76 lines
2.3 KiB
OpenSCAD
76 lines
2.3 KiB
OpenSCAD
$fn = 20;
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baseplate_thickness = 2;
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inner_clearance = 6.5; // space inside the case for the battery/mcu to occupy
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pcb_thickness = 1.6; // thickness of the pcb
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module roundsquare (size, r) {
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translate([r, r]) minkowski() {
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square([size.x-2*r, size.y-2*r]);
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circle(r=r);
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}
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}
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module shell () {
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difference() {
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// block
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linear_extrude(baseplate_thickness + inner_clearance + pcb_thickness) {
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translate([-1, -1]) roundsquare([214+1*2, 67+1*2], r=2+1);
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}
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// cut for shelf
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translate([0, 0, baseplate_thickness + inner_clearance]) linear_extrude(pcb_thickness + 2) {
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roundsquare([214, 67], r=2-0.25); // pcb r=2 but it's not exact
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}
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// cut for inner clearance
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translate([0, 0, baseplate_thickness]) linear_extrude(inner_clearance + 10) {
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translate([1, 1]) roundsquare([214 - 1 * 2, 67 - 1 * 2], r=1);
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}
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}
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}
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module standoffs () {
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// for M2 3x3 standoffs
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hole_diameter = 3;
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hole_depth = 3 * 1.5;
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wall_thickness = 1;
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// offsets the top of the standoffs down from where the pcb will actually rest; this allows the screws to actually hold the pcb down against the outer lip of the case and prevent rattling if the pcb is not perfectly flat
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standoff_top_face_offset = -0.25;
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for (point = [
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[17 + 18 * 0, 16.5 + 17 * 0],
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[17 + 18 * 2, 16.5 + 17 * 2],
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[17 + 18 * 4, 16.5 + 17 * 0],
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[17 + 18 * 5, 16.5 + 17 * 2],
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[17 + 18 * 6, 16.5 + 17 * 0],
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[17 + 18 * 8, 16.5 + 17 * 2],
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[17 + 18 * 10, 16.5 + 17 * 0],
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]) {
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translate([point.x, point.y, baseplate_thickness - 0.01]) difference() {
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cylinder(h = inner_clearance + standoff_top_face_offset + .01, d = hole_diameter + 2*wall_thickness);
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translate([0, 0, inner_clearance + standoff_top_face_offset + .1 - hole_depth]) cylinder(h = hole_depth + .02, d = hole_diameter); // hole inner - adjust for insert size
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}
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}
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}
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difference() {
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shell();
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translate([2, 65-.01, baseplate_thickness])
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// cube([34, 2, 30]);
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// cube([34, 5, 6]);
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cube([18+17-2, 2, 30]);
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// usb-c cutout
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translate([17 + 18/2 - 9/2, 71, baseplate_thickness + inner_clearance - 6.5]) {
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rotate([90, 0, 0]) linear_extrude(8) {
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roundsquare([9, 3.75], r = 1.5);
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}
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}
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// power switch cutout
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translate([4, 71, baseplate_thickness + inner_clearance - 2]) {
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rotate([90, 0, 0]) linear_extrude(8) {
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roundsquare([6.5, 2], r = 0.5);
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}
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}
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}
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standoffs();
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