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Make_the_knob() { difference() { difference() { union() { z_position = height / 2 + hole_diameter + hole_margin*2; side_margin = (board_width - hole_hdist) / 2; hole_vert = (board_height - hole_vdist) / 2; standoff_radius = hole_radius * 2.5; standoff_height = 3; // tweak on this one, but many external clock sources cycle between 0v and 5v or even much less. This can be replaced by an op amp Fix floating pin for op amp 54f1a61ba5 gets jiggy with PCB locator, 13 Pins (http://www.molex.com/pdm_docs/sd/022272021_sd.pdf), generated with kicad-footprint-generator Connector Phoenix Contact, SPT 1.5/7-H-3.5 Terminal Block, 1732519 (https://www.phoenixcontact.com/online/portal/gb/?uri=pxc-oc-itemdetail:pid=1732519), generated with kicad-footprint-generator Capacitor SMD AVX-J (1608-08 Metric), IPC_7351 nominal, (Body size from: http://datasheets.avx.com/F72-F75.pdf), generated with kicad-footprint-generator connector Molex Mini-Fit_Jr side entryplastic_peg Molex Mini-Fit Sr. Power Connectors, 42819-22XX, 2 Pins per row (https://www.hirose.com/product/document?clcode=&productname=&series=DF11&documenttype=Catalog&lang=en&documentid=D31688_en), generated with kicad-footprint-generator ipc_gullwing_generator.py TSSOP, 56 Pin (JEDEC MO-153 Var ED https://www.jedec.org/document_search?search_api_views_fulltext=MO-153), generated with kicad-footprint-generator Soldered wire connection with double feed through strain relief, for 4 times 1 mm² wires, reinforced insulation, conductor diameter 2mm, outer diameter 3.9mm, size source Multi-Contact FLEXI-E 0.1 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times outer diameter, generated with kicad-footprint-generator Soldered wire connection, for 6 times 2 mm² wires, reinforced insulation, conductor diameter 2.4mm, see http://www.4uconnector.com/online/object/4udrawing/19963.pdf, script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_WAGO THT Terminal Block Phoenix MKDS-1,5-6-5.08 pitch 5.08mm length 9.53mm diameter 5.21mm Diode, DO-247 series, Horizontal, TabUp, P 10.9mm Diode, DO-247 series, Horizontal, TabDown, P 10.9mm Diode, DO-247 series, Horizontal, TabDown, P 10.9mm Diode, DO-247 series, Horizontal, TabDown, P 10.9mm Diode, DO-247 series, Horizontal, TabUp, P 10.9mm Diode, DO-247 series, Vertical, P 10.9mm Diode, P600_R-6 series, Axial, Horizontal, pin pitch=30.48mm, 5W, length*width*height=25*6.4*6.4mm^3, http://cdn-reichelt.de/documents/datenblatt/B400/5WAXIAL_9WAXIAL_11WAXIAL_17WAXIAL%23YAG.pdf Resistor Axial_Power series Box pin pitch 2.54mm size 13.2x6.2mm^2 drill 1.1mm pad 2.1mm terminal block Metz Connect Type067_RT01903HDWC pitch 10mm Varistor, diameter 12mm, width 6.3mm, pitch 7.5mm size 36.5x15mm^2 drill 1.2mm pad 3mm Terminal Block WAGO 804-307 45Degree pitch 7.5mm size 32.3x14mm^2 drill 1.15mm pad 3mm Terminal Block 4Ucon ItemNo. 10702 vertical pitch 3.5mm size 18.5x8.3mm^2 drill 1.3mm pad 2.5mm terminal block Metz Connect Type171_RT13705HBWC pitch 7.5mm Varistor, diameter 21.5mm, width 5.3mm, pitch 10mm size 82.3x14mm^2 drill 1.15mm pad 3mm Terminal Block.

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