YouTube Tutorial:-Arduino RPM Counter | Speed CounterMaterials:-Arduino NANO:- https://amzn.to/2GPN5yX IR Proximity Sensor:- https://amzn.to/2qlb1QG 16x2 LCD Display:- http://amzn.to/2kjoIhE 100k Potentiometer:- https://amzn.to/2qt0PF1 Breadboard:- http://amzn.to/2jimzkw Jumpers:- http://amzn.to/2kjvHag Circuit:-Code:-