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Back. <- drop out as specified. Cube([knob_radius_bottom, knob_radius_bottom, external_indicator_height], center = true); hole_depth = max(knob_radius_top, knob_radius_bottom, stem_radius) + nothing; cylinder(r = shafthole_radius, h = hole_depth, center = false); z_position = height - v_margin*2 - title_font_size; working_increment = (working_height-v_margin+thickness) / (9); // generally-useful spacing amount for vertical columns of stuff col_left = h_margin; col_right = width_mm - thickness*2; left_rib_x = thickness * 1; right_rib_x = width_mm - thickness*2; // pcb_holder(h=10, l=top_row-rail_clearance*2-15-thickness, th=1.15, wall_thickness=1); // lower h-rib reinforcer ## Photos ### Photos ## Documentation: * [Schematic](Docs/precadsr.pdf) * PCB layout: front, back How to use your choice of 9 mm vertical board mount | | Knobs | | | | J2 | 1 nF | Unpolarized capacitor | | Tayda | A-3545, A-3489, or A-3499\*\*\* | | | | Tayda | A-1605 | | | | Tayda | A-826 | | Tayda | A-1624 or A-2969 | | R1, R2 | 2 | 10uF | Polarized capacitor | | | | | | | | | | | | | C1, C11, C12 | 1 | TL071 | Operational amplifier, DIP-8 | | | | | | S1 | 1 nF | Unpolarized capacitor | | J8 | 1 | SW_SPDT | Switch, triple pole double throw, illuminated paddle, red and green LEDs K switch dual double-pole single-throw OFF-ON D Double Pole Single Throw (SPST) switch, small symbol D 10x DIP Switch, Single Pole Single Throw (SPST) switch, small symbol D 7x DIP Switch, Single Pole Single Throw (SPST) switch, small symbol D 4x DIP Switch, Single Pole Single Throw (SPST) switch, small symbol D Push button switch, generic, two pins Switch, single pole normally-open tactile switch D reed switch, default-closed D SPDT reed switch K reed magnetic switch SPDT D rotary switch - 9.5mm, +5mm extra space available - mini toggle switch - number of pins: 13; pin pitch: 3.81mm; Angled; threaded flange; footprint includes mount hole for mounting screw: ISO 1481-ST 2.2x6.5 C or ISO 7049-ST 2.2x4.5 C (http://www.fasteners.eu/standards/ISO/7049/) || order number: 1827949 8A 160V Generic Phoenix Contact connector footprint for: MCV_1,5/2-GF-3.81; number of pins: 15; pin pitch: 3.81mm; Vertical; threaded flange || order number: 1847495 8A 320V.
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