Open Close Door Stopper

thingiverse

You're getting a clear signal from this door stop - when it's wedged into place, the word "open" will be staring you right in the face, and as you pull it out, "close" will flash before your eyes. To get the most out of this clever device, consider printing with a high infill percentage to give it some real heft, or slip a rubber mat underneath to keep it firmly in place.