I am working on a project to add automation to a classic holiday decoration. I have an Ernest the Balancing Bear. It is a toy/decoration from back in the day. Essentially it’s a self-balancing bear on a wheel that rolls on a tight wire. You affix the wire to a wall and pull down on the wire and the bear rolls towards you. What I would like to do is fix one side of the wire to the wall and then move the other side up and down with a motor and Arduino. I would prefer this be powered by batteries.
My thought was to use an Arduino Nano with a Stepper motor and driver. I could use the standard stepper library. I would attach a small arm to the stepper and attach the wire to the arm. I could spin the motor back and forth to half and negative half, forcing the wire up and down. I have attached a sketch of the concept for reference.
Is using a stepper with an arm a good approach, or can you think of something different? If a stepper is the best route, how do I go about figuring out the size needed and then matching a power source? Is using battery for this realistic?
I have attached a motor spec of one I have on hand if it could work.