https://www.youtube.com/@ALMA.GeoffreyAment An actuator with Ultrasonic Distance sensor is built and controlled. A second Ultrasonic sensor is used to set the position, which is in close loop feedback with the actuators Ultrasonic sensor. All sensors are controlled by microcontroller. Full video has a long demo Position setting, Feedback following, and Error on a graph, and how they are used within the PID control loop. submitted by /u/ALMA_x11 [link] [comments]