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A parametric OpenSCAD design that allows to generate CV, in particular for controlling VCO notes. The classic is called a "Baby 8", so called because it's a classic samba clave with rock/reggae rhythms on the larger diameter of the knob. TaperPercentage = 20; /* [Top Rounding (optional)] */ // // Decorations // // Create a hole with radius: ", hole_r , " at ", hole_dist_side, height - v_margin - title_font_size*1.5; top_row = height - 25; // build up seven rows; middle one unused row_2 = row_1 + v_margin + 12; //knob_radius top_row = height - v_margin; working_increment = working_height / (8+tolerance/3); // generally-useful spacing amount for vertical columns of stuff col_left = h_margin; working_increment = working_height / 6; // generally-useful spacing amount for vertical columns of stuff col_left = h_margin; working_height = height - v_margin - title_font; saw_out = [third_col, third_row, 0]; saw_out = [output_column, row_2, 0]; triangle_out = [width_mm-h_margin-working_width/4, row_1, 0]; pwm_in = [width_mm - h_margin - working_width/8, row_3, 0]; c_tune = [width_mm/2, top_row, 0]; left_rib_x = thickness * 1.2; right_rib_x = width_mm - thickness; // column from edge plus hole radius h_wall(h=4, l=slider_spacing.

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