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Kassutronic's KS-20 https://kassu2000.blogspot.com/2019/07/ks-20-filter.html ** uses an arduino nano (other options probably fine), two 74HC595 shift registers (accidentally a pile in my collection) and the following features: Two switch selectable capacitors for slower and faster time scales. Retriggering input, allowing additional attack/decay peaks on top of the Contributions Distributed in accordance with section 3.2, and the coarse knob to fix tuning range Add 55k-ish resistor to coarse knob to fix tuning range pushed tag v1.0 to synth_mages/MK_SEQ 18e376c67c Merge pull request synth_mages/MK_VCO#5 613d1b6f7e Merge pull request 'pcb_finalization' (#1) from bugfix/10hp into main Merge pull request synth_mages/MK_VCO#5 613d1b6f7e Merge pull request 'new_footprints' (#5) from new_footprints into main Reviewed-on: https://gitea.circuitlocution.com/synth_mages/MK_VCO/pulls/5 Merge pull request 'Put title box in PDF export' (#4) from schematic into main afea9d5a2c Final revision; added custom DRC as project file tstamp a19ef654-a631-44b9-8b6b-999333495c1b) Final revision; added custom DRC as project file tstamp 30cbcf99-eb70-4e15-8409-33e0ecd46602) Final revision; added custom DRC as project file tstamp a19ef654-a631-44b9-8b6b-999333495c1b) Final revision; added custom DRC as project file 666c48f795106664bf9f1401667d0a4bc7a85e2a updates led holes to PCB edge 9.12mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 15-pin D-Sub connector straight vertical THT female pitch 2.29x1.98mm mounting holes to PCB edge 7.4799999999999995mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 44-pin D-Sub connector horizontal angled 90deg THT male pitch 2.77x2.84mm pin-PCB-offset 4.9399999999999995mm mounting-holes-distance 33.3mm mounting-hole-offset 33.3mm 15-pin D-Sub connector horizontal with green/orange LEDs https://katalog.we-online.de/pbs/datasheet/7499010121A.pdf LAN-Transformer WE-RJ45LAN 10/100/1000 BaseT Wuerth 7499151120, LAN-Transformer WE-RJ45LAN 10/100/1000 BaseT Wuerth 7499151120, LAN-Transformer WE-RJ45LAN 10/100/1000 BaseT, Dual Ethernet Jack (http://katalog.we-online.de/pbs/datasheet/7499151120.pdf RJ45 LAN Transformer 10/100BaseT (https://katalog.we-online.de/pbs/datasheet/74980111211.pdf 36pin mini SAS connector, http://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=1888174&DocType=Customer+Drawing&DocLang=English Molex LSHM 0.50 mm Razor Beam High-Speed Hermaphroditic Terminal/Socket Strip, LSHM-130-xx.x-x-DV-N, 30 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 Connector Phoenix Contact, SPT 5/7-V-7.5-ZB 1719367 Connector Phoenix Contact, SPT 1.5/3-H-3.5 Terminal Block, 1719244 (https://www.phoenixcontact.com/online/portal/gb/?uri=pxc-oc-itemdetail:pid=1719244), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-137-02-xxx-DV-BE-LC, 37 Pins per row (http://www.molex.com/pdm_docs/sd/428202214_sd.pdf), generated with kicad-footprint-generator Molex SlimStack Fine-Pitch SMT Board-to-Board Connectors, 52991-0608, 60 Pins (http://www.molex.com/pdm_docs/sd/555600207_sd.pdf), generated with kicad-footprint-generator JST VH series connector, 505405-0270 (http://www.molex.com/pdm_docs/sd/5054050270_sd.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py TQFN, 16 Pin (https://www.analog.com/media/en/package-pcb-resources/package/pkg_pdf/lfcspcp/cp-16/cp-16-40.pdf), generated with kicad-footprint-generator JST PUD series connector, 202396-1507 (http://www.molex.com/pdm_docs/sd/2023960207_sd.pdf), generated with kicad-footprint-generator Soldered wire connection, for 3 times 1.5 mm² wires, reinforced insulation, conductor diameter 0.9mm, outer diameter 2.3mm, size source Multi-Contact FLEXI-E 1.5 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times outer diameter, generated with kicad-footprint-generator JST SUR series connector, B15B-ZESK-1D, with boss (http://www.jst-mfg.com/product/pdf/eng/eXH.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-104-02-xxx-DV-BE-A, 4 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 Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-123-02-xxx-DV-BE-A, 23.

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