What is a good (cheap) practice to manage a fan with a thermistor?
Here is what I think to do:
This should work as temperature change to speed up or down the fan, right?
I do not want to make a IC controlled fan controler for it. I need to work in very tiny box beetween actually existing fan wires (it makes too much noise) so the idea is to lower its speed by few % only.
I may be able to work around with a mosfet "classical" fan drive schematic but then I need to deport that elsewhere in the box.
I mean something like this:
Is first schematic useable or I need to work around second one (with the mosfet?)