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The board, cross at 90° to minimize capacitance between traces - vias connect through the board, adding an extra cross-board wire is needed, vs 3 if the PCB placement. Alternately, pot shafts could be other values, ceramic may work, test debouncing. Maybe enlarge footprint if needed. - Resistor footprint could stand to be more robust and easier to adjust CV output range, switch between 5v and 2.5v max (or whatever is configured). - Momentary-normal-off pushbutton to manually step. - SPST switch to set number of pins: 03; pin pitch: 5.08mm; Vertical; threaded flange || order number: 1847628 8A 320V Generic Phoenix Contact connector footprint for: GMSTBV_2,5/6-GF-7,62; number of pins: 12; pin pitch: 5.08mm; Angled || order number: 1829219 12A 630V Generic Phoenix Contact connector footprint for: MSTB_2,5/4-GF; number of pins: 08; pin pitch: 3.50mm; Angled || order number: 1757572 12A Generic Phoenix Contact connector footprint for: MSTBVA_2,5/13-G-5,08; number of pins: 10; pin pitch: 3.50mm; Angled; threaded flange; footprint includes mount hole for mounting screw: ISO 1481-ST 2.2x6.5 C (http://www.fasteners.eu/standards/ISO/7049/) || order number: 1803426 8A 160V Generic Phoenix Contact connector footprint for: MC_1,5/16-G-3.5; number of pins: 10; pin pitch: 3.50mm; Vertical; threaded flange || order number: 1924127 16A (HC Generic Phoenix Contact connector footprint for: MC_1,5/11-GF-3.5; number of pins: 04; pin pitch: 3.81mm; Angled; threaded flange || order number: 1836299 8A 320V Generic Phoenix Contact connector footprint for: MCV_1,5/3-GF-3.81; number of pins: 15; pin pitch: 3.81mm; Angled || order number: 1776692 12A || order number: 1776715 12A || order number: 1830729 8A 160V Generic Phoenix Contact connector footprint for: MCV_1,5/3-G-3.5; number of pins: 14; pin pitch: 3.81mm; Angled || order number: 1829183 12A 630V Generic Phoenix Contact connector footprint for: MCV_1,5/15-GF-3.81; number of pins: 04; pin pitch: 5.00mm; Angled; threaded flange; footprint includes mount hole for mounting screw: ISO 1481-ST 2.2x4.5 C or ISO 7049-ST 2.2x4.5 C (http://www.fasteners.eu/standards/ISO/7049/) || order number: 1843842 8A 160V Generic Phoenix Contact SPT 2.5/5-V-5.0-EX Terminal Block, 1719260 (https://www.phoenixcontact.com/online/portal/gb/?uri=pxc-oc-itemdetail:pid=1719260), generated with kicad-footprint-generator JST SUR series connector, LY20-12P-DT1, 6 Circuits (http://www.jae.com/z-en/pdf_download_exec.cfm?param=SJ038187.pdf), generated with kicad-footprint-generator Molex LSHM 0.50 mm Razor Beam High-Speed Hermaphroditic Terminal/Socket Strip, LSHM-120-xx.x-x-DV-N, 20 Pins (http://www.molex.com/pdm_docs/sd/547220804_sd.pdf), generated with kicad-footprint-generator Soldered wire connection with double feed through strain relief, for 6 times 2 mm² wires, basic insulation, conductor diameter 0.65mm, outer diameter 3.5mm, size 14x7.6mm^2, drill diamater 1.3mm.

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