Add headphone holder model

README.md

@@ -18,3 +18,8 @@ uv run <model.py file>
 I needed a laptop holder that could hold 4 laptops (work, personal macbook, personal linux laptop, wife's laptop when she didn't need it). 
 This is my first real model created with build123d.
 
+### Headphone Holder
+
+![Headphone holder](./img/headphone_holder.png)
+
+This is a headphone holder with holes to screw into the rectangular leg of [my standing desk](https://www.amazon.com/dp/B0DX6XN1SJ?th=1). 

headphone_holder.py

@@ -0,0 +1,71 @@
+# /// script
+# requires-python = ">=3.14"
+# dependencies = ["ocp_vscode", "build123d"]
+# ///
+
+from build123d import *
+from ocp_vscode import *
+
+height = 1.0 * IN
+hole_spacing = 1.5 * IN
+x_padding = 0.25 * IN
+y_padding = 0.25 * IN
+thickness = 0.1 * IN
+headphone_holder_thickness = 1.75 * IN
+holder_roc = 3.75 * IN
+bolt_diameter = 3 / 16 * IN
+lip_length = 0.15 * IN
+lip_thickness = 0.15 * IN
+
+
+with BuildPart() as holder:
+    with BuildSketch() as sketch:
+        with BuildLine():
+            l1 = Line((0, 0), (0, height))
+            l2 = Line(l1 @ 1, (hole_spacing + 2 * x_padding, height))
+            l3 = Line(l2 @ 1, (hole_spacing + 2 * x_padding, 0))
+            l4 = RadiusArc(l1 @ 0, l3 @ 1, holder_roc)
+        make_face()
+
+        with Locations(
+            (x_padding, height - y_padding),
+            (x_padding + hole_spacing, height - y_padding),
+        ):
+            Circle(
+                radius=bolt_diameter / 2,
+                mode=Mode.SUBTRACT,
+                align=(Align.CENTER, Align.MAX),
+            )
+    extrude(amount=thickness)
+    fillet(
+        holder.edges().filter_by(Axis.Z).sort_by(Axis.Y)[-2:], radius=bolt_diameter / 2
+    )
+    with BuildSketch() as sketch:
+        with BuildLine():
+            l1 = RadiusArc((0, 0), (hole_spacing + 2 * x_padding, 0), holder_roc)
+            offset(amount=lip_thickness, side=Side.LEFT)
+        make_face()
+    extrude(amount=headphone_holder_thickness + thickness)
+
+    with BuildSketch(
+        Plane.XY.offset(headphone_holder_thickness + thickness)
+    ) as sketch2:
+        with BuildLine():
+            l1 = RadiusArc((0, 0), (hole_spacing + 2 * x_padding, 0), holder_roc)
+            offset(amount=lip_thickness, side=Side.LEFT)
+        make_face()
+    with BuildSketch(
+        Plane.XY.offset(headphone_holder_thickness + thickness + lip_length)
+    ):
+        with BuildLine():
+            l1 = RadiusArc(
+                (0, lip_length),
+                (hole_spacing + 2 * x_padding, lip_length),
+                holder_roc,
+            )
+            offset(amount=lip_thickness, side=Side.LEFT)
+        make_face()
+
+    loft()
+    show(holder)
+export_stl(holder.part, "headphone_holder.stl")