PID

1. PID beam 1

https://pab47.github.io/

https://pab47.github.io/robotics.html

https://pab47.github.io/reports/Beam_Ball_Balancing.pdf

2. PID beam 2

https://github.com/yigithansenvar/PID_BALL

https://www.youtube.com/watch?v=tUDcpdTnhn4

2. PID beam3

http://mechatronicstutorials.blogspot.com/2014/07/balancing-of-ball-on-beam-using-arduino.html