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// 'y' of rotation left_edge = -rotate_vector_sin * rail_depth; right_edge = height * rotate_vector_cos; [left_edge, rotate_vector_cos * rail_depth], // top left [left_edge, 0], // drop to axis [left_edge, -extra_depth], // bottom right [right_edge, rotate_vector_sin * rail_depth] // top horizontal rib // h_wall(h=1.6, 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 arduino nano clone (atmega 328p), 12-bit dac (mcp4726) and small amounts of supporting hardware Microcontroller and smoothed PWM https://kassu2000.blogspot.com/2019/10/quantizer.html using a setscrew). (ShaftLength must be non-zero. ShaftDiameter = 10; // [1:1:84] v_margin = hole_dist_top*2 + thickness; h_margin = hole_dist_side*4; v_margin = hole_dist_top*5; output_column = width_mm - 10 - center_adjust; center_col = width_mm/2; vertical_space = height - v_margin - title_font_size*1.5; top_row = height - v_margin*2 - title_font_size*1.5; top_row = height - v_margin; working_increment = working_height / 7; // generally-useful spacing amount for vertical columns of stuff col_left = thickness * 2; right_rib_x = width_mm - thickness*2; slider_center = (width_mm - left_panel_width - right_panel_width)/2 + left_panel_width; slider_bottom = v_margin+12; row_2 = row_1 + vertical_space/7; cv_in_1a = [left_col, row_2, 0]; cv_2b_atten = [right_col, row_2, 0]; audio_in_2 = [left_col, row_5, 0]; cv_in_2a = [left_col, row_2, 0]; fm_in = [h_margin+working_width/8, row_4, 0]; pwm_cv_lvl = [second_col, third_row, 0]; fm_lvl = [h_margin+working_width/8, row_2, 0]; fm_lvl = [second_col, first_row, 0]; c_tune = [width_mm/2, top_row, 0]; left_rib_x = 0; // [0:No, 1:Yes] ////////////////////////// ////////////////////////// RingThickness = 5*1; DivotDepth = 1.5*1; DistanceBetweenKnurls = 3*1; TimerKnobConst = 1.8*1; PI=3.14159265*1; KnobMajorRadius = KnobDiameter/2; KnobMinorRadius = KnobDiameter/2 * (1 - TaperPercentage/100); KnobRadius = KnobMinorRadius + (KnobMajorRadius-KnobMinorRadius)/2; KnobCircumference = PI*KnobDiameter; Knurls = round(KnobCircumference/DistanceBetweenKnurls); Divot=CapType; TaperAngle=asin(KnobHeight.

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