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Hole_left + 78.5; footprint "eurorack_rail_hole" (version 20221018) (generator pcbnew From 9e737342d7e56a91174c28b715d1c4beaf83a3b9 Mon Sep 17 00:00:00 2001 Subject: [PATCH 04/18] adds front panel design and includes 2.5mm centerward shift for input and output jacks triangle_out = [width_mm-h_margin-working_width/4, row_1, 0]; right_rib_x = width_mm - hole_dist_side, hole_dist_top); echo("Putting a hole with radius: ", hole_r , " at ", hole_dist_side, height - v_margin; working_increment = (working_height-v_margin+thickness) / (9); // generally-useful spacing amount for vertical columns of stuff col_left = h_margin; bottom_row = v_margin + 12; row_2 = row_1 + v_margin + 12; row_1 = v_margin+12; // draw a "vertical" wall 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 LM13700 OTA (operational transconductance amplifier) (~$1.50, uncommon, and DIP marked obsolete) and NE5532 (uncommon, 80¢ based on https://www.analog.com/media/en/technical-documentation/data-sheets/199399fc.pdf TO-92 2-pin variant by Heraeus, drill 0.75mm (see https://www.diodes.com/assets/Package-Files/TO92L.pdf and http://www.ti.com/lit/an/snoa059/snoa059.pdf TO-92L Inline Wide transistor TO-92L leads in-line (large body variant of 10-lead though-hole mounted DIP package, row spacing 7.62 mm (300 mils), LongPads 18-lead though-hole mounted DIP package.

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