Universal, economical tachometer measuring rotational or surface speed either in contact or non-contact way. Universal, economical tachometer measuring rotational or surface speed either in contact or ...

Here we designed a simple non contact tachometer using microcontroller which can measure speed with an accuracy of 1 rev/sec. Here we design a simple non-contact tachometer using microcontroller, ...

A pulse-counting circuit that drives an LCD display is described in detail. It’s often necessary to measure a motor’s rotational speed without any physical contact with the motor or its shaft. Some ...

We love writing up projects that re-use lots of old parts. In fact, we save the links and use them as defense when our significant other complains about the “junk” in the basement. No, that tactic ...

If you’re into anything even vaguely mechanical on the broad hacking spectrum, you’ve come into contact with things that spin. Sometimes, it’s important to know precisely how fast they are spinning!

Engineers often want to monitor a shaft’s rotational speed but get bogged down trying to get sensors, signal conditioners, cabling, and bulky housings to work together. To solve this dilemma, ...