If you are in a plan to build your own speedometer for your next robotic vehicle, ofcourse you need an RPM sensor to complete the task. Today, almost all sensor modules for use with microcontrollers ...

Normally, a car's rpm increase steadily and predictably as you step on the gas pedal. But there are several reasons why this ...

Adding an additional fan to your PC is usually pretty straightforward, but as [Randy Elwin] found, this isn’t always the case with the newer Small Form Factor (SFF) machines. Not only was the standard ...

This one is almost too simple, but it might come in handy. It turns out that Pabst fans (and probably several others) already have the circuitry for RPM monitoring. Pop it apart allow pcb access and ...

So I just bought this nice new switch off Ebay for cheap and it has 4 very loud fans in it. I'd like to replace them with lower noise (and lower flow, I'll take my chances) fans so I can hear myself ...

I just had an Idea. Sure was neat.<P>Make a small (bay/Fan)bus like thing, right? And have another connect on there for RPM sensors, lead that wire to an LCD screen mounted in the front, and using ...