Here is my variant of the GBC (Great Ball Contraption) LEGO ball pump module design by Philippe E. Hurbain.
I used for this module the PF regular motor (part no: 58120cx1).
To lead the soccer balls (part no: x45px1) and basket balls (part no: x493px1) one by one into the ball pump a 10x10 dish (part no: 50990) is turning around.
Wedge bricks form a circle around the dish.
The basket can contain more then 150 soccer balls.
I use a PF Electric Power Functions 9V Medium Motor 3 x 6 x 3 (part no: 58120cx1) for this GBC module because it is possible to control the marble module by a NXT (part no: 53788) using the Hitechnic IRlink.
Watch a video of the Ball Pump module hosted at Google Video:
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