Hello everyone! Today I’m going to discuss a cheap type of useful digital rotation per minute counter (Digital RPM Counter). The 4-Digit LED Display RPM comes with a magnetic proximity sensor switch.

The project describes the construction of a contact-less tachometer by using a 8051 microcontroller and a proximity sensor to be used in counting the revolutions per minute of a rotating shaft. The ...

Every Hot Rod should have a tachometer, and if yours didn't come with one you've got a ton of options. With a Benjamin as the budget, we decided to test seven models from Summit Racing to see how ...

You Can Buy Rev Counters on the Cheap, but Are They Accurate? We Find Out. Every Hot Rod should have a tachometer, and if yours didn't come with one you've got a ton of options. With a Benjamin as the ...