Tennis coaches often hand-toss the balls to the students at a very slow pace to help them work on the correct form and technique. A CVMake member built this machine to automate that task.
Machine Specs:
Ball capacity: 40 balls
Battery life: 8 hours
Feed intervals: 2, 3, 5 seconds and customizable
Control: local button or phone app for remote control
Here are the parts needed:
ESP32 Microcontroller
Door threshold
Stepper motor
Spiral basket
12V battery
Tripod with quick-release connector
3D printed parts
The next part of this project is to make a little robot to run around the court to pick up tennis balls automatically!