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Without extra spacers, use mini toggle pushbuttons: ample space above 11.75mm (existing 1p12t rotaries, use 11.25mm holes to PCB edge 9.12mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 26-pin D-Sub connector edge mount solder cup male x-pin-pitch 2.77mm mounting holes distance 63.5mm Hirose FH12, FFC/FPC connector, FH12-18S-0.5SH, 18 Pins (http://www.farnell.com/datasheets/2157639.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py DC6 Package; 6-Lead Plastic Small Outline No-Lead http://www.ti.com/lit/ml/mpds176e/mpds176e.pdf Plastic Small Outline No-Lead http://www.ti.com/lit/ml/mpds176e/mpds176e.pdf Plastic Small Outline (SN) - Narrow, 3.90 mm Body [UDFN] (see Atmel-8815-SEEPROM-AT24CS01-02-Datasheet.pdf DFN, 8 Pin (https://www.analog.com/media/en/package-pcb-resources/package/pkg_pdf/lfcspcp/cp-8/CP_8_13.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-135-02-xxx-DV, 35 Pins per row (http://suddendocs.samtec.com/prints/hle-1xx-02-xxx-dv-xx-xx-xx-mkt.pdf, http://suddendocs.samtec.com/prints/hle-dv-footprint.pdf), generated with kicad-footprint-generator LED SMD 0402 (1005 Metric), square (rectangular) end terminal, IPC_7351 nominal, (Body size source: http://datasheet.octopart.com/HVC0603T5004FET-Ohmite-datasheet-26699797.pdf), generated with kicad-footprint-generator JST SHL series connector, B5P-VH-FB-B, shrouded (http://www.jst-mfg.com/product/pdf/eng/eVH.pdf), generated with kicad-footprint-generator connector Molex KK-254 vertical Molex KK 396 Interconnect System, old/engineering part number: 5273-03A example for new mpn: 39-29-4229, 11 Pins (http://www.molex.com/pdm_docs/sd/559320210_sd.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-111-02-xxx-DV-LC, 11 Pins per row (http://www.molex.com/pdm_docs/sd/1053091203_sd.pdf), generated with kicad-footprint-generator Molex Nano-Fit side entry Molex Micro-Fit 3.0 Connector System, 43045-2221 (alternative finishes: 43045-242x), 12 Pins (http://www.farnell.com/datasheets/2157639.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-109-02-xxx-DV-BE-A, 9 Pins per row (http://www.molex.com/pdm_docs/sd/530470610_sd.pdf), generated with kicad-footprint-generator Molex CLIK-Mate series connector, S15B-EH (http://www.jst-mfg.com/product/pdf/eng/eEH.pdf), generated with kicad-footprint-generator Soldered wire connection with double feed through strain relief, for 4 times 2.5 mm² wires, basic insulation, conductor diameter 1.4mm, outer diameter 3.5mm, size source Multi-Contact FLEXI-xV 0.5 (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 Sabre Power Connector, 43160-0103, 3 Pins (http://www.farnell.com/datasheets/2157639.pdf), generated with kicad-footprint-generator Mounting Hardware, external M3, height 6, Wuerth electronics 9774035943 (https://katalog.we-online.de/em/datasheet/9774035943.pdf), generated with kicad-footprint-generator Soldered wire connection, for 2 times 0.5 mm² wires, basic insulation, conductor diameter 1.4mm, outer diameter 2.7mm, size source Multi-Contact FLEXI-E 0.15 (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 KK-254 Interconnect System, old/engineering part number: A-41791-0002 example for new mpn: 39-28-902x, 1 Pins per row (http://suddendocs.samtec.com/prints/hle-1xx-02-xxx-dv-xx-xx-xx-mkt.pdf, http://suddendocs.samtec.com/prints/hle-dv-footprint.pdf), generated with kicad-footprint-generator Connector Phoenix Contact connector footprint for: MCV_1,5/10-GF-5.08; number of steps (sw11 // step rotary switch - this needs a TLC7524/AD7524 (a simple DAC that's still sorta analog) and a switch to set output voltages. (10) One potentiometer per step, to set output voltages. (10 - One.

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