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12.5*3 + tolerance*4; //three knobs plus space for well-aligned, well-printed numbers // step rotary switch to adjust CV output range, switch between 5v and 2.5v max (or whatever is configured). Momentary-normal-off pushbutton to manually reset. LEDs: One per step, to set output voltages. (10) One potentiometer per step, to indicate current step. (10 One multi-pole rotary switch with ground pin http://www.ckswitches.com/media/1479/kmr2.pdf tactile push button, 6x6mm e.g. PHAP33xx series, height=8mm tactile push button, 6x6mm e.g. PHAP33xx series, height=7.3mm tactile push button, 6x6mm e.g. PHAP33xx series, height=5mm tactile push button, 6x6mm e.g. PHAP33xx series, height=4.3mm tactile push button, 6x6mm e.g. PHAP33xx series, height=4.3mm tactile push button, 6x6mm e.g. PHAP33xx series, height=8.5mm tactile push button, 6x6mm e.g. PHAP33xx series, height=8mm tactile push button, 6x6mm e.g. PHAP33xx series, height=8.5mm tactile push button, 6x6mm e.g. PTS645xx series, height=9.5mm tactile push button, 6x6mm e.g. PHAP33xx series, height=4.3mm tactile push button, 6x6mm e.g. PHAP33xx series, height=9.5mm tactile push button, 6x6mm e.g. PHAP33xx series, height=9.5mm tactile push button, 6x6mm e.g. PHAP33xx series, height=8mm tactile push button, 6x6mm e.g. PHAP33xx series, height=4.3mm tactile push button, 6x6mm e.g. PTS645xx series, height=9.5mm tactile push button, 6x6mm e.g. PHAP33xx series, height=13mm FS5700 series pushbutton footswitch, DPDT, https://www.e-switch.com/system/asset/product_line/data_sheet/226/FS5700.pdf Switch with High Contact Reliability, Top-actuated Model, with Ground Terminal, with Boss Ultra-small-sized Tactile Switch for High-Density Mounting, 3.1mm height, https://omronfs.omron.com/en_US/ecb/products/pdf/en-b3fs.pdf C&K Components SPST SMD PTS645 Series 6mm Tact Switch Low-profile SMD Tactile Switch, http://www.helloxkb.com/public/images/pdf/TS-1187A-X-X-X.pdf Ultraminiature Surface Mount Single Row 2.54mm (0.1 inch) Pitch PCB Connector, M20-89018xx, 18 Pins per row (http://suddendocs.samtec.com/prints/lshm-1xx-xx.x-x-dv-a-x-x-tr-footprint.pdf), generated with kicad-footprint-generator ipc_gullwing_generator.py TQFP, 48 Pin (https://www.nxp.com/docs/en/package-information/98ASA00694D.pdf DFN8 2x2, 0.5P; CASE 506CN (see ON Semiconductor 506CN.PDF DC8 Package 8-Lead Plastic PSOP, Exposed Die Pad (see Microchip Packaging Specification 00000049BS.pdf SSOP28: plastic shrink small outline package; 14 leads; body width 4.4 mm; thermal pad LQFP, 32 Pin (https://www.nxp.com/docs/en/package-information/SOT358-1.pdf), generated with kicad-footprint-generator connector JST ZE series connector, B24B-PUDSS (http://www.jst-mfg.com/product/pdf/eng/ePUD.pdf), generated with kicad-footprint-generator JST XA series connector, BM07B-GHS-TBT (http://www.jst-mfg.com/product/pdf/eng/eGH.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-106-02-xxx-DV-A, 6 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 StandardBox.py.

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