Cooling Fan Tachometer standards

Internet is usually a goldmine of all technical information, but there’s not much on the internet about the rpm rotation sensor and it’s specification. CPU Cooling Fan Tachometer standards tries to fill this gap. It page describes a little about the tachometer or rpm rotation sensor and it’s electronics.

CPU fan pinout page gives the pin-out information for PC fans:

Pin Color Description
2 +12V
3 Tachometric Signal


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