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The front Don't put R8 so close to R26 -- D36/R47 too close Testing before powering up: Clock In Normal - 1k to U2-8 (AND NOT short to U2-10 Clock Rate - variable resist +6k between U2-8 and U2-9 Reset Sw - when pressed, short +12V and Reset In - U1-13 (can get at from top when assembled - Stop Switch - 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; working_increment = working_height / (8+tolerance/5); // generally-useful spacing amount for vertical columns of stuff left_panel_width = 12*3 + tolerance*2; // rib + half a jack col_right = width_mm - h_margin; left_rib_x = thickness + 9.5/2 + tolerance*2; // rib + half a jack col_right = width_mm - thickness*2; // draw a "vertical" wall 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); // Create a hole for mounting screw: ISO 1481-ST 2.2x4.5 C or ISO 7049-ST 2.2x4.5 C (http://www.fasteners.eu/standards/ISO/7049/) || order number: 1830619 8A 160V Generic Phoenix Contact connector footprint for: MSTB_2,5/16-GF; number of pins: 11; pin pitch: 5.08mm; Vertical || order number: 1776566 12A.

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