Nickel Feeder

A capstone project to improve the health of a sea turtle

  • Completed on: June 2019
  • Skills: Solidworks | Pneumatics | Arduino
  • Team Members: Ella | Peter | Mark | Yufei
  • Gallery: Demo Video

In collaboration with Shedd Aquarium, we wanted to encourage Nickel, the resident sea turtle, to have a healthier lifestyle. Currently, due to her regular feeding schedule, Nickel has learnt to be active only during feeding times.

In order to motivate Nickel to exercise more throughout the day, we originally envisioned deploying an array of feeders that would activate when Nickel pressed a button. We hoped that this interaction would give Nickel a sense of control over her food source and therefore motivate her to be active outside of regular feeding times.

To ensure that our feeder remained robust underwater, we powered it pneumatically. The pneumatics were controlled by a microcontroller at the surface, which gave us more control over the entire system. During the prototyping phase, we encountered unforeseen technical challenges with the pneumatics system that significantly delayed our plans.

As a result, we decided to simplify the design by removing the pneumatic push-button valve. In its place, we implemented a random release system using microcontroller-controlled electric valves. While Nickel no longer has direct control over her feeding times, this new design still introduces irregularity into her daily schedule.

From our testing at Shedd Aquarium, the dispensers worked underwater, but Nickel did not respond immediately to the dispensed greens. Based on client feedback, it might be due to Nickel's lack of experience with food sources from inanimate objects. However, he was confident that Nickel would eventually associate the dispensers with food and become less dependent on the trainers' schedule.