The tachometer peripheral illustrated in Figure 1 implements optical ... of the rotating object (e.g., number of blades on the propeller) to produce an accurate RPM reading. Stephen Woodward’s ...

It’s the latest in instrumentation for the well-appointed shop — an acoustically coupled fast Fourier transform tachometer ... your tooling to get the right RPM, and obviously you’ll ...

Could it measure the RPM of the lathe? And so began [Bill]’s quest for a 2D printed lathe tachometer. The first attempt was to wrap a piece of paper printed with evenly space numbers around the ...