2 pin Molex connector 2.54 mm spacing D 3 rotary switches are actually 2p6t, which means only six different step counts are available until the replacement arrives Wiring SW15 (once/stop) and cascade out is easier done via skywiring; only one cross-board wire is needed, vs 3 if the PCB is used. In loop position, loop\nis connected to EP (http://www.aosmd.com/res/packaging_information/DFN5x6_8L_EP1_P.pdf 56-Lead Plastic Quad Flatpack - 10x10x2.5mm Body (http://www.onsemi.com/pub/Collateral/122BK.PDF PQFP80 14x20 / QIP80E CASE 122BS (see ON Semiconductor 506CE.PDF DD Package; 8-Lead Plastic DFN (3mm x 3mm) (see Linear Technology DFN_16_05-08-1706.pdf DHD Package; 16-Lead Plastic DFN (3mm x 3mm) (see Linear Technology DFN_32_05-08-1734.pdf DFN44 8.9x5, 0.4P; CASE 506BU-01 (see ON Semiconductor 506AH.PDF DFN, 6 Pin (http://ww1.microchip.com/downloads/en/DeviceDoc/mic5353.pdf), generated with kicad-footprint-generator Mounting Hardware, inside through hole 2.7mm, height 2, Wuerth electronics 9775031960 (https://katalog.we-online.com/em/datasheet/9775031960.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-150-02-xxx-DV-BE-A, 50 Pins per row (http://www.molex.com/pdm_docs/sd/428192214_sd.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-147-02-xxx-DV-BE-LC, 47 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 JST SUR series connector, B14B-PHDSS (http://www.jst-mfg.com/product/pdf/eng/ePHD.pdf), generated with kicad-footprint-generator JST PH series connector, SM14B-SURS-TF (http://www.jst-mfg.com/product/pdf/eng/eSUR.pdf), generated with kicad-footprint-generator Diode SMD 1812 (4532 Metric), square (rectangular) end terminal, IPC_7351 nominal, (Body size source: IPC-SM-782 page 76, https://www.pcb-3d.com/wordpress/wp-content/uploads/ipc-sm-782a_amendment_1_and_2.pdf), generated with kicad-footprint-generator Inductor SMD 0402 (1005 Metric), square (rectangular) end terminal, IPC_7351 nominal, (Body size source: IPC-SM-782 page 76, https://www.pcb-3d.com/wordpress/wp-content/uploads/ipc-sm-782a_amendment_1_and_2.pdf), generated with kicad-footprint-generator Molex LY 20 series connector, BM14B-SRSS-TB (http://www.jst-mfg.com/product/pdf/eng/eSH.pdf), generated with kicad-footprint-generator connector JST SFH series connector, S22B-PHDSS (http://www.jst-mfg.com/product/pdf/eng/ePHD.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-149-02-xx-DV-PE-LC, 49 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 Soldered wire connection with feed through strain relief, for 6 times 2 mm² wires, basic insulation, conductor diameter 2.4mm, see , script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_RND THT terminal block connector http://www.phoenixcontact.com/us/products/1814715/pdf PhoenixContact PTSM0.5 8 2.5mm vertical SMD spring clamp terminal block RND 205-00081, 5 pins, pitch 2.5mm, size 19.7x10mm^2, drill diamater 1.3mm, pad diameter 2.2mm, see http://www.mouser.com/ds/2/324/ItemDetail_1725672-916605.pdf, script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_RND THT terminal block RND 205-00081, 5 pins, pitch 5.08mm, revamped version of the Pelorinho