!!! Work in progress. !!! Servo operated ambient controller for 3D printer enclosures.
Example video : https://www.youtube.com/watch?v=DbXVjOoNJw4
PCB files : https://easyeda.com/AcE_Krystal/Ambient-Controller-3Dprinter-Enclosure
3D files : https://www.prusaprinters.org/prints/5141-ambient-control-pcb-brain-box or https://www.thingiverse.com/thing:3747281
Code : https://github.com/acekrystal/Servo-Ambient-Controller
Instructable : Yet to Come (I hope ;)