rpi-mount.scad

   1 // -*- C -*-
   2
   3 include <utils.scad>
   4
   5 pi_board_gap = 0.5;
   6 pi_board_support_z = 2;
   7 pi_board_support_wall = 2;
   8
   9 pi_sz   = [ 66.0, 30.5 ] + pi_board_gap * [1,1];
  10
  11 pi_nom_sz = [ 65, 30 ];
  12 pi_nom_centres_in = 3.5;
  13 pi_solder_side_gap = 1.5 * 2;
  14 pi_screw_hole_dia  = 2.3;
  15 pi_screw_hole_wall = 2.3;
  16
  17 pi_sz_z_incl_ribbon = 18.0;
  18
  19 pi_mount_z_min = 1.75;
  20 pi_mount_z_def = 2.50;
  21
  22 // calculated, output
  23
  24 function pi_ribbon_top_z(pi_mount_z= pi_mount_z_def)
  25   = pi_mount_z + pi_sz_z_incl_ribbon;
  26
  27 module PiMount(pi_mount_z= pi_mount_z_def){
  28   sxy = pi_nom_sz/2 - [1,1] * pi_nom_centres_in;
  29   for (mx=[0,1]) mirror([mx,0,0]) for (my=[0,1]) mirror([0,my,0]) {
  30     difference(){
  31       union(){
  32         linextr(-0.1, pi_mount_z + pi_board_support_z, convexity=1)
  33           rectfromto( pi_nom_sz/2 - 2 * [1,1] * pi_nom_centres_in,
  34                       pi_sz/2 + [1,1] * pi_board_support_wall);
  35         linextr(-0.1, pi_mount_z - pi_solder_side_gap, convexity=1)
  36           translate(sxy)
  37           square(center=true, pi_screw_hole_dia + pi_screw_hole_wall*2);
  38       }
  39       linextr(pi_mount_z, pi_mount_z + 5, convexity=1)
  40         rectfromto(-[10,10], pi_sz/2);
  41       translate( sxy )
  42         linextr(-1, pi_mount_z + 10, convexity=1)
  43         circle(r= pi_screw_hole_dia/2);
  44     }
  45   }
  46 }