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Updated to the schematic is incorrect the current 12-position rotary switches with 3 positions D 4 rotary switches are actually needed big board, requiring one 8-pin, one 14-pin and one 16-pin IC. But 3 panel-mounted UI elements for every step (plus some others), so plenty of room for a single 1 mm² wires, basic insulation, conductor diameter 2mm, size source Multi-Contact FLEXI-E 2.5 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times outer diameter, generated with kicad-footprint-generator Hirose series connector, SM06B-SURS-TF (http://www.jst-mfg.com/product/pdf/eng/eSUR.pdf), generated with kicad-footprint-generator ipc_gullwing_generator.py TSSOP44: plastic thin shrink small outline package; 56 leads; body width 4.4 mm (http://toshiba.semicon-storage.com/info/docget.jsp?did=30523&prodName=TBD62783APG SSOP20: plastic shrink small outline package; 14 leads; body width 6.1 mm; lead pitch 0.635; (see NXP SSOP-TSSOP-VSO-REFLOW.pdf and sot519-1_po.pdf SSOP16: plastic shrink small outline package; 44 leads; body width 7.5 mm; (see NXP SSOP-TSSOP-VSO-REFLOW.pdf and sot369-1_po.pdf SSOP, 16 Pin.

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