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include <bolt.scad>
include <nut.scad>
include <panel.scad>
use <conversion.scad>
use <rounded_cube.scad>
module shell_base(pcb_dim, margins, t) {
dim = dim_pcb_to_case(pcb_dim, margins, t);
difference() {
// full body
rounded_cube(dim=dim, radius=t);
// cut away upper half
translate([0,0,dim[2]/2])
cube([dim[0], dim[1], dim[2]/2]);
// main PCB space
translate([3*t, t, t])
rounded_cube([dim[0]-6*t, dim[1]-2*t, dim[2]-2*t], t);
// remove front and back
translate([0, 2*t, 2*t])
rounded_cube([dim[0], dim[1]-4*t, dim[2]-4*t], t);
// panel holder
for (x_off = [t-panel_dim_0_tol/2, dim[0]-2*t-panel_dim_0_tol/2]) {
translate([x_off, t-panel_dim_0_tol/2, t-panel_dim_0_tol/2]) {
rounded_cube(
[
t+panel_dim_0_tol,
dim[1]-2*t+panel_dim_1_2_tol,
dim[2]-2*t+panel_dim_1_2_tol
],
t
);
}
}
// bolt drillings
for (x = [dim[0]/4, dim[0]-dim[0]/4]) {
translate([x,0,dim[2]/2-1.5*bolt_ds])
rotate([-90,0,0])
cylinder(d=bolt_ds+bolt_ds_tol, h=1.1*t, $fn=30);
}
}
}
module shell_connector(pcb_dim, margins, t) {
dim = dim_pcb_to_case(pcb_dim, margins, t);
size_x = dim[0]-6*t;
size_y = 2*nut_h;
size_z = dim[2]/2+3*bolt_ds;
difference () {
// base body
translate([3*t,dim[1]-t-size_y,0])
cube([size_x,size_y,size_z]);
// bolt holes
for (x = [dim[0]/4, dim[0]-dim[0]/4]) {
translate([x,dim[1]-t,dim[2]/2+1.5*bolt_ds])
rotate([90,0,0])
cylinder(d=bolt_ds+bolt_ds_tol, h=size_y, $fn=30);
}
// nut holes
for (x = [dim[0]/4, dim[0]-dim[0]/4]) {
translate([x,dim[1]-t-size_y,dim[2]/2+1.5*bolt_ds])
rotate([-90,0,0])
cylinder(d=nut_d+nut_d_tol, h=nut_h, $fn=30);
}
}
echo(min_shell_bolt_length=t+size_y);
}
module pcb_case_shell(pcb_dim, drillings, margins, t) {
difference () {
union() {
shell_base(pcb_dim, margins, t);
shell_connector(pcb_dim, margins, t);
for (drilling = drillings) {
translate([
2*t+margins[0][0]+drilling[0],
t+2*nut_h+margins[1][0]+drilling[1],
0
]) cylinder(d=nut_d+2, h=t+margins[2][0], $fn=30);
}
}
for (drilling = drillings) {
translate([
2*t+margins[0][0]+drilling[0],
t+2*nut_h+margins[1][0]+drilling[1],
0
]) {
cylinder(d=bolt_ds+bolt_ds_tol, h=t+margins[2][0], $fn=30);
cylinder(d=nut_d+nut_d_tol, h=nut_h, $fn=30);
}
}
}
}
module pcb_case_shell_bottom(pcb_dim, drillings, margins, t) {
pcb_case_shell(pcb_dim, drillings, margins, t);
}
module pcb_case_shell_top(pcb_dim, margins, t) {
dim = dim_pcb_to_case(pcb_dim, margins, t);
translate([0, dim[1], dim[2]])
rotate([180,0,0])
pcb_case_shell(pcb_dim, [], margins, t);
}
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