I backed a indiegogo project that was supposed to deliver a ping pong robot but they did not deliver.<p>Here's a post I wrote about it <a href="https://medium.com/@mkirank/trainerbot-table-tennis-robot-review-8f571b636a4f" rel="nofollow">https://medium.com/@mkirank/trainerbot-table-tennis-robot-re...</a><p>I started playing around trying to see how this works and built one. The robot is built using laser cut and 3d printed parts.<p>I've used johnny-five, express, sequelize and some python.