From bd4c253bc3686b3f4bc29b484247a8aba408b565 Mon Sep 17 00:00:00 2001
From: "Jan \"Yenya\" Kasprzak" <kas@fi.muni.cz>
Date: Fri, 7 Jul 2023 11:37:39 +0200
Subject: [PATCH] skr turbo holder

---
 skrturbo-holder.scad | 167 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 167 insertions(+)
 create mode 100644 skrturbo-holder.scad

diff --git a/skrturbo-holder.scad b/skrturbo-holder.scad
new file mode 100644
index 0000000..3a9ca7c
--- /dev/null
+++ b/skrturbo-holder.scad
@@ -0,0 +1,167 @@
+eps = 0.01;
+
+board_screw_w = 101.85;
+board_screw_h = 76.3;
+board_zoff = 10;
+board_screw_supp = 3;
+board_screw_d = 2.5;
+board_sep = 5; // realne je 4 mm na kazdou stranu
+board_sep2 = 14; // na strane kabelu vic mista
+thin_wall = 1.5;
+box_z = 40;
+box_w = board_screw_w + board_sep + board_sep2 + 2*thin_wall;
+box_h = board_screw_h + 2*board_sep + 2*thin_wall;
+
+screw_support_in = 5;
+
+clip_w = 14;
+clip_h = 4;
+screw_d = 5;
+screw_head_d = 10;
+
+x_cable_xoff = 35;
+cable_ext = 8;
+cable_wall = 2;
+cable_top = 6;
+cable_d = 10;
+nylon_d = 3;
+
+y_cable_yoff = 70;
+y_cable_rot = 60;
+y_cable_xoff = box_w + 3;
+
+cable_back = 20; // keep space for rotating it
+
+module extrusion_clip(width, thick) {
+	difference() {
+		union() {
+			cube([20, width, thick]);
+			hull() {
+				translate([6, 0, 0]) cube([8, width, thick]);
+				translate([7, 0, 0]) cube([6, width, thick+1.5]);
+			}
+		}
+		translate([10, width/2, -eps])
+			cylinder(r = screw_d/2, h = thick+1.5+2*eps, $fn = 6);
+	}
+}
+
+module cable_inlet() {
+	hull() {
+		translate([-cable_d/2, -cable_back, 0])
+			cube([cable_d/2, cable_back*0.8, box_z]);
+		translate([-cable_d/2-cable_top, -cable_back,
+			box_z - cable_wall - cable_d])
+			cube([cable_d + 2*cable_top, cable_back+cable_ext,
+				cable_d+cable_wall]);
+	}
+}
+
+module cable_inlet_hole() {
+	translate([-cable_d/2, -cable_back-eps, box_z-cable_d])
+		cube([cable_d, cable_back + cable_ext + 2*eps, cable_d+eps]);
+	translate([0, -cable_back-eps, box_z-cable_d-cable_wall - nylon_d/2])
+		rotate([-90, 0, 0])
+		cylinder(r = nylon_d/2, h = cable_ext + cable_back + 2*eps,
+			$fn = 6);
+	for (x = [-1, 1]) scale([x, 1, 1])
+	translate([cable_d/2 + cable_top/2, cable_ext/2, box_z - cable_d])
+		rotate([0, 0, 90])
+		cylinder(r = board_screw_d/2, h = cable_d + eps, $fn = 6);
+}
+
+difference() {
+	union() {
+		cube([box_w, box_h, box_z]);
+		translate([-20, 0, 0]) extrusion_clip(clip_w, clip_h);
+		translate([clip_h, box_h, clip_h])
+		rotate([0, -90, 0]) extrusion_clip(clip_w, clip_h);
+		// side beam
+		hull() {
+			translate([eps, 0, 6+clip_h]) cube([eps, box_h, 8]);
+			translate([-1.5, 0, 7+clip_h]) cube([1.5, box_h, 6]);
+		}
+
+		// top strut
+		hull() {
+			translate([0, box_h, 0]) cube([clip_h, clip_w, clip_h]);
+			translate([box_w-eps, box_h, 0]) cube([eps, eps, clip_h]);
+		}
+		// x cable
+		translate([x_cable_xoff, box_h, 0])
+			cable_inlet();
+		// y cable
+		translate([y_cable_xoff, y_cable_yoff, 0])
+			rotate([0, 0, -y_cable_rot])
+			cable_inlet();
+	}
+
+	// board base
+	translate([thin_wall, thin_wall, board_zoff])
+		cube([box_w - 2*thin_wall, box_h - 2*thin_wall, box_z]);
+	// board screw supports
+	translate([thin_wall, thin_wall+board_sep+screw_support_in,
+		board_zoff - board_screw_supp])
+		cube([box_w - 2*thin_wall,
+			board_screw_h - 2*screw_support_in, box_z]);
+	translate([thin_wall+board_sep+screw_support_in, thin_wall,
+		board_zoff - board_screw_supp])
+		cube([board_screw_w - 2*screw_support_in,
+			box_h - 2*thin_wall, box_z]);
+	// inner hole
+	translate([thin_wall+board_sep+screw_support_in,
+		thin_wall+board_sep+screw_support_in, thin_wall])
+		cube([board_screw_w - 2*screw_support_in,
+			board_screw_h - 2*screw_support_in, box_z]);
+
+	// ribs in the back side
+	let (
+		hole_min_w = 4,
+		rib_w = 2,
+		holes = floor((board_screw_w - 2*screw_support_in + rib_w)/(hole_min_w+rib_w)),
+		hole_w = (board_screw_w - 2*screw_support_in + rib_w)/holes - rib_w
+	)
+	for (i = [0:1:holes-1]) {
+		translate([thin_wall+board_sep+screw_support_in
+				+ i*(hole_w+rib_w), thin_wall+board_sep+screw_support_in, -eps])
+			cube([hole_w, box_h-2*board_sep-2*thin_wall-2*screw_support_in, thin_wall+2*eps]);
+	}
+	// holes in the bottom side
+	let (
+		hole_min_w = 10,
+		rib_w = 8,
+		hole_zoff = 15,
+		hole_h = 15,
+		holes = floor((box_w - 6*thin_wall)/(hole_min_w+rib_w)),
+		hole_w = (box_w - 6*thin_wall + rib_w)/holes - rib_w
+	)
+	for (i = [0:1:holes-1]) {
+		translate([3*thin_wall + i*(hole_w+rib_w), -eps, hole_zoff])
+			cube([hole_w, thin_wall + 2*eps, hole_h]);
+	}
+
+	// screw holes
+	for (x = [0, 1]) for (y = [0, 1])
+		translate([thin_wall+board_sep + x*board_screw_w,
+			thin_wall+board_sep + y*board_screw_h,
+			thin_wall])
+		cylinder(r = board_screw_d/2, h = box_z, $fn = 6);
+
+	// usb slot
+	translate([thin_wall + board_sep + 69.5, box_h - thin_wall - eps,
+		board_zoff + 1])
+		cube([14, thin_wall+2*eps, 11]); 
+	// microsd slot
+	translate([thin_wall + board_sep + 48, box_h - thin_wall - eps,
+		board_zoff + 1])
+		cube([16, thin_wall+2*eps, 4]); 
+	// x cable hole
+	translate([x_cable_xoff, box_h, 0])
+		cable_inlet_hole();
+
+	// y cable hole
+	translate([y_cable_xoff, y_cable_yoff, 0])
+		rotate([0, 0, -y_cable_rot])
+		cable_inlet_hole();
+}
+
-- 
2.43.0