Is the AC/Heater Running?

If you want a visual clue that your cooling/heating system is blowing air, just add a fan to a vent.Print the 3d files from:http://ift.tt/1nl2ecr a pin into the base, then screw the base onto a vent using the vent's side screw. Rest the printed fan blade on the pin head and t...

By: MikeTheMaker



Continue Reading »



from Instructables: exploring - technology http://ift.tt/1nl0Rdy