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TO-262-3, Horizontal, RM 1.27mm, staggered type-1, see http://www.st.com/resource/en/datasheet/l298.pdf TO-220-15 Horizontal RM 2.54mm TO-220F-4, Horizontal, RM 5.45mm, see https://toshiba.semicon-storage.com/us/product/mosfet/to-247-4l.html TO-247-2 Vertical RM 5.45mm TO-3P-3, Vertical, RM 5.45mm, see https://www.fairchildsemi.com/package-drawings/TO/TO264A03.pdf TO-264-2 Vertical RM 2.29mm IPAK TO-251-3, Vertical, RM 2.54mm, see https://www.njr.com/semicon/PDF/package/TO-220F-4_E.pdf TO-220F-4 Vertical RM 10.9mm TO-247-3, Horizontal, RM 1.7mm, Pentawatt, Multiwatt-5, see http://www.analog.com/media/en/package-pcb-resources/package/pkg_pdf/ltc-legacy-to-220/to-220_5_05-08-1421_straight_lead.pdf TO-220-5 Vertical RM 2.286mm Plastic near cylindrical package Sod-70 see: https://www.nxp.com/docs/en/data-sheet/KTY81_SER.pdf [StepUp generated footprint] SOT-227 / SOT-227B / ISOTOP, M4 mounting hole 2.2mm no annular m8 Mounting Hole 2.2mm, M2, ISO14580 mounting hole 5.5mm no annular m2 din965 Mounting Hole 6.4mm, no annular, M6, ISO14580 mounting hole 2.7mm m2.5 iso14580 Mounting Hole 8.4mm, M8 mounting hole 4mm no annular m4 Mounting Hole 4.3mm, M4 mounting hole position tweaks 45c41b9873c867fd482202c4f0c018a6f3903a54 Messing around with panel title fonts Untested hardware and software — Do not connect the Normal pin for op amp Add kicad schematic, some diylc noodling Binary files /dev/null and b/sr1_full.png differ aac0a4a5b4 Notes from debugging Notes from MK's PCB livestream Footprints: - avoid non-circular holes in footprints whenever possible; some fabs charge more for ovals - make power connection traces larger; MK uses a CA3080 OTA, an expensive and rare chip these days ($3/ea on amazon, maybe fakes) VCA MK's VCA Everything by Hagiwo (quantizer, filters, noisemakers, etc MIDI-to-CV, either over USB.

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