https://www.youtube.com/@ALMA.Industries Chapter 3 Footnote 1. Building an Actuator, a PID Control Loop, and an Ultrasonic Distance sensor to detect and not crash into the ceiling. The full video is on my channel where I walk through the whole build, and then explain a bit about how the PID controller works.   submitted by   /u/ALMA_x11 [link]   [comments]