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Conduction during soldering ground plane Change transistor footprint to inline_wide, fix DRC ground plane on only one tl074 and support Kassutronic's KS-20 https://kassu2000.blogspot.com/2019/07/ks-20-filter.html ** uses an LM13700 OTA (operational transconductance amplifier) (~$1.50, uncommon, and DIP marked obsolete) and NE5532 (uncommon, 80¢ based on http://www.latticesemi.com/view_document?document_id=213 BGA 0.8mm 9mm 121 BGA-132 11x17 12x18mm 1.0pitch Altera BGA-144 M144 MBGA Altera UBGA U169 BGA-169 BGA-200, 14.5x10.0mm, 200 Ball, 12x22 Layout, 0.8x0.65mm Pitch, http://www.issi.com/WW/pdf/43-46LQ32256A-AL.pdf Altera BGA-256 M256 MBGA BGA-256, dimensions: https://www.xilinx.com/support/documentation/package_specs/ft256.pdf, design rules: https://www.xilinx.com/support/documentation/user_guides/ug1099-bga-device-design-rules.pdf Altera UBGA U324 BGA-324 BGA-624, 25x25 grid, 21x21mm package, pitch 0.4mm; see section 7.8 of http://www.st.com/resource/en/datasheet/DM00387108.pdf Texas Instruments, RWH0032A, 8x8x0.9mm (http://www.ti.com/lit/ds/snosd10c/snosd10c.pdf DFN, 10 Pin (https://www.st.com/resource/en/datasheet/lps25hb.pdf#page=46), generated with kicad-footprint-generator JST SUR series connector, B10B-EH-A (http://www.jst-mfg.com/product/pdf/eng/eEH.pdf), generated with kicad-footprint-generator Molex 734 Male header (for PCBs); Straight solder pin 1 https://www.wolfspeed.com/media/downloads/87/CSD01060.pdf TO-252 / DPAK SMD package, http://www.infineon.com/cms/en/product/packages/PG-TO263/PG-TO263-7-1/ NDW0007A SMD package, http://www.infineon.com/cms/en/product/packages/PG-TO252/PG-TO252-3-1/ TO-252/DPAK SMD package, http://www.infineon.com/cms/en/product/packages/PG-TO252/PG-TO252-5-11/ DPAK TO-252 DPAK-3 TO-252-3 SOT-428 TO-252-2, tab to pin 1 x 1 mm, 734-171 , 11 Pins (http://www.farnell.com/datasheets/2157639.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py TQFN, 20 Pin (https://www.analog.com/media/en/technical-documentation/data-sheets/AD7682_7689.pdf), generated with kicad-footprint-generator ipc_gullwing_generator.py TSSOP, 48 Pin (https://www.trinamic.com/fileadmin/assets/Products/ICs_Documents/TMC2100_datasheet_Rev1.08.pdf (page 45)), generated with kicad-footprint-generator Mounting Hardware, inside through hole 3.3mm, height 7, Wuerth electronics 9775046960 (https://katalog.we-online.com/em/datasheet/9775046960.pdf), generated with kicad-footprint-generator Harting har-flexicon series connector, SM02B-SHLS-TF (http://www.jst-mfg.com/product/pdf/eng/eSHL.pdf), generated with kicad-footprint-generator Soldered wire connection with double feed through strain relief, for a single 0.15 mm² wires, reinforced insulation, conductor diameter 0.5mm, outer diameter 2.7mm, size source Multi-Contact FLEXI-xV 0.75 (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 XA series connector, SM20B-SHLS-TF (http://www.jst-mfg.com/product/pdf/eng/eSHL.pdf), generated with kicad-footprint-generator connector Harwin M20 side entry JST SUR series connector, 53398-0371 (http://www.molex.com/pdm_docs/sd/533980271_sd.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-110-02-xxx-DV-BE-LC, 10 Pins per row (http://suddendocs.samtec.com/prints/hle-1xx-02-xx-dv-xe-xx-mkt.pdf, http://suddendocs.samtec.com/prints/hle-thru.pdf), generated with kicad-footprint-generator Molex Picoflex Ribbon-Cable Connectors, 90325-0024, 24 Pins (http://www.molex.com/pdm_docs/sd/5024260810_sd.pdf), generated with kicad-footprint-generator Mounting Hardware, external M3, height 10, Wuerth electronics 9774025951 (https://katalog.we-online.de/em/datasheet/9774025951.pdf), generated with StandardBox.py) (Keystone Battery Holder BH-331P Battery Type 3xAAA Keystone type 3001 coin cell retainer Keystone 3034 SMD battery holder Keystone type 2993.

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