arcade button bar

simple bar to mount cherry mx switches and a sparkfun pro micro or
clone, intended to be attached to an arcade panel to control mame.

diff --git a/arcade-helper/button-bar.scad b/arcade-helper/button-bar.scad
new file mode 100644 (file)
index 0000000..6158071
--- /dev/null
+++ b/arcade-helper/button-bar.scad
@@ -0,0 +1,184 @@
+/* Arcade Button Bar Helper
+ * Copyright (C) 2017  Clinton Ebadi <clinton@unknownlamer.org>
+ *
+ * This program 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.
+ *
+ * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+// todo
+//  - integrate good key cap library for example keys
+
+
+$fs = 0.1;
+
+cols = 6;
+rows = 1;
+
+bolt_depth = 12;
+screw_d = 3.5;
+
+wall = 4;
+bottom = 2;
+border = 3;
+
+nutcatch_size = 6;
+
+
+// switch depth + pin depth + clearance + room for mcu and wires
+case_depth = 3.5 + 3.3 + 3.2 + 3;
+
+echo ("case_depth = ", case_depth);
+
+button_size = 20;
+
+// derived
+box_size_x = cols*button_size+border*2;
+box_size_y = rows*button_size+border*2;
+
+
+module supports () {
+     for (x = [ 0, ceil (cols/2)*button_size+border*2 - nutcatch_size, box_size_x - nutcatch_size], y = [ 0, box_size_y - nutcatch_size]) {
+         translate ([x, y, 0]) {
+              children ();
+         }
+     }
+}
+
+module plate_hole () {
+     translate ([nutcatch_size/2, nutcatch_size/2, 0])
+         circle (d = screw_d, $fs = 0.1);
+}
+
+module nutcatch (screw_only=false) {
+         translate ([nutcatch_size/2, nutcatch_size/2, (case_depth+wall)/2]) {
+              difference () {
+                   if (!screw_only) cube ([nutcatch_size, nutcatch_size, case_depth+wall], center=true);
+
+                   translate ([0, 0, (case_depth+wall-bolt_depth)/2+0.01]) cylinder (d = screw_d - 1, h = bolt_depth, center=true, $fs=0.1);
+              }
+         }
+}
+
+module cherrymx_slot () {
+     width = 14;
+     square (width, center=true);
+     // y=width-2 is supposed to be correct, but seemed better this way
+     square ([width+2, width-3], center=true);
+}
+
+
+module switch_plate_base (bevel=2, holes=true) {
+     difference () {
+         offset (r=bevel) offset (r=-bevel) square ([box_size_x, box_size_y]);
+         translate ([border, border, 0]) {
+              for (i = [ 0 : cols-1 ]) {
+                   for (j = [ 0 : rows-1 ]) {
+                        translate ([i*button_size + button_size/2, button_size/2 + j*button_size, 0])
+                             children ();
+                   }
+              }
+         }
+         if (holes) {
+              supports () plate_hole ();
+         }
+     }
+}
+
+
+
+
+module switch_plate (thickness=1.5, bevel=2) {
+     linear_extrude (height=thickness) {
+         switch_plate_base (cols=cols, rows=rows, button_size=button_size, bevel=bevel)
+         {
+              children ();
+         }
+     }
+}
+
+
+
+module case (depth=case_depth, wall=wall) {
+     module usb_port (w = 13, h = bottom + 6) {
+         translate ([wall, box_size_y/2-w/2, bottom]) rotate ([0, 0, 90])  cube ([w, wall+0.01, h]);
+
+     }
+
+     module mcu_holder () {
+         barrier_depth = 3;
+         barrier_x = 35.0 + nutcatch_size;
+         barrier_width = 2;
+
+         translate ([barrier_x, 0, bottom]) cube ([barrier_width, box_size_y, barrier_depth]);
+     }
+
+     difference () {
+         linear_extrude (height=depth+bottom) switch_plate_base (cols=cols, rows=rows, holes=false);
+         supports () nutcatch (screw_only=true);
+
+         difference () {
+              translate ([wall/2, wall/2, bottom+0.01])
+                   linear_extrude (height=depth) resize ([box_size_x-wall, box_size_y-wall, 1]) switch_plate_base (cols=cols, rows=rows, holes=false);
+              supports () nutcatch ();
+         }
+         usb_port ();
+     }
+     mcu_holder ();
+}
+
+module keys () {
+     $fs = 0.1;
+     $fa = 0.1;
+     keys = [ "", "",  "",  "" ,"",];
+
+     for (i = [ 0 : len (keys) ])
+         translate ([i * button_size + border, border, 0])
+              oneAlphanumericKey(keys[i], xOffset=-38.5, font="fontawesome");
+
+     translate ([(cols-1) * button_size + border, (rows-1) * button_size + border, 0]) oneAlphanumericKey ("⏎", xOffset=-38.5, font="DejaVu Sans");
+}
+
+module test_fit () {
+     color ("OliveDrab") switch_plate () { cherrymx_slot (); }
+     color (alpha=0.6) translate ([45, 10, 10]) keys ();
+     translate ([0, 0, -30]) case ();
+
+}
+
+module print () {
+     switch_plate () { cherrymx_slot (); }
+     translate ([0, box_size_y+5, 0]) case ();
+}
+
+print ();
+//test_fit ();
+
+/* module keys () { */
+/*      $fs = 0.1; */
+/*      $fa = 0.1; */
+/*      keys = [  "", "", "",  "", "" ]; */
+/*      for (j = [ 0 : rows-1 ]) { */
+/*       for (i = [ 0 : cols-1 ]) { */
+/*            index = i*(cols-1)+j; */
+/*            if (index < len(keys)) { */
+/*                 echo (i, j, i*j, index); */
+/*                 translate ([i * button_size + border, j * button_size + border, 0]) */
+/*                      oneAlphanumericKey(keys[index], xOffset=-38.5, font="fontawesome"); */
+/*            } */
+/*       } */
+/*      } */
+
+
+/*      translate ([(cols-1) * button_size + border, (rows-1) * button_size + border, 0]) oneAlphanumericKey ("⏎", xOffset=-38.5, font="DejaVu Sans"); */
+/* } */