Help for choosing the right module - pmw


I want to control a 12V pc fan speed with my arduino yun.

I’m gonna plug the fans in a 24V DC power supply I’d like to variate the voltage (or pulse).

I need some help for choosing the right module. It won’t use more than 2 amps.

Thanks for helping

Here are some useful motor control modules. They take up to 3 amps and 5 to 35 volt separate power for your motor.