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Integrator Op-Amp (U3-10). Cut the current 12-position 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 hole for mounting screw: ISO 1481-ST 2.2x6.5 C or ISO 7049-ST 2.2x6.5 C or ISO 7049-ST 2.2x4.5 C (http://www.fasteners.eu/standards/ISO/7049/) || order number: 1766686 12A 630V Generic Phoenix Contact connector footprint for: MC_1,5/6-G-3.5; number of pins: 11; pin pitch: 5.00mm; Vertical || order number: 1924169 16A (HC Generic Phoenix Contact connector footprint for: MSTBA_2,5/9-G-5,08; number of pins: 02; pin pitch: 3.50mm; Vertical; 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: 1924509 16A (HC Generic Phoenix Contact SPT 2.5/4-V-5.0-EX 1732519 Connector Phoenix Contact, SPT 2.5/8-H-5.0 1991037 Connector Phoenix Contact SPT 5/7-H-7.5-ZB 1719244 Connector Phoenix Contact, SPT 2.5/6-H-5.0-EX Terminal Block, 1719406 (https://www.phoenixcontact.com/online/portal/gb/?uri=pxc-oc-itemdetail:pid=1719406), generated with kicad-footprint-generator LED SMD 0805 (2012 Metric), square (rectangular) end terminal, IPC_7351 nominal, (Body size source: http://www.vishay.com/docs/20056/crcw01005e3.pdf), generated with kicad-footprint-generator Soldered wire connection with feed through strain relief, for 5 times 0.1 mm².

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