I am trying to control this fan
based on the temperature of the fluid. I would like to vary the rpm speed based on the need to try and get the temperature as close to 190 as possible.
I wrote the manufacture and they said this
'all fans are PWM compatible as the voltage is just being pulsed to modify the speed of it.'
usually I am use to a 3rd wire for the pwm pulse.
My question is, how can I control this 2 wire 12v fan using 'pwm'
(picture of the connector https://www.jegs.com/images/photos/200/259/259-15875_4.jpg )
Thanks in advance.