Added Duet Ethernet and Duex PCB models.

Made green terminals parametric.
Separated pin_headers and green_terminals out from pcb.scad.

tests/green_terminals.scad

@@ -0,0 +1,29 @@
+//
+// NopSCADlib Copyright Chris Palmer 2018
+// nop.head@gmail.com
+// hydraraptor.blogspot.com
+//
+// This file is part of NopSCADlib.
+//
+// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
+// GNU General Public License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along with NopSCADlib.
+// If not, see <https://www.gnu.org/licenses/>.
+//
+use <../utils/layout.scad>
+
+include <../vitamins/green_terminals.scad>
+
+module green_terminals()
+    layout([for(t = green_terminals) gt_depth(t)], 15)
+        rotate(180)
+            green_terminal(green_terminals[$i], len(green_terminals) + 1 - $i);
+
+if($preview)
+    green_terminals();

tests/pin_headers.scad

@@ -0,0 +1,45 @@
+//
+// NopSCADlib Copyright Chris Palmer 2018
+// nop.head@gmail.com
+// hydraraptor.blogspot.com
+//
+// This file is part of NopSCADlib.
+//
+// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
+// GNU General Public License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along with NopSCADlib.
+// If not, see <https://www.gnu.org/licenses/>.
+//
+include <../core.scad>
+use <../utils/layout.scad>
+
+include <../vitamins/pin_headers.scad>
+
+pins = 10;
+
+module pin_headers()
+    layout([for(p = pin_headers) hdr_pitch(p) * pins], 15) {
+        idc_transition(pin_headers[$i], 10);
+
+        translate([0, 20])
+            pin_header(pin_headers[$i], 10, 2);
+
+        translate([0, 40])
+            box_header(pin_headers[$i], 10, 2);
+
+        translate([0, 65])
+            pin_socket(pin_headers[$i], 10, 2);
+
+        translate([0, 95])
+            pin_socket(pin_headers[$i], 10, 2, right_angle = true);
+
+    }
+
+if($preview)
+    pin_headers();