Motorized Yo-yo
Intro: Motorized Yo-yo
This is the result of one of my class projects. We were given the very open-ended task of improving a yo-yo. We were just supposed to come up with the design and analyze it, but I thought it would be way more fun to actually make something.
The center axle is a bearing removed from the read/write arm of an old hard drive. The motor and battery are from a small $20 RC helicopter, the belt is just a small rubber band, and the body is built out of PVC. When the yo-yo is dropped the spinning causes the spring to bend outward and make contact with another piece of metal which closes the circuit and powers the motor. The result is a yo-yo that sleeps for as long as the battery lasts.
Here is a video of the yo-yo in action http://www.youtube.com/watch?v=1_2cGBFV2OM
The center axle is a bearing removed from the read/write arm of an old hard drive. The motor and battery are from a small $20 RC helicopter, the belt is just a small rubber band, and the body is built out of PVC. When the yo-yo is dropped the spinning causes the spring to bend outward and make contact with another piece of metal which closes the circuit and powers the motor. The result is a yo-yo that sleeps for as long as the battery lasts.
Here is a video of the yo-yo in action http://www.youtube.com/watch?v=1_2cGBFV2OM
5 Comments
clide 14 years ago
hg341 15 years ago
clide 15 years ago
hg341 15 years ago
clide 15 years ago
I got lucky on the video that it stayed balanced the whole time. Usually I need to use the card every so often to keep it balanced.
I have a starburst pattern on one side of the yo-yo. I originally had it on both but I had to remake one side from the first prototype and never got around to remaking the starburst. I think it might return if I remake the starburst on the other side. But having it return introduces another problem; the yo-yo changes direction with every throw and I would need a way to deal with that.
As it is now I just manually activate the switch and the motor automatically starts to wind the yo-yo to prepare for the next throw.