Hoberman Sphere Lamp

Scissor Linkage • btHingeConstraint • Motor-Driven Expansion • Variable Complexity • OBJ / GLB / STL

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Sphere Geometry

Complexity (subdivisions) 2

Collapsed Radius (cm) 12

Expanded Radius (cm) 30

Strut Length (cm) 10

Strut Radius (mm) 3

Joint Sphere (mm) 5

Material Brass

Motor & Physics

Motor Force 8.0

Motor Speed 1.5

Hinge Damping 0.4

Gravity (m/s²) 0

Strut Mass (g) 20

Expansion Control

Target Expansion 0.0%

Lamp Light

Light Intensity 1.0

Light Color #ffe0a0

Glow On

Hoberman Sphere — 3D

R: 0 cm • α: 0° • Struts: 0 • Joints: 0

Build → Expand / Collapse / Pulse

Live Metrics

Current Radius

0 cm

Scissor Angle α

0°

Expansion

0 %

Collapsed

Expanded

Specifications

Complexity	—
Strut Length	—
R_min	—
R_max	—
Material	—
Motor Force	—
Struts	—
Joints	—

Reference

Hoberman Sphere: Expanding icosidodecahedron linkage
Scissor Joint: Two struts crossing at a central pivot
R ∝ 1/sin(α/2): Radius inversely proportional to half-angle
Motor: Torque applied at hinges drives expansion
Lamp: Point light at center illuminates through gaps

Export

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