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ceiling fans spin both directions, run on AC, and have three speeds in each direction.
I just gave away one I replaced. check goodwill.
you could used the motor to spin a wheel that touches the hub of the other disc if the speed is not slow enough.
like oO. when the little o is spinning clockwise, the big O will be spinning counterclockwise. the little o can spin fast and the big O will spin more slowly.
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Be Just and Fear Not.
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