| Geomag compass | |
 ' | |
| Type | Dynamic |
| Rods | 10 × 
|
| Spheres | 6 × 
|
| Author | Amafirlian 07:33, 1 May 2007 (UTC) |
A small compass.
Building Instructions 
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- Create a triangle, keeping the spheres neutral.
- Attach three rods to the 3 spheres using the same polarity, and connect them to a single sphere, creating a tetrahedron.
- Repeat the previous step at the other side, but use the opposite polarity to connect ot the original triangle.
- The result is two back to back tetrahedra with rods that are all aligned (except for the ones in the triangle of step 1), creating a nice compass needle.
- Use the last rod and sphere to hang the needle from, and observe how it aligns to the earth magnetic field.
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