I realised that linear regulators would require a heatsink, which isn't that big of a deal for me. I went with VR's because that was my first real soldering expedition. I wanted something easy to do so I could learn how, before doing something more tricky like a PWM. Plus, I think I heard somewhere that Comair fans growl a lot when you use a PWM. Don't know if that is really true, but they seem pretty nice and quiet with my LM338 circuit at lower voltages.
BO(V)BZ
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