I found some $1.49 rubber bats and I'd like to make them bounce up and down and maybe move up and down in a smooth linear fashion while bouncing. They weigh practically nothing so I think this would be a good first start for me in Arduino controlled electric motors. Off hand, it seems the best way …

Lobed Gears For Bouncing Bat Halloween Question

zoomkat October 5, 2012, 4:50pm 2

You can use a continous rotation servo with a linkage to make something go up/down or back/forth.

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