Need a help

how to monitor the current of cpu fan using power mosfet and display on the arduino?

Dargoon:
how to monitor the current of cpu fan using power mosfet and display on the arduino?

Basically you can’t.
You have to use a shunt and measure the voltage across it. I don’t see how a mosfet will fit into this.

Most people who post here need help, so a title of "Need a help" just wastes time.

Use a current sensor. Adafruit and Sparkfun have some good ones.