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!

It’s the latest in instrumentation for the well-appointed shop — an acoustically coupled fast Fourier transform tachometer. Sounds expensive, but it’s really just using a smartphone spectrum analyzer ...

AutomationDirect’s line of tools now includes SHIMPO handheld stroboscopes and tachometers available in AC-powered, rechargeable and battery-powered models. AutomationDirect’s line of tools now ...