Automatic Fan/Aux Switch for the UP! Printer.

thingiverse

After making the stepper cooler, which ran off a separate power supply, I needed a way to automatically turn the fan on when the printer is active. A way besides a master / slave powerboard. So, here it is! Simple little microswitch that turns the fan (or whatever else you want it to) when the platform is anywhere above shutdown state. You'll need a microswitch that has the long metal tag (it's about twice the length of the plastic of the microswitch) - Pretty sure Jaycar has them. Instructions Print with the side section orientated flat on the build platform for best results. Prints well without supports.