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+ MCP4725 (DAC). ** https://hkadesign.org.uk/monotronkb.html for yet another fairly simple one, using Arduino (nano or uno) + MCP4725 (DAC). ** https://hkadesign.org.uk/monotronkb.html for yet another version Alternative: CV from something else VCF MK's Diode Ladder VCF Kassutronic's KS-20 VCA MK's VCA Probably a straightforward build: one op-amp, four transistors and some example modules f80e4975fb checkpoint before getting really weird with WireIt A couple more GND-stitch vias eb8580ef62 Undo converting GND to GND_JMP and fix everything that broke 3583986e89 Finished PCB, passes all passable DRCs Footprint selection, some PCB layout choices From c6741b48f0ef8a6e69ecbca1a47bc4f4b481e2a3 Mon Sep 17 00:00:00 2001 Subject: [PATCH 10/18] More tweaks after pro review "different_unit_footprint": "error", "different_unit_net": "error", "duplicate_reference": "error", "duplicate_sheet_names": "error", More tweaks after pro review } ], "meta": { "version": 3 }, "net_colors": null, "netclass_assignments": null, updates to rev 2 beta by adding +5V, and both trigger/gate and CV routing updates led holes to PCB edge 10.889999999999999mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 25-pin D-Sub connector edge mount solder cup female x-pin-pitch 2.77mm mounting holes 63.5mm, distance of mounting holes distance 47.1mm 25-pin D-Sub connector edge mount solder cup male x-pin-pitch 2.77mm mounting holes 47.1mm, distance of mounting holes 33.3mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 15-pin D-Sub connector, solder-cups edge-mounted, female, x-pin-pitch 2.77mm, distance of mounting holes 33.3mm, distance of mounting holes 63.5mm, distance of mounting holes 63.5mm, distance of mounting holes 33.3mm, distance of mounting holes 33.3mm, distance of mounting holes 47.1mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 9-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-S, 30 Pins (https://www.molex.com/pdm_docs/sd/537480308_sd.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-129-02-xxx-DV-LC, 29 Pins per row (http://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=82181_SOFTSHELL_HIGH_DENSITY&DocType=CS&DocLang=EN), generated with kicad-footprint-generator Molex CLIK-Mate series connector, S13B-XASK-1N-BN (http://www.jst-mfg.com/product/pdf/eng/eXA1.pdf), generated with kicad-footprint-generator JST GH top entry JST GH series connector, 505405-0970 (http://www.molex.com/pdm_docs/sd/5054050270_sd.pdf), generated with kicad-footprint-generator Harwin Female Vertical Surface Mount Package (https://www.fairchildsemi.com/package-drawings/ML/MLSOP08A.pdf Power Integrations variant of TO-92), also known as TO-226, wide, drill 0.75mm, hand-soldering variant with enlarged pads (see https://www.diodes.com/assets/Package-Files/TO92L.pdf and http://www.ti.com/lit/an/snoa059/snoa059.pdf TO-92L Molded Narrow transistor TO-92L leads in-line (large body variant.

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