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.

Watch the YouTube video on how it operates.

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!