Observatory Control Using Ultrasonic Sensors.

This is the third and final video in a three part series on the automation of my observatory. This final video is featuring ultrasonic sensors to control the position of the observatory roof in relation to where the telescope is pointing and tracking. This is a DIY project and concept from the beginning to the end. As far as I am aware this is a first of it's kind. As far as I can find anyhow? ENJOY