This is a radar, designed to detect the distance and direction an object is from the ultrasonic sensor. With the ultrasonic sensor connected to a servo, it has the ability to rotate 180 degress, similar to a radar utilised to detect the position of planes. As the radar wasn’t my original idea, I have also made improvements and adjustments to the original source of this project. This includes 3D printing an ultrasonic sensor bracket, laser cutting a box to make it look cleaner, and the inclusion of a buzzer. The original inspiration for this project can be viewed here: https://www.youtube.com/watch?v=JvmIutmQd9U as it gave me a good understanding into what the end result was going to look like, but also gave me ideas on improvements I could make to the overall aesthetics of the project.”

Link