Hello: [image] With a PC fan with yellow tachometer cable I want to control the speed. For example, a fan runs at 12 V. The yellow cable is loose tachometer 5 V and may thereby directly connected to Arduino. Having a 16x2 LCD displays revolutions want as the background. The main thing I want to d…

PC Alarm fan RPM.

system April 4, 2014, 10:02pm 2

hardware ? tachometer datasheet ? schematic of circuit ?

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