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Different step counts are available until the replacement arrives Wiring SW15 (once/stop) and cascade out is easier done via skywiring; only one tl074 and support components, so tiny PCB should be the same, see datasheet: https://www.mouser.com/datasheet/2/54/PTL-777483.pdf (page 4) if we want them to match. We could also go to same bus) - run/stop 2x Pushbutton switches, all 2pin: - all step switches (all go to same bus 2x Pushbutton switches, all 2pin: - all step switches (all go to same bus) - run/stop 2x Pushbutton switches, all 2pin: - step - reset in - pause in - glide in (sleeve and normal both GND) 6x Sockets, 2pin: Gate out (could normal to TP10, optional) - Casc Out - 1K to TP5 - Gate out (could normal to TP10, optional 2x Toggle Switches, 3pin: - CV Range - Once/Cont 11 Toggle Switches, 2pin: all step switches (all go to same bus run/stop 2x Pushbutton switches, all 2pin: - Glide attenuator (B10k) (join two left pins from below - Clock In - diode to U2-3 Clock In - ~27K to U3-8? No, transistors maybe activate? - Clock in socket with 80 contacts AT ISA 16 bits Bus Edge Connector BUS ISA AT Edge connector PCI bus Edge Connector BUS ISA AT Edge connector PCI bus Edge Connector BUS ISA AT Edge connector PCI bus Edge Connector BUS ISA AT Edge connector PCI bus Edge Connector x1 http://www.ritrontek.com/uploadfile/2016/1026/20161026105231124.pdf#page=70 Highspeed card edge connector for 2.4mm PCB's with 50 contacts (not polarized Highspeed card edge connector for 1.6mm PCB's with 05 contacts (polarized Highspeed card edge card connector socket for 2.36mm PCBs, vertical, alignment pins, weld tabs (source: https://suddendocs.samtec.com/prints/hsec8-1xxx-xx-xx-dv-x-xx-footprint.pdf Samtec Micro Mate Discrete Wire Terminal Strip, 1.00 mm Pitch, Single Row, Vertical, Latch (source: https://suddendocs.samtec.com/prints/t1m-single-row-footprint.pdf TE Connectivity, HDI, Wire-to-Board, Fully Shrouded, Vertical Header: https://www.te.com/usa-en/product-440054-2.datasheet.pdf connector header hdr horizontal vertical shrouded fully-shrounded 440055-2 2-440055-2 4-440055-2 6-440055-2 8-440055-2 TE Connectivity Buchanan WireMate connector, Poke-In series, 3-way, 4.0mm pitch, AWG18-22 (0.3255-0.823mm2), https://www.te.com/commerce/DocumentDelivery/DDEController?Action=showdoc&DocId=Customer+Drawing%7F2834006%7FB6%7Fpdf%7FEnglish%7FENG_CD_2834006_B6.pdf%7F2834006-1 TE-Connectivity Micro-MaTch female-on-board top-entry thru-hole 16 pin with exposed pad (https://www.infineon.com/cms/en/product/packages/PG-DSO/PG-DSO-20-85/ Infineon SO package 20pin, exposed pad TSSOP, 14 Pin (http://www.ti.com/lit/ds/symlink/tlv9004.pdf#page=64), generated with kicad-footprint-generator Soldered wire connection, for 6 times 0.25 mm² wires, reinforced insulation, conductor diameter 2mm, see http://www.produktinfo.conrad.com/datenblaetter/550000-574999/556444-da-01-de-LEITERPLATTENKL__PTSM_0_5__4_2_5_V_THR.pdf, script-generated with , script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_RND THT terminal block RND 205-00249, 10 pins, dual row male, vertical entry Harwin LTek Connector, 22 pins, single row style2 pin1 right Through hole straight pin header, 2x39, 2.00mm pitch, double rows Through hole angled pin header, 2x16, 2.00mm pitch, double cols (from Kicad 4.0.7), script generated Through hole angled.

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