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.

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 ...

This Arduino based little digital tachometer was originally created for counting the speed of turntables and fidget spinners. There is another application to consider – a rear wheel tachometer for ...

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 ...