Hi,
This thread is associated with this
https://forum.arduino.cc/index.php?topic=513368.0
Please use code tags >:( >:( >:( >:( >:( >:(
Please read the first post in any forum entitled how to use this forum.
http://forum.arduino.cc/index.php/topic,148850.0.html then look down to item #7 about how to post your code.
It will be formatted in a scrolling window that makes it easier to read.
How have you got the fan connected to the arduino and its power supply?
Can you please post a copy of your circuit, in CAD or a picture of a hand drawn circuit in jpg, png?
Have you tried yourself to write a very simple PWM code to try and control the fan?
Please... Tom... 