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Http://optoelectronics.liteon.com/upload/download/DS86-2013-0004/LTR-303ALS-01_DS_V1.pdf Optoisolator with LED backlight 160x104 RS-232 I2C or SPI http://www.lcd-module.com/fileadmin/eng/pdf/grafik/edip160-7e.pdf LCD-graphical display with a capacitor / resistor pair, see Fireball's hard sync (to a clock/gate/trigger input) Quantizer Interfaces to digital components and interconnects between middle and bottom boards. Final work on PCB with on-board components Moritz Klein (https://www.ericasynths.lv/shop/diy-kits-1/edu-diy-vca/ - Two CV inputs for each, one primary and one 16-pin IC. But 3 panel-mounted UI elements for every step (plus some others), so plenty of room for a single through-hole on one side to center of package, Thorlabs photodiodes TO-46-3, Pin2 at center of hole, with a hair of margin // margins from edges h_margin = hole_dist_side + thickness; width_mm = 70.8; // 14HP×5.08mm = 71.12; ES for 14HP is 70.8 first_row = 25.65; //mm second_row = 47.25; //mm third_row = 65.75; //mm fourth_row = 88.25; //mm fifth_row = 108.75; //mm // Center adjust to fit two mounting posts into hole_top = out_row_1 + 12 + 60 + 24; hole_top = out_row_1 + 12 + 60 + 24; hole_left = slider_center - 13; hole_bottom = hole_top - 90; DivotRadius = KnobMinorRadius*.4; // Primary knob cylinder for (i=[0 : Knurls-1] rotate([0, 0, 180] // Left side: meta-step controls // run/stop (switch // once/continuous (sw15 // 2 NO Moment switches: // 1 for cv glide atten (rv15 // 13 SPDT switches (many used as SPST) 2 momentary pushbutton switches 1 rotary switch - number of pins: 03; pin pitch: 5.08mm; Vertical; threaded flange || order number: 1766741 12A 630V Generic Phoenix Contact SPT 2.5/4-V-5.0-EX Terminal Block, 1732519 (https://www.phoenixcontact.com/online/portal/gb/?uri=pxc-oc-itemdetail:pid=1732519), generated with kicad-footprint-generator JST PH series connector, BM02B-SURS-TF (http://www.jst-mfg.com/product/pdf/eng/eSUR.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py VQFN, 28 Pin (http://ww1.microchip.com/downloads/en/PackagingSpec/00000049BQ.pdf#page=283), generated with kicad-footprint-generator ipc_noLead_generator.py QFN, 24 Pin (JEDEC MO-153 Var FB https://www.jedec.org/document_search?search_api_views_fulltext=MO-153), generated with kicad-footprint-generator JST GH series connector, BM03B-ZESS-TBT.

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