A Small Diy Tubular Linear Motor

Testing of my first small linear motor with four coils and a shaft of 16 neodynium magnets. Controlled by an ATtiny44.

The pure coils without inner tube:
Outer diameter: 8 mm
Inner diameter: 6 mm
Length: 6 mm
Coil distance: 1 mm
Wire: 0.1 mm

16 cylindrical neodynium magnets: 3 mm x 6 mm
Orientation of the magnets: N-S S-N N-S S-N N-S S-N N-S ....

Pics:
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