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 a good bet most anyone reading this article is quite familiar with the bright yellow 1957 Chevy 2-door coupe that’s known as Project X. This article on how to install an electric tachometer in a ...

With more and more new-car buyers choosing automatic transmissions over manuals, why do tachometers still have such a large presence on dashboards? The tachometer displays engine speed in revolutions ...

for mower engines. A Tachometer is a gauge on a vehicle that tells you how quickly the crankshaft of the engine is turning. It is typically a unit of measure called revolutions per minute (RPM). There ...

This digital DIY tachometer for bikes uses two reed switches to get the speed information of the bicycle. The reed switches are installed near the rim of the wheel where permanent magnets pass by. The ...

Honda H’ness CB350’s instrument cluster is a semi-digital unit. There’s a big dial that contains an analogue speedometer and a small digital display that shows info like fuel level, gear position ...