A motorized rotating counterweight keeps an artist's whale guts swaying back and forth. I used a right-angle drill for its compact form factor and to facilitate mounting. The drill battery powers a motor controller board and Arduino. A heavy claw hammer was used as a simple counterweight. Two potentiometers allow the artist to control sway speed and interval. The artist's installation required that the system be fully self-contained for safety but also permit quick battery changes by gallery attendants.
This design also prioritizes easy dissasembly after the exhibit was complete so the artist can use the tools and electronics in their other projects!
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