YouTube Tutorial:-
Materials:-
Arduino UNO :- http://amzn.to/2jh3MWO
Ultrasonic Sensor :- http://amzn.to/2jTiX9H
Display 16x2 :- http://amzn.to/2kjoIhE
Jumpers wires :- http://amzn.to/2kjvHag
Potentiometer :- http://amzn.to/2jhanAd
Mini switch :- http://amzn.to/2kuDVbT
Circuit:-
Code:-