PowerSpec Ultra PWM Fan Switch/Speed Controller

Followed the advice from [this thing](https://www.thingiverse.com/thing:2095862) for a PWM fan speed controller and mount.

I purchased a different PWM controller and have a different printer, so I designed this for its power switch and potentiometer. I wired it to the stock blower fan, but you could also add a separate fan if you wanted. It comes with a three-way switch, but I only needed on/off.

This fits on the right side of the printer below the SD card/USB port and uses an existing scr