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Reduce heat conduction during soldering - ground planes are copper fill applied everywhere there isn't a trace on one side to center of package, Thorlabs photodiodes TO-46-3, Pin2 at center of package, Thorlabs photodiodes, https://www.thorlabs.de/drawings/374b6862eb3b5a04-9360B5F6-5056-2306-D912111C06C3F830/FDGA05-SpecSheet.pdf TO-92 leads molded, narrow, drill 0.75mm (see NXP SSOP-TSSOP-VSO-REFLOW.pdf and sot552-1_po.pdf 14-Lead Plastic DFN, 4mm x 3mm (http://www.analog.com/media/en/package-pcb-resources/package/pkg_pdf/ltc-legacy-dfn/05081731_C_DE14MA.pdf Linear UKG52(46) package, QFN-52-1EP variant (see http://cds.linear.com/docs/en/datasheet/3886fe.pdf MLF, 6 Pin (https://www.silabs.com/documents/public/data-sheets/Si7020-A20.pdf), generated with kicad-footprint-generator Molex Pico-EZmate_Slim series connector, 53780-0870 (), generated with kicad-footprint-generator ipc_noLead_generator.py XDFN4 footprint (as found on the rails v_wall(h=4, l=height-rail_clearance*2-thickness, th=thickness*1.25); v_wall(h=4, l=height-rail_clearance*2, th=right_rib_thickness); //outline of whole PCB cube([137.5, 97, 1], center=true); echo("Putting a hole with radius: ", hole_r , " at ", width_mm - h_margin; left_rib_x = thickness * 1; //right_rib_x = width_mm - col_right; // column from edge plus hole radius // mounting holes distance 47.1mm 26-pin D-Sub connector horizontal https://katalog.we-online.de/pbs/datasheet/7499010001A.pdf 10/100Base-TX RJ45 ethernet connector with transformer and POE, https://abracon.com/Magnetics/lan/ARJP11A.PDF Shielded, LEDs, 4 Ports, https://cdn.amphenol-cs.com/media/wysiwyg/files/drawing/rjhse538x04.pdf RJ45 8p8c dual ethernet cat5 1 Port RJ45 Connector Through Hole Mount Test Points Keystone Miniature THM Test Point 5005-5009, http://www.keyelco.com/product-pdf.cfm?p=1314 Keystone Miniature THM Test Point 5000-5004, http://www.keyelco.com/product-pdf.cfm?p=1309 Through Hole 10/100 Base-T, AutoMDIX, https://www.amphenolcanada.com/ProductSearch/Drawings/AC/RJMG1BD3B8K1ANR.PDF RJ45 Vertical.

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