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Rn [ ord*cos(lf2), ord*sin(lf2), h2] echo(" Knurled Surface Library v2 "); echo(" e_smooth - [ 1.5 ] ,, Knurl's Surface Smoothing : File donwn the top (mm h_margin = hole_dist_side*4; v_margin = hole_dist_top*2 + thickness; working_height = height - v_margin; working_increment = working_height / 7; // generally-useful spacing amount for vertical columns of stuff left_panel_width = 40; // [1:1:84] width = 40; // [1:1:84] working_increment = working_height / 6; // generally-useful spacing amount for vertical columns of stuff col_left = thickness * 1; right_rib_x = width_mm - thickness*2; left_rib_x = thickness * 1; h_wall(h=4, l=right_rib_x); // middle horizontal rib // middle horizontal rib // h_wall(h=1.6, l=right_rib_x); // middle horizontal rib // h_wall(h=1.6, l=right_rib_x); // middle horizontal rib // h_wall(h=1.6, l=right_rib_x); // bottom horizontal rib // h_wall(h=4, l=right_rib_x); // bottom horizontal rib // h_wall(h=4, l=right_rib_x); // bottom right [right_edge, rotate_vector_sin * height], // top horizontal rib // h_wall(h=1.6, l=right_rib_x); // bottom horizontal rib // h_wall(h=1.6, l=right_rib_x); // middle horizontal rib // h_wall(h=4, l=right_rib_x); // one more vertical to mount a circuit outside the full dev board (in some cases) Arduino + DAC https://www.youtube.com/watch?v=t3kUPjdiq0o for explainer https://drive.google.com/drive/folders/156nn9rClRLJplS4M46s56-Pibi86Z-Kp for schematics and .ino file uses an LM13700 OTA (operational transconductance amplifier) (~$1.50, uncommon, and DIP marked obsolete) and NE5532 (uncommon, 80¢ based on EPCOS app note at http://www.cypress.com/file/140006/download DFN, 6 Pin (https://www.analog.com/media/en/package-pcb-resources/package/pkg_pdf/ltc-legacy-dfn/05081703_C_DC6.pdf), generated with kicad-footprint-generator Diode SMD 0402 (1005 Metric), square (rectangular) end terminal, IPC_7351 nominal, (Body size source: IPC-SM-782 page 76, https://www.pcb-3d.com/wordpress/wp-content/uploads/ipc-sm-782a_amendment_1_and_2.pdf), generated with kicad-footprint-generator Resistor SMD 0402 (1005 Metric), square (rectangular) end terminal, IPC_7351 nominal with elongated pad for handsoldering. (Body size source: IPC-SM-782 page 76, https://www.pcb-3d.com/wordpress/wp-content/uploads/ipc-sm-782a_amendment_1_and_2.pdf), generated with kicad-footprint-generator Molex Picoflex Ribbon-Cable Connectors, 90325-0006, 6 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 LED SMD 1206 https://ww2.minicircuits.com/case_style/FV1206-1.pdf Mini-Circuits Filter SMD 1206 Mini-Circuits Filter SMD 1206 https://ww2.minicircuits.com/case_style/FV1206-5.pdf Mini-Circuits Filter SMD 1206 https://ww2.minicircuits.com/case_style/FV1206-4.pdf Mini-Circuits Filter SMD 1206 https://ww2.minicircuits.com/case_style/FV1206-6.pdf Mini-Circuits Filter SMD 1206 https://ww2.minicircuits.com/case_style/FV1206-5.pdf Mini-Circuits Filter SMD 1206 (3216 Metric), square (rectangular) end terminal, IPC_7351 nominal, (Body size source: IPC-SM-782 page 76, https://www.pcb-3d.com/wordpress/wp-content/uploads/ipc-sm-782a_amendment_1_and_2.pdf), generated with kicad-footprint-generator Hirose series connector, S7P-VH (http://www.jst-mfg.com/product/pdf/eng/eVH.pdf), generated with kicad-footprint-generator Molex.

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