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$fn=50;
inch = 25.4;
module roundedRect(size, radius)
{
x = size[0];
y = size[1];
z = size[2];
linear_extrude(height=z)
hull()
{
// place 4 circles in the corners, with the given radius
translate([(-x/2)+radius, (-y/2)+radius, 0])
circle(r=radius);
translate([(x/2)-radius, (-y/2)+radius, 0])
circle(r=radius);
translate([(-x/2) + radius, (y/2)-radius, 0])
circle(r=radius);
translate([(x/2)-radius, (y/2)-radius, 0])
circle(r=radius);
}
}
module counterSunk(position, radius)
{
union()
{
translate(position)
union()
{
cylinder(3, radius, radius, 8, center=false);
cylinder(3, 0, 3, center=false);
}
}
}
difference()
{
roundedRect([4.5*inch, 3.5*inch, 3], 5, center=false);
translate([-4*inch/2, -3*inch/2, 0])
cylinder(3, 0.13*inch, 0.13*inch, 8, center=false);
translate([-4*inch/2, 3*inch/2, 0])
cylinder(3, 0.13*inch, 0.13*inch, 8, center=false);
translate([4*inch/2, -3*inch/2, 0])
cylinder(3, 0.13*inch, 0.13*inch, 8, center=false);
translate([4*inch/2, 3*inch/2, 0])
cylinder(3, 0.13*inch, 0.13*inch, 8, center=false);
counterSunk([3*inch/2, 2*inch/2, 0], 0.056*inch);
counterSunk([-3*inch/2, 2*inch/2, 0], 0.056*inch);
counterSunk([3*inch/2, -2*inch/2, 0], 0.056*inch);
counterSunk([-3*inch/2, -2*inch/2, 0], 0.056*inch);
linear_extrude(height=5)
offset(r=3){
offset(r=-6){
union(){
square([4*inch,1.8*inch], center=true);
square([2.8*inch,3*inch], center=true);
}
}
}
}
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