Rather than being powered by a continuous supply of power (which would ordinarily be the case) our DC fan motor is being fed with pulses of power it is essentially being switched on and off very rapidly. Think of a PWM signal as if it were a beating heart. Although you don’t need to understand the ins and outs of PWM, it helps to have a rough idea about how PWM works, so here’s a very quick explanation. PWM stands for Pulse Width Modulation and is, among other things, a very clever means of controlling power to electrical devices: in our case a DC (direct current) fan motor. Fortunately, this neat fan controller project requires only a little time, expense, and commitment, and the circuit is relatively easy to build and very satisfying to use! First Things First…What is PWM? However, when it comes to building parts of your computer from scratch, the tally of enthusiasts who can claim this prestige most certainly diminishes.

I’m sure that most hardware enthusiasts are no strangers to dalliances with DIY, whether it be case modding, component modding, or custom cooling.

Fedora fan control