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Deducting left/right sub-panels 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; row_4 = row_3 + vertical_space/7; row_3 = row_2 + vertical_space/7; row_6 = row_5 + vertical_space/7; row_4 = working_increment*3 + row_1; working_increment = working_height / (8+tolerance/3); // generally-useful spacing amount for vertical columns of stuff working_height = height * rotate_vector_cos, rotate_vector_sin * height], // top horizontal rib h_wall(h=4, l=right_rib_x); // middle-bottom h rib // one more 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; label_font = 6; //knob_radius top_row = height - v_margin*2 - title_font_size; working_increment = working_height / 6; // generally-useful spacing.

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