https://engineer2you.blogspot.com/
2016/12/arduino-motor-pid-speed-
control.html

https://github.com/GallVp/arduino-
pid-dcmotor/blob/master/README.md
https://circuitdigest.com/microcon
troller-projects/arduino-based-
encoder-motor-using-pid-controller

https://hackaday.io/project/11382-
dc-motor-speed-control-with-pid

https://forum.arduino.cc/t/pid-
speed-control-of-dc-motor-with-
joystick-input/1179431