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BackIndicator (optional)] */ // Four hole threshold (HP h_margin = hole_dist_side + thickness; right_rib_x = width_mm - 9.5/2 - right_rib_thickness - tolerance; // rib + half a jack col_right = width_mm - h_margin; left_rib_x = hole_dist_side + thickness; v_margin = hole_dist_top*5; output_column = width_mm - right_rib_thickness; // projection: make a 2d version v_wall(h=4, l=height-rail_clearance*2, th=right_rib_thickness); // top right [left_edge + height * rotate_vector_cos, rotate_vector_sin * rail_depth] // top left [left_edge, 0], // drop to axis [left_edge, -extra_depth], // bottom horizontal rib // h_wall(h=4, l=right_rib_x); // middle horizontal rib // h_wall(h=1.6, l=right_rib_x); // bottom right [right_edge, rotate_vector_sin * height], // top horizontal rib h_wall(h=4, l=right_rib_x); // middle-bottom h rib h_wall(h=1.6, l=right_rib_x); // middle-bottom h rib h_wall(h=1.6, l=right_rib_x); // middle 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 + rotate_vector_sin * height], // top horizontal rib // h_wall(h=1.6, l=right_rib_x); // one more to mount a circuit board to, dead center v_wall(h=4, l=top_row-rail_clearance*2-thickness-15); // PCB holder pcb_holder(h=10, l=top_row-rail_clearance*2-15-thickness, th=1.15, wall_thickness=1); // lower h-rib reinforcer ## Photos ### Photos ## Documentation: * [Schematic](Docs/precadsr.pdf) * 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 the two clockwise-most pins, looking from below. Clock rate goes down.
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