simuladores PID
http://grauonline.de/alexwww/ardumower/pid/pid.html
https://www.csimn.com/CSI_pages/PIDforDummies.html
http://www.engineers-excel.com/Apps/PID_Simulator/Description.htm
https://www.pid-tuner.com/pid-control/
https://sourceforge.net/projects/pid-simulator/
http://www.apco-inc.com/simtune
http://www.mstarlabs.com/docs/tn031.html
https://pidtuner.com/