Me and another friend are currently trying to build a self balancing robot. To learn more about control systems and PID control I wanted to practice on a simpler system first. Part of the inspiration for this build came from The Signal Path's video on a similar magnetic levitation system (<a target="_blank" rel="noopener noreferrer" href="https://www.youtube.com/watch?v=LaGv2FHS5zg&t=1765s">https://www.youtube.com/watch?v=LaGv2FHS5zg&t=1765s</a>)
Nice! How are you getting along with the robot?