Robotic fish uses three servos to swim


polycarbonate-fish

 

Amnon built this robotic fish. The three servos along with some distance sensors for obstacle avoidance are all controlled by a PIC 16F877A microcontroller. [Amnon] tried out three different waterproofing methods; coating the device in varnish, dipping it in hot glue, and dipping it in epoxy. The first two resulted in water damage to the electronics, but the third managed to work. It kept the water out, but also prevents reprogramming of the controller.

Very quick and dirty building (less then 20 hours) . A first generation of robotic fish , with 3 RC servo that where water proof .

 

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