com/de/system/files/productfiles/Datenblatt_310671_RT019xxHDWC_OFF-023605N.pdf, script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_RND THT terminal block RND 205-00086 pitch 10mm Varistor, diameter 9mm, width 4.8mm, pitch 5mm size 31.5x15mm^2 drill 1.2mm pad 2.4mm Terminal Block WAGO 236-206 45Degree pitch 5mm size 30x12.5mm^2 drill 1.4mm pad 2.8mm terminal block.

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