I'm new to the forum and new to electronics. I am using a 12V/80 Watt fan and want to use a switch to control high and low speeds. From what I've read it appears that using a diode (or multiple) would be the way to go but everything that I've read online has been in reference to CPU cooling fans, not larger fans drawing more amps. I need to mount the switch in a small plastic box so I think that heat might be an issue if I use resistors. Any ideas (written where a layman can understand) would be appreciated.
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