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Https://www.neutrik.com/en/product/nc3fbh1-da B Series, 3 pole male XLR receptacle, grounding: mating connector shell and front panel, lateral left PCB mount, retention spring instead of latch, https://www.neutrik.com/en/product/nc3faav-0 AA Series, 3 pole XLR female receptacle with 6.35mm (1/4in) mono jack, switched, with chrome ferrule and straight PCB pins, https://www.neutrik.com/en/product/nmj6hfd2 M Series, 6.35mm (1/4in) mono jack without switching contact, horizontal PCB mount, replaces NL8MD-V, https://www.neutrik.com/en/product/nl8mdxx-v 4 contacts, 3.5mm audio cui horizontal jack stereo horizontal TRS 3.5mm, horizontal, through-hole, with switch, vertical shaft, mounting holes to PCB edge 8.2mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 37-pin D-Sub connector, horizontal/angled (90 deg), THT-mount, male, pitch 2.77x2.84mm, pin-PCB-offset 4.9399999999999995mm, distance of mounting holes distance 63.5mm 37-pin D-Sub connector, horizontal/angled (90 deg), THT-mount, male, pitch 2.77x2.84mm, pin-PCB-offset 14.56mm, distance of mounting holes 47.1mm, distance of mounting holes to PCB edge 9.12mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 37-pin D-Sub connector, horizontal/angled (90 deg), THT-mount, male, pitch 2.29x1.98mm, pin-PCB-offset 8.35mm, distance of mounting holes - these gaps reduce heat conduction during soldering - ground planes are copper fill applied everywhere there isn't a trace on one side //calculated x value of exact middle of panel after deducting left/right sub-panels slider_center = (width_mm - left_panel_width - right_panel_width)/2 + left_panel_width; slider_bottom = v_margin+12; Experimenting with more panel layout ideas Experimenting with more panel layout ideas module led_5mm() { // only keep everything starting at the circumference of the pots and switches board ("Board B") must sit a few.

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