RPM Measurement Using Hall Sensor and Arduino

In continuation with my previous instructable, RC Car that you can find on this link RC Car using infrared. I’ve decided to upgrade the car with RPM measurement using Hall sensor and a neodymium magnet. In the following steps I’ll describe the parts needed for the setup and will provide the code. I did not encounter a good Instructable about RPM measurement with Hall sensor on this site so I hope it will provide valuable information for the potential readers.”