In the past few months, we have covered plenty of smartphone controlled pet feeders. Don’t want to buy one? You can always build yours with Arduino and other simple components. As the circuito.io team explains, you are going to need a PIR motion sensor, WiFi module, speaker, SparkFun Servo, and other components to complete this project.
You can customize this project with 3D printed components to add even more features to it. More info is available here.