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Ovals avoid non-circular holes in footprints whenever possible; some fabs charge more for ovals PCB layout: [front](Docs/precadsr_layout_front.pdf), [back](Docs/precadsr_layout_back.pdf) * [BOM](Docs/precadsr_bom.md) * [Build notes](Docs/build.md) How to use your choice of 9 mm pots, you're on your own! * The first two groups should be 1. // @todo Calculate the convexity values based on https://www.analog.com/media/en/technical-documentation/data-sheets/199399fc.pdf TO-92 2-pin leads in-line, wide, drill 0.75mm, hand-soldering variant with enlarged pads (see NXP SSOP-TSSOP-VSO-REFLOW.pdf and sot556-1_po.pdf 24-Lead Plastic DFN (4mm x 3mm) (see Linear Technology 05081955_0_DHC18.pdf DHD Package; 16-Lead Plastic TSSOP (4.4mm); Exposed Pad (see Microchip Packaging Specification 00000049BS.pdf SSOP28: plastic shrink small outline package; 32 leads; body width 4.4 mm; (see NXP SSOP-TSSOP-VSO-REFLOW.pdf and sot337-1_po.pdf SSOP16: plastic shrink small outline transistor (see http://www.onsemi.com/pub/Collateral/NST3906F3-D.PDF 3-pin SuperSOT package http://www.mouser.com/ds/2/149/FMB5551-889214.pdf 8-pin SuperSOT package, http://www.icbank.com/icbank_data/semi_package/ssot8_dim.pdf Power MOSFET package, 3x3mm (see https://www.fairchildsemi.com/datasheets/FD/FDMC8032L.pdf Fairchild-specific MicroPak-6 1.0x1.45mm Pitch 0.5mm https://www.nxp.com/docs/en/application-note/AN10343.pdff Fairchild-specific MicroPak-6 1.0x1.45mm Pitch 0.5mm USON-20 2x4mm Pitch 0.4mm X2SON-8 1.4x1mm Pitch0.35mm http://www.ti.com/lit/ds/symlink/pca9306.pdf Maxim Integrated TSOC-6 D6+1,https://datasheets.maximintegrated.com/en/ds/DS2401.pdf, https://pdfserv.maximintegrated.com/land_patterns/90-0321.PDF ATPAK SMD package, http://www.infineon.com/cms/en/product/packages/PG-TO263/PG-TO263-7-1/ D2PAK DDPAK TO-263 D2PAK-7 TO-263-7 SOT-427 TO-263 / D2PAK / DDPAK SMD package, http://www.infineon.com/cms/en/product/packages/PG-TO263/PG-TO263-5-1/ D2PAK DDPAK TO-263 D2PAK-7 TO-263-7 SOT-427 TO-263 / D2PAK / DDPAK SMD package, orientation marker at anode, https://dammedia.osram.info/media/resource/hires/osram-dam-5824137/SFH%204257_EN.pdf LED PLCC-2 SMD TOPLED LED PLCC-2 SMD package, http://rohmfs.rohm.com/en/techdata_basic/ic/package/hrp7_1-e.pdf, http://rohmfs.rohm.com/en/products/databook/datasheet/ic/motor/dc/bd621x-e.pdf SC-59, hand-soldering varaint, https://lib.chipdip.ru/images/import_diod/original/SOT-23_SC-59.jpg SOT, 3 Pin (https://www.jedec.org/sites/default/files/docs/Mo-178D.PDF inferred 3-pin variant), generated with kicad-footprint-generator connector wire 0.5sqmm double-strain-relief Soldered wire connection, for a single 0.15 mm² wire, basic insulation, conductor diameter 0.9mm, outer diameter 2.7mm, size source Multi-Contact FLEXI-E_0.25 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times outer diameter, generated with kicad-footprint-generator Hirose DF11 through hole, DF13-11P-1.25DSA, 11 Pins (http://www.molex.com/pdm_docs/sd/022272021_sd.pdf), generated with kicad-footprint-generator Mounting Hardware, inside through hole lga land grid array Bosch LGA, 8 Pin (https://www.monolithicpower.com/en/documentview/productdocument/index/version/2/document_type/Datasheet/lang/en/sku/MP2303A/document_id/494#page=14), generated with kicad-footprint-generator ipc_noLead_generator.py QFN, 20 Pin (https://pdfserv.maximintegrated.com/package_dwgs/21-100132.PDF), generated with kicad-footprint-generator Soldered wire connection, for 6 times 1 mm² wires, basic 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 Molex LSHM 0.50 mm Razor Beam High-Speed Hermaphroditic Terminal/Socket Strip, LSHM-150-xx.x-x-DV-S, 50 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 Inductor SMD Pulse PA4320 Pulse PA4344 / PM4344 Series SMD Inductors Inductor, Sagami, h=6.0mm, http://www.sagami-elec.co.jp/file/CER1242B-CER1257B-CER1277B.pdf Inductor, Sagami, h=8.0mm, http://www.sagami-elec.co.jp/file/CER1242B-CER1257B-CER1277B.pdf Sagami power inductor, 0808, 1.9x2.0mm, https://www.coilcraft.com/getmedia/50382b97-998f-4b75-b5ee-4a93b0ac4411/xfl2010.pdf Wire Wound Chip Common Mode Choke, https://www.coilcraft.com/pdfs/1812can.pdf WE-SL5.

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