Auto feeder machine

Hello Has anyone made an auto feeder machine? Some tips would be great! Thank you!

Here’s a project documentation for a pet feeder. Therein also Banana Pi is listed:

Rochester Institute of Technology
Final Project Report
Computer Engineering Design Project I
Automated Cat Feeder
By: Matt Smith, Chris Ranc, and Shabab Siddiq
A smart solution to automate and regulate the
feeding of common household pets
Proposal Submission Date : 5/06/2018