Robotic ammonites recreate ancient animals' movements SciReports
After adjusting buoyancy, each model was positioned underwater with a grabber tool. This tool was fitted with a bundle of fiber-optic cable attached to an infrared remote control. Arduino code was uploaded to the microcontroller in the robot allowing jet pulse duration, number of pulses, and power to be adjusted with this remote control. After an infrared pulse is received, the motor activates, and activity is indicated by a green LED that illuminates the model from the inside.
After sending an infrared signal, the movement of each model was recorded with a submersible camera rig fitted with two waterproof cameras . Each of the four models were monitored during a single, one-second jet for at least 9 trials each. Additionally, the laterally compressed morphotypes were monitored during three, one-second pulses for 10 trials each.
Footage was recorded with two GoPro Hero 8 Black cameras at 4K resolution and 24 frames per second, with linear fields of view. Motion tracking was performed with the software DLTdv8
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