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BackHorizontal rib // h_wall(h=4, l=right_rib_x); // one more vertical to mount a circuit board to, dead center // pcb_holder(h=10, l=top_row-rail_clearance*2-15-thickness, th=1.15, wall_thickness=1); // lower h-rib reinforcer ## Photos [to be added] ## Documentation: * [Schematic](Docs/precadsr.pdf) * PCB layout: [front](Docs/precadsr_layout_front.pdf), [back](Docs/precadsr_layout_back.pdf * [How to use](Docs/use.md 96f746fa2d Final tweaks, version submitted to JLCPCB on 20240124 3d279dd88c Finish schematic, add PDF 2d3c489f2a More SR1 notation SR 1.pdf | Bin 0 -> 92229 bytes.
- Http://www.st.com/resource/en/datasheet/stm32f446ze.pdf UFBGA-144, 12x12 raster, 10x10mm package, pitch.
- 10 Pins per row (http://suddendocs.samtec.com/prints/hle-1xx-02-xx-dv-xe-xx-mkt.pdf.
- //Fourth row interface placement triangle_out = [output_column.
- 4.5363 -3.08479 21.833 vertex -1.05741 -7.11568 7.9151 facet.