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eps=0.01;
nut_dia = 5.3;
nut_depth=5.5;
module nut_base(w=10, o) {
difference() {
cylinder(d=w, h=nut_depth+o);
translate([0, 0, o-eps]) cylinder(d=nut_dia, h=nut_depth+2*eps);
}
}
module raspi_holder(w, h, x=4) {
difference() {
union() {
cube([50+w, 50+w, h]);
translate([w/2, w/2, 0]) union() {
nut_base(o=h);
translate([50, 0, 0]) {
nut_base(o=h);
translate([0, 50, 0]) nut_base(o=h);
}
translate([0, 50, 0]) nut_base(o=h);
}
}
translate([w, w, -eps]) cube([50-w, 50-w, h+2*eps]);
translate([w/2, w/2, -eps]) {
cylinder(d=x, h=h+2*eps);
translate([50, 0, 0]) {
cylinder(d=x, h=h+2*eps);
translate([0, 50, 0]) cylinder(d=x, h=h+2*eps);
}
translate([0, 50, 0]) cylinder(d=x, h=h+2*eps);
}
}
}
module rev_nut_base(w=10, h=5, a=45, x=4, th=7, tw=10) {
rotate([0, 0, a])
translate([-w/2, -w, 0]) difference() {
union() {
cube([w, w, h]);
translate([w/2, w, 0]) cylinder(d=tw, h=th);
}
translate([w/2, w, -eps]) {
cylinder(d=nut_dia, h=nut_depth+2*eps);
cylinder(d=x, h=th+2*eps);
}
}
}
module raspi_adapter(w=10, h=5, s=30) {
translate([-(50+w)/2, -(50+w)/2, 0]) raspi_holder(w=w, h=h);
difference() {
union() {
translate([-s, -(50+w)/2-5, 0]) rev_nut_base(a=-30-180);
translate([ s, -(50+w)/2-5, 0]) rev_nut_base(a=-60-90);
translate([-s, (50+w)/2+5, 0]) rev_nut_base(a=-60+90);
translate([ s, (50+w)/2+5, 0]) rev_nut_base(a=-30);
}
cube([60, 60, 100], center=true);
}
}
raspi_adapter($fn=25);
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