Hello ! I have read lots of post about controlling a common 12v fan with the 3rd yellow pwm pin and tried all of them without success. All the time the fan was spinning at 100% I either do something wrong or my fans are failed. I use common ground of 12v psu for fan and for arduino, then I conne…

(help) Control a 3-pin PC fan

thebadtall June 25, 2013, 10:19pm 3

Hello, I have tried analog write 0...255 with no luck, also tried some servo examples but again nothing happened.

Maybe those fans yellow wire is a speed output ?

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