clock_generator/knob/knob.scad

$fn = 10;

module shaft() {
    $fn = 200;

    difference() {
        cylinder(h = 5, d = 6);
        translate([2, -3, 0])
            cube(6);
    }

    translate([0, 0, -5])
        cylinder(h = 5, d = 8);
}

difference() {
    cylinder(h = 14, d1 = 18, d2 = 16);
    translate([0, 0, 5])
        shaft();
}

translate([0, 0, 14])
    cylinder(h = 2, d1 = 16, d2 = 12);