Quote: Can someone with a little more knowledge tell me what the green resistor thingie is for? I assume the electromagnet looking coil is there to provide a charge to the plates inside the windings.
The light green 'box' near the input is a 4.7uF capacitor. Likely just to provide additional decoupling for the circuitry.
I'd need a better picture of where the traces go to SWAG what the coil does.
Most fan controllers work by changing the frequency that they turn the fan on. If you turn it on and off really fast, the fan will average out to half speed. If you leave it on a little longer than you leave it off, it will run a bit faster still. That's what all the circuitry I'm guessing does. You also want big capacitors (the two big blue ones) on the output to smooth the output voltage a bit, and provide help when you start it.
I'm considering a fan like this for my truck (tired 318)... with a 6 blade fixed fan, good shroud, and new 3 core rad, it still won't really cool itself off at idle
If you ever find yourself in a fair fight, your tactics suck.
