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$doc = new DOMDocument(); $doc->loadHTML($article['content']); $xpath = $this->get_xpath_dealie($article['link']); extra_depth = 75 + tolerance; rail_depth = 27.4 + tolerance; rotate_vector_cos = 0.94; // 'x' of 20 degree rotation rotate_vector_sin = 0.34; // 'y' of rotation left_edge = -rotate_vector_sin * rail_depth; right_edge = height - v_margin; working_increment = working_height / (8+tolerance/3); // generally-useful spacing amount for vertical columns of stuff col_left = thickness * 1; right_rib_x = width_mm - 10 - center_adjust; // build up seven rows; middle one unused row_1 = vertical_space/7; row_2 = row_1 + v_margin + 12; row_2 = row_1 + vertical_space/7; cv_in_1a = [left_col, row_1, 0]; square_out = [third_col, fourth_row, 0]; //Fifth row interface placement square_out = [output_column, row_2, 0]; audio_in_2 = [left_col, row_2, 0]; pwm_in = [input_column - h_margin/2, bottom_row, 0]; c_tune = [width_mm/2 + h_margin, top_row, 0]; f_tune = [width_mm/2 - h_margin, top_row, 0]; left_rib_x = hole_dist_side + thickness; right_rib_x = width_mm - thickness; // column from edge plus hole radius // mounting holes 33.3mm, distance of mounting holes to PCB edge 8.2mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 62-pin D-Sub connector, horizontal/angled (90.

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