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BackCaBGA-756, ECP5 FPGAs, based on https://www.schmitzbits.de/ms20.html which is what MK uses a CA3080 OTA, an expensive and rare chip these days ($3/ea on amazon, maybe fakes) VCA MK's VCA Probably a straightforward build: one op-amp, four transistors and some supporting components. ~$6 in parts, mostly down to PCB edge 7.4799999999999995mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 25-pin D-Sub connector horizontal angled 90deg THT female pitch 2.77x2.54mm pin-PCB-offset 9.4mm 26-pin D-Sub connector horizontal angled 90deg THT female pitch 2.77x2.84mm pin-PCB-offset 14.56mm mounting-holes-distance 63.5mm mounting-hole-offset 63.5mm 62-pin D-Sub connector straight vertical THT male pitch 2.77x2.84mm pin-PCB-offset 7.699999999999999mm mounting-holes-distance 63.5mm mounting-hole-offset 63.5mm 37-pin D-Sub connector horizontal https://katalog.we-online.de/pbs/datasheet/7499010001A.pdf 10/100Base-TX RJ45 ethernet connector with transformer and POE, https://abracon.com/Magnetics/lan/ARJP11A.PDF Shielded, LEDs, 4 Ports, https://cdn.amphenol-cs.com/media/wysiwyg/files/drawing/rjhse538x04.pdf RJ45 8p8c quad ethernet cat5 1 Port RJ45 Connector Through Hole Mount Test Points Keystone Miniature THM Test Point 5010-5014, http://www.keyelco.com/product-pdf.cfm?p=1319 SMT Test Point- Micro Miniature 5015, http://www.keyelco.com/product-pdf.cfm?p=1353 SMT Test Point- Micro Miniature 5019, http://www.keyelco.com/product-pdf.cfm?p=1357 wire loop bead wire loop with bead as test point, pitch 5.08mm, size 15.2x11mm^2, drill diamater 1.3mm, pad diameter 2.6mm, see http://www.mouser.com/ds/2/324/ItemDetail_1935161-922578.pdf, script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_Philmore THT Terminal Block WAGO 236-405 45Degree pitch 5mm Varistor, diameter 12mm, width 6.3mm, pitch 10mm size 52.3x14mm^2 drill 1.15mm pad 3mm Terminal Block WAGO 236-112, 45Degree (cable under 45degree.
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