things/semaphore.scad

   1 eps = 0.01;
   2 infty = 100;
   3
   4 wall = 1.5;
   5
   6 led_d = 10 + 0.5;
   7 led_angle = 10;
   8 led_depth = 4;
   9 led_x = led_d/2+0.75;
  10
  11 body_x = led_d + 2*led_x + 15;
  12 body_d = 14;
  13 top_off = body_d*tan(led_angle);
  14 body_y = led_d + 2*top_off + 5*wall;
  15 base_w = led_d + 4*wall;
  16
  17 screw_d = 3.8;
  18 screw_head = 8;
  19 // screw_y = led_d/2+screw_head/2+wall;
  20 screw_x = body_x/2 +wall + screw_head/2;
  21 screw_wall = 2.5;
  22
  23 cable_w = 7;
  24 cable_h = screw_wall;
  25
  26 module body() {
  27         hull() {
  28                 for (i = [-1, 1]) translate([i*led_x, 0, 0])
  29                         cylinder(r = base_w/2, h = eps);
  30         //      translate([-led_x-led_d/2-wall, -led_d/2-wall, 0])
  31         //              cube([2*led_x + led_d + 2*wall, led_d+2*wall, eps]);
  32                 translate([-body_x/2, -body_y/2, body_d-screw_wall])
  33                         cube([body_x, body_y, screw_wall]);
  34                 for (i = [-1, 1]) scale([i, 1, 1]) {
  35                         translate([screw_x-screw_head/2, -screw_head/2-wall, body_d-screw_wall])
  36                                 cube([screw_head, screw_head+2*wall, screw_wall]);
  37                         translate([screw_x-screw_head/2, -screw_head/2-wall, 0])
  38                                 cube([screw_head/2, screw_head+2*wall, eps]);
  39                 }
  40         }
  41 };
  42
  43
  44 module main_hole() {
  45         hull() {
  46                 for (i = [-1, 1])
  47                         rotate([led_angle, 0, 0]) {
  48                                 translate([i*led_x, 0, led_depth])
  49                                         cylinder(r = led_d/2+wall/2, h = eps);
  50                         }
  51                 translate([-body_x/2+wall, -body_y/2+wall, body_d-screw_wall])
  52                         cube([body_x-2*wall, body_y-2*wall, screw_wall+eps]);
  53         }
  54         for (i = [-1, 1])
  55                 rotate([led_angle, 0, 0])
  56                         translate([i*led_x, 0, led_depth])
  57                                 cylinder(r = led_d/2+wall/2, h = infty);
  58 }
  59
  60 difference() {
  61         body();
  62         // LED holes
  63         for (i = [-1, 1])
  64                 rotate([led_angle, 0, 0])
  65                         translate([i*led_x, 0, -infty/2])
  66                                 cylinder(r = led_d/2, h = infty);
  67         // main hole
  68         difference() {
  69                 main_hole();
  70 //              translate([-screw_head/2-wall, screw_y-screw_head/2-wall, 0])
  71 //                      cube([screw_head+2*wall, screw_head+2*wall, infty]);
  72         };
  73         for (i = [-1, 1]) scale([i, 1, 1]) {
  74                 // screw head hole
  75                 translate([screw_x-screw_head/2, -screw_head/2, -eps])
  76                         cube([screw_head+wall, screw_head, body_d-screw_wall]);
  77                 // screw hole
  78                 translate([screw_x-screw_d/2, -screw_head/2, -eps])
  79                         cube([screw_d, screw_head, infty]);
  80         }
  81         // cable hole
  82         translate([-led_x, 0, 0])
  83                 rotate([0, 0, 30])
  84                 translate([-infty, -cable_w/2, body_d-cable_h])
  85                         cube([infty, cable_w, cable_h+eps]);
  86 }