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In this video i show how to use an electromagnet with an optical sensor to continuously accelerate ferromagnetic / magnetic spheres around a circular track. A 12V LiPo battery supplies power to a driver board that energizes a 300-turn coil when a sphere approaches, causing it to accelerate into the center of the coil. I've successfully run the device with up to 3 spheres at a time. The electromagnet is far more powerful against a magnetic sphere, but much more erratic and unpredictable, and the sphere tends to stop suddenly after a few rotations. STL files: :4918703 Music: Kevin MacLeod - George Street Shuffle Heatley Bros - Dimension Drift
